subject:(phenolic acids)

University of Manitoba

1. Hambira, Chipo. Proanthocyanidins, anthocyanins and phenolic acids in food barleys of diverse origin.

Degree: Food Science, 2010, University of Manitoba

URL: http://hdl.handle.net/1993/3841

► Phytochemicals found in grains complement those found in fruits and vegetables. These phytochemicals, though minor compounds, contribute to the antioxidant properties which are related to… (more)

▼ Phytochemicals found in grains complement those found in fruits and vegetables. These phytochemicals, though minor compounds, contribute to the antioxidant properties which are related to the health benefits associated with the consumption of whole grain. In this thesis project, nine barley genotypes of diverse origin namely CI2230 from Nepal, CI1248 from Israel, 3 Peruvian genotypes; Peru 3, Peru 16 and Peru 35, Hokuto Hadaka from Japan, EX116; a cross between Moroccan and Canadian genotype, EX83; a cross between two Canadian genotypes and EX127; a cross between Canadian and German genotypes were studied. The genotypes were categorized based on appearance into purple, black and yellow grains. Phenolic acids and flavonoids were identified and quantified in these diverse genotypes using HPLC-ESI-MS analysis. The main classes of dietary flavonoids studied in the barleys were anthocyanins and flavan-3-ols. Phenolic acids were identified and quantified (p-coumaric, ferulic, sinapic, caffeic, vanillic). Three ferulic acid dehydrodimers (8-0-4â DFA, 8-5â benzofuran form and 5-5â DFA) were also identified. The most abundant dimeric flavan-3-ols were procyanidins B3 and prodelphinidin B3. The monomeric unit, (+)-catechin, was the most abundant while catechin glucoside (m/z 451) was also identified. Among the Peruvian genotypes, Peru 16 and Peru 35 exhibited relatively high levels of total PA content. Total phenolic content and antioxidant activities of methanolic, acetone and alkali hydrolyzed extracts of the nine barley genotypes was determined by the Folin- Ciocalteau assay, DPPH radical scavenging assay and oxygen radical absorbance capacity (ORAC assay).The acetone extract exhibited the highest antioxidant capacity using all the methods of analysis. Furthermore, dark colored grains were found to exhibit higher contents of phenolic compounds. The phenolic acids, PAs and anthocyanins identified and quantified had significant contribution to the overall antioxidant capacity of the barley whole grain. Four hull-less genotypes namely CI2230, EX127, CI1248 and Peru 35 were further partially sprouted to establish the effects of sprouting on phenolic acid composition. Partial sprouting was observed to significantly increase the soluble conjugated phenolic acids. The barley genotypes studied were found to contain different quantities of phytochemicals and had high proanthocyanidin content thereby rendering them as alternative sources of antioxidants. Barley sprouts present a possible novel food ingredient with improved properties such as phenolic acid composition and other benefits such as easier incorporation into food products under development. Advisors/Committee Members: Dr Trust Beta (Food Science) (supervisor), Dr Gary Fulcher (Food Science), Dr Mohammed Moghadasian (Human Nutritional Sciences) (examiningcommittee).

Subjects/Keywords: Barley; Proanthocyanidins; Phenolic Acids; Phenolic Compunds; Anthocyanins; Antioxidant Activity; Grains; ORAC; DPPH; Total phenolic content

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APA (6^th Edition):

Hambira, C. (2010). Proanthocyanidins, anthocyanins and phenolic acids in food barleys of diverse origin. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/3841

Chicago Manual of Style (16^th Edition):

Hambira, Chipo. “Proanthocyanidins, anthocyanins and phenolic acids in food barleys of diverse origin.” 2010. Masters Thesis, University of Manitoba. Accessed January 21, 2021. http://hdl.handle.net/1993/3841.

MLA Handbook (7^th Edition):

Hambira, Chipo. “Proanthocyanidins, anthocyanins and phenolic acids in food barleys of diverse origin.” 2010. Web. 21 Jan 2021.

Vancouver:

Hambira C. Proanthocyanidins, anthocyanins and phenolic acids in food barleys of diverse origin. [Internet] [Masters thesis]. University of Manitoba; 2010. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/1993/3841.

Council of Science Editors:

Hambira C. Proanthocyanidins, anthocyanins and phenolic acids in food barleys of diverse origin. [Masters Thesis]. University of Manitoba; 2010. Available from: http://hdl.handle.net/1993/3841

University of Sydney

2. Khoddami, Ali. Phenolic Compounds in Grains of Australian-Grown Sorghums: Quantitative Analyses including Impacts of Malting and Effects on Broiler Nutrition .

Degree: 2015, University of Sydney

URL: http://hdl.handle.net/2123/14985

► Grain sorghum (Sorghum bicolor) is one of the most important food and animal feed crops in arid and semi-arid regions of the world. Sorghum grain… (more)

▼ Grain sorghum (Sorghum bicolor) is one of the most important food and animal feed crops in arid and semi-arid regions of the world. Sorghum grain is rich in starch and contains many functional health-promoting compounds including B-group vitamins, vitamin E and a broad range of phenolics. There is increasing interest internationally to extend the commercial use of sorghum grain as an affordable but nutritious source of animal feed and as a functional food. The utilisation of energy by broiler chickens offered sorghum-based diets seems inadequate due to various factors such as kafirin, phytate and phenolic compounds, which may limit energy utilisation. The increased use of sorghum as a human food might be achieved partly through understanding the effects of various forms of grain processing. Malting is a biotechnological process that involves soaking, germination and kilning of the grain. For sorghum, malting has been identified as an effective process to increase the bioavailability of the macro- and micronutrients for sorghum based-foods but many questions concerning the biochemical effects of malting remain unanswered. There were two primary objectives for the research presented in this thesis: (1) To assess whether the abundance of phenolic compounds of a range of different classes influences energy utilisation in broiler chickens fed sorghum-based diets (Chapter 3), and (2) To evaluate the impact of malting on the abundance of several classes of sorghum phenolics (Chapter 4 to 6). A substantial collection of Australian-grown sorghum grains were analyzed for total phenolics, flavan-4-ols, antioxidant activity (DPPH; 2,2-diphenyl-1-picrylhydrazyl and ABTS; 2,2’-azinobis(3-ethyl-benzothiazoline-6-sulfonic acid)), total flavonoids and total anthocyanins. Separation, identification and quantification of 3-deoxyanthocyanins, flavones, flavanones, as well as free, conjugated and bound phenolic acids, were also performed using high performance liquid chromatography (HPLC) and liquid chromatography coupled with mass spectrometry (LC-MS). Objective (1) was achieved through collaboration with experts in broiler chicken digestive physiology. A pigmented testa was found to be absent in all the Australian-grown sorghum cultivars examined (16 and 8 cultivars for Objectives (1) and (2), respectively), indicating that they were type I sorghums, which (by definition) lack condensed tannin. Analyses and assessments of other polyphenolic compounds, including flavan-4-ols and phenolic acids, appear to show that these have negative influences on broiler growth and meat production. The total phenolic content (TPC), in vitro antioxidant activity (DPPH and ABTS) and level of flavan-4-ols in the Australian sorghum grains ranged from 3.00 to 4.68 mg GAE/g, 8.50 to 14.47 mol TE/g, 18.81 to 33.73 umol TE/g and 0.84 to 7.98 abs/ml/g, respectively, where /g indicates per gram of grain on a dry matter basis in each case, as used for all experiments reported in this thesis. The total anthocyanin and total flavonoid level ranged from 1.30 to…

Subjects/Keywords: Sorghum; Phenolic compounds; Phenolic acids; Flavonoids; Malting; Broiler chicken

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APA (6^th Edition):

Khoddami, A. (2015). Phenolic Compounds in Grains of Australian-Grown Sorghums: Quantitative Analyses including Impacts of Malting and Effects on Broiler Nutrition . (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/14985

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Khoddami, Ali. “Phenolic Compounds in Grains of Australian-Grown Sorghums: Quantitative Analyses including Impacts of Malting and Effects on Broiler Nutrition .” 2015. Thesis, University of Sydney. Accessed January 21, 2021. http://hdl.handle.net/2123/14985.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Khoddami, Ali. “Phenolic Compounds in Grains of Australian-Grown Sorghums: Quantitative Analyses including Impacts of Malting and Effects on Broiler Nutrition .” 2015. Web. 21 Jan 2021.

Vancouver:

Khoddami A. Phenolic Compounds in Grains of Australian-Grown Sorghums: Quantitative Analyses including Impacts of Malting and Effects on Broiler Nutrition . [Internet] [Thesis]. University of Sydney; 2015. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/2123/14985.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Khoddami A. Phenolic Compounds in Grains of Australian-Grown Sorghums: Quantitative Analyses including Impacts of Malting and Effects on Broiler Nutrition . [Thesis]. University of Sydney; 2015. Available from: http://hdl.handle.net/2123/14985

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Louisiana State University

3. Gao, Ya. Antioxidant Activities and Phenolic Acids in Different Raw and Boiled Potatoes and Sweet Potatoes.

Degree: MS, Life Sciences, 2014, Louisiana State University

URL: etd-04012015-090711 ; https://digitalcommons.lsu.edu/gradschool_theses/3849

► Antioxidants have attracted great interests from food industries and scientists in recent years, because they have the capacity to reduce the harmful oxidation reaction in… (more)

Subjects/Keywords: potato; phenolic acids; antioxidant activities; sweet potato

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APA (6^th Edition):

Gao, Y. (2014). Antioxidant Activities and Phenolic Acids in Different Raw and Boiled Potatoes and Sweet Potatoes. (Masters Thesis). Louisiana State University. Retrieved from etd-04012015-090711 ; https://digitalcommons.lsu.edu/gradschool_theses/3849

Chicago Manual of Style (16^th Edition):

Gao, Ya. “Antioxidant Activities and Phenolic Acids in Different Raw and Boiled Potatoes and Sweet Potatoes.” 2014. Masters Thesis, Louisiana State University. Accessed January 21, 2021. etd-04012015-090711 ; https://digitalcommons.lsu.edu/gradschool_theses/3849.

MLA Handbook (7^th Edition):

Gao, Ya. “Antioxidant Activities and Phenolic Acids in Different Raw and Boiled Potatoes and Sweet Potatoes.” 2014. Web. 21 Jan 2021.

Vancouver:

Gao Y. Antioxidant Activities and Phenolic Acids in Different Raw and Boiled Potatoes and Sweet Potatoes. [Internet] [Masters thesis]. Louisiana State University; 2014. [cited 2021 Jan 21]. Available from: etd-04012015-090711 ; https://digitalcommons.lsu.edu/gradschool_theses/3849.

Council of Science Editors:

Gao Y. Antioxidant Activities and Phenolic Acids in Different Raw and Boiled Potatoes and Sweet Potatoes. [Masters Thesis]. Louisiana State University; 2014. Available from: etd-04012015-090711 ; https://digitalcommons.lsu.edu/gradschool_theses/3849

Rutgers University

4. Xu, Yanping, 1980-. Identifications of polyphenols and quantification of anthocyanidins in grapes and grape-derived products.

Degree: MS, Medicinal Chemistry, 2011, Rutgers University

URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057721

► Polyphenols in grapes and grape-derived products have attracted public and scientific attention due to their numerous protective roles to human health. A rapid and comprehensive… (more)

▼ Polyphenols in grapes and grape-derived products have attracted public and scientific attention due to their numerous protective roles to human health. A rapid and comprehensive qualitative method was developed to characterize the different classes of polyphenols, such as anthocyanins, flavonols, phenolic acids and flavanols/proanthocyanidins, in grapes and grape-derived products. The detection was achieved by two runs with same HPLC gradient in different MS ionization modes and mobile phase modifiers (positive mode and 0.4% trifluoroacetic acid for anthocyanins and flavonols, negative mode and 0.1% formic acid for phenolic acids and flavanols). Under the optimized LC/MS conditions and based on the analysis of the MS and UV data and in comparison with the authenticated standards, a total of 53 polyphenolic compounds were successfully separated and individually identified including 33 anthocyanins, 12 flavonols, 4 phenolic acids and 4 flavanols/proanthocyanidins. With the method developed, a survey was conducted to qualitatively assess and compare the composition of polyphenols among 29 grapes and grape-derived products. To facilitate the quantitation of the major class of polyphenolic anthocyanidins, a simple and precise acid assisted hydrolysis method was established for the quantitation of anthocyanidins in grape juice samples, grape berries and grape skins using LC/MS. Five most common anthocyanidins of delphenidin, petunidin, cyanidin, malvidin, and peonidin in the hydrolyzed grape extracts were included in the quantification study. The validation of this method showed that the recovery percentages of five anthocyanidins ranged from 98.59 % to 103.20% with the relative standard deviation (RSD) less than 5.03%. The qualitative method provided complete insight into the composition of polyphenols in grapes, and other grape-derived products. This quantitative method provides a rapid and accurate tool to quantitatively study individual anthocyanidin in grapes or grape juice samples for quality control and to facilitate the evaluation and comparison of new commercial grapes or grape juice products in market. Advisors/Committee Members: Xu, Yanping, 1980- (author), Simon, James E (chair), Wu, Qingli (internal member), LaVoie, Edmond J (internal member).

Subjects/Keywords: Polyphenols; Grapes – Therapeutic use; Phenolic acids; Anthocyanins

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APA (6^th Edition):

Xu, Yanping, 1. (2011). Identifications of polyphenols and quantification of anthocyanidins in grapes and grape-derived products. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057721

Chicago Manual of Style (16^th Edition):

Xu, Yanping, 1980-. “Identifications of polyphenols and quantification of anthocyanidins in grapes and grape-derived products.” 2011. Masters Thesis, Rutgers University. Accessed January 21, 2021. http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057721.

MLA Handbook (7^th Edition):

Xu, Yanping, 1980-. “Identifications of polyphenols and quantification of anthocyanidins in grapes and grape-derived products.” 2011. Web. 21 Jan 2021.

Vancouver:

Xu, Yanping 1. Identifications of polyphenols and quantification of anthocyanidins in grapes and grape-derived products. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2021 Jan 21]. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057721.

