subject:(Lignin)

Oregon State University

1. Junyusen, Tiraporn. Wheat lignin as a functional dietary fiber component.

Degree: PhD, Food Science and Technology, 2013, Oregon State University

URL: http://hdl.handle.net/1957/44858

► This dissertation has focused on lignin byproducts that result from the alkali processing of wheat straw. The first study evaluated the application of “standard” lignin… (more)

▼ This dissertation has focused on lignin byproducts that result from the alkali processing of wheat straw. The first study evaluated the application of “standard” lignin quantification methods for summative analyses of alkali-based processes. Mass closure during NaOH processing at 25, 50, and 75°C of wheat straw was evaluated using the acid insoluble lignin (AIL) and acid soluble lignin (ASL) assays (per U.S. National Renewable Energy Laboratory guidance). In general, a fraction of the water and ethanol soluble extractives of straw measure as lignin, hereafter termed artifactual lignin. Actual AIL recovered from the alkali insoluble fraction resulting from alkali processing (AP) of extractive free wheat straw (EFS) at 25, 50 and 75°C was 64, 48, and 34% of the AIL in the original wheat straw, respectively. The percent overestimation of AIL in the insoluble phase from AP of native wheat straw (NS) decreased with increasing pretreatment severity. The trend was that the higher the severity of AP the lower the artifactual AIL in the insoluble phase. Summation of the AIL and ASL data indicated alkali processing resulted in a loss of both actual and artifactual AIL in both the soluble and insoluble phases. The amount of lignin loss in such processes was a function of the severity of the process. The second study focused on the recovery of wheat straw lignin via precipitation from alkali extract liquor (AEL). Lignin recovery is important due to lignin’s potential for subsequent value-added processing. In this work, wheat straw was treated with 5% NaOH at 50°C for 5 h to produce AEL. Lignin recovery from AEL, quantified as precipitated solids, acid insoluble lignin (AIL), and acid soluble lignin (ASL), was evaluated over a range of pH (1.5 to 7), temperature (4° to 70 °C), supplemental salts (0 to 2.5M) and presence/absence of hemicellulose. Lignin recovery, measured as ash-adjusted solids, generally increases as pH decreases. Temperature does not appear to significantly affect rates or extents of solids recovery at low pH; at neutral pH, increased temperature increased rates of precipitation but had minimal to no effect on extent of lignin recovery following a one hour precipitation period. At neutral pH and moderate temperature, ionic strength significantly affects solids recovery. Increased ionic strength increases rates and extents of lignin precipitation. Hemicellulose interferes with rates of lignin precipitation and appears to co-precipitate. Structural implications of these results are considered. The aim of the third study was to determine the feasibility of using lignin-rich fractions of alkali processed wheat straw as “functional dietary fibers” based on their in vitro bile acid binding capacity. Bile acid binding capacity is important in this context because of the documented relationship between fecal excretion of bile acids and serum cholesterol levels. In this study, wheat straw (WS), alkali extracted solids (AES), enzyme saccharification residues (ESR), and alkali lignin (AL) were used to determine bile… Advisors/Committee Members: Penner, Michael H. (advisor), Kelly, Christine (committee member).

Subjects/Keywords: Lignin

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APA (6^th Edition):

Junyusen, T. (2013). Wheat lignin as a functional dietary fiber component. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/44858

Chicago Manual of Style (16^th Edition):

Junyusen, Tiraporn. “Wheat lignin as a functional dietary fiber component.” 2013. Doctoral Dissertation, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/44858.

MLA Handbook (7^th Edition):

Junyusen, Tiraporn. “Wheat lignin as a functional dietary fiber component.” 2013. Web. 19 Oct 2019.

Vancouver:

Junyusen T. Wheat lignin as a functional dietary fiber component. [Internet] [Doctoral dissertation]. Oregon State University; 2013. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/44858.

Council of Science Editors:

Junyusen T. Wheat lignin as a functional dietary fiber component. [Doctoral Dissertation]. Oregon State University; 2013. Available from: http://hdl.handle.net/1957/44858

Rutgers University

2. Al-shahrani, Dalia, 1990-. Understanding the self-assembly of lignin-based biomaterials.

Degree: MS, Chemistry, 2018, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/56992/

► Developing bio-renewable raw materials for manufacturing and technology has become a focus of research, with special interest in the field of biomaterials. Lignocellulosic biomass can… (more)

▼ Developing bio-renewable raw materials for manufacturing and technology has become a focus of research, with special interest in the field of biomaterials. Lignocellulosic biomass can be utilized as a raw material to produce chemicals and it is an important feedstock for renewable fuels in the production of energy. Lignocellulose is composed of mainly three biomacromolecules (cellulose, hemicellulose and lignin). Currently, most of the extracted lignin is either decanted in nearby waters or burned in energy-recovery systems. The reason why lignin is disposed of instead of being further processed is that lignin is immiscible with most polymers and its association behavior is still unknown due to its non-uniform aromatic structure with a number of methoxy, ether and ester groups. To fully utilize lignin, an improved understanding of the interfacial adhesion and interfacial tension is needed. The main motivation for this project is to find new possible ways to make lignin, a lignocellulose component, miscible with most polymers, and to understand how the molecule associates and behaves in the presence of other natural macromolecules. One of the main barriers to utilization of lignin is the absence of significant intermolecular interactions, which cause miscibility problems resulting in phase separation, a generally undesirable characteristic for manufacturing applications, especially in the production of materials. Lignin-based polymeric blends in solution have provided a possible avenue for understanding lignin’s self-assembly behavior in solid and the variations in morphology, physical and thermal properties that come with the addition of secondary and tertiary components, and as well as foreign molecules such reduced graphene oxide (rGO). In the first study, we focused on understanding the association behavior using high and low proportions of cellulose to test how the various functional groups may interact differentially with lignin utilizing ionic liquids as the solvent and water as the coagulation agent. A tertiary component, rGO, was introduced into the lignin-based biocomposite to modify π-π aggregations. The study looks at the effect of rGO as a function material concentration. The biocomposites were investigated using Attenuated Total Reflectance Fourier Transform Infrared spectroscopy (ATR-FTIR), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC) and Scanning Electron Microscope (SEM) techniques. Results show that π-π aggregates are driven by the π-π interaction of the aromatic groups in lignin. The π-π aggregates undergo disaggregation by the addition of rGO on the blended biocomposite. The results showed that increasing the cellulose content in the cellulose-lignin biocomposite can increase the molecular interactions, causing an increase in the stability of the blended film and an increase in the crystallinity of the cellulose. Profound changes in the morphology was observed upon the addition of rGO. Results demonstrates that the addition of rGO into the biocomposite prevented the… Advisors/Committee Members: Salas-de la Cruz, David (chair), Zhu, Hao (internal member), Fu, Jinglin (internal member).

Subjects/Keywords: Lignin

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APA (6^th Edition):

Al-shahrani, Dalia, 1. (2018). Understanding the self-assembly of lignin-based biomaterials. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/56992/

Chicago Manual of Style (16^th Edition):

Al-shahrani, Dalia, 1990-. “Understanding the self-assembly of lignin-based biomaterials.” 2018. Masters Thesis, Rutgers University. Accessed October 19, 2019. https://rucore.libraries.rutgers.edu/rutgers-lib/56992/.

MLA Handbook (7^th Edition):

Al-shahrani, Dalia, 1990-. “Understanding the self-assembly of lignin-based biomaterials.” 2018. Web. 19 Oct 2019.

Vancouver:

Al-shahrani, Dalia 1. Understanding the self-assembly of lignin-based biomaterials. [Internet] [Masters thesis]. Rutgers University; 2018. [cited 2019 Oct 19]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/56992/.

