subject:(arsenic)

University of Georgia

1. Burgess, Elizabeth Adrienne. Geomicrobiological description of two contemporary hydrothermal pools in Uzon Caldera, Kamchatka, Russia, as models for sulfur biogeochemistry.

Degree: PhD, Microbiology, 2009, University of Georgia

URL: http://purl.galileo.usg.edu/uga_etd/burgess_elizabeth_a_200912_phd

► The combination of geological activity and geographic isolation make Uzon Caldera, Kamchatka, Russia, an ideal location for geomicrobiological research. Two hydrothermal pools, Arkashin Shurf (Arkashin)… (more)

▼ The combination of geological activity and geographic isolation make Uzon Caldera, Kamchatka, Russia, an ideal location for geomicrobiological research. Two hydrothermal pools, Arkashin Shurf (Arkashin) and Zavarzin Spring (Zavarzin), were selected for geochemical and microbiological characterization over multiple years and scales. Arkashin has high arsenic concentrations relative to Zavarzin, which has abundant elemental sulfur. Grab samples were analyzed from a geomicrobiological perspective, to describe community structure in each pool based on sequence, lipid and stable isotope data. Based on sequence analysis and lipid distribution, Arkashin was inhabited by Hydrogenobaculum-related primary producers. Other community members included Desulfurella-, “Sphingobacteria“- and Variovorax-related microorganisms. Zavarzin was dominated by Chloroflexus, and heterotrophic microorganisms, including some Crenarchaeota. The community in Zavarzin was more diverse than in Arkashin. Additionally, nearly 20% of the sequences from Arkashin and over 50% of the sequences from Zavarzin represented uncultured and unclassified microorganisms. Core sample analyses indicated that in each pool the microbiology and geochemistry changed with depth over visible changes in color and texture. Surface sub-samples were similar to the grab samples. Autotrophic surface communities were replaced with microorganisms dependent on heterotrophic inputs or reduced hydrothermal carbon as depth increased. In Arkashin, variation in color of strata was associated with varying concentrations of As and S. The highest As and S concentrations were associated with the lowest concentrations of phospholipid fatty acids (PLFA). In Zavarzin, the highest sulfur and PLFA concentrations were associated with fine-textured surface samples. The patterns observed indicate the biomass and composition of microbial communities can shift considerably in association with macroscopically visible changes in geochemical conditions. The described geomicrobiological data represent sulfur biogeochemistry under distinct geochemical conditions. As- and S-concentrations are linked significantly in Arkashin. The microorganisms in Arkashin play a role in As-S cycling, in part through sulfate-reduction. In Zavarzin, elemental sulfur is abundant and sulfide from sulfate-reduction is a minor component of total sulfur concentrations. Cataloging the diversity and distribution of microorganisms in contemporary thermal environments and elucidating some of the variations that occur with depth at the edges of hydrothermal pools add to knowledge about the intersection of geochemistry and microbiology. Advisors/Committee Members: Juergen Wiegel.

Subjects/Keywords: arsenic

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APA (6^th Edition):

Burgess, E. A. (2009). Geomicrobiological description of two contemporary hydrothermal pools in Uzon Caldera, Kamchatka, Russia, as models for sulfur biogeochemistry. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/burgess_elizabeth_a_200912_phd

Chicago Manual of Style (16^th Edition):

Burgess, Elizabeth Adrienne. “Geomicrobiological description of two contemporary hydrothermal pools in Uzon Caldera, Kamchatka, Russia, as models for sulfur biogeochemistry.” 2009. Doctoral Dissertation, University of Georgia. Accessed July 20, 2019. http://purl.galileo.usg.edu/uga_etd/burgess_elizabeth_a_200912_phd.

MLA Handbook (7^th Edition):

Burgess, Elizabeth Adrienne. “Geomicrobiological description of two contemporary hydrothermal pools in Uzon Caldera, Kamchatka, Russia, as models for sulfur biogeochemistry.” 2009. Web. 20 Jul 2019.

Vancouver:

Burgess EA. Geomicrobiological description of two contemporary hydrothermal pools in Uzon Caldera, Kamchatka, Russia, as models for sulfur biogeochemistry. [Internet] [Doctoral dissertation]. University of Georgia; 2009. [cited 2019 Jul 20]. Available from: http://purl.galileo.usg.edu/uga_etd/burgess_elizabeth_a_200912_phd.

Council of Science Editors:

Burgess EA. Geomicrobiological description of two contemporary hydrothermal pools in Uzon Caldera, Kamchatka, Russia, as models for sulfur biogeochemistry. [Doctoral Dissertation]. University of Georgia; 2009. Available from: http://purl.galileo.usg.edu/uga_etd/burgess_elizabeth_a_200912_phd

Queens University

2. Opio, Faith. Investigation of Fe(III)-As(III) bearing phases and their potential for arsenic disposal .

Degree: Mining Engineering, 2013, Queens University

URL: http://hdl.handle.net/1974/7798

► Fe(III)-As(III) bearing precipitates have been successfully used for arsenic immobilization in copper smelter weak acid effluents. However, knowledge on their precise characteristics is very limited… (more)

▼ Fe(III)-As(III) bearing precipitates have been successfully used for arsenic immobilization in copper smelter weak acid effluents. However, knowledge on their precise characteristics is very limited compared to ferric arsenate precipitates which are the preferred disposal option. As(III) is the dominant arsenic species in the weak acid effluents, and high costs are incurred in oxidizing As(III) to As(V) prior to ferric arsenate precipitation. Detailed characterization of Fe(III)-As(III) bearing residues is fundamental for accurate prediction of their long term stability. Synchrotron-based analysis of the Fe(III)-As(III) bearing precipitates from the effluent treatment plant (ETP) at Xstrata’s Horne Copper Smelter in Quebec identified ferric arsenate and gypsum as the major phases, and other minor phases including zinc hydroxide and franklinite. The predominant As species was As(V) which accounted for 49 to 84% of the total As in the Horne ETP sample. The high As(V) levels detected in the Horne ETP co-precipitates may be due to the partial oxidation of As(III) during prolonged storage, prior to synchrotron analysis. Tooeleite was investigated as an alternative potential disposal option for As(III) immobilization from copper smelter weak acid effluents. Lime neutralization of an equimolar Fe(III)-As(III) bearing weak acid solution resulted in about 85% As being removed at pH 2.7 and the formation of gypsum-bearing tooeleite at pH 2 to 3.5. At >pH 4, the rapid transformation of tooeleite occurred to form a poorly crystalline equimolar ferric arsenite which was stable at pH 6 to 10. Co-precipitation tests also showed that equimolar ferric arsenite was precipitated at pH>4. US EPA Toxicity Characteristic Leaching Procedure (TCLP) analysis indicated that both tooeleite and ferric arsenite have relatively high As solubilities. Calcination of tooeleite was explored as a method for improving the stability of tooeleite, and calcination of tooeleite in air at 600˚C produced a ferric arsenate calcine with a TCLP solubility of <5 mg/L As. The calcine iii produced from the lime-precipitated tooeleite at 600 ˚C was found to contain an iron arsenate (Fe7As6O24) which had a slightly higher TCLP As solubility of 13.1 mg/L. The precipitation of tooeleite from an As(III)-bearing weak acid and calcination of the resultant precipitate may offer a new process for As(III) fixation from copper smelter weak acid effluents.

Subjects/Keywords: Arsenic

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APA (6^th Edition):

Opio, F. (2013). Investigation of Fe(III)-As(III) bearing phases and their potential for arsenic disposal . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/7798

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):

Opio, Faith. “Investigation of Fe(III)-As(III) bearing phases and their potential for arsenic disposal .” 2013. Thesis, Queens University. Accessed July 20, 2019. http://hdl.handle.net/1974/7798.

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

MLA Handbook (7^th Edition):

Opio, Faith. “Investigation of Fe(III)-As(III) bearing phases and their potential for arsenic disposal .” 2013. Web. 20 Jul 2019.

Vancouver:

Opio F. Investigation of Fe(III)-As(III) bearing phases and their potential for arsenic disposal . [Internet] [Thesis]. Queens University; 2013. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/1974/7798.

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

Council of Science Editors:

Opio F. Investigation of Fe(III)-As(III) bearing phases and their potential for arsenic disposal . [Thesis]. Queens University; 2013. Available from: http://hdl.handle.net/1974/7798

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

Washington University in St. Louis

3. Wan, Wei. Arsenic Removal From Drinking Water By Electrocoagulation.

Degree: MA, Energy, Environmental and Chemical Engineering, 2010, Washington University in St. Louis

URL: https://openscholarship.wustl.edu/etd/511

► Exposure to arsenic through drinking water poses a threat to human health. Electrocoagulation is an emerging water treatment technology that involves electrolytic oxidation of anode… (more)

Subjects/Keywords: arsenic

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APA (6^th Edition):

Wan, W. (2010). Arsenic Removal From Drinking Water By Electrocoagulation. (Thesis). Washington University in St. Louis. Retrieved from https://openscholarship.wustl.edu/etd/511

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):

Wan, Wei. “Arsenic Removal From Drinking Water By Electrocoagulation.” 2010. Thesis, Washington University in St. Louis. Accessed July 20, 2019. https://openscholarship.wustl.edu/etd/511.

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

MLA Handbook (7^th Edition):

Wan, Wei. “Arsenic Removal From Drinking Water By Electrocoagulation.” 2010. Web. 20 Jul 2019.

Vancouver:

Wan W. Arsenic Removal From Drinking Water By Electrocoagulation. [Internet] [Thesis]. Washington University in St. Louis; 2010. [cited 2019 Jul 20]. Available from: https://openscholarship.wustl.edu/etd/511.

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

Council of Science Editors:

Wan W. Arsenic Removal From Drinking Water By Electrocoagulation. [Thesis]. Washington University in St. Louis; 2010. Available from: https://openscholarship.wustl.edu/etd/511

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

Queens University

4. Bromstad, MacKenzie Jane. The characterization, persistence, and bioaccessibility of roaster-derived arsenic in surface soils at Giant Mine, Yellowknife, NT .

Degree: Geological Sciences and Geological Engineering, 2011, Queens University

URL: http://hdl.handle.net/1974/6885

► Approximately 20,000 tonnes of arsenic (As)-bearing emissions from roasting arsenopyrite ore were aerially released from 1949-1999 at Giant Mine, located outside Yellowknife, NT. As part… (more)

▼ Approximately 20,000 tonnes of arsenic (As)-bearing emissions from roasting arsenopyrite ore were aerially released from 1949-1999 at Giant Mine, located outside Yellowknife, NT. As part of the process used to free refractory gold (Au) from arsenopyrite (FeAsS), roasting created As-bearing roaster off-gases that condensed into As2O3, one of the most toxic As compounds to humans. Roaster emissions also contained some As-bearing iron (Fe)- oxides. Arsenic emission controls were first implemented in 1951, and by the time the emission control process was completely refined in 1963, 86% of the total aerial As emissions at Giant had been released into the surrounding area. The continued presence of roaster-derived As2O3 in surface soils at Giant has been previously documented despite its theoretical instability in oxidizing surface environments. Wrye (2008) found As concentrations in roaster-affected soils occurring on rock outcrop (covering ~30% of the Giant property) greater than in many other surface soils; most outcrop soils were not considered when delineating areas of contaminated material for future removal in the Giant Mine Remediation Plan (currently undergoing environmental assessment). To investigate roaster-derived As persistence, outcrop soils and soil pore waters were analyzed. Comparing proportions of As, Sb, and Au concentrations in soil samples and historic As2O3-rich dust captured by emission controls show that most of the roaster-derived As in soils at Giant was likely deposited before 1964. Thin section examination has shown that while the vast majority of discrete As hosts in soils are As2O3, textural relationships and certain secondary As hosts in soils indicate that As2O3 is not static in surface soils and could be transforming over time, albeit very slowly. Bulk chemical relationships among As, antimony (Sb), and carbon support this. Topographic restriction by rock outcrops and dry, cold climate probably play a large role in elevated As concentrations and As2O3 persistence in outcrop soils. In light of possible future human exposure, As bioaccessibility from three adjacent samples was determined for synthetic human gastric (34%) and lung (18%) fluids.