Council of Science Editors:

Xu, Yanping 1. Identifications of polyphenols and quantification of anthocyanidins in grapes and grape-derived products. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057721

University of New South Wales

5. Haron, Normah. Bioactives in traditional Malaysian vegetables and their antioxidant activities.

Degree: Chemical Sciences & Engineering, 2013, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/53318 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12013/SOURCE01?view=true

► The aim of the present study was to develop a specific and quantitative analytical method to determine the individual concentrations of naturally occurring phenolic acids… (more)

▼ The aim of the present study was to develop a specific and quantitative analytical method to determine the individual concentrations of naturally occurring phenolic acids and flavonoids and their metabolites in food; then evaluate the antioxidant capacity of the quantified phenolic acids using different assays. An LC-MS/MS method for the quantification of 9 phenolic acids and 5 commonly present flavonoid compounds in plant foods was developed. Target analytes were the benzoic acid based phenolic acids - anisic, gallic, salicylic, protocatechuic, and vanillic acid, together with the cinnamic acid based phenolic acids - caffeic, p-coumaric, ferulic and sinapinic acid. As for the flavonoids, target analytes were apigenin, luteolin, kaempferol, quercetin and myricetin. These compounds were identified by retention times and comparison of electron impact mass spectra. Deuterium-labelled ferulic acid and 13C-labeled quercetin were used as the internal standards to achieve accurate quantification. Purification was accomplished using Strata® SDBL (styrene-divinylbenzene) cartridges for solid phase extraction (Phenomenex, US). Sample extracts were subjected to acid and/or alkaline hydrolysis to release the free phenolic acids and flavonoids from the ester and glycoside forms found in plant materials. The resolution and quantitation of all compounds were excellent with linear calibration curves over the range detection limit for each compound to 750 ng/µL and correlation coefficients (R2) greater than 0.9643. The intraday assay range of relative standard deviation (RSD) was 2.6-9.0 for high concentrations and 2.3-16.7 for low concentrations of a standard mixture. For interday assay, the relative standard deviation (RSD) ranges were 10.8-20.2 for high concentrations and 12.7-19.4 for low concentrations. Percentage recovery of analytes were satisfactory (72 to 128% respectively) and within the acceptable limits of bioanalytical method validation guidelines (FDA, 2001). The developed and validated method was applied to different types of Malaysian traditional vegetables, fresh (n=15). The results revealed that flavonoids are the most abundant polyphenols in plant extracts, followed by hydroxycinnamic acids of phenolic acids, mostly in bound form as esters or glycosides. Only hydrophilic antioxidant activities of all selected samples were examined using ORAC assay. In addition the antioxidant capacity of the identified free and bound phenolic acids content was measured using different assays including ORAC, ABTS, and DPPH assay (end-point assay and kinetic assay). The results indicate that the total phenolic acids content did not correlate positively with antioxidant activity, but the total flavonoid content was positively correlated with antioxidant activity. In conclusion the analytical method presented is robust, safe, and generally applicable to the analysis of free and bound phenolic acids and flavonoids in food samples. Advisors/Committee Members: Arcot, Jayashree, Chemical Sciences & Engineering, Faculty of Engineering, UNSW, Bucknall, Martin, Biomedical Mass Spectrometry Unit, Faculty of Medicine, UNSW, Ismail, Amin, Universiti Putra Malaysia.

Subjects/Keywords: Flavonoids; LC-MS/MS; Phenolic acids

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APA (6^th Edition):

Haron, N. (2013). Bioactives in traditional Malaysian vegetables and their antioxidant activities. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/53318 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12013/SOURCE01?view=true

Chicago Manual of Style (16^th Edition):

Haron, Normah. “Bioactives in traditional Malaysian vegetables and their antioxidant activities.” 2013. Doctoral Dissertation, University of New South Wales. Accessed January 21, 2021. http://handle.unsw.edu.au/1959.4/53318 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12013/SOURCE01?view=true.

MLA Handbook (7^th Edition):

Haron, Normah. “Bioactives in traditional Malaysian vegetables and their antioxidant activities.” 2013. Web. 21 Jan 2021.

Vancouver:

Haron N. Bioactives in traditional Malaysian vegetables and their antioxidant activities. [Internet] [Doctoral dissertation]. University of New South Wales; 2013. [cited 2021 Jan 21]. Available from: http://handle.unsw.edu.au/1959.4/53318 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12013/SOURCE01?view=true.

Council of Science Editors:

Haron N. Bioactives in traditional Malaysian vegetables and their antioxidant activities. [Doctoral Dissertation]. University of New South Wales; 2013. Available from: http://handle.unsw.edu.au/1959.4/53318 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12013/SOURCE01?view=true

University of Alberta

6. Kandil, Amin AA. Understanding the Effect of Non-starch Grain Components on the Amylolysis of Starch in Whole Grains.

Degree: PhD, Department of Agricultural, Food, and Nutritional Science, 2016, University of Alberta

URL: https://era.library.ualberta.ca/files/c44558d48r

► Bioethanol industry is fast growing as it is a clean substitute of fossil-fuel. Starch is a clean, cheap & non-toxic source for bioethanol production. Efficient… (more)

▼ Bioethanol industry is fast growing as it is a clean substitute of fossil-fuel. Starch is a clean, cheap & non-toxic source for bioethanol production. Efficient conversion of starch to fermentable sugars is important. The objective of this research was to investigate the effect of non-starch grain components on the amylolysis of starches isolated from triticale, wheat, corn and barley grains. Dry-milling and non-starch components of flours may impact the enzymatic hydrolysis of starch to glucose. The particle size distributions of ground flours from whole grain triticale, barley, wheat and corn were evaluated and the effects of pre-washing with water, hexane, 100% ethanol or 50% ethanol on flour composition and the amylolysis of starch were studied. Grinding grain to pass through a 0.5 mm sieve effectively released starch granules from endosperm cells. Pre-washing with water or 50% ethanol decreased the protein, phytic acid and total phenolics contents of flours and, except for corn flour, increased starch content. Pre-washing with water reduced the β-glucan content of barley flour by 98%. Pre-washing with hexane or 100% ethanol removed about 80 to 97% of the lipid from the flours. Each of the pre-washings was associated with a significant change, positive or negative, in the extent of α-amylolysis for one or more of the flours. The degree of α-amylolysis in the unwashed flours ranged from 22.4-26.1%, and from 21.6-28.1% in pre-washed flours. Pre-washing of flours increased the degree of hydrolysis achieved with a sequential α-amylase/amyloglucosidase treatment, with values ranging from 61.4-72.8% in pre-washed flours compared to 56.2-57.8% in unwashed flours. The highest degrees of hydrolysis were achieved with 50% ethanol pre-washing at 72.4 and 72.8% for triticale and barley flours, respectively. The degree of α-amylase/amyloglucosidase hydrolysis obtained for isolated starches ranged from 83.7-93.0%. This study clearly demonstrated that the partial removal of non-starch components from whole grain flours by solvent pre-washing enhanced the degree of amylolysis of starch. The presence of phenolics in cereal grain is thought to influence starch amylolysis during liquefaction and saccharification of whole grain flours. To understand amylolysis systems and inhibition mechanisms, the composition and concentration of phenolic acids in whole grain flours of triticale, wheat, barley and corn were analyzed by HPLC. The total phenolic acid contents, representing the sum of 11 phenolic acids in each of the four grains, were 1171, 1732, 1599 and 2331 µg/g, respectively, with more than 76% found in the bound form. Ferulic, coumaric and protocatechuic acids were the major phenolic acids in triticale and wheat. Gallic acid also was rich in triticale. Ferulic, coumaric, hydroxybenzoic, gallic acids and catechinhydrate were predominant in barley. In corn, ferulic, coumaric, gallic, catechinhydrate, naringin, and syringic acids were abundant. Based on these profiles, pure phenolic acids were added individually and collectively…

Subjects/Keywords: starch hydrolysis; bioethanol; phenolic acids; pre-washing; Amylolysis; Non-starch components

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APA (6^th Edition):

Kandil, A. A. (2016). Understanding the Effect of Non-starch Grain Components on the Amylolysis of Starch in Whole Grains. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/c44558d48r

Chicago Manual of Style (16^th Edition):

Kandil, Amin AA. “Understanding the Effect of Non-starch Grain Components on the Amylolysis of Starch in Whole Grains.” 2016. Doctoral Dissertation, University of Alberta. Accessed January 21, 2021. https://era.library.ualberta.ca/files/c44558d48r.

MLA Handbook (7^th Edition):

Kandil, Amin AA. “Understanding the Effect of Non-starch Grain Components on the Amylolysis of Starch in Whole Grains.” 2016. Web. 21 Jan 2021.

Vancouver:

Kandil AA. Understanding the Effect of Non-starch Grain Components on the Amylolysis of Starch in Whole Grains. [Internet] [Doctoral dissertation]. University of Alberta; 2016. [cited 2021 Jan 21]. Available from: https://era.library.ualberta.ca/files/c44558d48r.

Council of Science Editors:

Kandil AA. Understanding the Effect of Non-starch Grain Components on the Amylolysis of Starch in Whole Grains. [Doctoral Dissertation]. University of Alberta; 2016. Available from: https://era.library.ualberta.ca/files/c44558d48r

Loyola University Chicago

7. Frick, Jeffrey A. 4-(Phenylsulfonyl) Butanoic Acid: Preparation, Dianion Generation, and Application to Four Carbon Chain Extension ; Studies of Organophosphorus Compounds Derived from Serine.

Degree: PhD, Chemistry, 1990, Loyola University Chicago

URL: https://ecommons.luc.edu/luc_diss/3163

Subjects/Keywords: Phenolic acids.; Organophosphorus compounds.; Chemistry

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APA (6^th Edition):

Frick, J. A. (1990). 4-(Phenylsulfonyl) Butanoic Acid: Preparation, Dianion Generation, and Application to Four Carbon Chain Extension ; Studies of Organophosphorus Compounds Derived from Serine. (Doctoral Dissertation). Loyola University Chicago. Retrieved from https://ecommons.luc.edu/luc_diss/3163

Chicago Manual of Style (16^th Edition):

Frick, Jeffrey A. “4-(Phenylsulfonyl) Butanoic Acid: Preparation, Dianion Generation, and Application to Four Carbon Chain Extension ; Studies of Organophosphorus Compounds Derived from Serine.” 1990. Doctoral Dissertation, Loyola University Chicago. Accessed January 21, 2021. https://ecommons.luc.edu/luc_diss/3163.

MLA Handbook (7^th Edition):

Frick, Jeffrey A. “4-(Phenylsulfonyl) Butanoic Acid: Preparation, Dianion Generation, and Application to Four Carbon Chain Extension ; Studies of Organophosphorus Compounds Derived from Serine.” 1990. Web. 21 Jan 2021.

Vancouver:

Frick JA. 4-(Phenylsulfonyl) Butanoic Acid: Preparation, Dianion Generation, and Application to Four Carbon Chain Extension ; Studies of Organophosphorus Compounds Derived from Serine. [Internet] [Doctoral dissertation]. Loyola University Chicago; 1990. [cited 2021 Jan 21]. Available from: https://ecommons.luc.edu/luc_diss/3163.

Council of Science Editors:

Frick JA. 4-(Phenylsulfonyl) Butanoic Acid: Preparation, Dianion Generation, and Application to Four Carbon Chain Extension ; Studies of Organophosphorus Compounds Derived from Serine. [Doctoral Dissertation]. Loyola University Chicago; 1990. Available from: https://ecommons.luc.edu/luc_diss/3163

Cornell University

8. Nelson, Rebecca. Compositional And Sensory Analysis Of Finger Lakes Riesling.

Degree: M.S., Food Science and Technology, Food Science and Technology, 2011, Cornell University

URL: http://hdl.handle.net/1813/29464

► As the wine world continues to globalize, and industry competition grows, wine regions have increasingly focused on promoting one or two grape varietals which result… (more)

▼ As the wine world continues to globalize, and industry competition grows, wine regions have increasingly focused on promoting one or two grape varietals which result in consistently expressive wines that best represent the viticultural area. A variety of studies have concentrated on defining regional cultivar typicity not only to enhance marketing techniques, but also to increase the understanding of a specific cultivar within the region from viticultural, enological, and sensorial perspectives, and findings may be relevant to the entire field. The Finger Lakes region of New York State has put itself on the world wine map through production of Rieslings with definitive sensory character. Preliminary assessments also suggest unique sensory profiles exist in the Rieslings according to which Finger Lake the grapes are cultivated. The sensory properties of Finger Lakes Rieslings, and the presence of subregional character, have not previously been investigated through rigorous, formal sensory analysis. This experiment sought to determine whether Riesling grapes grown along Keuka, Seneca, and Cayuga Lakes and from two distinct clones produced wines with unique sensory and compositional profiles. Six similar blocks of Riesling were selected to reduce effects of viticultural practices on compositional and sensory outcomes. Two sites, exclusively planted with clone 90 or clone 239, were selected from the east side of each lake. Viticultural treatments were standardized throughout the growing season. Inherent site and seasonal characteristics were recorded, and specific vine physiology and status measurements were collected from each block. Grapes were vinified, in duplicate lots from each site, by a standard winemaking protocol to yield two fermentation replicates. Instrumental analyses (GC-FID and GC-MS) were performed to quantify selected volatile aroma constituents of the Riesling wines. Generic descriptive analysis (DA) was performed on the wines by eleven panelists, screened for white wine consumption habits and sensory acuity. Sensory reference standards were developed during training and utilized along with intensity standards during orthonasal evaluation of the wines. Wines were also analyzed by HPLC for phenolic acids profiling. Statistical analyses of the volatile data showed that significant differences existed among some compounds. However, most of these differences were likely of no biological significance based on similarity of overall volatile profiles and vineyard site characteristics such as canopy light environment, vine water status, and crop load, factors which may impact wine quality. Monoterpene and TDN levels were at or below sensory threshold, and linalool was the only compound with apparent correlation to sensory data. DA panelists established 11 aroma attributes important to Finger Lakes Riesling wines. Wine aroma profiles were similar across vineyard sites, and two-way ANOVA results of lake, clone, and their interaction were not significant. Citrus, pineapple, linalool/floral, melon, and stemmy… Advisors/Committee Members: Mansfield, Anna K. (chair), Vanden Heuvel, Justine E. (committee member).