Council of Science Editors:

Al-shahrani, Dalia 1. Understanding the self-assembly of lignin-based biomaterials. [Masters Thesis]. Rutgers University; 2018. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/56992/

Oregon State University

3. Goby, Jeffrey Dean. Experimental approach for the determination of lignin modification by manganese peroxidase.

Degree: MS, Chemical Engineering, 2010, Oregon State University

URL: http://hdl.handle.net/1957/13827

► Degradation of lignin to simpler compounds is desirable for removing residual lignin during paper manufacture and accessing biomass carbohydrates for biofuel production, among other purposes.… (more)

▼ Degradation of lignin to simpler compounds is desirable for removing residual lignin during paper manufacture and accessing biomass carbohydrates for biofuel production, among other purposes. Lignin transformation using enzymes found in white rot fungi, some of nature's most efficient lignin-degrading organisms, offers a more environmentally benign, selective, and possibly less costly alternative to purely thermochemical means. One type of enzyme used by white rot fungi to degrade lignin in vivo is manganese peroxidase (MnP), which has been successfully purified from the native fungi and produced recombinantly in high yields. To facilitate investigation of lignin transformation by recombinant manganese peroxidase (rMnP), reaction systems were developed and assays refined to detect lignin transformation products. The systems were tested with different solid lignin substrates and sets of components that affect the ability of rMnP to degrade the solid substrate. In several experiments, the dye methylene blue was used as an rMnP substrate and lignin surrogate to rapidly determine the oxidative capacity of rMnP systems containing different short chain organic acids (malonate or oxalate), fatty acids (oleic, linoleic, or linolenic acids), and iron reducing agents (3,4-dihydroxyphenyl acetic acid, vanillic acid, wheat straw extracts). The dye was also used to determine the effect of a Fenton pretreatment on the ability of a subsequent rMnP treatment to degrade a substrate. Two solid wheat straw lignin substrates were used in the reaction system tests: acid insoluble lignin (AIL) and lignin remaining after dilute acid pretreatment, and cellulase saccharification and desorption (mild acid lignin, MAL). Degradation of AIL was undetected in an rMnP system containing malonate and hydrogen peroxide at several concentrations, but a colored high molecular weight (>10 kDa) Mn(III)-malonate complex was generated in the system with 0.1 mM hydrogen peroxide. Degradation of MAL or improved glucose yield due to synergy between cellulases and rMnP were also not definitively detected in a system containing rMnP, cellulases, and linoleic acid. On the other hand, rMnP-induced cellulase inhibition did appear to occur. The rMnP systems containing an emulsified polyunsaturated fatty acid (linoleic acid or linolenic acid) were more effective at degrading methylene blue dye than rMnP systems containing malonate or oxalate in place of the fatty acid. This was likely due to formation of reactive lipid peroxyl radicals which oxidized the dye by hydrogen or electron abstraction. Addition of malonate, oxalate, or iron reducing agent to the rMnP system with emulsified linoleic acid resulted in variable dye degradation. Each iron reducing agent inhibited degradation, oxalate had no effect, and malonate drastically increased the degradation rate. It is likely that malonate increased the degradation rate because it promoted rMnP production of Mn(III) chelates. Degradation in this rMnP system depended on the presence of rMnP and manganese, but occurred… Advisors/Committee Members: Kelly, Christine J. (advisor), Kamke, Frederick A. (committee member).

Subjects/Keywords: lignin; Lignin – Biodegradation

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APA (6^th Edition):

Goby, J. D. (2010). Experimental approach for the determination of lignin modification by manganese peroxidase. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/13827

Chicago Manual of Style (16^th Edition):

Goby, Jeffrey Dean. “Experimental approach for the determination of lignin modification by manganese peroxidase.” 2010. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/13827.

MLA Handbook (7^th Edition):

Goby, Jeffrey Dean. “Experimental approach for the determination of lignin modification by manganese peroxidase.” 2010. Web. 19 Oct 2019.

Vancouver:

Goby JD. Experimental approach for the determination of lignin modification by manganese peroxidase. [Internet] [Masters thesis]. Oregon State University; 2010. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/13827.

Council of Science Editors:

Goby JD. Experimental approach for the determination of lignin modification by manganese peroxidase. [Masters Thesis]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/13827

Oregon State University

4. Caskey, Frank Edward. A study of the nature of benzyl alcohol lignin.

Degree: MA, Chemistry, 1941, Oregon State University

URL: http://hdl.handle.net/1957/51615

Subjects/Keywords: Lignin

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APA (6^th Edition):

Caskey, F. E. (1941). A study of the nature of benzyl alcohol lignin. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/51615

Chicago Manual of Style (16^th Edition):

Caskey, Frank Edward. “A study of the nature of benzyl alcohol lignin.” 1941. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/51615.

MLA Handbook (7^th Edition):

Caskey, Frank Edward. “A study of the nature of benzyl alcohol lignin.” 1941. Web. 19 Oct 2019.

Vancouver:

Caskey FE. A study of the nature of benzyl alcohol lignin. [Internet] [Masters thesis]. Oregon State University; 1941. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/51615.

Council of Science Editors:

Caskey FE. A study of the nature of benzyl alcohol lignin. [Masters Thesis]. Oregon State University; 1941. Available from: http://hdl.handle.net/1957/51615

Oregon State University

5. Lovin, Robert Joseph. A preliminary investigation of the catalytic hydrogenation of sulfonated lignin.

Degree: MS, Chemistry, 1941, Oregon State University

URL: http://hdl.handle.net/1957/52178

Subjects/Keywords: Lignin

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APA (6^th Edition):

Lovin, R. J. (1941). A preliminary investigation of the catalytic hydrogenation of sulfonated lignin. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/52178

Chicago Manual of Style (16^th Edition):

Lovin, Robert Joseph. “A preliminary investigation of the catalytic hydrogenation of sulfonated lignin.” 1941. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/52178.

MLA Handbook (7^th Edition):

Lovin, Robert Joseph. “A preliminary investigation of the catalytic hydrogenation of sulfonated lignin.” 1941. Web. 19 Oct 2019.

Vancouver:

Lovin RJ. A preliminary investigation of the catalytic hydrogenation of sulfonated lignin. [Internet] [Masters thesis]. Oregon State University; 1941. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/52178.

Council of Science Editors:

Lovin RJ. A preliminary investigation of the catalytic hydrogenation of sulfonated lignin. [Masters Thesis]. Oregon State University; 1941. Available from: http://hdl.handle.net/1957/52178

Oregon State University

6. McCully, Charles Roland. Studies on the lignin of western woods.

Degree: MS, Chemistry, 1937, Oregon State University

URL: http://hdl.handle.net/1957/52506

Subjects/Keywords: Lignin

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APA (6^th Edition):

McCully, C. R. (1937). Studies on the lignin of western woods. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/52506

Chicago Manual of Style (16^th Edition):

McCully, Charles Roland. “Studies on the lignin of western woods.” 1937. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/52506.

MLA Handbook (7^th Edition):

McCully, Charles Roland. “Studies on the lignin of western woods.” 1937. Web. 19 Oct 2019.

Vancouver:

McCully CR. Studies on the lignin of western woods. [Internet] [Masters thesis]. Oregon State University; 1937. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/52506.

Council of Science Editors:

McCully CR. Studies on the lignin of western woods. [Masters Thesis]. Oregon State University; 1937. Available from: http://hdl.handle.net/1957/52506

Oregon State University

7. Englert, Robert Dixon. A study of the chemical utilization of Scholler lignin through chemical modification by reaction with certain ammonia type nitrogen compounds.

Degree: MS, Physical Chemistry, 1944, Oregon State University

URL: http://hdl.handle.net/1957/52906

Subjects/Keywords: Lignin

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APA (6^th Edition):

Englert, R. D. (1944). A study of the chemical utilization of Scholler lignin through chemical modification by reaction with certain ammonia type nitrogen compounds. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/52906

Chicago Manual of Style (16^th Edition):

Englert, Robert Dixon. “A study of the chemical utilization of Scholler lignin through chemical modification by reaction with certain ammonia type nitrogen compounds.” 1944. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/52906.

MLA Handbook (7^th Edition):

Englert, Robert Dixon. “A study of the chemical utilization of Scholler lignin through chemical modification by reaction with certain ammonia type nitrogen compounds.” 1944. Web. 19 Oct 2019.

Vancouver:

Englert RD. A study of the chemical utilization of Scholler lignin through chemical modification by reaction with certain ammonia type nitrogen compounds. [Internet] [Masters thesis]. Oregon State University; 1944. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/52906.