Subjects/Keywords: geochemistry; arsenic; arsenic trioxide; geology

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APA (6^th Edition):

Bromstad, M. J. (2011). The characterization, persistence, and bioaccessibility of roaster-derived arsenic in surface soils at Giant Mine, Yellowknife, NT . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/6885

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):

Bromstad, MacKenzie Jane. “The characterization, persistence, and bioaccessibility of roaster-derived arsenic in surface soils at Giant Mine, Yellowknife, NT .” 2011. Thesis, Queens University. Accessed July 20, 2019. http://hdl.handle.net/1974/6885.

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

MLA Handbook (7^th Edition):

Bromstad, MacKenzie Jane. “The characterization, persistence, and bioaccessibility of roaster-derived arsenic in surface soils at Giant Mine, Yellowknife, NT .” 2011. Web. 20 Jul 2019.

Vancouver:

Bromstad MJ. The characterization, persistence, and bioaccessibility of roaster-derived arsenic in surface soils at Giant Mine, Yellowknife, NT . [Internet] [Thesis]. Queens University; 2011. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/1974/6885.

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

Council of Science Editors:

Bromstad MJ. The characterization, persistence, and bioaccessibility of roaster-derived arsenic in surface soils at Giant Mine, Yellowknife, NT . [Thesis]. Queens University; 2011. Available from: http://hdl.handle.net/1974/6885

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

5. Ezeh, Vivian Chibuzo. Design and synthesis of novel fluorescence constructs for the detection of environmental arsenic.

Degree: PhD, Chemistry, 2013, University of Georgia

URL: http://purl.galileo.usg.edu/uga_etd/ezeh_vivian_c_201308_phd

► Arsenic compounds are classified as group 1 carcinogens and the maximum contamination level in drinking water is set at 10 ppb by the United States… (more)

▼ Arsenic compounds are classified as group 1 carcinogens and the maximum contamination level in drinking water is set at 10 ppb by the United States Environmental Protection Agency. Methods currently approved for monitoring environmental arsenic are classified as colorimetric and instrumental methods. However, toxic byproducts (arsine gas and mercury) are formed in colorimetric methods, while instrumental methods require high maintenance costs. Therefore developing a sensitive, safe, and less expensive detection technique for arsenic is needed. One strategy involves the development of new imaging tools using small molecule fluorescent sensors, which will offer a sensitive and inexpensive method of arsenic detection in environmental samples. Emphasis will be on As(III) compounds because they are prevalent in the environment. To accomplish this goal, the coordination chemistry of As(III) was studied to discover new As(III) chemistry/preference for thiols. One finding from this work is the As(III)-promoted redox rearrangement of a benzothiazoline-containing compound to afford a four-coordinate As(III) complex and the benzothiazole analog. The knowledge gained was used to design two fluorescent chemodosimeters for As(III). The first generation sensors, named ArsenoFluors (AFs), were designed to contain a benzothiazoline functional group appended to a coumarin fluorescent reporter and were prepared in high yield by multi-step organic synthesis. The sensors react with As(III) to afford a highly fluorescent coumarin-6 dye (benzothiazole analog), which results in a 20 – 25 fold increase in fluorescence intensity and 0.14 – 0.23 ppb detection limit for As(III) in THF at 298 K. In addition, the reaction is complete within 30 min and is selective for As(III) over other toxic ions such as Hg(II) and Pb(II). The sensors also react with a common environmental species of As(III), namely sodium arsenite, in a THF/CHES (1:1, pH 9) buffer mixture. However, the reaction is slower (time > 5 h) and the enhancement of fluorescence is modest (1.5- to 3- fold) due to the quenching of the coumarin dye in a high polarity solvent. Finally, the mechanism for the As(III)-promoted formation of the fluorescent benzothiazole compounds from the benzothiazolines is proposed. Advisors/Committee Members: Todd C. Harrop.

Subjects/Keywords: Arsenic

…1 General Introduction to Arsenic… …1 Arsenic in the Environment… …10 Toxicity of Arsenic Compounds… …19 Regulation and Detection of Arsenic Compounds… …properties of arsenic (Å)…

12 more images…

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

APA (6^th Edition):

Ezeh, V. C. (2013). Design and synthesis of novel fluorescence constructs for the detection of environmental arsenic. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/ezeh_vivian_c_201308_phd

Chicago Manual of Style (16^th Edition):

Ezeh, Vivian Chibuzo. “Design and synthesis of novel fluorescence constructs for the detection of environmental arsenic.” 2013. Doctoral Dissertation, University of Georgia. Accessed July 20, 2019. http://purl.galileo.usg.edu/uga_etd/ezeh_vivian_c_201308_phd.

MLA Handbook (7^th Edition):

Ezeh, Vivian Chibuzo. “Design and synthesis of novel fluorescence constructs for the detection of environmental arsenic.” 2013. Web. 20 Jul 2019.

Vancouver:

Ezeh VC. Design and synthesis of novel fluorescence constructs for the detection of environmental arsenic. [Internet] [Doctoral dissertation]. University of Georgia; 2013. [cited 2019 Jul 20]. Available from: http://purl.galileo.usg.edu/uga_etd/ezeh_vivian_c_201308_phd.

Council of Science Editors:

Ezeh VC. Design and synthesis of novel fluorescence constructs for the detection of environmental arsenic. [Doctoral Dissertation]. University of Georgia; 2013. Available from: http://purl.galileo.usg.edu/uga_etd/ezeh_vivian_c_201308_phd

University of Alberta

6. Sun, Xuan. Arsenic Speciation in Poultry Kidney.

Degree: MS, Department of Chemistry, 2014, University of Alberta

URL: https://era.library.ualberta.ca/files/cf7623c68k

► An organoarsenic compound, 3-nitro-4-hydroxyphenyl arsenic acid (also known as Roxarsone), has been used as a feed additive. Roxarsone was approved by the Food and Drug… (more)

Subjects/Keywords: arsenic; kidney

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APA (6^th Edition):

Sun, X. (2014). Arsenic Speciation in Poultry Kidney. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/cf7623c68k

Chicago Manual of Style (16^th Edition):

Sun, Xuan. “Arsenic Speciation in Poultry Kidney.” 2014. Masters Thesis, University of Alberta. Accessed July 20, 2019. https://era.library.ualberta.ca/files/cf7623c68k.

MLA Handbook (7^th Edition):

Sun, Xuan. “Arsenic Speciation in Poultry Kidney.” 2014. Web. 20 Jul 2019.

Vancouver:

Sun X. Arsenic Speciation in Poultry Kidney. [Internet] [Masters thesis]. University of Alberta; 2014. [cited 2019 Jul 20]. Available from: https://era.library.ualberta.ca/files/cf7623c68k.

Council of Science Editors:

Sun X. Arsenic Speciation in Poultry Kidney. [Masters Thesis]. University of Alberta; 2014. Available from: https://era.library.ualberta.ca/files/cf7623c68k

Queens University

7. Fawcett, Skya. Speciation and mobility of Antimony and Arsenic in mine waste and the aqueous environment in the region of the Giant mine, Yellowknife, Canada .

Degree: Geological Sciences & Geological Engineering, 2009, Queens University

URL: http://hdl.handle.net/1974/1997

► Antimony is a potential human and ecosystem health risk, yet large gaps in the existing knowledge of the geochemical behaviour of Sb persist. At the… (more)

▼ Antimony is a potential human and ecosystem health risk, yet large gaps in the existing knowledge of the geochemical behaviour of Sb persist. At the Giant mine, an abandoned gold mine about to undergo remediation, Sb is elevated in mine waste and in downstream pond and stream sediments that have been impacted by mine waste. Gold at the Giant Mine, Yellowknife NT, is refractory, hosted in arsenopyrite (FeAsS) and pyrite (FeS2), and associated with stibnite (Sb2S3) and Sb-sulfosalts. The gold was liberated by roasting the ore which produced two arsenic (As) and antimony (Sb)-rich waste streams: calcine and electrostatic precipitator (ESP) residue. The roaster-derived As and Sb host phases, maghemite and hematite, are found in sediment, and are undergoing post-depositional transformations. Bulk and micro- X-ray Absorption Near Edge Spectroscopy (XANES) methods, and synchrotron-based micro-X-ray fluorescence (μXRF) and micro-X-ray diffraction (μXRD), were employed to characterize the Sb-host phases and determine the solid-phase speciation of Sb in mine waste and sediment. Antimony in mine waste is largely associated with roaster-derived maghemite and is hosted as Sb(III) and Sb(V). The bulk and μXANES analyses indicate a more prominent Sb(III) composition in the ESP residue, compared to the calcine. In the surficial and deeper sediment Sb(III) and Sb(V) bound to oxygen are present, as well as Sb(III) bound to sulfur in the deeper sediment. The presence of the Sb(III) bound to sulfur phase in the deeper sediment implies that Sb associated with the roaster oxides is destabilized, but subsequently precipitates as, or adsorbs onto, a sulfide. Furthermore, the preferential attenuation of the Sb(III) species likely accounts for the dominance of Sb(V) in pore-water at all three sites, and at all depths. Co-existing with the sulfur-bound Sb phases in the deeper, relatively reducing sediment, is a compositionally significant, and finely disseminated Sb(V) bound to oxygen phase. Antimony and As are often assumed to exhibit similar geochemical behaviour. This study offered an opportunity to compare the mobility of As and Sb since both are elevated in concentration in the environment and in mine waste. Arsenic and Sb exhibit similar geochemical behaviour in the upper 2cm, but the higher affinity of As for sorption sites results in dissimilar distribution in pore-water. Both elements undergo post-depositional reduction resulting in an increase in the mobility of As, and attenuation of Sb. Aquatic horsetails (Equisetum fluviatile) present in Baker Creek significantly reduces the mobility of both elements.

Subjects/Keywords: antimony; arsenic

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APA (6^th Edition):

Fawcett, S. (2009). Speciation and mobility of Antimony and Arsenic in mine waste and the aqueous environment in the region of the Giant mine, Yellowknife, Canada . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/1997

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):

Fawcett, Skya. “Speciation and mobility of Antimony and Arsenic in mine waste and the aqueous environment in the region of the Giant mine, Yellowknife, Canada .” 2009. Thesis, Queens University. Accessed July 20, 2019. http://hdl.handle.net/1974/1997.

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

MLA Handbook (7^th Edition):

Fawcett, Skya. “Speciation and mobility of Antimony and Arsenic in mine waste and the aqueous environment in the region of the Giant mine, Yellowknife, Canada .” 2009. Web. 20 Jul 2019.