Subjects/Keywords: Riesling; descriptive analysis; phenolic acids; aroma chemistry; Finger Lakes

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APA (6^th Edition):

Nelson, R. (2011). Compositional And Sensory Analysis Of Finger Lakes Riesling. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/29464

Chicago Manual of Style (16^th Edition):

Nelson, Rebecca. “Compositional And Sensory Analysis Of Finger Lakes Riesling.” 2011. Masters Thesis, Cornell University. Accessed January 21, 2021. http://hdl.handle.net/1813/29464.

MLA Handbook (7^th Edition):

Nelson, Rebecca. “Compositional And Sensory Analysis Of Finger Lakes Riesling.” 2011. Web. 21 Jan 2021.

Vancouver:

Nelson R. Compositional And Sensory Analysis Of Finger Lakes Riesling. [Internet] [Masters thesis]. Cornell University; 2011. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/1813/29464.

Council of Science Editors:

Nelson R. Compositional And Sensory Analysis Of Finger Lakes Riesling. [Masters Thesis]. Cornell University; 2011. Available from: http://hdl.handle.net/1813/29464

University of Guelph

9. Langfried, Allison. Sensory Perception of Selected Phenolic Acids Found in Whole Grains.

Degree: MS, Department of Food Science, 2013, University of Guelph

URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/7506

► This thesis is an investigation of the sensory attributes of selected phenolic acids found in whole grains. Salivary protein-phenolic acid interactions were investigated using SDS-PAGE… (more)

Subjects/Keywords: Phenolic acids; Ferulic acid; Sensory perception; Astringency; Whole grains; Vanillic acid

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APA (6^th Edition):

Langfried, A. (2013). Sensory Perception of Selected Phenolic Acids Found in Whole Grains. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/7506

Chicago Manual of Style (16^th Edition):

Langfried, Allison. “Sensory Perception of Selected Phenolic Acids Found in Whole Grains.” 2013. Masters Thesis, University of Guelph. Accessed January 21, 2021. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/7506.

MLA Handbook (7^th Edition):

Langfried, Allison. “Sensory Perception of Selected Phenolic Acids Found in Whole Grains.” 2013. Web. 21 Jan 2021.

Vancouver:

Langfried A. Sensory Perception of Selected Phenolic Acids Found in Whole Grains. [Internet] [Masters thesis]. University of Guelph; 2013. [cited 2021 Jan 21]. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/7506.

Council of Science Editors:

Langfried A. Sensory Perception of Selected Phenolic Acids Found in Whole Grains. [Masters Thesis]. University of Guelph; 2013. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/7506

University of Guelph

10. Dupuis, John. Preparation, Physicochemical Properties, and Digestibility of Potato Starch After Inclusion of Gallic and Vanillic Acid.

Degree: MS, Department of Food Science, 2015, University of Guelph

URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9072

► The antioxidants gallic acid vanillic acid are known to have positive effects on the human body, thus they were added to potato starch at 5… (more)

Subjects/Keywords: potato starch; phenolic acids; in vitro digestibility; resistant starch

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APA (6^th Edition):

Dupuis, J. (2015). Preparation, Physicochemical Properties, and Digestibility of Potato Starch After Inclusion of Gallic and Vanillic Acid. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9072

Chicago Manual of Style (16^th Edition):

Dupuis, John. “Preparation, Physicochemical Properties, and Digestibility of Potato Starch After Inclusion of Gallic and Vanillic Acid.” 2015. Masters Thesis, University of Guelph. Accessed January 21, 2021. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9072.

MLA Handbook (7^th Edition):

Dupuis, John. “Preparation, Physicochemical Properties, and Digestibility of Potato Starch After Inclusion of Gallic and Vanillic Acid.” 2015. Web. 21 Jan 2021.

Vancouver:

Dupuis J. Preparation, Physicochemical Properties, and Digestibility of Potato Starch After Inclusion of Gallic and Vanillic Acid. [Internet] [Masters thesis]. University of Guelph; 2015. [cited 2021 Jan 21]. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9072.

Council of Science Editors:

Dupuis J. Preparation, Physicochemical Properties, and Digestibility of Potato Starch After Inclusion of Gallic and Vanillic Acid. [Masters Thesis]. University of Guelph; 2015. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9072

Vytautas Magnus University

11. Maleckienė, Rūta. Rausvažiedės ežiuolės (Echinacea Purpurea (L.) Moench) ekstraktų, gautų skirtingais metodais, palyginimas.

Degree: Master, Chemistry, 2008, Vytautas Magnus University

URL: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2008~D_20080626_143812-69618 ;

►

Rausvažiedė ežiuolė (Echinacea purpurea (L.) Moench) apibūdinama kaip priemonė skatinanti medžiagų apykaitą; stimuliuojanti metabolizmo pakitimus ir ląstelių natūralią gynybą esant lėtinėms ir ūmioms ligoms; antiseptikas;… (more)

▼

Rausvažiedė ežiuolė (Echinacea purpurea (L.) Moench) apibūdinama kaip priemonė skatinanti medžiagų apykaitą; stimuliuojanti metabolizmo pakitimus ir ląstelių natūralią gynybą esant lėtinėms ir ūmioms ligoms; antiseptikas; dezinfekuojantis žaizdas agentas; vaistas. Darbo tikslas buvo atlikti fenolinių junginių analizę rausvažiedės ežiuolės (Echinacea purpurea (L.) Moench) ekstraktuose, gautuose skirtingais metodais, naudojant spektrofotometrinį metodą ir efektyviąją skysčių chromatografiją. Darbo uždaviniai buvo optimizuoti ekstrakcijos sąlygas (maceracijos metodu) įvertinant skirtingas metanolio koncentracijas ir ekstrakcijos trukmės įtaką fenolinių junginių kiekybinei sudėčiai ekstraktuose; paruošti ekstraktus maceracijos, soksleto ir ekstrakcijos superkritiniais skysčiais metodais; optimizuoti efektyviosios skysčių chromatografijos sąlygas; atlikti kokybinę ir kiekybinę fenolinių junginių analizę Rausvažiedės ežiuolės ekstraktuose, įvertinant a) skirtingas ekstraktų paruošimo metodikas; b) skirtingas augalo dalis. Tyrimo metu optimizuotos ekstrakcijos sąlygos (maceracijos metodu); nustatyta, kad daugiausiai fenolinių junginių išekstrahuota naudojant 70 % metanolį per pirmas 4 ekstrakcijos valandas. Paruošti ekstraktai maceracijos, soksleto ir ekstrakcijos superkritiniais skysčiais metodais. Spektrofotometru nustatyta, kad daugiausiai fenolinių junginių išekstrahuojama maceracijos metodu — 3 kartus daugiau nei soksleto metodu ir 14 kartų daugiau nei ekstrakcija... [toliau žr. visą tekstą]

Echinacea purpurea (L.) Moench (family Asteraceae) herbal medicines and dietary supplements are traditionally used as immunostimulants in the treatment of inflammatory and viral diseases. Employed are roots and aerial parts. The main active compounds of Echinacea purpurea (L.) Moench are alkamides and polyacetylenes, caffeic acid derivatives, polysaccharides and glycoproteins. With regard to caffeic acid derivatives, several compounds have been identified from the hydrophilic fractions of Echinacea extracts, such as caftaric acid, chlorogenic acid, caffeic acid and cichoric acid. Cichoric acid is found to be the main phenolic compound in E. purpurea. From the caffeic acid derivatives, only cichoric acid has shown immunostimulatory properties, promoting phagocyte activity in vitro and in vivo. In addition, cichoric acid has antihyaluronidase activity, and has a protective effect on the free-radical-induced degradation of collagen. Cichoric acid has also shown antiviral activity and has recently been found to inhibit HIV-1 integrase and replication. Tasks of investigation: to prepare samples for phenolic acids analysis by supercritical fluid, soxhlet extractions and maceration methods and optimize SPE parameters. Evaluate amount of cichoric acid and compare it in different parts of plant by spectrophotometric method. Optimize HPLC analysis conditions and identify the main phenolic acids by HPLC. Compare amounts of phenolic acids between plant parts and extraction methods.... [to full text]

Advisors/Committee Members: Kornyšova, Olga (Master’s thesis supervisor), Raila, Algirdas (Master’s thesis reviewer).

Subjects/Keywords: Rausvažiedė ežiuolė; Ekstrakcija; Fenolinės rūgštys; Echinacea purpurea; Extraction; Phenolic acids

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APA (6^th Edition):

Maleckienė, Rūta. (2008). Rausvažiedės ežiuolės (Echinacea Purpurea (L.) Moench) ekstraktų, gautų skirtingais metodais, palyginimas. (Masters Thesis). Vytautas Magnus University. Retrieved from http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2008~D_20080626_143812-69618 ;

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

Maleckienė, Rūta. “Rausvažiedės ežiuolės (Echinacea Purpurea (L.) Moench) ekstraktų, gautų skirtingais metodais, palyginimas.” 2008. Masters Thesis, Vytautas Magnus University. Accessed January 21, 2021. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2008~D_20080626_143812-69618 ;.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

Maleckienė, Rūta. “Rausvažiedės ežiuolės (Echinacea Purpurea (L.) Moench) ekstraktų, gautų skirtingais metodais, palyginimas.” 2008. Web. 21 Jan 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

Maleckienė, Rūta. Rausvažiedės ežiuolės (Echinacea Purpurea (L.) Moench) ekstraktų, gautų skirtingais metodais, palyginimas. [Internet] [Masters thesis]. Vytautas Magnus University; 2008. [cited 2021 Jan 21]. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2008~D_20080626_143812-69618 ;.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

Maleckienė, Rūta. Rausvažiedės ežiuolės (Echinacea Purpurea (L.) Moench) ekstraktų, gautų skirtingais metodais, palyginimas. [Masters Thesis]. Vytautas Magnus University; 2008. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2008~D_20080626_143812-69618 ;

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Colorado State University

12. Fulgham, S. Ryan. Insights into the biosphere-atmosphere exchange of organic gases from seasonal observations over a ponderosa pine forest.

Degree: PhD, Chemistry, 2020, Colorado State University

URL: http://hdl.handle.net/10217/211809

► The biosphere-atmosphere exchange of organic gases over forests contributes to the formation of air pollution and the availability of forest nutrients. Forests can be both… (more)

▼ The biosphere-atmosphere exchange of organic gases over forests contributes to the formation of air pollution and the availability of forest nutrients. Forests can be both sources and sinks of volatile and semi-volatile organic compounds to the atmosphere. The role that forests play in controlling organic acid concentrations remains poorly understood, with multiple model-measurement comparisons reporting missing sources of formic acid. Large, missing sources of organic acids have been identified over different forested environments. Despite substantial seasonal variability in forest productivity and environmental conditions, a paucity of observations, during seasons other than summertime, is available. Although forest fires are a major source of hazardous organic gases and particulate matter, few measurements of semi-volatile organic compounds emitted by forest fires are available from within 1 km of the fire. Detection further-afield cannot disambiguate between chemistry at the source of the fire and chemical aging as a smoke plume traverses the atmosphere. Near-field observations are needed to characterize emissions attributable to combustion and pyrolysis processes. To improve understanding of processes that control the atmospheric budgets of organic acids, water-soluble pollutants with physicochemical properties similar to organic acids, and fire-emitted phenolic compounds, this dissertation reports measurements of the biosphere-atmosphere exchange of a suite of organic gases over a Rocky Mountain ponderosa pine forest in Colorado over four, seasonally-representative measurement campaigns. First, we report seasonally persistent, upward fluxes of organic acids, which are neither explained by direct emissions nor secondary production. Second, we present evidence for equilibrium partitioning into and out of water films on forest surfaces as both a missing source and sink of isocyanic acid and small alkanoic acids. Finally, we report significant enhancement of organic acids, phenolic compounds, and other nitrogen containing compounds during initiation of a controlled forest fire compared with the remainder of the burn. Nitrated phenols are rapidly produced and enhanced more than phenolic precursors during initial, higher temperature conditions. We attribute greater enhancement of nitrated phenols to high NOx emissions under higher temperature conditions. Advisors/Committee Members: Farmer, Delphine (advisor), Ham, Jay M. (committee member), Ravishankara, Akkihebbal R. (committee member), Van Orden, Alan (committee member).

Subjects/Keywords: CIMS; organic acids; surface wetness; flux; biosphere-atmosphere exchange; phenolic compounds

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APA (6^th Edition):

Fulgham, S. R. (2020). Insights into the biosphere-atmosphere exchange of organic gases from seasonal observations over a ponderosa pine forest. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/211809

Chicago Manual of Style (16^th Edition):

Fulgham, S Ryan. “Insights into the biosphere-atmosphere exchange of organic gases from seasonal observations over a ponderosa pine forest.” 2020. Doctoral Dissertation, Colorado State University. Accessed January 21, 2021. http://hdl.handle.net/10217/211809.

MLA Handbook (7^th Edition):

Fulgham, S Ryan. “Insights into the biosphere-atmosphere exchange of organic gases from seasonal observations over a ponderosa pine forest.” 2020. Web. 21 Jan 2021.

Vancouver:

Fulgham SR. Insights into the biosphere-atmosphere exchange of organic gases from seasonal observations over a ponderosa pine forest. [Internet] [Doctoral dissertation]. Colorado State University; 2020. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10217/211809.

Council of Science Editors:

Fulgham SR. Insights into the biosphere-atmosphere exchange of organic gases from seasonal observations over a ponderosa pine forest. [Doctoral Dissertation]. Colorado State University; 2020. Available from: http://hdl.handle.net/10217/211809

University of Bradford

13. Talag, Agela Hussain Mohammed. Phytochemical investigation and biological activities of Sanicula europaea and Teucrium davaeanum : isolation and identification of some constituents of Sanicula europaea and Teucrium davaeanum and evaluation of the antioxidant activity of ethanolic extracts of both plants and cytotoxic activity of some isolated compounds.