Council of Science Editors:

Englert RD. A study of the chemical utilization of Scholler lignin through chemical modification by reaction with certain ammonia type nitrogen compounds. [Masters Thesis]. Oregon State University; 1944. Available from: http://hdl.handle.net/1957/52906

Oregon State University

8. Southworth, Hugh Alexander. The mechanism of the sulfonation of lignin as revealed by its reaction with methyl hypochlorite.

Degree: MS, Science, 1943, Oregon State University

URL: http://hdl.handle.net/1957/52927

Subjects/Keywords: Lignin

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APA (6^th Edition):

Southworth, H. A. (1943). The mechanism of the sulfonation of lignin as revealed by its reaction with methyl hypochlorite. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/52927

Chicago Manual of Style (16^th Edition):

Southworth, Hugh Alexander. “The mechanism of the sulfonation of lignin as revealed by its reaction with methyl hypochlorite.” 1943. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/52927.

MLA Handbook (7^th Edition):

Southworth, Hugh Alexander. “The mechanism of the sulfonation of lignin as revealed by its reaction with methyl hypochlorite.” 1943. Web. 19 Oct 2019.

Vancouver:

Southworth HA. The mechanism of the sulfonation of lignin as revealed by its reaction with methyl hypochlorite. [Internet] [Masters thesis]. Oregon State University; 1943. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/52927.

Council of Science Editors:

Southworth HA. The mechanism of the sulfonation of lignin as revealed by its reaction with methyl hypochlorite. [Masters Thesis]. Oregon State University; 1943. Available from: http://hdl.handle.net/1957/52927

Oregon State University

9. Ezell, Albert Iven. Preparation and properties of the acetyl, benzoyl and methyl derivatives of soda lignin.

Degree: MS, Science, 1943, Oregon State University

URL: http://hdl.handle.net/1957/53040

Subjects/Keywords: Lignin

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APA (6^th Edition):

Ezell, A. I. (1943). Preparation and properties of the acetyl, benzoyl and methyl derivatives of soda lignin. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/53040

Chicago Manual of Style (16^th Edition):

Ezell, Albert Iven. “Preparation and properties of the acetyl, benzoyl and methyl derivatives of soda lignin.” 1943. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/53040.

MLA Handbook (7^th Edition):

Ezell, Albert Iven. “Preparation and properties of the acetyl, benzoyl and methyl derivatives of soda lignin.” 1943. Web. 19 Oct 2019.

Vancouver:

Ezell AI. Preparation and properties of the acetyl, benzoyl and methyl derivatives of soda lignin. [Internet] [Masters thesis]. Oregon State University; 1943. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/53040.

Council of Science Editors:

Ezell AI. Preparation and properties of the acetyl, benzoyl and methyl derivatives of soda lignin. [Masters Thesis]. Oregon State University; 1943. Available from: http://hdl.handle.net/1957/53040

Oregon State University

10. Pehrsson, Hildger Alfred. The solvent extraction of lignin with dioxane.

Degree: MS, Chemical Engineering, 1949, Oregon State University

URL: http://hdl.handle.net/1957/52941

Subjects/Keywords: Lignin

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APA (6^th Edition):

Pehrsson, H. A. (1949). The solvent extraction of lignin with dioxane. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/52941

Chicago Manual of Style (16^th Edition):

Pehrsson, Hildger Alfred. “The solvent extraction of lignin with dioxane.” 1949. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/52941.

MLA Handbook (7^th Edition):

Pehrsson, Hildger Alfred. “The solvent extraction of lignin with dioxane.” 1949. Web. 19 Oct 2019.

Vancouver:

Pehrsson HA. The solvent extraction of lignin with dioxane. [Internet] [Masters thesis]. Oregon State University; 1949. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/52941.

Council of Science Editors:

Pehrsson HA. The solvent extraction of lignin with dioxane. [Masters Thesis]. Oregon State University; 1949. Available from: http://hdl.handle.net/1957/52941

Oregon State University

11. Erickson, Donald Lindsay. Solvent fractionation of lignin prepared from western hemlock by extraction with benzyl alcohol.

Degree: MS, Chemistry, 1939, Oregon State University

URL: http://hdl.handle.net/1957/52987

Subjects/Keywords: Lignin

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APA (6^th Edition):

Erickson, D. L. (1939). Solvent fractionation of lignin prepared from western hemlock by extraction with benzyl alcohol. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/52987

Chicago Manual of Style (16^th Edition):

Erickson, Donald Lindsay. “Solvent fractionation of lignin prepared from western hemlock by extraction with benzyl alcohol.” 1939. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/52987.

MLA Handbook (7^th Edition):

Erickson, Donald Lindsay. “Solvent fractionation of lignin prepared from western hemlock by extraction with benzyl alcohol.” 1939. Web. 19 Oct 2019.

Vancouver:

Erickson DL. Solvent fractionation of lignin prepared from western hemlock by extraction with benzyl alcohol. [Internet] [Masters thesis]. Oregon State University; 1939. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/52987.

Council of Science Editors:

Erickson DL. Solvent fractionation of lignin prepared from western hemlock by extraction with benzyl alcohol. [Masters Thesis]. Oregon State University; 1939. Available from: http://hdl.handle.net/1957/52987

Oregon State University

12. Rydalch, Eva Ann. The determination of the approximate molecular weight, particle size, and homogeneity of some soda lignins.

Degree: MS, Organic Chemistry, 1948, Oregon State University

URL: http://hdl.handle.net/1957/53517

Subjects/Keywords: Lignin

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APA (6^th Edition):

Rydalch, E. A. (1948). The determination of the approximate molecular weight, particle size, and homogeneity of some soda lignins. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/53517

Chicago Manual of Style (16^th Edition):

Rydalch, Eva Ann. “The determination of the approximate molecular weight, particle size, and homogeneity of some soda lignins.” 1948. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/53517.

MLA Handbook (7^th Edition):

Rydalch, Eva Ann. “The determination of the approximate molecular weight, particle size, and homogeneity of some soda lignins.” 1948. Web. 19 Oct 2019.

Vancouver:

Rydalch EA. The determination of the approximate molecular weight, particle size, and homogeneity of some soda lignins. [Internet] [Masters thesis]. Oregon State University; 1948. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/53517.

Council of Science Editors:

Rydalch EA. The determination of the approximate molecular weight, particle size, and homogeneity of some soda lignins. [Masters Thesis]. Oregon State University; 1948. Available from: http://hdl.handle.net/1957/53517

Oregon State University

13. Kroll, Robert Louis. Carbonization products from Scholler lignin.

Degree: MA, Chemistry, 1947, Oregon State University

URL: http://hdl.handle.net/1957/53672

Subjects/Keywords: Lignin

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APA (6^th Edition):

Kroll, R. L. (1947). Carbonization products from Scholler lignin. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/53672

Chicago Manual of Style (16^th Edition):

Kroll, Robert Louis. “Carbonization products from Scholler lignin.” 1947. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/53672.

MLA Handbook (7^th Edition):

Kroll, Robert Louis. “Carbonization products from Scholler lignin.” 1947. Web. 19 Oct 2019.

Vancouver:

Kroll RL. Carbonization products from Scholler lignin. [Internet] [Masters thesis]. Oregon State University; 1947. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/53672.

Council of Science Editors:

Kroll RL. Carbonization products from Scholler lignin. [Masters Thesis]. Oregon State University; 1947. Available from: http://hdl.handle.net/1957/53672

University of Hong Kong

14. 林佩瑩; Lam, Pui-ying. Characterization of tricin biosynthesis pathway and lignin composition in rice.