Vancouver:

Fawcett S. Speciation and mobility of Antimony and Arsenic in mine waste and the aqueous environment in the region of the Giant mine, Yellowknife, Canada . [Internet] [Thesis]. Queens University; 2009. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/1974/1997.

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

Council of Science Editors:

Fawcett S. Speciation and mobility of Antimony and Arsenic in mine waste and the aqueous environment in the region of the Giant mine, Yellowknife, Canada . [Thesis]. Queens University; 2009. Available from: http://hdl.handle.net/1974/1997

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

University of Waikato

8. Lloyd, Nicholas. A Reinvestigation of Salvarsan and Related Arsenic Chemistry.

Degree: 2011, University of Waikato

URL: http://hdl.handle.net/10289/5460

► In 1910 the first deliberately targeted search for a new chemotherapeutic agent came to fruition when Paul Ehrlich introduced Salvarsan for the treatment of syphilis.… (more)

▼ In 1910 the first deliberately targeted search for a new chemotherapeutic agent came to fruition when Paul Ehrlich introduced Salvarsan for the treatment of syphilis. This thesis presents a detailed review of the history and literature leading up to and following on from Ehrlich’s discovery and thoroughly investigates the chemistry of Salvarsan and related species. A series of arylarsonic acids was prepared and fully characterised by electrospray mass spectrometry, NMR and X-ray crystallography for six examples. A detailed analysis of the hydrogen bonding in crystals of these molecules showed that they adopt several characteristic motifs which govern the packing in the crystals. Two of the examples containing NH2 groups crystallised as zwitterions while one NH2 containing example containing other bulky groups was is its molecular form. Salvarsan (cyclo 3-amino-4-hydroxyphenylarsenic(I)) was prepared by several different methods and analysed in detail using high resolution electrospray mass spectroscopy. This showed that Salvarsan consists of small cyclic species of the type (RAs)n where R is 3-NH2-4-OHC6H3 and n is three or greater. The dominant species in an aqueous solution of Salvarsan were found to be (RAs)3 and (RAs)5 . A detailed analysis is presented of impurities in Salvarsan prepared by different methods and also in a sample of original commercial Salvarsan. Mixtures of (RAs)n and (R’As)n exchange R groups in aqueous solution at room temperature, as shown by ESI-MS. ESI-MS studies are reported for the oxidation product of Salvarsan, RAs(OH)2 (commercially known as Mapharsen) and related As(III) compounds. Oligomers involving As-O-As linkages were found in solution and one tetrameric example (R = 3-NO2-4-OHC6H3) was isolated and structurally characterised. Preliminary ESI-MS studies showed that As(III) species bind to thioredoxin, a possible target for the pharmaceutical activity of Salvarsan and its derivatives. Advisors/Committee Members: Nicholson, Brian K (advisor), Morgan, Hugh W (advisor).

Subjects/Keywords: Salvarsan; Arsenic

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APA (6^th Edition):

Lloyd, N. (2011). A Reinvestigation of Salvarsan and Related Arsenic Chemistry. (Doctoral Dissertation). University of Waikato. Retrieved from http://hdl.handle.net/10289/5460

Chicago Manual of Style (16^th Edition):

Lloyd, Nicholas. “A Reinvestigation of Salvarsan and Related Arsenic Chemistry. ” 2011. Doctoral Dissertation, University of Waikato. Accessed July 20, 2019. http://hdl.handle.net/10289/5460.

MLA Handbook (7^th Edition):

Lloyd, Nicholas. “A Reinvestigation of Salvarsan and Related Arsenic Chemistry. ” 2011. Web. 20 Jul 2019.

Vancouver:

Lloyd N. A Reinvestigation of Salvarsan and Related Arsenic Chemistry. [Internet] [Doctoral dissertation]. University of Waikato; 2011. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/10289/5460.

Council of Science Editors:

Lloyd N. A Reinvestigation of Salvarsan and Related Arsenic Chemistry. [Doctoral Dissertation]. University of Waikato; 2011. Available from: http://hdl.handle.net/10289/5460

University of British Columbia

9. Bedford, Ronald Ernest. A study of the spark spectra of arsenic .

Degree: 1955, University of British Columbia

URL: http://hdl.handle.net/2429/40360

► The spectra of arsenic have been photographed from the infra-red to the vacuum ultraviolet with a 21 foot grating, a 2 metre vacuum grating, a… (more)

Subjects/Keywords: Arsenic

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APA (6^th Edition):

Bedford, R. E. (1955). A study of the spark spectra of arsenic . (Thesis). University of British Columbia. Retrieved from http://hdl.handle.net/2429/40360

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):

Bedford, Ronald Ernest. “A study of the spark spectra of arsenic .” 1955. Thesis, University of British Columbia. Accessed July 20, 2019. http://hdl.handle.net/2429/40360.

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

MLA Handbook (7^th Edition):

Bedford, Ronald Ernest. “A study of the spark spectra of arsenic .” 1955. Web. 20 Jul 2019.

Vancouver:

Bedford RE. A study of the spark spectra of arsenic . [Internet] [Thesis]. University of British Columbia; 1955. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/2429/40360.

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

Council of Science Editors:

Bedford RE. A study of the spark spectra of arsenic . [Thesis]. University of British Columbia; 1955. Available from: http://hdl.handle.net/2429/40360

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

Nelson Mandela Metropolitan University

10. Majavu, Avela. Modeling of arsenic removal from aqueous media using selected coagulants.

Degree: MTech, Faculty of Science, 2010, Nelson Mandela Metropolitan University

URL: http://hdl.handle.net/10948/d1017100

► The waste water from the industrial production of the herbicide monosodium methyl arsenate was treated using coagulation. The coagulation process as developed in this research… (more)

Subjects/Keywords: Arsenic wastes; Water – Purification – Arsenic removal; Coagulation

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APA (6^th Edition):

Majavu, A. (2010). Modeling of arsenic removal from aqueous media using selected coagulants. (Masters Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/d1017100

Chicago Manual of Style (16^th Edition):

Majavu, Avela. “Modeling of arsenic removal from aqueous media using selected coagulants.” 2010. Masters Thesis, Nelson Mandela Metropolitan University. Accessed July 20, 2019. http://hdl.handle.net/10948/d1017100.

MLA Handbook (7^th Edition):

Majavu, Avela. “Modeling of arsenic removal from aqueous media using selected coagulants.” 2010. Web. 20 Jul 2019.

Vancouver:

Majavu A. Modeling of arsenic removal from aqueous media using selected coagulants. [Internet] [Masters thesis]. Nelson Mandela Metropolitan University; 2010. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/10948/d1017100.

Council of Science Editors:

Majavu A. Modeling of arsenic removal from aqueous media using selected coagulants. [Masters Thesis]. Nelson Mandela Metropolitan University; 2010. Available from: http://hdl.handle.net/10948/d1017100

Oregon State University

11. Smitherman, Lauren L. Forensic Hydrogeography : Assessing Groundwater Arsenic Concentrations and Testing Methods within the Harney Basin, Oregon.

Degree: MS, Water Resources Science, 2015, Oregon State University

URL: http://hdl.handle.net/1957/57428

► Harney County contains defining characteristics of regions containing arsenic within the groundwater such as its location in the western United States, unique closed basin geography,… (more)

▼ Harney County contains defining characteristics of regions containing arsenic within the groundwater such as its location in the western United States, unique closed basin geography, complex geology, and seasonal groundwater level fluctuations. Confirmation of arsenic concentrations above the Maximum Contaminant Level Drinking Water Standard of 10 μg/L has been observed on a recurring basis. Private land owners within the Harney Basin solely depend on private wells for domestic, agricultural, and livestock water supply and are not required to test for or meet the 10 μg/L MCL water quality standards for public water systems, as established by the United States Environmental Protection Agency. The purpose of this study was to expand on previous arsenic investigations to determine if a relationship exists between arsenic occurrence and the geography, hydrology, and geology within the Harney Basin. The effects of well depth, latitude/longitude, and hydrogeologic units were analyzed to create a regional depiction of arsenic occurrence through a conceptual model. For each sample, total arsenic, pH, and conductivity was measured. A total of 140 samples were evaluated, 91 were integrated from previous studies and 49 were collected throughout the Harney Basin as part of this study. For each of the 49 samples collected in this study, total arsenic was quantified by Inductively Coupled Plasma Mass Spectrometry (ICP-MS), and semi-quantitative arsenic field screening tests were also performed for comparison. These data were used to determine if a link exists between groundwater arsenic occurrence, geology, and the source aquifer. The secondary purpose of this study was to assess the accuracy and precision of the field tests to inform the community if a more available and less-expensive option than ICP-MS could be used for routine monitoring. Data acquisition was challenging due to citizen concerns about anonymity, difficulty contacting land owners, and their perceived effects on land values. The analysis identified that arsenic contamination is widespread throughout the valley. While one hydrogeologic unit provided statistically higher concentrations of arsenic, there is no single clear geogenic source of arsenic. The results from the field test produced questionable results, with both overestimates and underestimates of concentrations compared with the ICP-MS analysis. The results of this research will be informative to groundwater users and public health officials and the results will be confidentially shared with stakeholders. Communities reliant on private well water with similar geologic characteristics may utilize this report to understand the importance of arsenic testing. Advisors/Committee Members: Jarvis, Todd (advisor), Kile, Molly (committee member).

Subjects/Keywords: Arsenic; Groundwater – Arsenic content – Oregon – Harney County

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

APA (6^th Edition):

Smitherman, L. L. (2015). Forensic Hydrogeography : Assessing Groundwater Arsenic Concentrations and Testing Methods within the Harney Basin, Oregon. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/57428

Chicago Manual of Style (16^th Edition):

Smitherman, Lauren L. “Forensic Hydrogeography : Assessing Groundwater Arsenic Concentrations and Testing Methods within the Harney Basin, Oregon.” 2015. Masters Thesis, Oregon State University. Accessed July 20, 2019. http://hdl.handle.net/1957/57428.

MLA Handbook (7^th Edition):

Smitherman, Lauren L. “Forensic Hydrogeography : Assessing Groundwater Arsenic Concentrations and Testing Methods within the Harney Basin, Oregon.” 2015. Web. 20 Jul 2019.

Vancouver:

Smitherman LL. Forensic Hydrogeography : Assessing Groundwater Arsenic Concentrations and Testing Methods within the Harney Basin, Oregon. [Internet] [Masters thesis]. Oregon State University; 2015. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/1957/57428.