Degree: PhD, 2016, University of Bradford

URL: http://hdl.handle.net/10454/14482

► The aim of this research was to investigate the phytochemistry of two species Sanicula europaea and Teucrium davaeanum which are traditionally used in treatment of… (more)

Subjects/Keywords: 570; Sanicula; Teucrium; Saponin glycosides; Phenylpropanoids; Phenolic acids; Antioxidant; Cytotoxicity; Phytotoxicity

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APA (6^th Edition):

Talag, A. H. M. (2016). Phytochemical investigation and biological activities of Sanicula europaea and Teucrium davaeanum : isolation and identification of some constituents of Sanicula europaea and Teucrium davaeanum and evaluation of the antioxidant activity of ethanolic extracts of both plants and cytotoxic activity of some isolated compounds. (Doctoral Dissertation). University of Bradford. Retrieved from http://hdl.handle.net/10454/14482

Chicago Manual of Style (16^th Edition):

Talag, Agela Hussain Mohammed. “Phytochemical investigation and biological activities of Sanicula europaea and Teucrium davaeanum : isolation and identification of some constituents of Sanicula europaea and Teucrium davaeanum and evaluation of the antioxidant activity of ethanolic extracts of both plants and cytotoxic activity of some isolated compounds.” 2016. Doctoral Dissertation, University of Bradford. Accessed January 21, 2021. http://hdl.handle.net/10454/14482.

MLA Handbook (7^th Edition):

Talag, Agela Hussain Mohammed. “Phytochemical investigation and biological activities of Sanicula europaea and Teucrium davaeanum : isolation and identification of some constituents of Sanicula europaea and Teucrium davaeanum and evaluation of the antioxidant activity of ethanolic extracts of both plants and cytotoxic activity of some isolated compounds.” 2016. Web. 21 Jan 2021.

Vancouver:

Talag AHM. Phytochemical investigation and biological activities of Sanicula europaea and Teucrium davaeanum : isolation and identification of some constituents of Sanicula europaea and Teucrium davaeanum and evaluation of the antioxidant activity of ethanolic extracts of both plants and cytotoxic activity of some isolated compounds. [Internet] [Doctoral dissertation]. University of Bradford; 2016. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10454/14482.

Council of Science Editors:

Talag AHM. Phytochemical investigation and biological activities of Sanicula europaea and Teucrium davaeanum : isolation and identification of some constituents of Sanicula europaea and Teucrium davaeanum and evaluation of the antioxidant activity of ethanolic extracts of both plants and cytotoxic activity of some isolated compounds. [Doctoral Dissertation]. University of Bradford; 2016. Available from: http://hdl.handle.net/10454/14482

University of Hong Kong

14. Yeung, Shing, Joseph. Role of mycophenolic acid in kidney transplantation.

Degree: 2004, University of Hong Kong

URL: http://hdl.handle.net/10722/25824

Subjects/Keywords: Kidneys - Transplantation.; Phenolic acids - Pharmacokinetics.

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APA (6^th Edition):

Yeung, Shing, J. (2004). Role of mycophenolic acid in kidney transplantation. (Thesis). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/25824

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yeung, Shing, Joseph. “Role of mycophenolic acid in kidney transplantation.” 2004. Thesis, University of Hong Kong. Accessed January 21, 2021. http://hdl.handle.net/10722/25824.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yeung, Shing, Joseph. “Role of mycophenolic acid in kidney transplantation.” 2004. Web. 21 Jan 2021.

Vancouver:

Yeung, Shing J. Role of mycophenolic acid in kidney transplantation. [Internet] [Thesis]. University of Hong Kong; 2004. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10722/25824.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yeung, Shing J. Role of mycophenolic acid in kidney transplantation. [Thesis]. University of Hong Kong; 2004. Available from: http://hdl.handle.net/10722/25824

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Georgia

15. Francisco, Maria Leonora Lotis De Leon. Functional components in peanut skins.

Degree: 2014, University of Georgia

URL: http://hdl.handle.net/10724/25798

► The functionality of peanut skins as a functional food and antioxidant ingredient was studied. The effect of heat treatment on total phenolics, antioxidant capacity (AOC)… (more)

▼ The functionality of peanut skins as a functional food and antioxidant ingredient was studied. The effect of heat treatment on total phenolics, antioxidant capacity (AOC) and concentration of phenolic compounds of peanut skins from Runner, Virginia and Spanish peanut types were analyzed. Heated Runners significantly (P<0.05) contained more total phenolics and had higher AOC values than heated Virginia and Spanish types. Mild heat treatments (<135C, 15 min) further enhanced the antioxidant capacity of raw peanut skins. An improved reversed-phase high performance liquid chromatography method was developed and validated for simultaneous determination of 15 phenolic compounds. Three phenolic acids, 3 flavonoids and 1 stilbene were identified and quantified in all peanut skin extracts from all peanut types. The effect of brewing conditions on the AOC, sensory attributes and consumer preference for peanut skin infusions was evaluated. Peanut skin infusions prepared from all 3 peanut skin types are rich in phenolics and have high AOC, which contributed to the different sensory attributes of the skin infusions. Consumer acceptance was low due to increased intensity in bitterness and astringency. Significant formulation issues in achieving consumer acceptability are needed to deliver beneficial effects to humans in beverage formulations. Storage stability of peanut skin extracts and skins was likewise evaluated. AOC decreased when extracts and skins were stored at different temperatures (23, 30, 35 and 40C) and followed a first order kinetic model. Infusions prepared from stored skins with 50% less AOC revealed minor differences in sensory attributes compared with the control. Finally, the antioxidant effectiveness of peanut skin extracts were evaluated in bulk soybean oil, mayonnaise and cooked, refrigerated beef patty applications. Natural antioxidant activity of peanut skin extract was observed in bulk soybean oil and cooked beef patties but not in mayonnaise. There is substantial evidence that peanut skins are packed with bioactive compounds. Peanut skin extract has antioxidant activity in multiple food systems suggesting that the extract has diverse chemical composition. More efficient use of peanut skins in high value products as dietary antioxidant ingredients and in beverages is encouraged and this will benefit the peanut industry, the economy and human health.

Subjects/Keywords: Peanut skins; phenolic acids; flavonoids; stilbenes; antioxidant capacity; functional compounds

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APA (6^th Edition):

Francisco, M. L. L. D. L. (2014). Functional components in peanut skins. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/25798

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Francisco, Maria Leonora Lotis De Leon. “Functional components in peanut skins.” 2014. Thesis, University of Georgia. Accessed January 21, 2021. http://hdl.handle.net/10724/25798.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Francisco, Maria Leonora Lotis De Leon. “Functional components in peanut skins.” 2014. Web. 21 Jan 2021.

Vancouver:

Francisco MLLDL. Functional components in peanut skins. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10724/25798.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Francisco MLLDL. Functional components in peanut skins. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/25798

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

16. Sun, Luni. Study of Photochemical Formation of Hydroxyl Radical in Natural Waters.

Degree: PhD, Chemistry and Biochemistry, 2015, Old Dominion University

URL: 9781339040851 ; https://digitalcommons.odu.edu/chemistry_etds/4

► This dissertation mainly focuses on the sources of the hydroxyl radical (•OH) from photochemical reactions in natural waters, in particular from reactions involving dissolved… (more)

▼ This dissertation mainly focuses on the sources of the hydroxyl radical (•OH) from photochemical reactions in natural waters, in particular from reactions involving dissolved organic matter (DOM). Firstly, an accurate method for estimating •OH formation rate during long-term irradiation was developed. It was observed that previous methods for measuring •OH formation rates in the natural waters, which were based upon sequentially determined cumulative concentrations of probe photoproducts, significantly underestimated actual •OH formation rates. It was found that the underestimation was mainly due to the degradation of the probe photoproducts and that only ‘instantaneous’ formation rates were appropriate for accurately estimating •OH photochemical formation rates. ‘Instantaneous’ •OH formation rates were obtained by adding probes to a sub-sample at each time point during the long-term irradiation and irradiating the sub-sample for a short time. By employing this approach, •OH formation rates were measured during a photoflocculation study in natural waters. In addition to •OH formation, hydrogen peroxide concentration, dissolved organic carbon, total dissolved nitrogen, water optical properties, and iron speciation were measured. The results showed that in iron- and DOM-rich water samples •OH appears to be mainly produced from the Fenton reaction initially, but subsequently from other sources, in particular DOM photoreactions. In order to elucidate possible photoreaction sites and mechanisms of •OH photoformation from DOM, phenolic compounds were used as model DOM chromophores. •OH quantum yields (Фs) at 280~340 nm were measured by •OH trapping reaction with benzene. It was found that many phenolic acids are capable of producing •OH, especially those with para hydroxyl and carboxyl groups (especially 2,4-dihydroxybenzoate and 4-hydrodroxybenzoate), which have markedly high •OH Фs. By conducting methane trapping and competition kinetics experiments, it was confirmed that free •OH was produced from these compounds. The results suggest that hydroxybenzoic acid moieties within DOM play an important role in the photoproduction of •OH. Finally, it was hypothesized that a quinoid enol tautomer present as a water cluster was responsible for •OH production from phenolic compounds with para hydroxyl and carboxyl groups. Phenolic acids with para hydroxyl and carbonyl groups are common components of lignin, which is a major source of DOM in freshwaters. In order to examine the lignin phenolic composition of natural samples, a simplified method using alkaline copper oxide oxidation coupled with solid-phase extraction and high performance liquid chromatography (HPLC) was developed. In this study, an interlaboratory comparison of the simplified HPLC approach with the conventional, but much more complex and expensive, high pressure reaction vessel GC-MS method was also conducted. The agreement between the two different methods was generally very good. A major benefit of this simplified HPLC method is that it allows… Advisors/Committee Members: Kenneth Mopper, Neil V. Blough, Patrick G. Hatcher, David J. Burdige.

Subjects/Keywords: Hydroxyl radical; Dissolved organic matter; Photoreaction; Phenolic acids; Lignin; Chemistry

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APA (6^th Edition):

Sun, L. (2015). Study of Photochemical Formation of Hydroxyl Radical in Natural Waters. (Doctoral Dissertation). Old Dominion University. Retrieved from 9781339040851 ; https://digitalcommons.odu.edu/chemistry_etds/4

Chicago Manual of Style (16^th Edition):

Sun, Luni. “Study of Photochemical Formation of Hydroxyl Radical in Natural Waters.” 2015. Doctoral Dissertation, Old Dominion University. Accessed January 21, 2021. 9781339040851 ; https://digitalcommons.odu.edu/chemistry_etds/4.

MLA Handbook (7^th Edition):

Sun, Luni. “Study of Photochemical Formation of Hydroxyl Radical in Natural Waters.” 2015. Web. 21 Jan 2021.

Vancouver:

Sun L. Study of Photochemical Formation of Hydroxyl Radical in Natural Waters. [Internet] [Doctoral dissertation]. Old Dominion University; 2015. [cited 2021 Jan 21]. Available from: 9781339040851 ; https://digitalcommons.odu.edu/chemistry_etds/4.

Council of Science Editors:

Sun L. Study of Photochemical Formation of Hydroxyl Radical in Natural Waters. [Doctoral Dissertation]. Old Dominion University; 2015. Available from: 9781339040851 ; https://digitalcommons.odu.edu/chemistry_etds/4

University of Sydney

17. Gillard, Conrad. A novel process for the recovery of phenolic compounds from olive mill wastewater .

Degree: 2016, University of Sydney

URL: http://hdl.handle.net/2123/15964

► Requirements for the treatment of wastewater have grown increasingly stringent in recent years, while industrial processes face increasing competition. As a result, there is a… (more)

Subjects/Keywords: wastewater; olive mill wastewater; polydimethylsiloxane; non-porous membranes; phenolic acids; decarboxylation

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APA (6^th Edition):

Gillard, C. (2016). A novel process for the recovery of phenolic compounds from olive mill wastewater . (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/15964

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gillard, Conrad. “A novel process for the recovery of phenolic compounds from olive mill wastewater .” 2016. Thesis, University of Sydney. Accessed January 21, 2021. http://hdl.handle.net/2123/15964.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gillard, Conrad. “A novel process for the recovery of phenolic compounds from olive mill wastewater .” 2016. Web. 21 Jan 2021.

Vancouver:

Gillard C. A novel process for the recovery of phenolic compounds from olive mill wastewater . [Internet] [Thesis]. University of Sydney; 2016. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/2123/15964.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gillard C. A novel process for the recovery of phenolic compounds from olive mill wastewater . [Thesis]. University of Sydney; 2016. Available from: http://hdl.handle.net/2123/15964

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University

18. Sun, Jingwei (Of Michigan State University). Free and bound phenolic acid contents of Michigan-grown wheat varieties and retention during cookie baking.

Degree: 2015, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:3515

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"Plant phenolic compounds have seen increased interest within the field of cereal science in the recent decade, indicated by the ongoing research in their functional… (more)

Subjects/Keywords: Wheat – Varieties – Michigan; Phenolic acids; Wheat – Varieties; Food science; Chemistry

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APA (6^th Edition):

Sun, J. (. M. S. U. (2015). Free and bound phenolic acid contents of Michigan-grown wheat varieties and retention during cookie baking. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:3515

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sun, Jingwei (Of Michigan State University). “Free and bound phenolic acid contents of Michigan-grown wheat varieties and retention during cookie baking.” 2015. Thesis, Michigan State University. Accessed January 21, 2021. http://etd.lib.msu.edu/islandora/object/etd:3515.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sun, Jingwei (Of Michigan State University). “Free and bound phenolic acid contents of Michigan-grown wheat varieties and retention during cookie baking.” 2015. Web. 21 Jan 2021.

Vancouver:

Sun J(MSU. Free and bound phenolic acid contents of Michigan-grown wheat varieties and retention during cookie baking. [Internet] [Thesis]. Michigan State University; 2015. [cited 2021 Jan 21]. Available from: http://etd.lib.msu.edu/islandora/object/etd:3515.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sun J(MSU. Free and bound phenolic acid contents of Michigan-grown wheat varieties and retention during cookie baking. [Thesis]. Michigan State University; 2015. Available from: http://etd.lib.msu.edu/islandora/object/etd:3515

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Colorado State University

19. Sheflin, Amy Marie. Supplementing powdered high-fiber foods to alter gut microbial metabolism for colorectal cancer prevention.