Degree: PhD, 2016, University of Hong Kong

URL: http://hdl.handle.net/10722/250724

► Tricin, a 3’,5’-dimethoxylated flavone, is an ubiquitous secondary metabolite in a number of monocots including sedges, palms and grasses. In plants, tricin exists in the… (more)

▼ Tricin, a 3’,5’-dimethoxylated flavone, is an ubiquitous secondary metabolite in a number of monocots including sedges, palms and grasses. In plants, tricin exists in the forms of aglycone, O-glycosides and O-flavanolignols, and is also covalently linked to cell wall lignin polymers. Soluble tricin O-conjugates functions as allelochemicals and insect deterrents, while tricin in lignin polymers acts as a nucleation site for lignification. To humans, consumption of tricin is beneficial to health due to its anti-oxidant, anti-cancer and anti-inflammatory properties. However, not much is known about how tricin is synthesized in plants. In this study, key enzymes involved in the biosynthesis tricin in rice were identified and characterized. This study has provided in vitro and in vivo evidence to show CYP93G1 as a flavone synthase II (FNSII) that channels flavanones to the formation of flavones, including tricin. In vitro enzyme assays have shown that recombinant CYP93G1 can convert naringenin and eriodictyol into apigenin and luteolin, respectively. Transgenic Arabidopsis over-expressing CYP93G1 accumulated flavone O-glycosides, and a rice CYP93G1 mutant was depleted in the accumulation of all flavone O-conjugates. The acquisition of FNSIIs in monocots was expected to be independent from the dicot FNSIIs of the CYP93B subfamily, leading to the wide spread occurrence of tricin type flavone derivatives in monocots. The enzyme responsible for the 5’-hydroxylation of tricin was also isolated from characterization of rice mutants. A rice CYP75B4 mutant was depleted in the accumulation of selgin and tricin, which are 5’-hydroxylated and 5’-methoxylated flavones, respectively. Co-expressing CYP75B4 and CYP93G1 in Arabidopsis also resulted in the generation of selgin and tricin. In vitro enzyme assays confirmed that CYP75B4 catalyzed 3’-hydroxylation of most classes of flavonoids, while the 5’-hydroxylation activity was specific to chrysoeriol (a 3’-methoxylated flavone). The identification of CYP75B4 in tricin biosynthesis might indicate that grass species acquired chrysoeriol 5’-hydroxylase from gene duplication and function diversification of flavonoid 3’-hydroxylases, and is distinct from the flavonoid 3’,5’-hydroxylases in the CYP75A subfamily that catalyze a broad range of flavonoid substrates by sequential 3’ and 5’-hydroxylation. Moreover, this study also showed that CAldOMT1/ROMT9 is an O-methyltransferase involved in tricin biosynthesis in rice by metabolite analysis of a rice CAldOMT1/ROMT9 knockout mutant. Finally, the roles of tricin in lignification were investigated by cell wall characterizations of the rice CYP93G1, CYP75B4 and CAldOMT1/ROMT9 mutants. Histochemical staining and thioglycolic acid lignin analysis showed that flavonoid and lignin contents were largely reduced in these mutants. Thioacidolysis indicated that the knocking out CYP93G1 or CYP75B4 did not change the core lignin composition. 2D-HSQC-NMR analysis confirmed the depletion of tricin in these two mutants while naringenin was…

Subjects/Keywords: Lignin; Flavonoids

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APA (6^th Edition):

林佩瑩; Lam, P. (2016). Characterization of tricin biosynthesis pathway and lignin composition in rice. (Doctoral Dissertation). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/250724

Chicago Manual of Style (16^th Edition):

林佩瑩; Lam, Pui-ying. “Characterization of tricin biosynthesis pathway and lignin composition in rice.” 2016. Doctoral Dissertation, University of Hong Kong. Accessed October 19, 2019. http://hdl.handle.net/10722/250724.

MLA Handbook (7^th Edition):

林佩瑩; Lam, Pui-ying. “Characterization of tricin biosynthesis pathway and lignin composition in rice.” 2016. Web. 19 Oct 2019.

Vancouver:

林佩瑩; Lam P. Characterization of tricin biosynthesis pathway and lignin composition in rice. [Internet] [Doctoral dissertation]. University of Hong Kong; 2016. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10722/250724.

Council of Science Editors:

林佩瑩; Lam P. Characterization of tricin biosynthesis pathway and lignin composition in rice. [Doctoral Dissertation]. University of Hong Kong; 2016. Available from: http://hdl.handle.net/10722/250724

McGill University

15. McNaughton, John Gilchrist. Macromolecular distribution of lignin in alkaline extracts of wood.

Degree: MS, Department of Chemistry., 1966, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile47008.pdf

Subjects/Keywords: Lignin

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APA (6^th Edition):

McNaughton, J. G. (1966). Macromolecular distribution of lignin in alkaline extracts of wood. (Masters Thesis). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile47008.pdf

Chicago Manual of Style (16^th Edition):

McNaughton, John Gilchrist. “Macromolecular distribution of lignin in alkaline extracts of wood.” 1966. Masters Thesis, McGill University. Accessed October 19, 2019. http://digitool.library.mcgill.ca/thesisfile47008.pdf.

MLA Handbook (7^th Edition):

McNaughton, John Gilchrist. “Macromolecular distribution of lignin in alkaline extracts of wood.” 1966. Web. 19 Oct 2019.

Vancouver:

McNaughton JG. Macromolecular distribution of lignin in alkaline extracts of wood. [Internet] [Masters thesis]. McGill University; 1966. [cited 2019 Oct 19]. Available from: http://digitool.library.mcgill.ca/thesisfile47008.pdf.

Council of Science Editors:

McNaughton JG. Macromolecular distribution of lignin in alkaline extracts of wood. [Masters Thesis]. McGill University; 1966. Available from: http://digitool.library.mcgill.ca/thesisfile47008.pdf

McGill University

16. Brenner, Helen S. Macromolecular structure of lignin.

Degree: MS, Department of Chemistry, 1969, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile48977.pdf

Subjects/Keywords: Lignin

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APA (6^th Edition):

Brenner, H. S. (1969). Macromolecular structure of lignin. (Masters Thesis). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile48977.pdf

Chicago Manual of Style (16^th Edition):

Brenner, Helen S. “Macromolecular structure of lignin.” 1969. Masters Thesis, McGill University. Accessed October 19, 2019. http://digitool.library.mcgill.ca/thesisfile48977.pdf.

MLA Handbook (7^th Edition):

Brenner, Helen S. “Macromolecular structure of lignin.” 1969. Web. 19 Oct 2019.

Vancouver:

Brenner HS. Macromolecular structure of lignin. [Internet] [Masters thesis]. McGill University; 1969. [cited 2019 Oct 19]. Available from: http://digitool.library.mcgill.ca/thesisfile48977.pdf.

Council of Science Editors:

Brenner HS. Macromolecular structure of lignin. [Masters Thesis]. McGill University; 1969. Available from: http://digitool.library.mcgill.ca/thesisfile48977.pdf

McGill University

17. Chew, Chwee-Har. Solvolytic extraction of lignin from wood.

Degree: PhD, Department of Chemistry., 1968, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile70118.pdf

Subjects/Keywords: Lignin

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APA (6^th Edition):

Chew, C. (1968). Solvolytic extraction of lignin from wood. (Doctoral Dissertation). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile70118.pdf

Chicago Manual of Style (16^th Edition):

Chew, Chwee-Har. “Solvolytic extraction of lignin from wood.” 1968. Doctoral Dissertation, McGill University. Accessed October 19, 2019. http://digitool.library.mcgill.ca/thesisfile70118.pdf.

MLA Handbook (7^th Edition):

Chew, Chwee-Har. “Solvolytic extraction of lignin from wood.” 1968. Web. 19 Oct 2019.

Vancouver:

Chew C. Solvolytic extraction of lignin from wood. [Internet] [Doctoral dissertation]. McGill University; 1968. [cited 2019 Oct 19]. Available from: http://digitool.library.mcgill.ca/thesisfile70118.pdf.

Council of Science Editors:

Chew C. Solvolytic extraction of lignin from wood. [Doctoral Dissertation]. McGill University; 1968. Available from: http://digitool.library.mcgill.ca/thesisfile70118.pdf

McGill University

18. Mbachu, Reginald Darlington. Degradation of lignin by ozone.

Degree: PhD, Department of Chemistry, 1979, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile151688.pdf

►

Note:

A physicochemical study of the mechanism of lignin degradation by ozone has been made using spruce periodate and cuoxam lignins and spruce wood protolignin.… (more)

▼

Note:

A physicochemical study of the mechanism of lignin degradation by ozone has been made using spruce periodate and cuoxam lignins and spruce wood protolignin. The ozonization was carried out in 45% aqueous acetic acid. In all cases, degradation was found to follow first order kinetics indicating a similar reaction mechanism and a single rate controlling process. From the rate constants obtained, it was concluded that the carbohydrate moieties in wood do not affect the rate of protolignin degradation and dissolution. Spectroscopic studies of the alkalisoluble degradation products of lignin showed that the chemical mechanism is probably electrophilic, involving the attack on phenol ether bonds, methoxyl groups, aromatic and other unsaturated structures and the formation of carboxyl groups. Decarboxylation occurs in the later stages of the reaction. From a consideration of the possible reactions that may degrade the lignin network, it was concluded that the observed phenol ether bond cleavage is the principal network-degrading reaction during ozonization. [...]