Council of Science Editors:

Smitherman LL. Forensic Hydrogeography : Assessing Groundwater Arsenic Concentrations and Testing Methods within the Harney Basin, Oregon. [Masters Thesis]. Oregon State University; 2015. Available from: http://hdl.handle.net/1957/57428

Duquesne University

12. Reiter, Robert James. Microbial Arsenic Transformation in Near Subsurface Environments.

Degree: PhD, Biological Sciences, 2015, Duquesne University

URL: https://dsc.duq.edu/etd/1094

► In the first part of this study, environmental bacterial arsenic transformation was investigated in anthropogenically arsenic contaminated subsurface sediments from the former Vineland Chemical Company… (more)

▼ In the first part of this study, environmental bacterial arsenic transformation was investigated in anthropogenically arsenic contaminated subsurface sediments from the former Vineland Chemical Company in Vineland, NJ. Subsurface sediments from the vadose (371 mg/kg arsenic) and aquifer (81 mg/kg arsenic) zones and an off-site surface sediment (0.7 mg/kg arsenic; control) were used as inocula for enrichment cultures with selective media to assess for microbial arsenic metabolic activity. Arsenite (As(III)), monomethyl arsenic acid (MMA) and dimethyl arsenic acid (DMA) were provided as electron donors, while arsenate (As(V)) was provided as an electron acceptor. An anion exchange chromatography method with conductivity and UV/Vis detection was developed and utilized to investigate arsenic transformations under each selective condition. While demethylation and arsenite oxidation were not observed, there was strong As(V) reduction to As(III) activity in the enrichments amended with lactate and As(V). Polymerase chain reaction (PCR) was used to amplify arrA and arsC genes, followed by cloning and sequencing. Both vadose and aquifer enrichments gave positive results for arrA (respiratory arsenate reductase) and arsC (arsenic resistance), while only arsC amplified from the off-site. Both 16S rRNA genes and the ribosomal intergenic spacer (RIS) genes were used to assess community diversity. The results indicate a diverse community with As(V) respiring bacteria. In the second part of this study, the utility of ion chromatography (IC) in speciating inorganic (As(V), As(III)) and organic (MMA, DMA) was assessed. The As(V) and roxarsone respiring Alkaliphilus oremlandii OhILAs was cultured and the spent medium analyzed. Under the conditions used, OhILAs failed to produce any As(III) and As(V) when grown on roxarsone and lactate; however, As(V) to As(III) reduction was observed when grown in the presence of lactate and As(V). In the third part of this study, microcosms were used to assess bacterial arsenic transformation in cores from a coal ash impoundment. A medium was formulated based on the water chemistry of the system. As(V) respiration was detected at all four depths tested (0-2m; 2-4m, 4-6m, and 8-10m), with the surface sediments showing the greatest rates. Advisors/Committee Members: John Stolz, Partha Basu, Peter Castric, Nancy Trun.

Subjects/Keywords: DARP; ARM; Biogeochemical; Arsenic Transformation; Arsenic Mobilization

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

APA (6^th Edition):

Reiter, R. J. (2015). Microbial Arsenic Transformation in Near Subsurface Environments. (Doctoral Dissertation). Duquesne University. Retrieved from https://dsc.duq.edu/etd/1094

Chicago Manual of Style (16^th Edition):

Reiter, Robert James. “Microbial Arsenic Transformation in Near Subsurface Environments.” 2015. Doctoral Dissertation, Duquesne University. Accessed July 20, 2019. https://dsc.duq.edu/etd/1094.

MLA Handbook (7^th Edition):

Reiter, Robert James. “Microbial Arsenic Transformation in Near Subsurface Environments.” 2015. Web. 20 Jul 2019.

Vancouver:

Reiter RJ. Microbial Arsenic Transformation in Near Subsurface Environments. [Internet] [Doctoral dissertation]. Duquesne University; 2015. [cited 2019 Jul 20]. Available from: https://dsc.duq.edu/etd/1094.

Council of Science Editors:

Reiter RJ. Microbial Arsenic Transformation in Near Subsurface Environments. [Doctoral Dissertation]. Duquesne University; 2015. Available from: https://dsc.duq.edu/etd/1094

University of Dundee

13. Hands, Katherine J. Defining the mechanism of arsenic-induced degradation of PML.

Degree: PhD, 2012, University of Dundee

URL: http://hdl.handle.net/10588/a5b14b03-25b0-457f-8dd9-9facf98b6415

► Arsenic trioxide is a clinically effective treatment for the disease acute promyelocytic leukaemia (APL) which is caused by the chromosomal translocation t(15;17) which fuses the… (more)

▼ Arsenic trioxide is a clinically effective treatment for the disease acute promyelocytic leukaemia (APL) which is caused by the chromosomal translocation t(15;17) which fuses the promyelocytic leukaemia (PML) protein to the retinoic receptor alpha (RARa). The PML-RARa oncoprotein disrupts normal retinoic acid signalling and the function of PML nuclear bodies (PML-NBs), subnuclear protein complexes with roles in control of apoptosis and cellular senescence. Treatment with arsenic induces rapid post translational modification of PML and with the small ubiquitin like modifier (SUMO). SUMO modification of PML recruits the SUMO targeted ubiquitin E3 ligase RNF4 via four SUMO interaction motifs within the N-terminal region of RNF4. PML is then ubiquitylated and targeted for proteasomal degradation. In APL, these events trigger degradation of PML-RARa, curing the disease. To further investigate the process of arsenic induced degradation of PML, a high content siRNA screen was designed to monitor the fate of a YFP linked version of PML after siRNA mediated knockdown of components of the ubiquitin system and arsenic treatment. RNF4 depletion prior to arsenic treatment prevented PML degradation and resulted in accumulation of PML in large, bright PML-NBs. This was used as a positive control. A library of siRNAs targeting 1067 gene products were screened to identify those which perturbed the process of arsenic mediated degradation of PML, and those which affected the stability of PML in untreated cells. A number of putative hits were identified. Depletion of the cullin RING ligase scaffold CUL3, and the NEDD8 E3 ligase DCUN1D1 resulted in striking accumulation of PML, suggesting PML may be a substrate of a CUL3 RING ligase complex. Further experiments using the inhibitor of neddylation, MLN4924 support this hypothesis. PML is expressed as a various isoforms which encode a unique C-terminal region, due to alternative splicing. The second part of this study investigated the role of this variable C-terminal region in the response of the six major PML isoforms to arsenic treatment. Using a system in which only a single eYFP-linked PML isoform is expressed, differences in the localisation of PML isoforms following arsenic treatment were identified, with PML I, II and VI found to accumulate in the cytoplasm following arsenic treatment, whereas PML III, IV and V did not. A high content imaging assay identified PML V as the isoform most readily degraded following arsenic treatment, and PML IV as relatively resistant to degradation. Using siRNA it was demonstrated that arsenic induced degradation of all PML isoforms is dependent on the ubiquitin E3 ligase RNF4. Intriguingly, depletion of RNF4 resulted in marked accumulation of PML V, suggesting this isoform is an optimal substrate for RNF4. Thus the variable C-terminal domain influences the rate and location of degradation of PML isoforms following arsenic treatment.

Subjects/Keywords: PML; Arsenic; SUMO

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

APA (6^th Edition):

Hands, K. J. (2012). Defining the mechanism of arsenic-induced degradation of PML. (Doctoral Dissertation). University of Dundee. Retrieved from http://hdl.handle.net/10588/a5b14b03-25b0-457f-8dd9-9facf98b6415

Chicago Manual of Style (16^th Edition):

Hands, Katherine J. “Defining the mechanism of arsenic-induced degradation of PML.” 2012. Doctoral Dissertation, University of Dundee. Accessed July 20, 2019. http://hdl.handle.net/10588/a5b14b03-25b0-457f-8dd9-9facf98b6415.

MLA Handbook (7^th Edition):

Hands, Katherine J. “Defining the mechanism of arsenic-induced degradation of PML.” 2012. Web. 20 Jul 2019.

Vancouver:

Hands KJ. Defining the mechanism of arsenic-induced degradation of PML. [Internet] [Doctoral dissertation]. University of Dundee; 2012. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/10588/a5b14b03-25b0-457f-8dd9-9facf98b6415.

Council of Science Editors:

Hands KJ. Defining the mechanism of arsenic-induced degradation of PML. [Doctoral Dissertation]. University of Dundee; 2012. Available from: http://hdl.handle.net/10588/a5b14b03-25b0-457f-8dd9-9facf98b6415

University of Alberta

14. McKnight-Whitford, Anthony Nicholai. Arsenic Binding to Thiols and Applications to Electrospray Mass Spectrometry Detection.

Degree: PhD, Department of Chemistry, 2010, University of Alberta

URL: https://era.library.ualberta.ca/files/rf55z9287

► Arsenic is a widespread environmental contaminant whose toxicity depends on its valence and its chemical form. Arsenic species have been typically determined using high pressure… (more)

▼ Arsenic is a widespread environmental contaminant whose toxicity depends on its valence and its chemical form. Arsenic species have been typically determined using high pressure liquid chromatography coupled to inductively coupled plasma mass spectrometry (HPLC-ICPMS), however ICPMS cannot differentiate the co-eluting arsenic species. This thesis explores the use of electrospray mass spectrometry (ESI-MS) with HPLC separation for arsenic speciation and demonstrates applications of various HPLC-ESI-MS methods for the determination of toxicologically and environmentally relevant arsenic compounds. The trivalent arsenicals, such as arsenite (AsIII) and its metabolites monomethylarsonous acid (MMAIII) and dimethylarsinous acid (DMAIII) are not easily detected using ESI-MS due to their poor ionizability, but they are known to have high affinity for thiols. Thus, the easily ionizable dithiol dimercaptosuccinic acid (DMSA) was used to derivatize the trivalent arsenicals prior to ESI-MS. Selection of the derivatizing reaction was based on studies of arsenic-thiol interactions. An HPLC-ESI-MS/MS method was developed for the detection of derivatized AsIII, DMAIII and MMAIII and underivatized arsenate (AsV), monomethylarsonic acid (MMAV) and dimethylarsinic acid (DMAV), and was used to analyze multiple types of samples including urine, plasma and water. One set of groundwater samples from the site of a former pesticide manufacturing plant contained concentrations of MMAIII as high as 3.9-274 mg/L, the highest ever observed in the environment. Another HPLC-ESI-MS/MS method, without the need of derivatization, was developed for the detection of the toxic thio-arsenicals dimethylmonothioarsinic acid (DMMTAV) and monomethylmonothioarsonic acid (MMMTAV). DMMTAV was present in rat plasma and human urine and both DMMTAV and MMMTAV were detected in rat urine. The method of derivatization and ESI-MS/MS detection was extended to the speciation of inorganic SbIII and SbV. The use of the HPLC-ESI-MS/MS method using DMPS derivatization enabled the speciation of SbIII and SbV in water samples from mine waste.

Subjects/Keywords: Arsenic; ESI-MS

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APA (6^th Edition):

McKnight-Whitford, A. N. (2010). Arsenic Binding to Thiols and Applications to Electrospray Mass Spectrometry Detection. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/rf55z9287

Chicago Manual of Style (16^th Edition):

McKnight-Whitford, Anthony Nicholai. “Arsenic Binding to Thiols and Applications to Electrospray Mass Spectrometry Detection.” 2010. Doctoral Dissertation, University of Alberta. Accessed July 20, 2019. https://era.library.ualberta.ca/files/rf55z9287.

MLA Handbook (7^th Edition):

McKnight-Whitford, Anthony Nicholai. “Arsenic Binding to Thiols and Applications to Electrospray Mass Spectrometry Detection.” 2010. Web. 20 Jul 2019.

Vancouver:

McKnight-Whitford AN. Arsenic Binding to Thiols and Applications to Electrospray Mass Spectrometry Detection. [Internet] [Doctoral dissertation]. University of Alberta; 2010. [cited 2019 Jul 20]. Available from: https://era.library.ualberta.ca/files/rf55z9287.