Degree: PhD, Food Science and Human Nutrition, 2016, Colorado State University

URL: http://hdl.handle.net/10217/176757

► Trillions of microorganisms populate the human digestive tract and enhance immunity, improve digestion and inhibit pathogens when in healthy balance. However, a disruption of gut… (more)

▼ Trillions of microorganisms populate the human digestive tract and enhance immunity, improve digestion and inhibit pathogens when in healthy balance. However, a disruption of gut community balance is associated with a number of diseases including colorectal cancer (CRC). The purpose of this research was to investigate supplementation with two high-fiber foods, heat stabilized rice bran (SRB) and cooked navy bean powder (NBP), for potential to favorably alter the intestinal environment for CRC prevention. Study 1 aimed to assess differences in stool microbiota and associated metabolites in healthy individuals versus those diagnosed with CRC. Next, two pilot dietary interventions were undertaken (Study 2 and 3), one in healthy individuals and another in CRC survivors. Both pilot studies provided diets supplemented with SRB or NBP or macronutrient matched control foods and changes in stool microbiota and associated metabolites were assessed at baseline and after 2 and 4 weeks. The collective body of this research supports the hypothesis that gut microbiota and their metabolites differ with respect to CRC and that intervention with SRB or NBP can alter this profile. Despite similar increases in dietary fiber intake, SRB induced more significant change to gut microbiota and metabolites possibly due to differing chemical composition of plant fibers. Relative to NBP, SRB is rich in arabinoxylans, which structurally mimic the protective mucins lining the intestinal surface. Changes in both microbiota and metabolites observed with SRB supplementation are consistent with enrichment of glycan-foraging bacteria able to switch between dietary glycans (arabinoxylans in this case) and host glycans for energy. Acetate and propionate, potentially beneficial byproducts of microbial fermentation of glycans and other fiber components, increased at 2 weeks in CRC survivors. However, some of the observed changes did not persist at 4 weeks and further research is necessary to determine if more lasting changes are possible with these dietary interventions, as well as whether these altered microbial/metabolite profiles are associated with reduced risk of CRC incidence and recurrence. Advisors/Committee Members: Weir, Tiffany (advisor), Broeckling, Corey (committee member), Melby, Chris (committee member), Pagliassotti, Michael (committee member).

Subjects/Keywords: heat-stabilized rice bran; phenolic acids; stool microbiota; navy bean; bile acids; short chain fatty acids

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sheflin, A. M. (2016). Supplementing powdered high-fiber foods to alter gut microbial metabolism for colorectal cancer prevention. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/176757

Chicago Manual of Style (16^th Edition):

Sheflin, Amy Marie. “Supplementing powdered high-fiber foods to alter gut microbial metabolism for colorectal cancer prevention.” 2016. Doctoral Dissertation, Colorado State University. Accessed January 21, 2021. http://hdl.handle.net/10217/176757.

MLA Handbook (7^th Edition):

Sheflin, Amy Marie. “Supplementing powdered high-fiber foods to alter gut microbial metabolism for colorectal cancer prevention.” 2016. Web. 21 Jan 2021.

Vancouver:

Sheflin AM. Supplementing powdered high-fiber foods to alter gut microbial metabolism for colorectal cancer prevention. [Internet] [Doctoral dissertation]. Colorado State University; 2016. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10217/176757.

Council of Science Editors:

Sheflin AM. Supplementing powdered high-fiber foods to alter gut microbial metabolism for colorectal cancer prevention. [Doctoral Dissertation]. Colorado State University; 2016. Available from: http://hdl.handle.net/10217/176757

Swedish University of Agricultural Sciences

20. Skoglund, Maria. Phenolic compounds in oats.

Degree: 2008, Swedish University of Agricultural Sciences

URL: http://pub.epsilon.slu.se/1687/

► This research project examined how to treat raw oat material for oat-based food products in order to sustain or increase the levels of phenolic compounds.… (more)

▼ This research project examined how to treat raw oat material for oat-based food products in order to sustain or increase the levels of phenolic compounds. The focus was mainly on the avenanthramides, which are potentially health beneficial bioactive components found exclusively in oats. A proposed enzymatic decrease in avenanthramide levels when non heat-treated milled oats are steeped in water was investigated. The decrease was strongly suggested to be caused by a polyphenol oxidase. Although the avenanthramides are only found in oats, the polyphenol oxidase enzyme that acted on avenanthramides was also found to be present in wheat, barley and rye. The effects of a highly controlled steeping and germination process on levels of phenolic compounds and related enzyme activities in oats were studied. The process resulted in increased levels of avenanthramides and some unknown compounds to various extents depending on cultivar. This increase was suggested to be partly due to enzymatically catalysed de novo biosynthesis. Whether germination was the reason behind elevated levels of avenanthramides in one harvest year compared with another, in the same oat genotypes, were investigated. The differences in avenanthramide levels between the two years could not be explained by preharvest sprouting of the oat grains in the field. The content and location of tricin was studied in various oat samples. Tricin was found to be localised to oat hulls and was detected and quantified in a minority of all oat samples analysed. The overall conclusion was that germination of oats can be a good method to sustain or increase avenanthramides and other potentially health beneficial phenolic compounds. It is important to inactivate the polyphenol oxidase present in oats and other cereal grain ingredients included in oat-based food products, since it may otherwise decrease the levels of avenanthramides in these products. Oat hulls may be a good source of tricin if high-tricin cultivars are chosen.

Subjects/Keywords: oats; avena sativa; phenolic compounds; soaking; germination; catechol oxidase; cinnamic acids; avenanthramides; Avena Sativa; germination; hydroxycinnamic acids; oats; phenolic compounds; polyphenol oxidase; tricin

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Skoglund, M. (2008). Phenolic compounds in oats. (Doctoral Dissertation). Swedish University of Agricultural Sciences. Retrieved from http://pub.epsilon.slu.se/1687/

Chicago Manual of Style (16^th Edition):

Skoglund, Maria. “Phenolic compounds in oats.” 2008. Doctoral Dissertation, Swedish University of Agricultural Sciences. Accessed January 21, 2021. http://pub.epsilon.slu.se/1687/.

MLA Handbook (7^th Edition):

Skoglund, Maria. “Phenolic compounds in oats.” 2008. Web. 21 Jan 2021.

Vancouver:

Skoglund M. Phenolic compounds in oats. [Internet] [Doctoral dissertation]. Swedish University of Agricultural Sciences; 2008. [cited 2021 Jan 21]. Available from: http://pub.epsilon.slu.se/1687/.

Council of Science Editors:

Skoglund M. Phenolic compounds in oats. [Doctoral Dissertation]. Swedish University of Agricultural Sciences; 2008. Available from: http://pub.epsilon.slu.se/1687/

21. Regina Lucia Pelachim Lianda. Perfil de Substâncias Fenólicas de Méis Brasileiros por Cromatografia Líquida de Alta Eficiência e Avaliação do Potencial Antioxidante.

Degree: 2009, Universidade Federal Rural do Rio de Janeiro

URL: http://bdtd.ufrrj.br//tde_busca/arquivo.php?codArquivo=996

►

Avaliou-se a atividade antioxidante para quatro amostras de méis silvestres e cinco amostras de méis de laranjeira, cujos resultados se mostraram satisfatórios tanto para os… (more)

▼

Avaliou-se a atividade antioxidante para quatro amostras de méis silvestres e cinco amostras de méis de laranjeira, cujos resultados se mostraram satisfatórios tanto para os méis quanto para seus extratos. Os teores de fenóis totais mostraram-se superiores para os méis heteroflorais (silvestres) em comparação com os homoflorais (laranjeiras). Os teores de flavonóides totais destas amostras não foram tão significativos quanto de fenóis, sugerindo que nos méis brasileiros os ácidos fenólicos são bem mais abundantes que os flavonóides. Os estudos realizados com as diferentes amostras de méis demonstraram que o conteúdo de compostos fenólicos foi mais elevado nos méis silvestres, o que explicaria a maior ação antioxidante, demonstrada pela atividade sequestradora de radical livre (CE50) ter sido observado para essas amostras. Isto poderia fundamentar seu uso como alimento funcional. Este trabalho descreve a identificação de ácidos fenólicos e flavonóides em amostras de méis silvestres, de eucalipto e de laranjeira obtidas de diferentes regiões geográficas. As amostras de méis foram analisadas por CLAE-DAD e UV-visível. Os resultados obtidos indicaram que existe uma grande variação no perfil dos compostos fenólicos nos diversos tipos de méis analisados. A análise do perfil cromatográfico associado ao estudo dos espectros de ultravioleta, permitiu identificar ácidos fenólicos e flavonóides em uma única corrida de 25 minutos. Para as amostras de méis silvestres foram identificados os ácidos protocatecuico, para-hidroxi-benzóico, vanílico, para-cumárico, para-metoxi-benzóico e cinâmico; e os flavonóides morina, quercetina, canferol e isoquercetina. Para as amostras de méis de eucalipto foram identificados os ácidos protocatecuico, para-hidroxi-benzóico e siríngico, além do flavonóide tricetina. E para as amostras de méis de laranjeira foram identificados os ácidos protocatecuico, para-hidroxibenzóico e para-cumárico como os mais representativos, e os flavonóides morina, quercetina, rutina e isoquercetina. Esta foi a primeira vez que os flavonóides isoquercetina e canferol foram relatados em méis brasileiros. Além das análises químicas desenvolvidas nesse trabalho foi realizada também a análise polínica dos méis monoflorais (eucaliptos e laranjeiras), a fim de se poder definir e certificar a sua origem botânica e as suas propriedades. Levando-se em consideração na análise polínica de amostras de mel a participação de pólen anemófilo e polinífero, bem como a relação quantitativa entre o pólen das plantas nectaríferas e suas propriedades, obtém-se um diagnóstico que pode se aproximar da verdadeira procedência do mel.

The evaluation of the antioxidant activity was carried out for four samples of wild honeys and five samples of orange honeys and the results were satisfactory both for the honey samples as well as for their extracts. The total phenolic contents were found to be higher for the wild samples in comparison with the citrus honeys. Total flavonoid content was found to be much less significant than that of phenolics,…

Advisors/Committee Members: Áurea Echevarria Aznar N. Lima, Rosane Nora Castro.

Subjects/Keywords: QUIMICA ORGANICA; phenolic acids, Flavonoids; aqntioxidant activity; ácidos fenólicos; flavonóides; mel; CLAE; atividade antioxidante; honey

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lianda, R. L. P. (2009). Perfil de Substâncias Fenólicas de Méis Brasileiros por Cromatografia Líquida de Alta Eficiência e Avaliação do Potencial Antioxidante. (Thesis). Universidade Federal Rural do Rio de Janeiro. Retrieved from http://bdtd.ufrrj.br//tde_busca/arquivo.php?codArquivo=996

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lianda, Regina Lucia Pelachim. “Perfil de Substâncias Fenólicas de Méis Brasileiros por Cromatografia Líquida de Alta Eficiência e Avaliação do Potencial Antioxidante.” 2009. Thesis, Universidade Federal Rural do Rio de Janeiro. Accessed January 21, 2021. http://bdtd.ufrrj.br//tde_busca/arquivo.php?codArquivo=996.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lianda, Regina Lucia Pelachim. “Perfil de Substâncias Fenólicas de Méis Brasileiros por Cromatografia Líquida de Alta Eficiência e Avaliação do Potencial Antioxidante.” 2009. Web. 21 Jan 2021.

Vancouver:

Lianda RLP. Perfil de Substâncias Fenólicas de Méis Brasileiros por Cromatografia Líquida de Alta Eficiência e Avaliação do Potencial Antioxidante. [Internet] [Thesis]. Universidade Federal Rural do Rio de Janeiro; 2009. [cited 2021 Jan 21]. Available from: http://bdtd.ufrrj.br//tde_busca/arquivo.php?codArquivo=996.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lianda RLP. Perfil de Substâncias Fenólicas de Méis Brasileiros por Cromatografia Líquida de Alta Eficiência e Avaliação do Potencial Antioxidante. [Thesis]. Universidade Federal Rural do Rio de Janeiro; 2009. Available from: http://bdtd.ufrrj.br//tde_busca/arquivo.php?codArquivo=996

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

22. Jardini, Fernanda Archilla. Atividade dos compostos fenólicos antioxidantes da romã (Púnica granatum, L.) – avaliação in vivo e em culturas de células.

Degree: PhD, Bromatologia, 2010, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/9/9131/tde-31052010-150831/ ;

►

Os radicais livres são formados constantemente em nosso organismo, e em quantidades controladas desempenham alguns papéis fisiológicos. Entretanto, sua presença em quantidades acima daquelas aceitáveis… (more)

▼

Os radicais livres são formados constantemente em nosso organismo, e em quantidades controladas desempenham alguns papéis fisiológicos. Entretanto, sua presença em quantidades acima daquelas aceitáveis passa a ser um fator de risco para funcionamento adequado do organismo. Muitas doenças crônicas degenerativas têm sua origem no desequilíbrio do estado redox. Apesar de possuir um sistema de proteção antioxidante endógeno, o organismo pode ser beneficiado pela presença de compostos antioxidantes exógenos, como os compostos fenólicos encontrados em alguns alimentos. A romã (Punica granatum, L) é uma fruta que apresenta elevados conteúdos destes compostos. Foram obtidos os extratos e as frações de ácidos fenólicos da polpa e das sementes da fruta, e avaliou-se a capacidade antioxidante através de três métodos in vitro: o de co-oxidação de substratos (β- caroteno e ácido linoléico), o do radical DPPH• e o ORAC. Em todos os testes foram obtidos resultados que indicaram uma elevada atividade antioxidante, principalmente para a fração de ácidos fenólicos livres (AFL) da polpa. Frente a estes dados, a fração foi submetida a um ensaio de transporte celular, o qual foi possível verificar que os diferentes ácidos fenólicos ali encontrados foram capazes de atravessar a membrana celular. A fração AFL da polpa propiciou uma redução na produção de espécies reativas intracelulares e efeitos sobre a proliferação e a viabilidade em células das linhagens Caco-2, HeLa e MDCK. Por fim, o ensaio in vivo avaliou, sob condições fisiológicas normais, o efeito do extrato aquoso e da fração AFL sobre a oxidação lipídica e na atividade do sistema enzimático de defesa antioxidante. O tecido cerebral apresentou uma redução significativa nos níveis de lipoperoxidação. A atividade das enzimas superóxido dismutase, catalase e glutationa peroxidase apresentou resultados bastante díspares e sugerem que as respostas não seguem um padrão único e podem variar de acordo com o órgão analisado, respondendo com o aumento ou a diminuição da atividade enzimática de acordo com suas funções fisiológicas.