Une étude physicochimique du mécanisme de dégradation des lignines periodate et cuoxame de l'épinette et de la protolignine du bois d'épinette a été effectuée. L’ozonisation fut accomplie en solution aqueuse d'acide acétique à 45%. Une cinétique de premier order lors de la dégradation fut obtenue dans les trois cas, indiquant un mécanisme de réaction similaire et que la dégradation est contrôlée par une seule étape. A partir des constantes de vitesse obtenues, il fut conclu que les hydrates de carbone dans le bois n'influençaient pas le taux de dégradation et de dissolution de la lignine. Des études spectroscopiques sur les produits de dégradation de la lignine qui sont solubles en milieu alcalin, ont montré que le mécanisme de la réaction est fort probablement de type électrophilique, comportant une attaque des liens éther phénolique, des groupes méthoxyles, aromatiques et autres structures insaturées, ainsi que la formation de groupes carboxyliques. La décarboxylation se produit à des stades ultérieurs de la réaction. [...]

Advisors/Committee Members: ().

Subjects/Keywords: Lignin.

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APA (6^th Edition):

Mbachu, R. D. (1979). Degradation of lignin by ozone. (Doctoral Dissertation). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile151688.pdf

Chicago Manual of Style (16^th Edition):

Mbachu, Reginald Darlington. “Degradation of lignin by ozone.” 1979. Doctoral Dissertation, McGill University. Accessed October 19, 2019. http://digitool.library.mcgill.ca/thesisfile151688.pdf.

MLA Handbook (7^th Edition):

Mbachu, Reginald Darlington. “Degradation of lignin by ozone.” 1979. Web. 19 Oct 2019.

Vancouver:

Mbachu RD. Degradation of lignin by ozone. [Internet] [Doctoral dissertation]. McGill University; 1979. [cited 2019 Oct 19]. Available from: http://digitool.library.mcgill.ca/thesisfile151688.pdf.

Council of Science Editors:

Mbachu RD. Degradation of lignin by ozone. [Doctoral Dissertation]. McGill University; 1979. Available from: http://digitool.library.mcgill.ca/thesisfile151688.pdf

McGill University

19. MacDougall, Daniel. Studies on the chemical determination of plant lignin.

Degree: PhD, Department of Biochemistry., 1944, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile126038.pdf

► The problem has its origin in the empirical nature of existing methods for the chemical determination of plant lignin. It is generally recognized that the… (more)

Subjects/Keywords: Lignin.

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APA (6^th Edition):

MacDougall, D. (1944). Studies on the chemical determination of plant lignin. (Doctoral Dissertation). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile126038.pdf

Chicago Manual of Style (16^th Edition):

MacDougall, Daniel. “Studies on the chemical determination of plant lignin.” 1944. Doctoral Dissertation, McGill University. Accessed October 19, 2019. http://digitool.library.mcgill.ca/thesisfile126038.pdf.

MLA Handbook (7^th Edition):

MacDougall, Daniel. “Studies on the chemical determination of plant lignin.” 1944. Web. 19 Oct 2019.

Vancouver:

MacDougall D. Studies on the chemical determination of plant lignin. [Internet] [Doctoral dissertation]. McGill University; 1944. [cited 2019 Oct 19]. Available from: http://digitool.library.mcgill.ca/thesisfile126038.pdf.

Council of Science Editors:

MacDougall D. Studies on the chemical determination of plant lignin. [Doctoral Dissertation]. McGill University; 1944. Available from: http://digitool.library.mcgill.ca/thesisfile126038.pdf

McGill University

20. Mirshokraie, S. Ahmad (Seyed Ahmad). Reactions of lignin model compounds under alkaline pulping conditions.

Degree: MS, Department of Chemistry., 1986, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile65410.pdf

Subjects/Keywords: Lignin

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APA (6^th Edition):

Mirshokraie, S. A. (. A. (1986). Reactions of lignin model compounds under alkaline pulping conditions. (Masters Thesis). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile65410.pdf

Chicago Manual of Style (16^th Edition):

Mirshokraie, S Ahmad (Seyed Ahmad). “Reactions of lignin model compounds under alkaline pulping conditions.” 1986. Masters Thesis, McGill University. Accessed October 19, 2019. http://digitool.library.mcgill.ca/thesisfile65410.pdf.

MLA Handbook (7^th Edition):

Mirshokraie, S Ahmad (Seyed Ahmad). “Reactions of lignin model compounds under alkaline pulping conditions.” 1986. Web. 19 Oct 2019.

Vancouver:

Mirshokraie SA(A. Reactions of lignin model compounds under alkaline pulping conditions. [Internet] [Masters thesis]. McGill University; 1986. [cited 2019 Oct 19]. Available from: http://digitool.library.mcgill.ca/thesisfile65410.pdf.

Council of Science Editors:

Mirshokraie SA(A. Reactions of lignin model compounds under alkaline pulping conditions. [Masters Thesis]. McGill University; 1986. Available from: http://digitool.library.mcgill.ca/thesisfile65410.pdf

Oregon State University

21. Rockhill, Robert Clayton. Fungal growth responses to a photooxidized sodium ligninsulfonate.

Degree: MS, Microbiology and Hygiene, 1970, Oregon State University

URL: http://hdl.handle.net/1957/46270

► Sodium ligninsulfonate, a water soluble wide-range molecular weight polymeric by-product of the paper pulping industry, is added as waste effluent to water ways or burned,… (more)

▼ Sodium ligninsulfonate, a water soluble wide-range molecular weight polymeric by-product of the paper pulping industry, is added as waste effluent to water ways or burned, causing extreme pollution. The polymer is highly resistant to biodegradation. Therefore, modification of the structure to a more readily biodegradable form would be desirable, to be able to use this material for economic recovery, such as single cell protein (SCP), or other useful products. The ideal method of alteration would be one which did not in itself lead to other unwanted waste products such as would be inherent in a chemical process. In this study a sodium ligninsulfonate, Marasperse CB, was phototreated using a mercury-vapor ultraviolet lamp. Parameters studied during photolysis were oxygen effects, initial starting pH, temperature and wavelength ranges. Analytical methods included total carbon, thin layer chromatography, spectrophotometry, and fungal dry weight. The photolyzed ligninsulfonate was then used as a growth substrate for an Aspergillus isolated from soil enrichment. Definitive improvement of ligninsulfonate biological availability was demonstrated after photo-treatment of initial pH 3, 7 and 12 solutions. The response of the Aspergillus isolate was substantiated by assays of substrate carbon before and after growth, dry weights in relation to photolysis treatment time, and semiquantitative thin layer chromatography. The highest fungal yield came from the initial pH3 solution followed closely by the initial pH 12 solution. The pH 7 solution was approximately 50 percent of the former two. The greatest loss of carbon after growth occurred in the pH 3 and 12 solutions. Thin layer chromatography showed that during irradiation three new components were formed and three existing components increased in concentration as irradiation times increased. All of these components were reduced below detection limits after use of the solution as a growth medium. Carbon retention after irradiation was greatest in the initial pH 3 and 12 solutions as compared to the pH 7 solution. Photolysis occurred most efficiently in the pH 3 solution with regard to time, fungal yield, carbon loss after growth, and substrate utilization efficiency (fungal dry weight/carbon utilized). Wavelengths less than 210 nm allowed the most rapid modification with wavelengths greater than 280 nm causing essentially no short-term change. Photolysis of the ligninsulfonate was found to be temperature independent and oxygen dependent, showing a true primary photodecomposition mode. Photo-treatment of ligninsulfonate and definitive fungal growth response to the irradiated solution suggests that this treatment could be applied to improve biodegradation of other recalcitrant structures as well. Advisors/Committee Members: Klein, D. A. (advisor).