Council of Science Editors:

McKnight-Whitford AN. Arsenic Binding to Thiols and Applications to Electrospray Mass Spectrometry Detection. [Doctoral Dissertation]. University of Alberta; 2010. Available from: https://era.library.ualberta.ca/files/rf55z9287

University of Alberta

15. Roggenbeck, Barbara A. Hepatobiliary Transport of Arsenic.

Degree: PhD, Department of Physiology, 2016, University of Alberta

URL: https://era.library.ualberta.ca/files/c1j92g751z

► Arsenic is a proven human carcinogen and associated with a myriad of other adverse health effects. This metalloid is methylated in human liver to monomethylarsonic… (more)

▼ Arsenic is a proven human carcinogen and associated with a myriad of other adverse health effects. This metalloid is methylated in human liver to monomethylarsonic acid (MMAV), monomethylarsonous acid (MMAIII), dimethylarsinic acid (DMAV), and dimethylarsinous acid (DMAIII) and eliminated predominantly in urine. Hepatic basolateral transport of As species is ultimately critical for urinary elimination; however, these pathways are not fully elucidated in humans. Based on rodent studies it appears that the ATP binding-cassette (ABC) transporters in subfamily, multidrug resistance proteins (MRPs/ABCCs), are likely to play a role in efflux of As out of the hepatocyte. The current studies use several techniques to identify MRPs that may be important for hepatobiliary transport of As. Sandwich cultured human hepatocytes (SCHH) were used as a physiological model to characterize hepatic efflux of As. Cytotoxicity assays were used to screen the basolateral MRP candidate proteins MRP3 (ABCC3) and MRP5 (ABCC5) for their ability to transport AsIII, AsV, MMAIII, MMAV, DMAIII, and DMAV. The data obtained from the SCHH studies, the cytotoxicity studies, and studies done with MRP4 (ABCC4) by other members of the lab led us to use RNA silencing to further investigate the role of MRP4 in the basolateral efflux of As. The SCHH model showed that basolateral transport of As was temperature- and GSH-dependent and inhibited by the MRP inhibitor MK-571. Canalicular efflux was completely lost after GSH depletion suggesting MRP2 (ABCC2)-dependence. Treatment of SCHH with AsIII (0.1-1 µM) dose-dependently increased MRP2 and MRP4 levels, but not MRP1 (ABCC1), MRP6 (ABCC6), or aquaglyceroporin 9. Treatment of SCHH with oltipraz (Nrf2 activator) increased MRP4 levels and basolateral efflux of As. In contrast, oltipraz increased MRP2 levels without increasing biliary excretion. These results suggest As basolateral transport prevails over biliary excretion and is mediated at least in part by an MRP. Candidate MRP proteins at the basolateral surface of the hepatocytes include MRP3, MRP4, MRP5, and MRP6. HEK293 cells overexpressing MRP3 or MRP5 did not confer resistance to AsIII, AsV, MMAIII, MMAV, DMAIII, or DMAV in cytotoxicity assays and provided evidence that MRP3 and MRP5 do not provide cellular protection against arsenicals. The role of MRP6 is under investigation. MRP4/ABCC4 is a high affinity transporter of DMAV and the diglutathione conjugate of MMAIII (MMA(GS)2), therefore, its role in As efflux was further investigated using RNA silencing in SCHH. Knockdown of MRP4 using shRNA containing lentiviral particles did not decrease the levels of any arsenicals in the efflux media of two SCHH preparations under the conditions tested. Non-specific effects of the lentivirus made interpretation of the RNA silencing experiments difficult however, we conclude that other transport proteins localized to the basolateral membrane of hepatocytes should be considered for their contribution to the efflux of As into blood for eventual urinary elimination.

Subjects/Keywords: hepatocytes; arsenic; transport

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

APA (6^th Edition):

Roggenbeck, B. A. (2016). Hepatobiliary Transport of Arsenic. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/c1j92g751z

Chicago Manual of Style (16^th Edition):

Roggenbeck, Barbara A. “Hepatobiliary Transport of Arsenic.” 2016. Doctoral Dissertation, University of Alberta. Accessed July 20, 2019. https://era.library.ualberta.ca/files/c1j92g751z.

MLA Handbook (7^th Edition):

Roggenbeck, Barbara A. “Hepatobiliary Transport of Arsenic.” 2016. Web. 20 Jul 2019.

Vancouver:

Roggenbeck BA. Hepatobiliary Transport of Arsenic. [Internet] [Doctoral dissertation]. University of Alberta; 2016. [cited 2019 Jul 20]. Available from: https://era.library.ualberta.ca/files/c1j92g751z.

Council of Science Editors:

Roggenbeck BA. Hepatobiliary Transport of Arsenic. [Doctoral Dissertation]. University of Alberta; 2016. Available from: https://era.library.ualberta.ca/files/c1j92g751z

The Ohio State University

16. Yi, Mengling. Arsenic Leaching From Spent Adsorbents Under Landfill Conditions.

Degree: MS, Environmental Science, 2009, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1250178204

► Implementation of the new arsenic MCL in 2006 will lead to the generation of an estimated 10,000 tons of arsenic bearing solid residuals (ABSRs) every… (more)

▼ Implementation of the new arsenic MCL in 2006 will lead to the generation of an estimated 10,000 tons of arsenic bearing solid residuals (ABSRs) every year. The regulatory protocols, such as TCLP and California Waste Extraction Test, which are used to determine the legal disposal of ABSRs into a municipal solid waste landfill, have been demonstrated significantly misrepresent arsenic mobilization in landfills. Mechanisms responsible for arsenic leaching from spent adsorbents under landfill conditions are not known with certainty but are of crucial importance as it is likely that these adsorbent media will be used and subsequently discarded as residents and utilities treat As-contaminated source waters to meet regulations. This study is one of the few studies investigating As leaching potential of spent media compromised of Bayoxide E33 from long-term arsenic removal operations subjected to different leaching tests, including ones with landfill leachate. Detailed factors of As release mechanisms in both macroscopic aspect, such as physical leaching conditions and in microscopic aspect, such as complexation configurations between As and iron oxide media, chemical component configurations in the leachate were studied comprehensively. The focus on source water chemistry and treatment process revealed the significance of considering the initial As loading as a factor for As release. Chemical configuration of leachate becomes another significant factor that influence As release. Landfill leachate may vary vastly from site to site, but the one with high pH, high concentrations of TOC that promotes mineral dissolution and competes directly with As on the mineral surface as well as high concentrations of phosphate and bicarbonate will contribute more to As release. X-ray adsorption fine structure (XAFS) spectroscopy studies showed binuclear bidentate complexes of As(V) dominated in both pre-leaching and post-leaching samples and few shifts from strongly bounded complexes to less stable ones were found to be associated with water treatment processes and with high pH and reduced leaching conditions. Advisors/Committee Members: Lenhart, John (Advisor).

Subjects/Keywords: arsenic; leaching; landfill

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APA (6^th Edition):

Yi, M. (2009). Arsenic Leaching From Spent Adsorbents Under Landfill Conditions. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1250178204

Chicago Manual of Style (16^th Edition):

Yi, Mengling. “Arsenic Leaching From Spent Adsorbents Under Landfill Conditions.” 2009. Masters Thesis, The Ohio State University. Accessed July 20, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1250178204.

MLA Handbook (7^th Edition):

Yi, Mengling. “Arsenic Leaching From Spent Adsorbents Under Landfill Conditions.” 2009. Web. 20 Jul 2019.

Vancouver:

Yi M. Arsenic Leaching From Spent Adsorbents Under Landfill Conditions. [Internet] [Masters thesis]. The Ohio State University; 2009. [cited 2019 Jul 20]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1250178204.

Council of Science Editors:

Yi M. Arsenic Leaching From Spent Adsorbents Under Landfill Conditions. [Masters Thesis]. The Ohio State University; 2009. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1250178204

Queens University

17. Sealey, Heather. ARSENIC MOBILITY AND ATTENUATION IN A NATURAL WETLAND AT TERRA MINE, NORTHWEST TERRITORIES, CANADA .

Degree: Geological Sciences & Geological Engineering, 2011, Queens University

URL: http://hdl.handle.net/1974/6577

► Elevated arsenic (As) concentrations in surface water from storing mine tailings in lakes can have a negative impact on local and downstream vegetation and aquatic… (more)

▼ Elevated arsenic (As) concentrations in surface water from storing mine tailings in lakes can have a negative impact on local and downstream vegetation and aquatic life. At Terra Mine, an abandoned silver and copper mine in the Northwest Territories, tailings storage in Ho-Hum Lake has resulted in dissolved As concentrations of 50-80 μg/L, exceeding the 5 μg/L maximum guideline for aquatic life. A natural wetland located downstream appears to be attenuating As from surface water. The objectives of this study was to understand the sources of As to the wetland, the effectiveness of the wetland to sequester As, the form and stability of As in the sediments, the processes controlling As mobility, and the effect of seasonal changes in the wetland in the dissolved phase. Arsenic bound to the sediments was determined by analyzing for bulk composition, and As speciation and element association were identified using synchrotron-based bulk XANES and ESEM analysis. Arsenic enters the wetland by surface flow from Ho-Hum Lake, subsurface flow through the waste rock airstrip, and by windblown dust. In spring, dissolved As concentrations in surface water increased downstream. In late summer, a decrease in concentration was observed in the upstream portion of the wetland, however As returned to lake concentrations further downstream. Sediment As concentrations increased over the summer. ESEM and bulk XANES indicate that As was associated with (oxy)hydroxides and secondary sulphides. In the spring, when water levels were high from snow melt, (oxy)hydroxides formed and captured As, while sulphide oxidation in the sediments lead to the release of As into surface water. Over the summer, the onset of reducing conditions from microbial activity drove the formation of As-bearing sulphides and dissolution of (oxy)hydroxides. While As was accumulating in the sediments at most sites in the wetland over the summer, these results suggest that the wetland was not effectively sequestering dissolved As from the surface water, and that sediment-water cycling of As in the wetland as a result of seasonal redox variations were contributing As in the surface water.

Subjects/Keywords: wetlands; arsenic; geochemistry

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APA (6^th Edition):

Sealey, H. (2011). ARSENIC MOBILITY AND ATTENUATION IN A NATURAL WETLAND AT TERRA MINE, NORTHWEST TERRITORIES, CANADA . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/6577

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):

Sealey, Heather. “ARSENIC MOBILITY AND ATTENUATION IN A NATURAL WETLAND AT TERRA MINE, NORTHWEST TERRITORIES, CANADA .” 2011. Thesis, Queens University. Accessed July 20, 2019. http://hdl.handle.net/1974/6577.

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

MLA Handbook (7^th Edition):

Sealey, Heather. “ARSENIC MOBILITY AND ATTENUATION IN A NATURAL WETLAND AT TERRA MINE, NORTHWEST TERRITORIES, CANADA .” 2011. Web. 20 Jul 2019.

Vancouver:

Sealey H. ARSENIC MOBILITY AND ATTENUATION IN A NATURAL WETLAND AT TERRA MINE, NORTHWEST TERRITORIES, CANADA . [Internet] [Thesis]. Queens University; 2011. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/1974/6577.