Free radicals are continuosly formed in our organism, and under suitable amounts they play physiological roles. However, when there´s a higher presence in their levels than the acceptable ones, they turn into a risk factor to the adequate work of the organism. Most of the degenerative illness are originated from the redox state desequilibrium. Although the organism has an endogenous antioxidant defence system, it may be beneficiated by the presence of antioxidant compounds of exogenous origen, as the phenolic compounds that are found in some kinds of food. The pomegranate (Punica grantum, L.) is a high phenolic compound fruit. The extracts and phenolic fractions both from the pulp and seeds of the fruit were obtained and their antioxidant activity was obtained using three in vitro methods: the co-oxidation of substrates (β-carotene and linoleic acid), the DPPH• radical and the ORAC. For all of them the results have showed a great…

Advisors/Committee Members: Mancini Filho, Jorge.

Subjects/Keywords: Ácidos Fenólicos; Antioxidant; Antioxidantes; Cell Culture; Cultura de Células; Phenolic Acids; Pomegranate; Romã

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jardini, F. A. (2010). Atividade dos compostos fenólicos antioxidantes da romã (Púnica granatum, L.) – avaliação in vivo e em culturas de células. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/9/9131/tde-31052010-150831/ ;

Chicago Manual of Style (16^th Edition):

Jardini, Fernanda Archilla. “Atividade dos compostos fenólicos antioxidantes da romã (Púnica granatum, L.) – avaliação in vivo e em culturas de células.” 2010. Doctoral Dissertation, University of São Paulo. Accessed January 21, 2021. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-31052010-150831/ ;.

MLA Handbook (7^th Edition):

Jardini, Fernanda Archilla. “Atividade dos compostos fenólicos antioxidantes da romã (Púnica granatum, L.) – avaliação in vivo e em culturas de células.” 2010. Web. 21 Jan 2021.

Vancouver:

Jardini FA. Atividade dos compostos fenólicos antioxidantes da romã (Púnica granatum, L.) – avaliação in vivo e em culturas de células. [Internet] [Doctoral dissertation]. University of São Paulo; 2010. [cited 2021 Jan 21]. Available from: http://www.teses.usp.br/teses/disponiveis/9/9131/tde-31052010-150831/ ;.

Council of Science Editors:

Jardini FA. Atividade dos compostos fenólicos antioxidantes da romã (Púnica granatum, L.) – avaliação in vivo e em culturas de células. [Doctoral Dissertation]. University of São Paulo; 2010. Available from: http://www.teses.usp.br/teses/disponiveis/9/9131/tde-31052010-150831/ ;

Universidade Estadual de Campinas

23. Lima, Fabíola Aliaga de, 1984-. Estudo da biotransformação da farinha de centeio por tratamento enzimático e avaliação da bioacessibilidade de ácidos fenólicos pelo modelo de digestão 'in vitro' e de absorção por células intestinais Caco-2: Study of biotransformation of rye flour by enzymatic treatment and evaluation of the bioaccessibility of phenolic acids by model of digestion 'in vitro' and of absorption by Caco-2 intestinal cells.

Degree: 2015, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/256639

► Abstract: Phenolic acids have biological properties that perform antioxidant, anti-inflammatory, antiproliferative and antimicrobial. However, these phenolic of whole grains may be difficult to be completely… (more)

▼ Abstract: Phenolic acids have biological properties that perform antioxidant, anti-inflammatory, antiproliferative and antimicrobial. However, these phenolic of whole grains may be difficult to be completely absorbed by the body because they are connected to other cell wall components of plant or an antinutrient (tannins). Zinc, iron and phosphorus of whole grains are important for the development and maintenance of the organism. However, cereals rich in phytate may have these minerals complexed to antinutrient and become unavailable for absorption. An alternative to improve the availability of phenolic acids and minerals of whole grains is the enzymatic treatment. Tannase, tannin acyl hydrolase (EC 3.1.1.20) is an enzyme with the ability to act on ester bonds and depside bonds of hydrolysable tannins and has been described as capable of hydrolyzing tannic acid, chlorogenic acid, epigallocatechin, among others. Microbial phytase acts on dephytinization of cereals rich in phytate and its action improves the bioaccessibility of iron and zinc in infant formulation. Bioaccessibility is an alternative to in vivo tests that has expensive experimental cost, and can be measured by 'in vitro' model of digestion / absorption by the Caco-2 cells. The aim of this study was to investigate the effect of tannase Paecilomyces variotii and of commercial phytase added to rye flour, as to the total phenolic content and the identification and quantification by HPLC-DAD of phenolic acids; to the antioxidant capacity (DPPH, ORAC and FRAP); to the availability of minerals (zinc and iron); to the antinutrients content (phytate and hydrolyzable tannin); and as to bioaccessibility of phenolic acids of the flour. Tannase added to flour was able to reduce the hydrolyzable tannin content, increase total phenolic and enhance the antioxidant capacity. Flour rye treated with phytase decreased phytate content and increased content of inorganic phosphorus from enzymatic degradation. Availability of zinc and iron of the flour after treatment with phytase was improved, it was measured by the molar ratio between the mineral and phytate. Acids ferulic, sinapic and vanillic were identified and quantified of the rye flour, which after treatment with tannase showed an increase in ferulic acid content in five times bigger that the untreated flour. This result shows the tanase being an original action of 'P. variotii' as possible feruloyl esterase. Biotransformed flour rye with tannase showed a higher content of vanillic acid, ferulic and sinapic, however, when assessing the bioaccessibility was lower transport efficiency of these acids when compared to the control flour. Probably the biotransformed flour showed saturation of these phenolics about the apical portion of Caco-2 cells, they reduced the capacity of the monocarboxylic acids transporter (MCT1) within two hours of incubation. This corroborates the results of exposure of Caco-2 cells to standards of ferulic acid and vanillic at concentration of 50 ?l.mL-1, that showed inhibition of gene expression… Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Macedo, Gabriela Alves, 1971- (advisor), Universidade Estadual de Campinas. Faculdade de Engenharia de Alimentos (institution), Programa de Pós-Graduação em Ciência de Alimentos (nameofprogram), Battestin, Vânia (committee member), Netto, Flavia Maria (committee member), Calhau, Maria da Conceição Costa Pinho (committee member), Pallone, Juliana Azevedo Lima (committee member).

Subjects/Keywords: Centeio; Biotransformação; Minerais; Compostos fenólicos; Bioacessibilidade; Rye (Secale cereale L.); Biotransformation; Minerals; Phenolic acids; Bioaccessibility

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lima, Fabíola Aliaga de, 1. (2015). Estudo da biotransformação da farinha de centeio por tratamento enzimático e avaliação da bioacessibilidade de ácidos fenólicos pelo modelo de digestão 'in vitro' e de absorção por células intestinais Caco-2: Study of biotransformation of rye flour by enzymatic treatment and evaluation of the bioaccessibility of phenolic acids by model of digestion 'in vitro' and of absorption by Caco-2 intestinal cells. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/256639

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lima, Fabíola Aliaga de, 1984-. “Estudo da biotransformação da farinha de centeio por tratamento enzimático e avaliação da bioacessibilidade de ácidos fenólicos pelo modelo de digestão 'in vitro' e de absorção por células intestinais Caco-2: Study of biotransformation of rye flour by enzymatic treatment and evaluation of the bioaccessibility of phenolic acids by model of digestion 'in vitro' and of absorption by Caco-2 intestinal cells.” 2015. Thesis, Universidade Estadual de Campinas. Accessed January 21, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256639.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lima, Fabíola Aliaga de, 1984-. “Estudo da biotransformação da farinha de centeio por tratamento enzimático e avaliação da bioacessibilidade de ácidos fenólicos pelo modelo de digestão 'in vitro' e de absorção por células intestinais Caco-2: Study of biotransformation of rye flour by enzymatic treatment and evaluation of the bioaccessibility of phenolic acids by model of digestion 'in vitro' and of absorption by Caco-2 intestinal cells.” 2015. Web. 21 Jan 2021.

Vancouver:

Lima, Fabíola Aliaga de 1. Estudo da biotransformação da farinha de centeio por tratamento enzimático e avaliação da bioacessibilidade de ácidos fenólicos pelo modelo de digestão 'in vitro' e de absorção por células intestinais Caco-2: Study of biotransformation of rye flour by enzymatic treatment and evaluation of the bioaccessibility of phenolic acids by model of digestion 'in vitro' and of absorption by Caco-2 intestinal cells. [Internet] [Thesis]. Universidade Estadual de Campinas; 2015. [cited 2021 Jan 21]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/256639.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lima, Fabíola Aliaga de 1. Estudo da biotransformação da farinha de centeio por tratamento enzimático e avaliação da bioacessibilidade de ácidos fenólicos pelo modelo de digestão 'in vitro' e de absorção por células intestinais Caco-2: Study of biotransformation of rye flour by enzymatic treatment and evaluation of the bioaccessibility of phenolic acids by model of digestion 'in vitro' and of absorption by Caco-2 intestinal cells. [Thesis]. Universidade Estadual de Campinas; 2015. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/256639

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Estadual de Campinas

24. Oliveira Alves, Sheila Cristina de, 1977-. Avaliação dos efeitos antioxidantes, hipocolesterolêmico e antitumoral da semente e óleo de chia: Evaluation of antioxidant, hypocholesterolemic and antitumoral effects of the chia seed and oil.

Degree: 2017, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/325737

► Abstract: Chia seed is an important source of lipids and phenolic compounds, and its oil has high level of 'alpha'-linolenic acid. The methanolic extracts corresponding… (more)

▼ Abstract: Chia seed is an important source of lipids and phenolic compounds, and its oil has high level of 'alpha'-linolenic acid. The methanolic extracts corresponding to the chia seed, fiber flour and oil were analyzed, and the main phenolic compounds identified in extracts were the caffeic acid and danshensu, and danshensu derivatives, such as rosmarinic acid and salvianolic acid. The effects of dietary intake containing 7 % chia oil, 20 % chia seed and 20 % chia fiber flour were evaluated for serum levels of total cholesterol and fatty acid profile in the hepatic tissue of healthy Balb/C mice. Mice consuming 7 % oil and 20 % seed showed a significant reduction in serum levels of total cholesterol, 19.76 % and 12.88 %, respectively. The composition of the fatty acids in the hepatic tissues of the animals presented significantly high 'alpha'-linolenic acid content for the groups that consumed a chia seed and oil diet. The effects of dietary consumption by male Balb/C mice, containing 10 %, 15 % and 20 % of chia seed and fiber flour , and diet containing 5 %, 6 % and 7 % of chia oil, were evaluated in a solid tumor model of Ehrlich in the period of 56 days. The animals treated with diets containing 10 %, 15 % and 20 % chia seed and 20 % chia fiber flour presented an average reduction of 24 % of the tumor mass. Additionally, the consumption of chia oil in the diet significantly reduced tumor mass growth in the Ehrlich solid tumor model. The consumption of diets with 5 %, 6 % and 7 % of chia oil presented an average reduction of 55 % of the tumor mass. The animals treated with the oil-containing diets presented lower tumors and the antitumor activity was similar to that of the chemotherapeutic doxorubicin. Despite the potent antitumor action, the daily consumption of chia oil did not promote signs of toxicity, unlike the doxorubicin group, which presented changes in hematological parameters. This study provides new information on the major phenolic acids present in chia seeds, which are important sources of natural antioxidants. Seed and chia oil are an important source of omega 3 fatty acids and an alternative of intake to contribute in the reduction of the serum levels of total cholesterol. The consumption of chia seed in the diet, especially containing 10 %, 15 % and 20 % of seed, and 5 % , 6 % and 7 % of chia oil, presented potential preventive action on the growth of tumors, and both had no side effects in mice. One of the major challenges in cancer control is the search for new preventive agents, chia seed and oil, certainly represent a potential to be explored and future studies should be carried out to confirm its potential preventive in chronic models of carcinogenesis Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Prado, Marcelo Alexandre, 1966- (advisor), Costa, Débora Barbosa Vendramini, 1984- (coadvisor), Universidade Estadual de Campinas. Faculdade de Engenharia de Alimentos (institution), Programa de Pós-Graduação em Ciência de Alimentos (nameofprogram), Xavier, Ana Augusta Odorissi (committee member), Cazarin, Cínthia Baú Betim, (committee member), Azevedo, Luciana (committee member), Alencar, Severino Matias de (committee member).

Subjects/Keywords: Chia; Compostos fenólicos; Ácidos graxos; Colesterol; Câncer; Chia; Phenolic compounds; Fatty acids; Cholesterol; Cancer

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Oliveira Alves, Sheila Cristina de, 1. (2017). Avaliação dos efeitos antioxidantes, hipocolesterolêmico e antitumoral da semente e óleo de chia: Evaluation of antioxidant, hypocholesterolemic and antitumoral effects of the chia seed and oil. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/325737

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Oliveira Alves, Sheila Cristina de, 1977-. “Avaliação dos efeitos antioxidantes, hipocolesterolêmico e antitumoral da semente e óleo de chia: Evaluation of antioxidant, hypocholesterolemic and antitumoral effects of the chia seed and oil.” 2017. Thesis, Universidade Estadual de Campinas. Accessed January 21, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/325737.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Oliveira Alves, Sheila Cristina de, 1977-. “Avaliação dos efeitos antioxidantes, hipocolesterolêmico e antitumoral da semente e óleo de chia: Evaluation of antioxidant, hypocholesterolemic and antitumoral effects of the chia seed and oil.” 2017. Web. 21 Jan 2021.

Vancouver:

Oliveira Alves, Sheila Cristina de 1. Avaliação dos efeitos antioxidantes, hipocolesterolêmico e antitumoral da semente e óleo de chia: Evaluation of antioxidant, hypocholesterolemic and antitumoral effects of the chia seed and oil. [Internet] [Thesis]. Universidade Estadual de Campinas; 2017. [cited 2021 Jan 21]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/325737.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Oliveira Alves, Sheila Cristina de 1. Avaliação dos efeitos antioxidantes, hipocolesterolêmico e antitumoral da semente e óleo de chia: Evaluation of antioxidant, hypocholesterolemic and antitumoral effects of the chia seed and oil. [Thesis]. Universidade Estadual de Campinas; 2017. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/325737

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

25. Mellina Damasceno Rachid Santos. Desenvolvimento de método cromatográfico (HPLC-UV) para a determinação de ácidos fenólicos extraídos por ultra-som de forrageiras tropicais.