Subjects/Keywords: Lignin

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APA (6^th Edition):

Rockhill, R. C. (1970). Fungal growth responses to a photooxidized sodium ligninsulfonate. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/46270

Chicago Manual of Style (16^th Edition):

Rockhill, Robert Clayton. “Fungal growth responses to a photooxidized sodium ligninsulfonate.” 1970. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/46270.

MLA Handbook (7^th Edition):

Rockhill, Robert Clayton. “Fungal growth responses to a photooxidized sodium ligninsulfonate.” 1970. Web. 19 Oct 2019.

Vancouver:

Rockhill RC. Fungal growth responses to a photooxidized sodium ligninsulfonate. [Internet] [Masters thesis]. Oregon State University; 1970. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/46270.

Council of Science Editors:

Rockhill RC. Fungal growth responses to a photooxidized sodium ligninsulfonate. [Masters Thesis]. Oregon State University; 1970. Available from: http://hdl.handle.net/1957/46270

22. Sidhu, Sudeep Singh. Enzymatic removal of lignin from plant materials: potential applications.

Degree: PhD, Crop and Soil Sciences, 2012, University of Georgia

URL: http://purl.galileo.usg.edu/uga_etd/sidhu_sudeep_s_201208_phd

► Lignin is the major contributor to lignocellulosic recalcitrance to microbial degradation. Lignin acts as a protective matrix making cellulosic and hemicellulosic components inaccessible to microbes,… (more)

▼ Lignin is the major contributor to lignocellulosic recalcitrance to microbial degradation. Lignin acts as a protective matrix making cellulosic and hemicellulosic components inaccessible to microbes, hence slowing down the decomposition process. My research involved application of laccase enzyme for lignin removal from lignocellulosic biomass and its impact on two different applications. Accumulation of excessive organic matter in the form of thatch layer in turfgrass systems is a major problem and is believed to be due to slow rate of organic matter decomposition. Experiments were conducted in this study to examine the effects of laccase treatment on thatch buildup in turf. Direct application of laccase at 2.06 units cm-2 on potted creeping bentgrass in greenhouse every two weeks for nine months demonstrated a 45 and 32% reduction in thatch layer and organic matter relative to control. Field experiments on creeping bentgrass to optimize rate and frequency of laccase application showed that laccase application at rate as low as 0.5 units cm-2 applied once every two weeks or at rate 2.0 units cm-2 once every twelve weeks was effective to reduce thatch when applied for six months. An 18-22% and 21-30% reduction in thatch layer was observed with bi-weekly application of laccase at 2.0 units cm-2 for a period of six months for bermudagrass and zoysiagrass, respectively. Lignin removal from lignocellulosic biomass is an essential pretreatment step in bioethanol production to increase accessibility of structural sugars. Experiments were conducted to examine the potential of using laccase in such pretreatment to remove lignin from bioethanol feedstock materials. Sweet sorghum and switchgrass were treated with laccase mediator system consisting of ABTS (2, 2'-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid), HBT (1-hydroxybenzotriazole), and violuric acid to optimize mediator concentration. A 25.5 and 24% lignin from sweet sorghum was removed at 1.88 and 1.25 mM concentration of HBT and violuric acid, respectively. In switchgrass, reduction of 28% lignin was observed at 0.63 mM concentration of violuric acid. Application of laccase has the potential to develop as a new method for thatch management. Future research is needed to determine the effectiveness of enzymatic pretreatment for improving the bioethanol production efficiency. Advisors/Committee Members: Paul Raymer.

Subjects/Keywords: Lignin

…7 LIGNIN-DEGRADING FUNGI… …169 VIII LIGNIN REMOVAL FROM SWEET SORGHUM AND SWITCHGRASS BIOMASS USING LACCASE MEDIATOR… …insoluble (LI), and total lignin (LT) content after two and nine months of… …x29;, and total lignin (LT) content after two and six months of different… …soluble lignin (LS), and acid-insoluble lignin (LI) content after first and…

5 more images…

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APA (6^th Edition):

Sidhu, S. S. (2012). Enzymatic removal of lignin from plant materials: potential applications. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/sidhu_sudeep_s_201208_phd

Chicago Manual of Style (16^th Edition):

Sidhu, Sudeep Singh. “Enzymatic removal of lignin from plant materials: potential applications.” 2012. Doctoral Dissertation, University of Georgia. Accessed October 19, 2019. http://purl.galileo.usg.edu/uga_etd/sidhu_sudeep_s_201208_phd.

MLA Handbook (7^th Edition):

Sidhu, Sudeep Singh. “Enzymatic removal of lignin from plant materials: potential applications.” 2012. Web. 19 Oct 2019.

Vancouver:

Sidhu SS. Enzymatic removal of lignin from plant materials: potential applications. [Internet] [Doctoral dissertation]. University of Georgia; 2012. [cited 2019 Oct 19]. Available from: http://purl.galileo.usg.edu/uga_etd/sidhu_sudeep_s_201208_phd.

Council of Science Editors:

Sidhu SS. Enzymatic removal of lignin from plant materials: potential applications. [Doctoral Dissertation]. University of Georgia; 2012. Available from: http://purl.galileo.usg.edu/uga_etd/sidhu_sudeep_s_201208_phd

University of British Columbia

23. Wu, Yeng-tsu. Intra-increment lignin content of five western Canadian coniferous woods .

Degree: 1964, University of British Columbia

URL: http://hdl.handle.net/2429/38358

► Lignin contents of extractive-free wood meals prepared from three adjacent rings of mature wood, sampled at breast height, of amabilis fir, Douglas fir, western red… (more)

▼ Lignin contents of extractive-free wood meals prepared from three adjacent rings of mature wood, sampled at breast height, of amabilis fir, Douglas fir, western red cedar, Sitka spruce, and western hemlock were determined according to the micro-method of Johnson, Moore and Zank. Each of three rings within each species was divided into six positions from earlywood to latewood. Wood meals of 40-80 mesh size were extracted successively with ethyl ether, absolute ethyl alcohol and hot-water, and then solubilized with acetyl bromide and absorbence was calibrated against Klason lignin values. Wood methoxyl content of these same samples had been studied previously. Lignin contents were found to be highly significantly different within positions of growth increments for amabilis fir, Douglas fir, western red cedar and Sitka spruce, but no significant difference was found for western hemlock. Highly significant difference was found between growth rings for western red cedar and similarly significant difference was found for Douglas fir. No significant differences were obtained between growth rings for the other three species, although a slight but definite increase in lignin content with age was observed. Highly significant differences were also found between species and for total averages of each position for the five species. Earlywoods were higher in lignin content than latewood in each species by: Douglas fir, 2.27%; amabilis fir, 2.06%; western red cedar, 1.28%; Sitka spruce, 1.08%; and western hemlock, 0.46%. Lignin contents for individual species were in the order of: western hemlock, 32.85% (32.36-34.04%); western red cedar, 31.23% (29.69-32.68%); amabilis fir, 27.51% (26.17-28.24%); Douglas fir, 26.48% (24.08-28.66%); and Sitka spruce, 25.81% (24.91-26.98%). The correlation coefficient testing association between lignin and wood methoxyl was highly significant for amabilis fir (0.971), Douglas fir (O.913) and western red cedar (0.684). Non-significant correlation occurred with Sitka spruce (0.467) and western hemlock (0.340). The relationship between lignin and wood methoxyl appeared independent of species. The non-lignin methoxyl contents for the five species were estimated and the results showed that these were also independent of species.

Subjects/Keywords: Lignin

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APA (6^th Edition):

Wu, Y. (1964). Intra-increment lignin content of five western Canadian coniferous woods . (Thesis). University of British Columbia. Retrieved from http://hdl.handle.net/2429/38358

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):

Wu, Yeng-tsu. “Intra-increment lignin content of five western Canadian coniferous woods .” 1964. Thesis, University of British Columbia. Accessed October 19, 2019. http://hdl.handle.net/2429/38358.

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

MLA Handbook (7^th Edition):

Wu, Yeng-tsu. “Intra-increment lignin content of five western Canadian coniferous woods .” 1964. Web. 19 Oct 2019.