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

Council of Science Editors:

Sealey H. ARSENIC MOBILITY AND ATTENUATION IN A NATURAL WETLAND AT TERRA MINE, NORTHWEST TERRITORIES, CANADA . [Thesis]. Queens University; 2011. Available from: http://hdl.handle.net/1974/6577

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

University of Aberdeen

18. Aborode, Fatai Adigun. Selenium and arsenic speciation in plants.

Degree: PhD, 2013, University of Aberdeen

URL: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=201647 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.577621

► Selenium and arsenic are important metalloids in the food chain from nutritional and toxicological point of view. These two metalloids are potentially enriched through geogenic… (more)

▼ Selenium and arsenic are important metalloids in the food chain from nutritional and toxicological point of view. These two metalloids are potentially enriched through geogenic processes and anthropogenic activities and they could sometimes co-exist in nature and become available to plants thereby entering the food chain. While selenium is known as an essential element to humans, it could also be toxic. Arsenic on the other hand is a potentially toxic element posing serious health risks to livestock and humans. They have been found to neutralise each other’s effects in animals but their interactions in plants are not well understood. Speciation analysis, which is a set of activities leading to identification and quantification of different forms or species of elements present in an entity, is required for a holistic understanding of the mechanisms and interactions involved in the plants’ metabolism of contaminants and essential elements. Many techniques are currently being used for speciation of selenium and arsenic in plants and they sometimes give contradictory outcomes. The hyphenation of HPLC with MS and synchrotron techniques are the two most commonly used state of the art techniques for speciation of these metalloids. This research therefore sought to access, explore and/ or develop analytical methods appropriate for the speciation of selenium and arsenic in plants. Many selenium and arsenic species have been identified and reported in the literature using well established procedures. The presence of elemental selenium in plants has also been widely reported in plants but to our knowledge this presence has never been experimentally proven and fully quantified. Because this species is non toxic, its proven occurrence in plants will represent a potential detoxification mechanism. Therefore in this study, a method was specifically developed for identification and quantification of elemental selenium. In order to investigate the occurrence of elemental selenium in plants, the newly developed method was applied using Thunbergia alata as a model plant. Arsenic is known to activate the synthesis of PC using glutathione and the complexation of the activating arsenic ions with the synthesised PCs is a well established detoxification mechanism for arsenic. However, very little is known about the role of glutathione and PCs in selenium detoxification. In order to be able to gain better insight into the interaction between selenium and arsenic in plants, the role of glutathione and PCs in selenium metabolism was investigated using Arabidopsis thaliana as a model plant. Sensitivity tests and speciation analysis were carried out on Arabidopsis thaliana WT and the mutants’ one of which is deficient in GSH synthesis and the other deficient in PC synthesis using selenite and arsenate as toxicants. The study revealed that selenium induces the synthesis of glutathione but rather use it as reductant and precursor for transformation and incorporation into peptides and neither GSH nor PCs play any role in selenium detoxification. It…

Subjects/Keywords: 540; Selenium; Arsenic

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APA (6^th Edition):

Aborode, F. A. (2013). Selenium and arsenic speciation in plants. (Doctoral Dissertation). University of Aberdeen. Retrieved from http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=201647 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.577621

Chicago Manual of Style (16^th Edition):

Aborode, Fatai Adigun. “Selenium and arsenic speciation in plants.” 2013. Doctoral Dissertation, University of Aberdeen. Accessed July 20, 2019. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=201647 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.577621.

MLA Handbook (7^th Edition):

Aborode, Fatai Adigun. “Selenium and arsenic speciation in plants.” 2013. Web. 20 Jul 2019.

Vancouver:

Aborode FA. Selenium and arsenic speciation in plants. [Internet] [Doctoral dissertation]. University of Aberdeen; 2013. [cited 2019 Jul 20]. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=201647 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.577621.

Council of Science Editors:

Aborode FA. Selenium and arsenic speciation in plants. [Doctoral Dissertation]. University of Aberdeen; 2013. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=201647 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.577621

University of Aberdeen

19. Lomax, Charlotte. Investigating the origin and transport of methylated arsenic species in plants.

Degree: PhD, 2013, University of Aberdeen

URL: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=203948 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.600090

► Inorganic arsenic is a toxic element known to cause various diseases and cancers in humans. Arsenic contamination is widespread worldwide, particularly in South-East Asia where… (more)

Subjects/Keywords: 570; Arsenic; Plants

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APA (6^th Edition):

Lomax, C. (2013). Investigating the origin and transport of methylated arsenic species in plants. (Doctoral Dissertation). University of Aberdeen. Retrieved from http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=203948 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.600090

Chicago Manual of Style (16^th Edition):

Lomax, Charlotte. “Investigating the origin and transport of methylated arsenic species in plants.” 2013. Doctoral Dissertation, University of Aberdeen. Accessed July 20, 2019. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=203948 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.600090.

MLA Handbook (7^th Edition):

Lomax, Charlotte. “Investigating the origin and transport of methylated arsenic species in plants.” 2013. Web. 20 Jul 2019.

Vancouver:

Lomax C. Investigating the origin and transport of methylated arsenic species in plants. [Internet] [Doctoral dissertation]. University of Aberdeen; 2013. [cited 2019 Jul 20]. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=203948 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.600090.

Council of Science Editors:

Lomax C. Investigating the origin and transport of methylated arsenic species in plants. [Doctoral Dissertation]. University of Aberdeen; 2013. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=203948 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.600090

University of Aberdeen

20. Uroic, Miran Kalle. The impact of arsenic species on the production and composition of xylem sap.

Degree: PhD, 2011, University of Aberdeen

URL: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=167822 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553813

► The focus of this research was on the xylem sap of cucumber plants during arsenic stress. A better understanding of the uptake and translocation mechanisms… (more)

Subjects/Keywords: 546.715; Arsenic; Xylem

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APA (6^th Edition):

Uroic, M. K. (2011). The impact of arsenic species on the production and composition of xylem sap. (Doctoral Dissertation). University of Aberdeen. Retrieved from http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=167822 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553813

Chicago Manual of Style (16^th Edition):

Uroic, Miran Kalle. “The impact of arsenic species on the production and composition of xylem sap.” 2011. Doctoral Dissertation, University of Aberdeen. Accessed July 20, 2019. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=167822 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553813.

MLA Handbook (7^th Edition):

Uroic, Miran Kalle. “The impact of arsenic species on the production and composition of xylem sap.” 2011. Web. 20 Jul 2019.

Vancouver:

Uroic MK. The impact of arsenic species on the production and composition of xylem sap. [Internet] [Doctoral dissertation]. University of Aberdeen; 2011. [cited 2019 Jul 20]. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=167822 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553813.

Council of Science Editors:

Uroic MK. The impact of arsenic species on the production and composition of xylem sap. [Doctoral Dissertation]. University of Aberdeen; 2011. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=167822 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553813

University of Saskatchewan

21. Bhalkaran, Savi 1988-. Removal of Arsenic Species through Coagulation-Flocculation Processes.

Degree: 2017, University of Saskatchewan

URL: http://hdl.handle.net/10388/7832

► Through the traditional water treatment process of coagulation-flocculation, this thesis aims to investigate the effectiveness of the removal of organic and inorganic forms of arsenic… (more)

▼ Through the traditional water treatment process of coagulation-flocculation, this thesis aims to investigate the effectiveness of the removal of organic and inorganic forms of arsenic using a two-component coagulant-biopolymer flocculant system. Among the metal salts chosen in this study, the optimal dosage required was 30 ppm for alum, and 15 ppm for Fe(II) chloride and Fe(III) chloride metal salts. The dosage of the biopolymers was 2.5 ppm for medium molecular weight chitosan (MMWC) and 10 ppm for high viscosity sodium alginate (HVA). In addition to the optimal dosage parameters, pH effects were evaluated at several values (pH 3, 5, 7 and 9) due to the importance of charge neutralization in coagulation-flocculation processes. The results showed no significant decrease in turbidity removal at variable pH using a Jar test apparatus. The stirring time and speed was optimized at several conditions: 3 minutes (295 rpm) and 20 minutes (25 rpm) and finally, the addition of the polymers was added in a sequential manner rather than as a single step using a premixed polymer system. This last step was chosen because premixed polymers were less effective. The next stage of research involved the use of an optimized system to study the removal of roxarsone (4-hydroxy-3-nitrobenzene arsonic acid). The use of a coagulant-biopolymer system (Fe(III)-MMWC/HVA) was shown to be effective for the removal of roxarsone at initial concentrations of 30, 40, 50 ppm. Jar test studies reveal that the concentration of free roxarsone decreased when Fe(III) alone was used as a coagulant, in the presence and absence of kaolinite. Addition of biopolymers generally lead to a decrease in roxarsone uptake. Arsenate (V) was studied using a Jar test setup at an initial concentration of 30 ppm. The removal (%) of arsenate (V) was shown to be slightly higher than roxarsone at 42%, as compared to 23% using the metal salt-biopolymer system without kaolinite. Addition of kaolinite to the arsenate (V) caused a 10% increase in removal (%) when using Fe(III) and Fe(III)-HVA system, where no discernible change was found for the Fe(III)-MMWC/HVA system. The one-pot method was used to study the kinetics during floc formation and settling. The removal efficacy (%) was plotted against time and revealed that Fe(III) species were primarily responsible for roxarsone removal, while alginate hinders the roxarsone uptake. Kinetic studies were carried out using the one-pot method and evaluated by two kinetic models, the pseudo-first order (PFO) and pseudo-second order (PSO) models by plotting “arsenic uptake” (Qt) in mg/g against time (t). The PFO model was more favorable, indicating reversible binding interactions throughout the coagulation-flocculation process of roxarsone and arsenate (V) with Fe(III), MMWC and HVA. Thermodynamic studies were carried out at variable temperatures (20 ºC, 30 ºC and 40 ºC) using only Fe(III) and the Fe(III)–MMWC/HVA systems, in the presence and absence of a model colloid (kaolinite). All “apparent” Ea values were negative for the removal… Advisors/Committee Members: Wilson, Lee D, George, Graham, McBeth, Joyce M, Grosvenor, Andrew.

Subjects/Keywords: arsenic; coagulation-flocculation

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APA (6^th Edition):

Bhalkaran, S. 1. (2017). Removal of Arsenic Species through Coagulation-Flocculation Processes. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/7832

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):

Bhalkaran, Savi 1988-. “Removal of Arsenic Species through Coagulation-Flocculation Processes.” 2017. Thesis, University of Saskatchewan. Accessed July 20, 2019. http://hdl.handle.net/10388/7832.

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

MLA Handbook (7^th Edition):

Bhalkaran, Savi 1988-. “Removal of Arsenic Species through Coagulation-Flocculation Processes.” 2017. Web. 20 Jul 2019.

Vancouver:

Bhalkaran S1. Removal of Arsenic Species through Coagulation-Flocculation Processes. [Internet] [Thesis]. University of Saskatchewan; 2017. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/10388/7832.

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

Council of Science Editors:

Bhalkaran S1. Removal of Arsenic Species through Coagulation-Flocculation Processes. [Thesis]. University of Saskatchewan; 2017. Available from: http://hdl.handle.net/10388/7832

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

Cornell University

22. Lim, Maya. Arsenic Uptake By Sweet Alyssum (Lobularia Maritima): Effects On Plant Metabolism And Larvae Of The Small White Butterfly (Pieris Rapae) .