Degree: 2009, Universidade Federal de Juiz de Fora

URL: http://www.bdtd.ufjf.br/tde_busca/arquivo.php?codArquivo=544

►

O desempenho dos bovinos em regime de pastejo pode ser melhorado com o aumento da digestibilidade da forrageira. Os ácidos p-cumárico e ferúlico estão associados… (more)

▼

O desempenho dos bovinos em regime de pastejo pode ser melhorado com o aumento da digestibilidade da forrageira. Os ácidos p-cumárico e ferúlico estão associados aos componentes da parede celular através de ligações éster ou éter, podendo influenciar negativamente na digestibilidade das forrageiras. O presente trabalho propõe uma metodologia de extração com ultra-som e separação por HPLC dos ácidos ferúlico, p-cumárico, m-cumárico, o-cumárico, cafeico e ácido chiquímico, e a quantificação dos ácidos ferúlico e p-cumárico éster ligados em forrageiras tropicais. A metodologia de análise foi desenvolvida em um cromatógrafo líquido de alta eficiência com detecção absorciométrica no UV e coluna de fase reversa C-18. Composição e pH da fase móvel, programação dos comprimentos de onda de detecção foram parâmetros estudados na otimização do método. No estudo da composição da fase móvel, foram testados diferentes solventes orgânicos e soluções aquosas em diferentes valores de pH, onde a melhor condição foi obtida com eluição isocrática usando como fase móvel acetonitrila/metanol/solução aquosa H3PO4 pH 2,05 (13:12,5:74,5). A fim de se diminuir o tempo do processo de tratamento das amostras, foi estudada a extração empregando o ultra-som, que se mostrou um processo mais rápido e reprodutível se comparado com a extração em banho ultratermostático. Foi feita a avaliação do método aplicando padronização externa e padronização interna. A padronização interna usando o ácido mcumárico como padrão surrogate e o ácido o-cumárico como padrão interno, produziu bons resultados, dentre eles limites de detecção de 0,09 e 0,04 mg/L para os ácidos p-cumárico e ferúlico, respectivamente, e valores de recuperação que variaram de 83 a 99 %. Sendo assim, a metodologia implementada foi aplicada a análise de 43 amostras de forrageiras, fornecidas pela Embrapa Gado de Leite, de quatro espécies: Cynodon nlemfuenses cv. Florona, Cynodon dactylon cv. Florakirk, Panicum maximum cv. Mombaça e Brachiaria brizantha cv. Marandu. Foram analisadas as frações caule e folha, cujas faixas de valores encontrados foram de 3,63 a 9,04 mg/g peso seco para o ácido p-cumárico e 3,35 a 7,69 mg/g peso seco para o ácido ferúlico

Livestock performance can be improved by increasing the digestibility of forage. The p-coumaric acid and ferulic acid are associated with the components of the cell wall by linking ester or ether, which can negatively influence the digestibility of forage. This paper proposes a method for ultrasound based extraction and separation by HPLC for ferulic acid, p-coumaric acid, m-coumaric acid, ocoumaric acid, caffeic acid and shikimic acid, and quantification of ferulic acid and p-coumaric acid ester linked to cell wall in samples of tropical forages. The method of analysis was optimized in a high performance liquid chromatography with UV-VIS detector MWD and a reverse-phase column C-18. Composition and pH of the mobile phase and wavelengths of detection were parameters studied in the optimization of the method. In the study of the composition of…

Advisors/Committee Members: Maria Auxiliadora Costa Matos, Patrícia Benedini Martelli, Jailton da Costa Carneiro, Ricardo Queiroz Aucélio.

Subjects/Keywords: Ácidos fenólicos; Forrageiras; QUIMICA; Ultra-som; HPLC; Forage; Phenolic acids; Ultrasound; HPLC

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APA (6^th Edition):

Santos, M. D. R. (2009). Desenvolvimento de método cromatográfico (HPLC-UV) para a determinação de ácidos fenólicos extraídos por ultra-som de forrageiras tropicais. (Thesis). Universidade Federal de Juiz de Fora. Retrieved from http://www.bdtd.ufjf.br/tde_busca/arquivo.php?codArquivo=544

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Santos, Mellina Damasceno Rachid. “Desenvolvimento de método cromatográfico (HPLC-UV) para a determinação de ácidos fenólicos extraídos por ultra-som de forrageiras tropicais.” 2009. Thesis, Universidade Federal de Juiz de Fora. Accessed January 21, 2021. http://www.bdtd.ufjf.br/tde_busca/arquivo.php?codArquivo=544.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Santos, Mellina Damasceno Rachid. “Desenvolvimento de método cromatográfico (HPLC-UV) para a determinação de ácidos fenólicos extraídos por ultra-som de forrageiras tropicais.” 2009. Web. 21 Jan 2021.

Vancouver:

Santos MDR. Desenvolvimento de método cromatográfico (HPLC-UV) para a determinação de ácidos fenólicos extraídos por ultra-som de forrageiras tropicais. [Internet] [Thesis]. Universidade Federal de Juiz de Fora; 2009. [cited 2021 Jan 21]. Available from: http://www.bdtd.ufjf.br/tde_busca/arquivo.php?codArquivo=544.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Santos MDR. Desenvolvimento de método cromatográfico (HPLC-UV) para a determinação de ácidos fenólicos extraídos por ultra-som de forrageiras tropicais. [Thesis]. Universidade Federal de Juiz de Fora; 2009. Available from: http://www.bdtd.ufjf.br/tde_busca/arquivo.php?codArquivo=544

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

26. Vaitūnaitytė, Malvina. Fenolinių junginių kokybinės ir kiekybinės sudėties įvairavimo šermukšnių (S. aucuparia l.) lapuose ir žieduose tyrimas.

Degree: Master, Pharmacy, 2014, Lithuanian Academic Libraries Network (LABT)

URL: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140630_134222-34665 ;

►

Tyrimo objektas ir metodai: Sorbus L. genties augalo S. aucuparia L. lapų ir žiedų tyrimas. Bendras fenolinių junginių kiekis paprastojo šermukšnio augalinėse žaliavose nustatytas UV… (more)

▼

Tyrimo objektas ir metodai: Sorbus L. genties augalo S. aucuparia L. lapų ir žiedų tyrimas. Bendras fenolinių junginių kiekis paprastojo šermukšnio augalinėse žaliavose nustatytas UV spektrofotometriniu metodu, fenolinės rūgštys ir flavonoidai nustatyti ESC metodu. Darbo tikslas: nustatyti S. aucuparia L. lapuose ir žieduose esančius fenolinius junginius, jų kiekinės sudėties įvairavimą augalo vegetacijos metu ir augalinių žaliavų (lapų ir žiedų) laikymo metu. Darbo uždaviniai: Surinkti ir susisteminti literatūros duomenis apie Sorbus aucuparia L., paprastojo šermukšnio augalinių žaliavų cheminę sudėtį, fenolinių junginių analizės metodus, poveikį ir panaudojimą medicinos praktikoje; Ištirti S. aucuparia L. lapų ir žiedų kiekybinę fenolinių junginių sudėtį ir nustatyti bendro fenolinių junginių kiekio įvairavimą augalo vegetacijos metu; Ištirti S. aucuparia L. lapų ir žiedų kokybinę ir kiekybinę fenolinių rūgščių ir flavonoidų sudėtį ir nustatyti jų kiekinės sudėties kitimą augalų vegetacijos periodo metu; Nustatyti S. aucuparia L. lapuose ir žieduose esančių fenolinių junginių kiekybinės sudėties kitimus augalinių žaliavų laikymo metu. Išvados: S. aucuparia L. augalinės žaliavos gali būti kaip šaltinis išskiriant biologiškai aktyvius junginius, kurie gali būti naudojami medicinos praktikoje. S. aucuparia L. lapuose ir žieduose esančių junginių kiekis kinta augalo vegetacijos metu; lapuose daugiausia fenolinių junginių sukaupiama gegužės - birželio mėn., žieduose – žydėjimo... [toliau žr. visą tekstą]

Object and methods: Sorbus aucuparia L. leaves and flowers study. Total amaunt of phenolic compounds in mountain ash leaves and flowers were evaluated using UV spectrophotometry, phenolic acids and flavonoids were identified and evaluated using HPLC. Aim: to identify and evaluate the content of phenolic compounds in rowan leaves and flowers during mountain ash vegetation and during plant materials (leaves and flowers) storage. Objective: to collect and organise the information about the use of Sorbus aucuparia L., S. aucuparia L. leaves and flowers acumulated compounds, phenolic compounds analysis methods and the impact of the use in medical practice; to perform quantitative analysis of S. aucuparia L. leaves and flowers phenolic compounds and to determine the total phenolics content during rowan growing season; to perform qualitative and quantitative analysis of S. aucuparia L. leaves and flowers phenolic acids and flavonoids and to determine the variation of the phenolics content during rowan growing season; to determine phenolic compounds content changes in Sorbus aucuparia L. plant materials (flowers and leaves) during them storage. Conclusions: S. aucuparia L. leaves and flower is a source of biological active substances which can be used in medicinal practice. Phenolic compounds content in S. aucuparia L. leaves and flowers change during vegetation; mainly phenolic compounds in leaves was accumulated in May - June, in flowers - in the beginning of flowering and massive... [to full text]

Advisors/Committee Members: Janulis, Valdimaras (Master’s thesis supervisor), Marksienė, Rūta (Master’s thesis reviewer), Savickienė, Nijolė (Master’s degree committee chair), Ivanauskas, Liudas (Master’s degree committee member), Savickas, Arūnas (Master’s degree committee member), Briedis, Vitalis (Master’s degree committee member), Jakštas, Valdas (Master’s degree committee member), Drakšienė, Gailutė (Master’s degree committee member), Ramanauskienė, Kristina (Master’s degree committee member), Inkėnienė, Asta Marija (Master’s degree committee member), Radžiūnas, Raimondas (Master’s degree committee member), Skyrius, Vaidas (Master’s degree committee member), Barsteigienė, Zita (Master’s degree committee member), Brusokas, Valdemaras (Master’s degree committee member), Ževžikovas, Andrejus (Master’s degree committee member), Vitkevičius, Konradas (Master’s degree committee member), Gumbrevičius, Gintautas (Master’s degree committee member), Ragažinskienė, Ona (Master’s degree committee member), Maruška, Audrius (Master’s degree committee member), Martinėnas, Žydrūnas (Master’s degree committee member), Kuncaitė, Giedrė (Master’s degree committee member), Jakubauskas, Mindaugas (Master’s degree committee member), Budrikienė, Aušra (Master’s degree committee member), Švarcaitė, Jūratė (Master’s degree committee member), Marcinkevičienė, Rasa (Master’s degree committee member), Balanaškienė, Rima (Master’s degree committee member), Zulanienė, Eglė Audronė (Master’s degree committee member).

Subjects/Keywords: Sorbus; Flavonoidai; Fenolinės rūgštys; ESC; Spektrofotometrija; Sorbus; Flavonoids; Phenolic acids; High-performance liquid chromatography; Spectrophotometry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Vaitūnaitytė, Malvina. (2014). Fenolinių junginių kokybinės ir kiekybinės sudėties įvairavimo šermukšnių (S. aucuparia l.) lapuose ir žieduose tyrimas. (Masters Thesis). Lithuanian Academic Libraries Network (LABT). Retrieved from http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140630_134222-34665 ;

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

Vaitūnaitytė, Malvina. “Fenolinių junginių kokybinės ir kiekybinės sudėties įvairavimo šermukšnių (S. aucuparia l.) lapuose ir žieduose tyrimas.” 2014. Masters Thesis, Lithuanian Academic Libraries Network (LABT). Accessed January 21, 2021. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140630_134222-34665 ;.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

Vaitūnaitytė, Malvina. “Fenolinių junginių kokybinės ir kiekybinės sudėties įvairavimo šermukšnių (S. aucuparia l.) lapuose ir žieduose tyrimas.” 2014. Web. 21 Jan 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

Vaitūnaitytė, Malvina. Fenolinių junginių kokybinės ir kiekybinės sudėties įvairavimo šermukšnių (S. aucuparia l.) lapuose ir žieduose tyrimas. [Internet] [Masters thesis]. Lithuanian Academic Libraries Network (LABT); 2014. [cited 2021 Jan 21]. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140630_134222-34665 ;.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

Vaitūnaitytė, Malvina. Fenolinių junginių kokybinės ir kiekybinės sudėties įvairavimo šermukšnių (S. aucuparia l.) lapuose ir žieduose tyrimas. [Masters Thesis]. Lithuanian Academic Libraries Network (LABT); 2014. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140630_134222-34665 ;

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

27. Gaivelytė, Kristina. Šermukšnio (Sorbus L.) genties augalų fenolinių junginių tyrimas.

Degree: Dissertation, Pharmacy, 2014, Lithuanian Academic Libraries Network (LABT)

URL: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140904_150010-61599 ;

►

Sorbus L. gentis yra plačiai paplitusi pasaulyje. Šermukšnio genties augalų augalinės žaliavos fitocheminė sudėtis tiriama pasaulio mokslininkų, tačiau duomenys apie galimą fenolinių junginių įvairavimą yra… (more)

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Sorbus L. gentis yra plačiai paplitusi pasaulyje. Šermukšnio genties augalų augalinės žaliavos fitocheminė sudėtis tiriama pasaulio mokslininkų, tačiau duomenys apie galimą fenolinių junginių įvairavimą yra nepakankami. Siekiant ištirti Lietuvoje natūraliai augančių ir auginamų kolekcijose šermukšnių (Sorbus L.) rūšių ir veislių lapų, žiedų ir vaisių flavonoidų ir fenolinių rūgščių kokybinės ir kiekinės sudėties įvairavimą, optimizuota efektyviosios skysčių chromatografijos (ESC) metodika. Ištirta paprastųjų šermukšnių (S. aucuparia L.) lapų, žiedų ir vaisių ėminių flavonoidų ir fenolinių rūgščių kokybinė ir kiekinė sudėtis bei nustatyti įvairavimo ypatumai augalo vegetacijos periodo metu. Ištirta Lietuvoje natūraliose augavietėse augančių S. aucuparia L. lapų ėminių flavonoidų ir fenolinių rūgščių kokybinė ir kiekinė sudėtis. Nustatyta kolekcijose auginamų Sorbus L. genties rūšių ir veislių augalų flavonoidų ir fenolinių rūgščių kokybinė ir kiekinė sudėtis bei jų kaupimosi dėsningumai. Atlikti Sorbus L. genties rūšių ir veislių vaisių fenolinių junginių antioksidacinio aktyvumo tyrimai taikant pokolonėlinės reakcijos metodą, nustatytas ryšys tarp fenolinių junginių kiekio šermukšnių vaisiuose ir antioksidacinio aktyvumo.