Vancouver:

Wu Y. Intra-increment lignin content of five western Canadian coniferous woods . [Internet] [Thesis]. University of British Columbia; 1964. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/2429/38358.

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

Council of Science Editors:

Wu Y. Intra-increment lignin content of five western Canadian coniferous woods . [Thesis]. University of British Columbia; 1964. Available from: http://hdl.handle.net/2429/38358

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

Karlstad University

24. Botström, Julia. Biodieseltillverkning av lignin från pappers- och massaindustrin : Framställning, LCI och kostnadsanalys.

Degree: Science and Technology (starting 2013), 2015, Karlstad University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-38093

► Att minska användningen av petroleumbaserade bränslen och hitta förnybara alternativ till drivmedel rankas som en av de största utmaningar människan står inför. Tidigare försök… (more)

Subjects/Keywords: Lignin; Biodiesel

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APA (6^th Edition):

Botström, J. (2015). Biodieseltillverkning av lignin från pappers- och massaindustrin : Framställning, LCI och kostnadsanalys. (Thesis). Karlstad University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-38093

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):

Botström, Julia. “Biodieseltillverkning av lignin från pappers- och massaindustrin : Framställning, LCI och kostnadsanalys.” 2015. Thesis, Karlstad University. Accessed October 19, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-38093.

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

MLA Handbook (7^th Edition):

Botström, Julia. “Biodieseltillverkning av lignin från pappers- och massaindustrin : Framställning, LCI och kostnadsanalys.” 2015. Web. 19 Oct 2019.

Vancouver:

Botström J. Biodieseltillverkning av lignin från pappers- och massaindustrin : Framställning, LCI och kostnadsanalys. [Internet] [Thesis]. Karlstad University; 2015. [cited 2019 Oct 19]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-38093.

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

Council of Science Editors:

Botström J. Biodieseltillverkning av lignin från pappers- och massaindustrin : Framställning, LCI och kostnadsanalys. [Thesis]. Karlstad University; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-38093

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

25. Danupong Narapakdeesakul. Extraction, Separation and application of lignin from oil palm empty fruit bunch for linearboard coating .

Degree: คณะอุตสาหกรรมเกษตร ภาควิชาเทคโนโลยีวัสดุภัณฑ์, 2013, Prince of Songkla University

URL: http://kb.psu.ac.th/psukb/handle/2010/9579

Subjects/Keywords: Lignin

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

APA (6^th Edition):

Narapakdeesakul, D. (2013). Extraction, Separation and application of lignin from oil palm empty fruit bunch for linearboard coating . (Thesis). Prince of Songkla University. Retrieved from http://kb.psu.ac.th/psukb/handle/2010/9579

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):

Narapakdeesakul, Danupong. “Extraction, Separation and application of lignin from oil palm empty fruit bunch for linearboard coating .” 2013. Thesis, Prince of Songkla University. Accessed October 19, 2019. http://kb.psu.ac.th/psukb/handle/2010/9579.

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

MLA Handbook (7^th Edition):

Narapakdeesakul, Danupong. “Extraction, Separation and application of lignin from oil palm empty fruit bunch for linearboard coating .” 2013. Web. 19 Oct 2019.

Vancouver:

Narapakdeesakul D. Extraction, Separation and application of lignin from oil palm empty fruit bunch for linearboard coating . [Internet] [Thesis]. Prince of Songkla University; 2013. [cited 2019 Oct 19]. Available from: http://kb.psu.ac.th/psukb/handle/2010/9579.

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

Council of Science Editors:

Narapakdeesakul D. Extraction, Separation and application of lignin from oil palm empty fruit bunch for linearboard coating . [Thesis]. Prince of Songkla University; 2013. Available from: http://kb.psu.ac.th/psukb/handle/2010/9579

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

University of Arizona

26. Ciaramitaro, David Alexander, 1946-. THE SYNTHESIS AND REACTIONS OF LIGNIN MODEL COMPOUNDS .

Degree: 1974, University of Arizona

URL: http://hdl.handle.net/10150/288201

Subjects/Keywords: Lignin.

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

APA (6^th Edition):

Ciaramitaro, David Alexander, 1. (1974). THE SYNTHESIS AND REACTIONS OF LIGNIN MODEL COMPOUNDS . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/288201

Chicago Manual of Style (16^th Edition):

Ciaramitaro, David Alexander, 1946-. “THE SYNTHESIS AND REACTIONS OF LIGNIN MODEL COMPOUNDS .” 1974. Doctoral Dissertation, University of Arizona. Accessed October 19, 2019. http://hdl.handle.net/10150/288201.

MLA Handbook (7^th Edition):

Ciaramitaro, David Alexander, 1946-. “THE SYNTHESIS AND REACTIONS OF LIGNIN MODEL COMPOUNDS .” 1974. Web. 19 Oct 2019.

Vancouver:

Ciaramitaro, David Alexander 1. THE SYNTHESIS AND REACTIONS OF LIGNIN MODEL COMPOUNDS . [Internet] [Doctoral dissertation]. University of Arizona; 1974. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10150/288201.

Council of Science Editors:

Ciaramitaro, David Alexander 1. THE SYNTHESIS AND REACTIONS OF LIGNIN MODEL COMPOUNDS . [Doctoral Dissertation]. University of Arizona; 1974. Available from: http://hdl.handle.net/10150/288201

Rhodes University

27. Madikane, Mzekelo. Biosulphidogenic hydrolysis of lignin and lignin model compounds.

Degree: Faculty of Science, Biochemistry, Microbiology and Biotechnology, 2002, Rhodes University

URL: http://hdl.handle.net/10962/d1003976

► Lignin degradation under biosulphidogenic conditions has not been extensively reported in the literature. Although aerobic degradation of lignin is well documented, anaerobic biodegradation has focused… (more)

▼ Lignin degradation under biosulphidogenic conditions has not been extensively reported in the literature. Although aerobic degradation of lignin is well documented, anaerobic biodegradation has focused mainly on methanogenic systems with biosulphidogenic systems receiving less attention. Sulphate reducing bacteria are known to generate moderately high levels of both sulphide and alkalinity at room temperatures, and these conditions draw some comparison with the Kraft pulping process. In the Kraft pulping process, lignin is degraded chemically at ±170°C under high sulphide and alkaline conditions and may provide a model for understanding biosulphidogenic lignin degrading activity. The aim of this study was to investigate the biosulphidogenic hydrolysis of lignin within the context of the chemical and biological conditions generated by a mixed sulphate reducing bacteria consortia. Bioreactor studies with a mixed sulphate reducing consortia and pine wood powder (both untreated and depectinated) resulted in the generation of comparable levels of sulphide and alkalinity used in the chemical hydrolysis studies. Aromatic compound yields were between 20 to 50% of the chemical hydrolysis studies. This fluctuation may have been due to the utilization of these aromatic compounds as electron donors by the sulphate reducing consortia as evidenced by the high rate of sulphate reduction in both the untreated and depectinated wood bioreactors. Biodegradation of lignin model compounds was investigated in order to elucidate lignin degradation mechanisms. Both mono-aromatic and dimeric lignin model compounds were used as electron donors and carbon sources for the mixed sulphate reducing consortia. Biodegradation and mass spectrometer analysis of mono-aromatic compounds, ferulic acid and ferulic acid ethyl ester resulted in the production of intermediates such as catechol, cyclohexane carboxylic acid and adipic acid. These intermediates were also observed in the degradation of dimeric ferulic acid. Biodegradation of salicin resulted in the production of salicyl alcohol, ortho-cresol and acetate. Biodegradation of benzylic ether resulted in the production of vanillin and acetate as end products. The results of these studies provide evidence for a biosulphidogenic hydrolysis of lignin, and also the utilisation of lignin-derived aromatic compounds as electron donor sources, by a mixed sulphate reducing consortia.

Subjects/Keywords: Lignin; Lignin – Biodegradation

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APA (6^th Edition):

Madikane, M. (2002). Biosulphidogenic hydrolysis of lignin and lignin model compounds. (Thesis). Rhodes University. Retrieved from http://hdl.handle.net/10962/d1003976

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):

Madikane, Mzekelo. “Biosulphidogenic hydrolysis of lignin and lignin model compounds.” 2002. Thesis, Rhodes University. Accessed October 19, 2019. http://hdl.handle.net/10962/d1003976.