Degree: 2015, Cornell University

URL: http://hdl.handle.net/1813/41138

► Arsenic, once commonly used as a pesticide, is highly toxic to consumers but also can influence plant metabolism and growth. Therefore, soil arsenic can affect… (more)

Subjects/Keywords: arsenic; plant; insect

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APA (6^th Edition):

Lim, M. (2015). Arsenic Uptake By Sweet Alyssum (Lobularia Maritima): Effects On Plant Metabolism And Larvae Of The Small White Butterfly (Pieris Rapae) . (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/41138

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):

Lim, Maya. “Arsenic Uptake By Sweet Alyssum (Lobularia Maritima): Effects On Plant Metabolism And Larvae Of The Small White Butterfly (Pieris Rapae) .” 2015. Thesis, Cornell University. Accessed July 20, 2019. http://hdl.handle.net/1813/41138.

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

MLA Handbook (7^th Edition):

Lim, Maya. “Arsenic Uptake By Sweet Alyssum (Lobularia Maritima): Effects On Plant Metabolism And Larvae Of The Small White Butterfly (Pieris Rapae) .” 2015. Web. 20 Jul 2019.

Vancouver:

Lim M. Arsenic Uptake By Sweet Alyssum (Lobularia Maritima): Effects On Plant Metabolism And Larvae Of The Small White Butterfly (Pieris Rapae) . [Internet] [Thesis]. Cornell University; 2015. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/1813/41138.

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

Council of Science Editors:

Lim M. Arsenic Uptake By Sweet Alyssum (Lobularia Maritima): Effects On Plant Metabolism And Larvae Of The Small White Butterfly (Pieris Rapae) . [Thesis]. Cornell University; 2015. Available from: http://hdl.handle.net/1813/41138

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

Texas A&M University

23. Wang, Xiaoxuan. Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System.

Degree: MS, Civil Engineering, 2018, Texas A&M University

URL: http://hdl.handle.net/1969.1/173716

► Arsenic (As) is a toxic element widely encountered in the environment and a food safety concern. The use of engineered nanoparticles (ENPs) has grown rapidly… (more)

▼ Arsenic (As) is a toxic element widely encountered in the environment and a food safety concern. The use of engineered nanoparticles (ENPs) has grown rapidly due to the unique properties that make them beneficial in a wide range of technologies. Studies abound concerning the phytotoxicity of ENPs and their accumulation in plant tissues. However, investigations on ENPs interactions with co-existing contaminants in a plant system, especially with redox sensitive heavy metals, are rare. Two ENPs of interest are cerium oxide nanoparticles (CeO₂ NPs) and zinc oxide nanoparticles (ZnO NPs). The goals of this study were to: (1) determine the impact of CeO₂ NPs and ZnO NPs on the As accumulation in rice, and (2) evaluate whether inorganic As species including both As(III) and As (V) may modify the plant uptake and accumulation of the metal elements of co-present CeO₂ NPs and ZnO NPs. This was done by administering either 1 mg/L of As(III) or As(V), or 100 mg/L of CeO₂ NPs or ZnO NPs or Zn²⁺, or different combinations of As and ENPs or ions at the same concentrations to rice plants. Rice (Oryza sativa) was utilized in this study as a model plant duo to its high propensity for As uptake, and its widespread consumption as a staple food around the world. A hydroponic system was used to avoid the compounding effects of soil and the microorganisms in soil. The results indicated that CeO₂NPs did not show significant effect on total As plant accumulation. The presence of ZnO NPs and Zn²⁺ significantly reduced total As in rice seedlings, except for the concentration of total As in rice shoots with the co-presence of ZnO NPs and As(III). The co-presence of As significantly increased Ce in rice shoots in the CeO₂ NPs + As(III) treatment but did not affect the plant uptake of Zn from ZnO NPs or Zn²⁺. The results confirmed the active interactions between ENPs and co-existing inorganic As species and the extent to which their interactions depend on the properties of ENPs as well as the initial oxidation state of As. Advisors/Committee Members: Ma, Xingmao (advisor), Chu, Kung-Hui (committee member), Dou, Fugen (committee member).

Subjects/Keywords: Arsenic; Nanoparticles; Rice

Record Details Similar Records Cite « Share

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

APA (6^th Edition):

Wang, X. (2018). Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173716

Chicago Manual of Style (16^th Edition):

Wang, Xiaoxuan. “Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System.” 2018. Masters Thesis, Texas A&M University. Accessed July 20, 2019. http://hdl.handle.net/1969.1/173716.

MLA Handbook (7^th Edition):

Wang, Xiaoxuan. “Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System.” 2018. Web. 20 Jul 2019.

Vancouver:

Wang X. Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/1969.1/173716.

Council of Science Editors:

Wang X. Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173716

Texas A&M University

24. Wang, Xiaoxuan. Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System.

Degree: MS, Civil Engineering, 2018, Texas A&M University

URL: http://hdl.handle.net/1969.1/173811

► Arsenic (As) is a toxic element widely encountered in the environment and a food safety concern. The use of engineered nanoparticles (ENPs) has grown rapidly… (more)

▼ Arsenic (As) is a toxic element widely encountered in the environment and a food safety concern. The use of engineered nanoparticles (ENPs) has grown rapidly due to the unique properties that make them beneficial in a wide range of technologies. Studies abound concerning the phytotoxicity of ENPs and their accumulation in plant tissues. However, investigations on ENPs interactions with co-existing contaminants in a plant system, especially with redox sensitive heavy metals, are rare. Two ENPs of interest are cerium oxide nanoparticles (CeO₂ NPs) and zinc oxide nanoparticles (ZnO NPs). The goals of this study were to: (1) determine the impact of CeO₂ NPs and ZnO NPs on the As accumulation in rice, and (2) evaluate whether inorganic As species including both As(III) and As (V) may modify the plant uptake and accumulation of the metal elements of co-present CeO₂ NPs and ZnO NPs. This was done by administering either 1 mg/L of As(III) or As(V), or 100 mg/L of CeO₂ NPs or ZnO NPs or Zn²⁺, or different combinations of As and ENPs or ions at the same concentrations to rice plants. Rice (Oryza sativa) was utilized in this study as a model plant duo to its high propensity for As uptake, and its widespread consumption as a staple food around the world. A hydroponic system was used to avoid the compounding effects of soil and the microorganisms in soil. The results indicated that CeO₂NPs did not show significant effect on total As plant accumulation. The presence of ZnO NPs and Zn²⁺ significantly reduced total As in rice seedlings, except for the concentration of total As in rice shoots with the co-presence of ZnO NPs and As(III). The co-presence of As significantly increased Ce in rice shoots in the CeO₂ NPs + As(III) treatment but did not affect the plant uptake of Zn from ZnO NPs or Zn²⁺. The results confirmed the active interactions between ENPs and co-existing inorganic As species and the extent to which their interactions depend on the properties of ENPs as well as the initial oxidation state of As. Advisors/Committee Members: Ma, Xingmao (advisor), Chu, Kung-Hui (committee member), Dou, Fugen (committee member).

Subjects/Keywords: Arsenic; Nanoparticles; Rice

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

APA (6^th Edition):

Wang, X. (2018). Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173811

Chicago Manual of Style (16^th Edition):

Wang, Xiaoxuan. “Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System.” 2018. Masters Thesis, Texas A&M University. Accessed July 20, 2019. http://hdl.handle.net/1969.1/173811.

MLA Handbook (7^th Edition):

Wang, Xiaoxuan. “Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System.” 2018. Web. 20 Jul 2019.

Vancouver:

Wang X. Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/1969.1/173811.

Council of Science Editors:

Wang X. Elucidating the Effects of Cerium Oxide Nanoparticles and Zinc Oxide Nanoparticles on Arsenic Uptake by Rice (Oryza sativa) in a Hydroponic System. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173811

Duquesne University

25. Chen, Xue. Genomes of Three Arsenic Metabolizing Bacteria.

Degree: MS, Environmental Science and Management (ESM), 2015, Duquesne University

URL: https://dsc.duq.edu/etd/398

► Although arsenic is toxic to most living cells, many microbes live in environments with high concentrations of arsenic. In addition to being resistant to arsenic,… (more)

Subjects/Keywords: Arsenic; Bacteria; Genome

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APA (6^th Edition):

Chen, X. (2015). Genomes of Three Arsenic Metabolizing Bacteria. (Masters Thesis). Duquesne University. Retrieved from https://dsc.duq.edu/etd/398

Chicago Manual of Style (16^th Edition):

Chen, Xue. “Genomes of Three Arsenic Metabolizing Bacteria.” 2015. Masters Thesis, Duquesne University. Accessed July 20, 2019. https://dsc.duq.edu/etd/398.

MLA Handbook (7^th Edition):

Chen, Xue. “Genomes of Three Arsenic Metabolizing Bacteria.” 2015. Web. 20 Jul 2019.

Vancouver:

Chen X. Genomes of Three Arsenic Metabolizing Bacteria. [Internet] [Masters thesis]. Duquesne University; 2015. [cited 2019 Jul 20]. Available from: https://dsc.duq.edu/etd/398.

Council of Science Editors:

Chen X. Genomes of Three Arsenic Metabolizing Bacteria. [Masters Thesis]. Duquesne University; 2015. Available from: https://dsc.duq.edu/etd/398

University of Kansas

26. Chen, Jiani. Mechanistic Studies on Arsenic Toxicity in Endothelial Cells.

Degree: MS, Pharmacology & Toxicology, 2018, University of Kansas

URL: http://hdl.handle.net/1808/27829

► Arsenic is a well-established human toxin. Over 200 million people worldwide are exposed to arsenic, mainly through drinking water. Recently, several epidemiological studies have reported… (more)

Subjects/Keywords: Pharmacology; Arsenic; endothelial

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APA (6^th Edition):

Chen, J. (2018). Mechanistic Studies on Arsenic Toxicity in Endothelial Cells. (Masters Thesis). University of Kansas. Retrieved from http://hdl.handle.net/1808/27829

Chicago Manual of Style (16^th Edition):

Chen, Jiani. “Mechanistic Studies on Arsenic Toxicity in Endothelial Cells.” 2018. Masters Thesis, University of Kansas. Accessed July 20, 2019. http://hdl.handle.net/1808/27829.

MLA Handbook (7^th Edition):

Chen, Jiani. “Mechanistic Studies on Arsenic Toxicity in Endothelial Cells.” 2018. Web. 20 Jul 2019.

Vancouver:

Chen J. Mechanistic Studies on Arsenic Toxicity in Endothelial Cells. [Internet] [Masters thesis]. University of Kansas; 2018. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/1808/27829.