Sorbus L. genus is widespread in the world. In the course of research carried out in various countries, analysis of the phytochemical composition of Sorbus L. species has been performed, however, information about possible variation of phenolic compounds is insufficient. In order to investigate qualitative and quantitative composition of phenolic acids and flavonoids in leaves, inflorescences and fruits of Sorbus L. growing in natural habitats and grown in collection in Lithuania HPLC method was developed. Variation patterns of the contents of phenolic compounds flavonoids in leaves, inflorescences and fruits of S. aucuparia L. during the growth season were determined. Qualitative and quantitative composition of phenolic acids and flavonoids in leaves of S. aucuparia L. growing in natural habitats in Lithuania was investigated. Qualitative and quantitative composition of phenolic acids and flavonoids of species and varieties of genus Sorbus L. plants, grown in collections, was investigated. Antioxidant activity of fruits of species and varieties of genus Sorbus L. was investigated applying postcolumn HPLC method and relationship between the amount of phenolic compounds and antioxidant activity was revealed.

Advisors/Committee Members: Janulis, Valdimaras (Doctoral dissertation supervisor), Ramanauskienė, Kristina (Doctoral dissertation committee chair), Ivanauskas, Liudas (Doctoral dissertation committee member), Liesienė, Jolanta (Doctoral dissertation committee member), Sznitowska, Malgorzata (Doctoral dissertation committee member), Krauze-Baranowska, Miroslawa (Doctoral dissertation committee member), Ivanauskas, Liudas (Doctoral dissertation opponent).

Subjects/Keywords: Sorbus L; Flavonoidai; Fenolinės rūgštys; Efektyvioji skysčių chromatografija; Sorbus L; Flavonoids; Phenolic acids; HPLC

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gaivelytė, K. (2014). Šermukšnio (Sorbus L.) genties augalų fenolinių junginių tyrimas. (Doctoral Dissertation). Lithuanian Academic Libraries Network (LABT). Retrieved from http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140904_150010-61599 ;

Chicago Manual of Style (16^th Edition):

Gaivelytė, Kristina. “Šermukšnio (Sorbus L.) genties augalų fenolinių junginių tyrimas.” 2014. Doctoral Dissertation, Lithuanian Academic Libraries Network (LABT). Accessed January 21, 2021. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140904_150010-61599 ;.

MLA Handbook (7^th Edition):

Gaivelytė, Kristina. “Šermukšnio (Sorbus L.) genties augalų fenolinių junginių tyrimas.” 2014. Web. 21 Jan 2021.

Vancouver:

Gaivelytė K. Šermukšnio (Sorbus L.) genties augalų fenolinių junginių tyrimas. [Internet] [Doctoral dissertation]. Lithuanian Academic Libraries Network (LABT); 2014. [cited 2021 Jan 21]. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140904_150010-61599 ;.

Council of Science Editors:

Gaivelytė K. Šermukšnio (Sorbus L.) genties augalų fenolinių junginių tyrimas. [Doctoral Dissertation]. Lithuanian Academic Libraries Network (LABT); 2014. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140904_150010-61599 ;

28. Georgieva, Antoaneta / Георгиева, Антоанета. Psychopharmacological Effects of Phenolic Acids in Experimental Pharmacological Studies // Психофармакологични ефекти на фенолни киселини в експериментални фармакологични проучвания.

Degree: 2016, Medical University of Varna

URL: http://repository.mu-varna.bg/handle/nls/185

► [EN] This dissertation studies the psychopharmacological effects of the phenolic acids chromogenic, frolic and gallic and the flavonoid quercetin applied at an equal relatively low… (more)

▼ [EN] This dissertation studies the psychopharmacological effects of the phenolic acids chromogenic, frolic and gallic and the flavonoid quercetin applied at an equal relatively low dose to young/healthy rats. The effects of the phenolic acids chromogenic, frolic and gallic and of the flavonoid quercetin on the exploratory behavior and locomotor activity in young/healthy rats were investigated in comparative aspect and it was established for the first time that chromogenic acid and quercetin suppressed the exploratory behavior and locomotor activity of young/healthy rats. It was also observed that gallic acid suppressed this behavior and frolic acid had no effect on it. The effects of the phenolic acids chlorogenic, ferulic and gallic and of the flavonoid quercetin on learning and memory in young/healthy rats were investigated for the first time in comparative aspect and it was established that these substances improved learning and memory processes in the laboratory animals. The effects of the phenolic acids chlorogenic, ferulic and gallic and of the flavonoid quercetin on anxiety in young/healthy rats were investigated in comparative aspect and it was established for the first time that chlorogenic and gallic acid, applied subchronically to young/healthy rats at a relatively low dose had anxiolytic-like effect and ferulic acid had no effect on anxiety in the animals. It was also established that quercetin had anxiolytic-like effect in young/healthy rats. This research contributes to expanding the knowledge about the biological effects of the phenolic acids in healthy individuals. This may be helpful in promoting the healthy diet among the Bulgarian population and in introducing new natural products for the treatment of socially significant diseases like dementias and anxiety disorders. ///////// ///////// [BG] Дисертационният труд представлява научно проучване на психофармакологични ефекти на фенолните киселини хлорогенова, ферулова и галова и на флавоноида кверцетин, приложени в еднаква относително ниска доза при млади/здрави плъхове. За пръв път в сравнителен аспект са изследвани ефектите на фенолните киселини хлорогенова, ферулова и галова и на флавоноида кверцетин върху изследователското поведение и двигателната активност на млади/здрави плъхове, като за пръв път са установени потискащи ефекти на хлорогенова киселина и кверцетин върху двигателната активност при плъхове, потвърдени са данните за потискащия ефект на галова киселина и липсващия ефект на ферулова киселина върху тези показатели. За пръв път ефектите на фенолните киселини хлорогенова, ферулова и галова и на кверцетин върху паметта и обучението са изследвани в сравнителен аспект, като е установено, че изследваните вещества сравнимо подобряват паметовите и обучителни процеси при животните. За пръв път ефектите на фенолните киселини хлорогенова, ферулова и галова и на флавоноида кверцетин върху тревожното поведение на млади/здрави плъхове са изследвани в сравнителен аспект, като за пръв път са установени анксиолитично-подобни ефекти на хлорогенова и…

Subjects/Keywords: pharmacology; psychopharmacological; phenolic acids; flavonoid quercetin; anxiolytic; Фармакология, токсикология и фармакотерапия / Pharmacology, Toxicology and Pharmacotherapy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Georgieva, Antoaneta / Георгиева, �. (2016). Psychopharmacological Effects of Phenolic Acids in Experimental Pharmacological Studies // Психофармакологични ефекти на фенолни киселини в експериментални фармакологични проучвания. (Thesis). Medical University of Varna. Retrieved from http://repository.mu-varna.bg/handle/nls/185

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Georgieva, Antoaneta / Георгиева, Антоанета. “Psychopharmacological Effects of Phenolic Acids in Experimental Pharmacological Studies // Психофармакологични ефекти на фенолни киселини в експериментални фармакологични проучвания.” 2016. Thesis, Medical University of Varna. Accessed January 21, 2021. http://repository.mu-varna.bg/handle/nls/185.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Georgieva, Antoaneta / Георгиева, Антоанета. “Psychopharmacological Effects of Phenolic Acids in Experimental Pharmacological Studies // Психофармакологични ефекти на фенолни киселини в експериментални фармакологични проучвания.” 2016. Web. 21 Jan 2021.

Vancouver:

Georgieva, Antoaneta / Георгиева �. Psychopharmacological Effects of Phenolic Acids in Experimental Pharmacological Studies // Психофармакологични ефекти на фенолни киселини в експериментални фармакологични проучвания. [Internet] [Thesis]. Medical University of Varna; 2016. [cited 2021 Jan 21]. Available from: http://repository.mu-varna.bg/handle/nls/185.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Georgieva, Antoaneta / Георгиева �. Psychopharmacological Effects of Phenolic Acids in Experimental Pharmacological Studies // Психофармакологични ефекти на фенолни киселини в експериментални фармакологични проучвания. [Thesis]. Medical University of Varna; 2016. Available from: http://repository.mu-varna.bg/handle/nls/185

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Nova

29. Branco, Sónia Isabel Pereira. Aqueous biphasic system based on cholinium ionic liquids: extraction of biologically active phenolic acids.

Degree: 2014, Universidade Nova

URL: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/13788

► Phenolic acids are aromatic secondary plant metabolites, widely spread throughout the plant kingdom. Due to their biological and pharmacological properties, they have been playing an… (more)

Subjects/Keywords: Aqueous biphasic systems; Ionic liquids; Phenolic acids; Extraction; Biologically active natural compounds

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Branco, S. I. P. (2014). Aqueous biphasic system based on cholinium ionic liquids: extraction of biologically active phenolic acids. (Thesis). Universidade Nova. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/13788

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Branco, Sónia Isabel Pereira. “Aqueous biphasic system based on cholinium ionic liquids: extraction of biologically active phenolic acids.” 2014. Thesis, Universidade Nova. Accessed January 21, 2021. http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/13788.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Branco, Sónia Isabel Pereira. “Aqueous biphasic system based on cholinium ionic liquids: extraction of biologically active phenolic acids.” 2014. Web. 21 Jan 2021.

Vancouver:

Branco SIP. Aqueous biphasic system based on cholinium ionic liquids: extraction of biologically active phenolic acids. [Internet] [Thesis]. Universidade Nova; 2014. [cited 2021 Jan 21]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/13788.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Branco SIP. Aqueous biphasic system based on cholinium ionic liquids: extraction of biologically active phenolic acids. [Thesis]. Universidade Nova; 2014. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/13788

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

30. Vilas Boas, Sérgio Antonio Mendes. Studies on the solubility of phenolic compounds.

Degree: 2017, Instituto Politécnico de Bragança

URL: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/14601

►

Mestrado com dupla diplomação com a Universidade Tecnológica Federal do Paraná

Phenolic compounds generally act as antioxidant and free radical scavengers, having several practical applications… (more)

▼

Mestrado com dupla diplomação com a Universidade Tecnológica Federal do Paraná

Phenolic compounds generally act as antioxidant and free radical scavengers, having several practical applications in the pharmaceutical, food, oil and chemical industrial processes. Among those compounds, phenolic acids represent a group that is widely present in some natural products, showing interesting properties, such as preventers of some degenerative diseases, with application in the pharmaceutical industry. Furthermore, solubility studies play a key role to obtain a significant yield and a representative product, being an important parameter for the development of new drugs as well as the optimization of already existent processes. In this context, the main objective of this work is to measure the solubility of gallic, protocatechuic, gentisic and α-resorcylic acids in water and organic solvents (methanol, ethanol, 1-propanol, isopropanol, 2-butanone, ethyl acetate, dimethylformamide and acetonitrile) at 298.15 and 313.15 K and to employ the NRTL-SAC thermodynamic model coupled to the Reference Solvent Approach (RSA) to describe the solubility data. The experimental methodology was the shake-flask method coupled to the gravimetric method and, in general, the results obtained were satisfactorily consistent with the information available in literature for gallic and protocatechuic acids. For gentisic and α-resorcylic acids, no solubility studies were found at the analyzed temperatures until now. Melting points and enthalpies of fusion of the selected phenolic acids were also measured via Differential Scanning Calorimetry (DSC). Finally, the NRTL-SAC segment descriptors were obtained by fitting the solubility data in seven solvents, obtaining average relative deviations (ARD) between 25 and 34%. The model was then applied to predict the solubility in 1-propanol and dimethylformamide and the ARD% were 70 and 78%, respectively. Those values are satisfactory for semi-predictive models, using a limited set of solvents, showing that the NRTL-SAC is adequate to model binary systems containing the selected phenolic acids.

Compostos fenólicos geralmente agem como antioxidantes e sequestradores de radicais livres, possuindo diversas aplicações práticas, tais como em processos farmacêuticos, alimentícios, na indústria de petróleo e na indústria química. Dentre esses compostos, os ácidos fenólicos representam um grupo amplamente presente in alguns produtos naturais, apresentando propriedades interessantes, como preventivos de algumas doenças degenerativas, o que os torna amplamente utilizados na indústria farmacêutica. Além disso, estudos de solubilidade desempenham um papel chave para a obtenção de rendimentos significativos e produtos representativos na indústria farmacêutica, sendo a solubilidade um parâmetro primordial no desenvolvimento de novos medicamentos bem como na otimização de processos já implementados. Nesse contexto, o principal objetivo deste trabalho é a medição de solubilidade dos ácidos gálico, protocatechuico, gentísico…

Advisors/Committee Members: Pinho, Simão, Ferreira, Olga, Fernandes, Luciano.

Subjects/Keywords: Solubility; Phenolic acids; NRTL-SAC; Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Química

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Vilas Boas, S. A. M. (2017). Studies on the solubility of phenolic compounds. (Thesis). Instituto Politécnico de Bragança. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/14601

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Vilas Boas, Sérgio Antonio Mendes. “Studies on the solubility of phenolic compounds.” 2017. Thesis, Instituto Politécnico de Bragança. Accessed January 21, 2021. https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/14601.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Vilas Boas, Sérgio Antonio Mendes. “Studies on the solubility of phenolic compounds.” 2017. Web. 21 Jan 2021.

Vancouver:

Vilas Boas SAM. Studies on the solubility of phenolic compounds. [Internet] [Thesis]. Instituto Politécnico de Bragança; 2017. [cited 2021 Jan 21]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/14601.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Vilas Boas SAM. Studies on the solubility of phenolic compounds. [Thesis]. Instituto Politécnico de Bragança; 2017. Available from: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/14601

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Open Access Theses and Dissertations