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

MLA Handbook (7^th Edition):

Madikane, Mzekelo. “Biosulphidogenic hydrolysis of lignin and lignin model compounds.” 2002. Web. 19 Oct 2019.

Vancouver:

Madikane M. Biosulphidogenic hydrolysis of lignin and lignin model compounds. [Internet] [Thesis]. Rhodes University; 2002. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10962/d1003976.

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

Council of Science Editors:

Madikane M. Biosulphidogenic hydrolysis of lignin and lignin model compounds. [Thesis]. Rhodes University; 2002. Available from: http://hdl.handle.net/10962/d1003976

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

University of Manchester

28. Musharah, Amani Hassan K. Gold-Catalysed Oxidation of Lignin-Derived Building Blocks.

Degree: 2016, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:300446

►

The use of heterogeneous catalysts containing Au nanoparticles supported on TiO2 has been explored for oxidative aqueous phase transformations of sustainable phenolic and benzoic acid… (more)

▼

The use of heterogeneous catalysts containing Au nanoparticles supported on TiO2 has been explored for oxidative aqueous phase transformations of sustainable phenolic and benzoic acid derivatives that can be obtained from lignin. Au/TiO2 catalysts were chosen because of their high activity for ambient pressure oxidations of gas phase species, and because their synthesis is facile and reproducible through a modified deposition-precipitation method. The aerobic oxidation of syringic, vanillic, and ferulic acid as well as of guaiacol, eugenol and anisole was investigated at temperatures up to 70°C under (i) atmospheric air sparging in an open reactor and (ii) at 10 atm air pressure in a closed reactor system. The catalysts were characterised by Transmission Electron Microscopy (TEM), Inductively Coupled Plasma (ICP) Optical Emission Spectroscopy and the reproducibility of their catalytic activity independently monitored by determining their activity for carbon monoxide oxidation in a gas flow reactor.The oxidation of syringic acid, vanillic acid, ferulic acid over Au/TiO2 resulted in the formation of 2,6-dimethoxy benzoquinone, guaiacol, and vanillin, respectively, indicating high selectivity for decarboxylation followed by selective oxidation at the position releasing the leaving group. Guaiacol was found to form tetraguaiacol, while eugenol produced quinone methide. Generally, higher air pressure strongly accelerated the transformations, indicating that availability of oxidants formed from O2 is the rate limiting step in the observed transformations. No transformations took place when O2 was excluded from the systems. Overall, guaiacol was found to react fastest, followed by syringic acid, ferulic acid, then vanillic acid. Anisole was found to be unreactive, even at elevated air pressure. The overall reaction pattern emerging from these studies is that the aerobic oxidation in the presence of Au/TiO2 mimics known biotransformations, for example peroxidase-catalysed oxidations involving H2O2.To assess how the functional groups on the aromatic ring influence reactivity the oxidation of p-hydroxybenzoic acid and of 2,6-dimethoxybenzoic acid was also assessed. It was found that decarboxylation of p-hydroxybenzoic acid proceeds, albeit rather slowly, forming phenol, with no further oxidation to hydroquinone or benzoquinone. Taken together these results indicate that the methoxy moieties influence reactivity through both their inductive and resonance effects: leaving of the carboxylic acid group appears to be enhanced through the inductive effect, while further oxidation at the phenolic site seems to be activated through the resonance effect in ortho-position. In line with this hypothesis, it was recently found that dimethoxybenzoic acid converts fast.

None

Advisors/Committee Members: SCHROEDER, SVEN SLM, CLAYDEN, JONATHAN JP, Schroeder, Sven, Clayden, Jonathan, Turner, Nicholas.

Subjects/Keywords: Lignin; Gold catalyst

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APA (6^th Edition):

Musharah, A. H. K. (2016). Gold-Catalysed Oxidation of Lignin-Derived Building Blocks. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:300446

Chicago Manual of Style (16^th Edition):

Musharah, Amani Hassan K. “Gold-Catalysed Oxidation of Lignin-Derived Building Blocks.” 2016. Doctoral Dissertation, University of Manchester. Accessed October 19, 2019. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:300446.

MLA Handbook (7^th Edition):

Musharah, Amani Hassan K. “Gold-Catalysed Oxidation of Lignin-Derived Building Blocks.” 2016. Web. 19 Oct 2019.

Vancouver:

Musharah AHK. Gold-Catalysed Oxidation of Lignin-Derived Building Blocks. [Internet] [Doctoral dissertation]. University of Manchester; 2016. [cited 2019 Oct 19]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:300446.

Council of Science Editors:

Musharah AHK. Gold-Catalysed Oxidation of Lignin-Derived Building Blocks. [Doctoral Dissertation]. University of Manchester; 2016. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:300446

University of Ottawa

29. Chen, Wei-Ching. Selective Oxidation of Lignin Models and Extracts with Earth-Abundant Transition Metals and Hypervalent Iodine .

Degree: 2015, University of Ottawa

URL: http://hdl.handle.net/10393/32181

► As a significant component of lignocellulosic biomass, lignin represents a potential source of value-added aromatic chemicals. In this thesis, catalytic systems with earth-abundant metal catalysts… (more)

Subjects/Keywords: Lignin; Oxidation; Depolymerization

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APA (6^th Edition):

Chen, W. (2015). Selective Oxidation of Lignin Models and Extracts with Earth-Abundant Transition Metals and Hypervalent Iodine . (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/32181

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):

Chen, Wei-Ching. “Selective Oxidation of Lignin Models and Extracts with Earth-Abundant Transition Metals and Hypervalent Iodine .” 2015. Thesis, University of Ottawa. Accessed October 19, 2019. http://hdl.handle.net/10393/32181.

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

MLA Handbook (7^th Edition):

Chen, Wei-Ching. “Selective Oxidation of Lignin Models and Extracts with Earth-Abundant Transition Metals and Hypervalent Iodine .” 2015. Web. 19 Oct 2019.

Vancouver:

Chen W. Selective Oxidation of Lignin Models and Extracts with Earth-Abundant Transition Metals and Hypervalent Iodine . [Internet] [Thesis]. University of Ottawa; 2015. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10393/32181.

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

Council of Science Editors:

Chen W. Selective Oxidation of Lignin Models and Extracts with Earth-Abundant Transition Metals and Hypervalent Iodine . [Thesis]. University of Ottawa; 2015. Available from: http://hdl.handle.net/10393/32181

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

Georgia Tech

30. Faraji Mosalman, Mozhdeh Sadat. From experimental observations to a functional model of the lignin pathway: Computational modeling reveals new insights.

Degree: PhD, Mechanical Engineering, 2018, Georgia Tech

URL: http://hdl.handle.net/1853/59881

► Lignin is a natural polymer that is interwoven with cellulose and hemicellulose within plant cell walls. Due to this molecular arrangement, lignin is a major… (more)

Subjects/Keywords: Lignin; Computational modeling

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APA (6^th Edition):

Faraji Mosalman, M. S. (2018). From experimental observations to a functional model of the lignin pathway: Computational modeling reveals new insights. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/59881

Chicago Manual of Style (16^th Edition):

Faraji Mosalman, Mozhdeh Sadat. “From experimental observations to a functional model of the lignin pathway: Computational modeling reveals new insights.” 2018. Doctoral Dissertation, Georgia Tech. Accessed October 19, 2019. http://hdl.handle.net/1853/59881.

MLA Handbook (7^th Edition):

Faraji Mosalman, Mozhdeh Sadat. “From experimental observations to a functional model of the lignin pathway: Computational modeling reveals new insights.” 2018. Web. 19 Oct 2019.

Vancouver:

Faraji Mosalman MS. From experimental observations to a functional model of the lignin pathway: Computational modeling reveals new insights. [Internet] [Doctoral dissertation]. Georgia Tech; 2018. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1853/59881.

Council of Science Editors:

Faraji Mosalman MS. From experimental observations to a functional model of the lignin pathway: Computational modeling reveals new insights. [Doctoral Dissertation]. Georgia Tech; 2018. Available from: http://hdl.handle.net/1853/59881

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