Council of Science Editors:

Chen J. Mechanistic Studies on Arsenic Toxicity in Endothelial Cells. [Masters Thesis]. University of Kansas; 2018. Available from: http://hdl.handle.net/1808/27829

Delft University of Technology

27. Caltran, I. Arsenic oxidation and removal with Manganese oxides in filters :.

Degree: 2016, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:ca0c8c7a-972d-44b6-a431-749c9e16506e

► The actual European Union (EU) guidelines for allowed concentration of arsenic (As) in drinking water fix a maximum of 10 μg/L. However, this limit is… (more)

▼ The actual European Union (EU) guidelines for allowed concentration of arsenic (As) in drinking water fix a maximum of 10 μg/L. However, this limit is expected to become more stringent: the recommended health related limitation from the US Natural Resources Defense Council is below 1 μg/L. In Dutch groundwater treatment plants, the produced drinking water is already far below the EU guidelines due to As removal during sand filtration. On the sand grains, Manganese dioxide (MnO2) is present. MnO2 is able to oxidize As(III) to As(V). This is advantageous because As(III), usually the prevalent specie in groundwater, is uncharged and more difficult to remove. On the other hand, negatively charged As(V) molecules can be easier removed by positively charged iron (Fe) (hydro)oxides in filters. The oxidation of As(III) to As(V) during filtration of groundwater in presence of MnO2 needs to be understood in order to improve this process by adjusting the operational parameters of treatment plants. My research focused on the processes of As(III) oxidation to As(V) by MnO2 at neutral or slightly alkaline pH. I also took into consideration the role of (oxidizing) Fe as inhibitor in As(III) oxidation and as remover of As. I performed laboratory three groups of experiments at the TU Delft Waterlab and at the treatment plant of Vitens in Loosdrecht: • Jar tests using demineralized water with low concentration of As(III) and powders containing MnO2 • Jar tests using demineralized water with low concentration of As(III), powder containing MnO2 and oxidizing Fe(II). • Column tests using groundwater after aeration with As and Fe, and fresh grains containing MnO2 In the three experiment groups it is resulted that: • With lower concentration of purer MnO2 materials, oxidation of As(III) to As(V) was the main process involving As. • As removal in presence of MnO2 material was enhanced by addition of Fe(II) to the system. However, the addition of Fe(II) inhibited As(III) oxidation by MnO2. This inhibition is avoided in experiments with delayed addition of Fe(II), when the As(III) oxidation step is completed. • The MnO2 in the column was active in the oxidation processes of As and Fe. When the free surface MnO2 grains is still largely available, the resulting As concentration was lower than 5 μg/L. Afterwards, when more grain surface is occupied by Fe and other compounds, As removal decreased. In conclusion, Fe inhibits As(III) oxidation by MnO2, but it is also responsible for As removal. The inhibition processes suggested by the results are competitive oxidation and surface disturbance. The relative importance of these two processes should be studied further. Regarding the operational parameters, tests with a broader pH range can be performed. Moreover, the influence of filter bacteria has to be considered as well. Advisors/Committee Members: Rietveld, L.C., Van Halem, D., Gude, J.C.J..

Subjects/Keywords: arsenic; arsenic oxidation; arsenic removal; manganese oxides; iron; rapid filtration

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

APA (6^th Edition):

Caltran, I. (2016). Arsenic oxidation and removal with Manganese oxides in filters :. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:ca0c8c7a-972d-44b6-a431-749c9e16506e

Chicago Manual of Style (16^th Edition):

Caltran, I. “Arsenic oxidation and removal with Manganese oxides in filters :.” 2016. Masters Thesis, Delft University of Technology. Accessed July 20, 2019. http://resolver.tudelft.nl/uuid:ca0c8c7a-972d-44b6-a431-749c9e16506e.

MLA Handbook (7^th Edition):

Caltran, I. “Arsenic oxidation and removal with Manganese oxides in filters :.” 2016. Web. 20 Jul 2019.

Vancouver:

Caltran I. Arsenic oxidation and removal with Manganese oxides in filters :. [Internet] [Masters thesis]. Delft University of Technology; 2016. [cited 2019 Jul 20]. Available from: http://resolver.tudelft.nl/uuid:ca0c8c7a-972d-44b6-a431-749c9e16506e.

Council of Science Editors:

Caltran I. Arsenic oxidation and removal with Manganese oxides in filters :. [Masters Thesis]. Delft University of Technology; 2016. Available from: http://resolver.tudelft.nl/uuid:ca0c8c7a-972d-44b6-a431-749c9e16506e

Columbia University

28. Howe, Caitlin Grace. Nutritional influences on arsenic toxicity in Bangladeshi men and women: interplay between one-carbon metabolism, arsenic, and epigenetics.

Degree: 2016, Columbia University

URL: https://doi.org/10.7916/D8MP53CK

► Background: In Bangladesh, more than 57 million individuals are exposed to arsenic-contaminated drinking water at concentrations that exceed the World Health Organization guideline for safe… (more)

▼ Background: In Bangladesh, more than 57 million individuals are exposed to arsenic-contaminated drinking water at concentrations that exceed the World Health Organization guideline for safe drinking water, which is 10 μg/L. Arsenic is a human carcinogen, which has also been associated with numerous non cancer outcomes, including cardiovascular disease. For many arsenic-related health outcomes, susceptibility differs by sex, with some outcomes preferentially afflicting males and others females. Although reducing exposure to arsenic-contaminated drinking water is the primary strategy for preventing arsenic toxicity, cancer risks remain elevated decades after arsenic exposure has been reduced. Therefore, public health approaches which complement arsenic remediation efforts are needed. One potential set of strategies includes nutritional interventions. Deficiencies in one-carbon metabolism (OCM nutrients can cause hyperhomocysteinemia (HHcys), which has been associated with adverse health outcomes, including cancers and cardiovascular disease. In Bangladesh, the prevalence of HHcys is quite high and differs by sex (63% among men, 26% among women). Nutrients involved in the OCM pathway may also protect against arsenic toxicity. Two potential mechanisms include: 1) by enhancing arsenic metabolism and 2) by preventing/reversing arsenic-induced epigenetic dysregulation. Arsenic metabolism facilitates urinary arsenic elimination and depends on two sequential S-adenosylmethionine (SAM)-dependent methylation steps, which yield the mono- and dimethyl arsenical species (MMA and DMA, respectively and S-adenosylhomocysteine (SAH), a potent inhibitor of most methyltransferases. SAM is synthesized via OCM, a pathway with many nutritional influences, including folate and cobalamin. There is substantial evidence from experimental studies that the OCM pathway is important for facilitating arsenic metabolism and elimination. However, the relationships between SAM, SAH, and arsenic methylation may be particularly complex in populations exposed continuously to arsenic, because 1) the arsenic metabolites compete for methylation, since each methylation step is catalyzed by the arsenic (+3) methyltransferase and requires a methyl group from SAM, and 2) folate and cobalamin nutritional status may vary between individuals. Although the mechanisms mediating arsenic toxicity remain largely unclear and are likely multifactorial, there is increasing evidence that arsenic induces epigenetic dysregulation, including alterations in both DNA methylation and posttranslational histone modifications (PTHMs), and these effects may differ by sex. Arsenic has also been shown to alter gene expression in a sex dependent manner. However, the sex-specific effects of arsenic on PTHMs and gene expression have not been confirmed in a large epidemiological study. Since many of the enzymes involved in epigenetic regulation, including DNA methyltransferases and lysine histone methyltransferases, depend on SAM, epigenetic modifications are also influenced by OCM.…

Subjects/Keywords: Arsenic – Carcinogenicity; Arsenic – Physiological effect; Nutrition – Therapeutic use; Arsenic – Metabolism; Environmental health; Epidemiology; Toxicology

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

APA (6^th Edition):

Howe, C. G. (2016). Nutritional influences on arsenic toxicity in Bangladeshi men and women: interplay between one-carbon metabolism, arsenic, and epigenetics. (Doctoral Dissertation). Columbia University. Retrieved from https://doi.org/10.7916/D8MP53CK

Chicago Manual of Style (16^th Edition):

Howe, Caitlin Grace. “Nutritional influences on arsenic toxicity in Bangladeshi men and women: interplay between one-carbon metabolism, arsenic, and epigenetics.” 2016. Doctoral Dissertation, Columbia University. Accessed July 20, 2019. https://doi.org/10.7916/D8MP53CK.

MLA Handbook (7^th Edition):

Howe, Caitlin Grace. “Nutritional influences on arsenic toxicity in Bangladeshi men and women: interplay between one-carbon metabolism, arsenic, and epigenetics.” 2016. Web. 20 Jul 2019.

Vancouver:

Howe CG. Nutritional influences on arsenic toxicity in Bangladeshi men and women: interplay between one-carbon metabolism, arsenic, and epigenetics. [Internet] [Doctoral dissertation]. Columbia University; 2016. [cited 2019 Jul 20]. Available from: https://doi.org/10.7916/D8MP53CK.

Council of Science Editors:

Howe CG. Nutritional influences on arsenic toxicity in Bangladeshi men and women: interplay between one-carbon metabolism, arsenic, and epigenetics. [Doctoral Dissertation]. Columbia University; 2016. Available from: https://doi.org/10.7916/D8MP53CK

University of Dundee

29. Perry, Meghan Rose. Arsenic, antimony and visceral leishmaniasis.

Degree: PhD, 2014, University of Dundee

URL: http://hdl.handle.net/10588/14edf50b-4943-4ec8-8556-8aaecf3a9f49

► In Bihar state, India, the cure rate of antimonial compounds in the treatment of visceral leishmaniasis (VL) has declined from over 85% to less than… (more)

Subjects/Keywords: 616.9; Antimony; Arsenic; Leishmania; Resistance

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

APA (6^th Edition):

Perry, M. R. (2014). Arsenic, antimony and visceral leishmaniasis. (Doctoral Dissertation). University of Dundee. Retrieved from http://hdl.handle.net/10588/14edf50b-4943-4ec8-8556-8aaecf3a9f49

Chicago Manual of Style (16^th Edition):

Perry, Meghan Rose. “Arsenic, antimony and visceral leishmaniasis.” 2014. Doctoral Dissertation, University of Dundee. Accessed July 20, 2019. http://hdl.handle.net/10588/14edf50b-4943-4ec8-8556-8aaecf3a9f49.

MLA Handbook (7^th Edition):

Perry, Meghan Rose. “Arsenic, antimony and visceral leishmaniasis.” 2014. Web. 20 Jul 2019.

Vancouver:

Perry MR. Arsenic, antimony and visceral leishmaniasis. [Internet] [Doctoral dissertation]. University of Dundee; 2014. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/10588/14edf50b-4943-4ec8-8556-8aaecf3a9f49.

Council of Science Editors:

Perry MR. Arsenic, antimony and visceral leishmaniasis. [Doctoral Dissertation]. University of Dundee; 2014. Available from: http://hdl.handle.net/10588/14edf50b-4943-4ec8-8556-8aaecf3a9f49

Technical University of Lisbon

30. Carvalho, João da Cruz. Dinâmica do arsénio no sistema solo-água-arroz.

Degree: 2013, Technical University of Lisbon

URL: https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6704

►

Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia

Paddy rice (Oryza sativa L.) is a staple food consumed worldwide especially in Asia and one… (more)

Subjects/Keywords: paddy rice; arsenic; biogeochemistry; cytogenetics

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

APA (6^th Edition):

Carvalho, J. d. C. (2013). Dinâmica do arsénio no sistema solo-água-arroz. (Thesis). Technical University of Lisbon. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6704

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):

Carvalho, João da Cruz. “Dinâmica do arsénio no sistema solo-água-arroz.” 2013. Thesis, Technical University of Lisbon. Accessed July 20, 2019. https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6704.

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

MLA Handbook (7^th Edition):

Carvalho, João da Cruz. “Dinâmica do arsénio no sistema solo-água-arroz.” 2013. Web. 20 Jul 2019.

Vancouver:

Carvalho JdC. Dinâmica do arsénio no sistema solo-água-arroz. [Internet] [Thesis]. Technical University of Lisbon; 2013. [cited 2019 Jul 20]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6704.

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

Council of Science Editors:

Carvalho JdC. Dinâmica do arsénio no sistema solo-água-arroz. [Thesis]. Technical University of Lisbon; 2013. Available from: https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6704

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

Open Access Theses and Dissertations