Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 57 for “"arsenite"”.
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Role of Sodium Arsenite in Atherogenesis
… and concentration-dependent effects of sodium arsenite [As(III)] on the development of atherosclerosis in ApoE-/- /LDLr-/- mice, (2) determining whether As(III)-induced peroxynitrite activates protein kinase C (PKC) isotypes, α and β, in human aortic endothelial cells (HAECs) and (3) …
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Role of Sodium Arsenite in Atherogenesis
… and concentration-dependent effects of sodium arsenite [As(III)] on the development of atherosclerosis in ApoE-/- /LDLr-/- mice, (2) determining whether As(III)-induced peroxynitrite activates protein kinase C (PKC) isotypes, α and β, in human aortic endothelial cells (HAECs) and (3) …
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Isolation and characterization of an arsenite-oxidizing culture
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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Competitive Adsorption of Arsenite and Silicic Acid on Goethite
The adsorption behavior of silicic acid and arsenite alone and competitively on goethite over a broad pH range (3-11) at environmentally relevant concentrations was investigated utilizing pH adsorption data and zeta potential measurements. Both addition scenarios (Si before As(III) and As(III) …
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A 450K arsenite-binding protein of the rabbit liver cytosol
… incubation system to [⁷³As]-label proteins. Arsenite was the species which bound cytosolic proteins and this was attributed to its affinity for protein sulfhydryls. Ammonium sulfate precipitation of cytosolic proteins revealed three arsenite-binding proteins (AsBPs) with molecular weights of …
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Microbial Oxidation of Arsenite in Anoxic Environments: Impacts on Arsenic Mobility
… Microbial reduction of arsenate (As(V)) to arsenite (As(III)) and ferric (hydr)oxides to Fe(II) is hypothesized to be the dominant mechanisms of As mobilization in subsurface environments. If oxidizing conditions can be restored, As can be immobilized by the formation of As(V) and ferric …
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Disruption of 8-hydroxy-2'-deoxyguanosine DNA Glycosylase (OGG1) Antioxidant Response Capacity by Sodium Arsenite
… in superoxide dismutase activities subsequent to arsenite exposure in actively dividing and NGF treated PC12 cells. Assessment of Ogg1 activity and mRNA levels demonstrated a significant decrease for both measures subsequent to arsenite exposure. The effect seen was due in large part to …
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Disruption of 8-hydroxy-2'-deoxyguanosine DNA Glycosylase (OGG1) Antioxidant Response Capacity by Sodium Arsenite
… in superoxide dismutase activities subsequent to arsenite exposure in actively dividing and NGF treated PC12 cells. Assessment of Ogg1 activity and mRNA levels demonstrated a significant decrease for both measures subsequent to arsenite exposure. The effect seen was due in large part to …
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Aquaria studies on the uptake of arsenic 74 labeled sodium arsenite by components of an aquatic ecosystem
Thesis (M.S.)--Michigan State University. Dept. of Fisheries and Wildlife, 1966
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Interactive effects of selenium on arsenic and cadmium induced toxicity in rainbow trout (Oncorhynchus mykiss)
… literature suggests that selenium can modify arsenite or cadmium toxicity in fish; however, our current understanding of the biochemical pathways involved in such interactions is obtained predominantly from mammalian experimental systems, and the literature on aquatic organisms is sparse. To …
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Design of High Efficiency Fibers for Ion Exchange and Heavy Metal Removal
… of a thiol group to bind to the highly toxic arsenite ion (as is done in proteins and enzymes) provided the model used to chemically modify and characterize a polyvinyl alcohol mercaptyl fibrous system, coated on a fiberglass substrate, for the purpose of arsenite (As3+) removal from water. …
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ΜΕΛΕΤΗ ΤΗΣ ΕΠΙΔΡΑΣΗΣ ΤΟΥ ΘΕΡΜΙΚΟΥ ΣΟΚ ΣΕ ΜΟΛΥΣΜΕΝΑ ΚΑΙ ΜΕΤΑΣΧΗΜΑΤΙΣΜΕΝΑ ΑΠΟ ΤΟΝΙΟ SV40
… FAMILY ARE INDUCED AFTER HEAT SHOCK (43 C) AND ARSENITE TREATMENT (20-25 MM) BUT THEY WERE ALSO INDUCED AFTER INFECTION OF THE CV1 CELLS WITH SV40 VIRUS. IT WAS ALSO SHOWN THAT THE ABOVE INDUCTION WAS SOMEWHAT DIFFERENT. THE GENES RESPONSIBLE FOR THE INDUCTION OF THE 70 KD FAMILY HEAT SHOCK …
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Effects of sulfur complexation on intestinal transport and toxicity of metalloids in cell cultures
… arsenic species. The influence of sulfide on arsenite was investigated concerning the formation of inorganic thioarsenates and an accordingly modified cytotoxicity, quantified by means of MTT assay. The cytotoxic effects of arsenite, arsenate, and inorganic thioarsenates were compared for …
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Effect of adsorption of non-protolyzable anions on goethite (alpha-FeOOH) mobility
… SOME NON-PROTOLYZABLE ANIONS LIKE FLUORIDE AND ARSENITE, THE ADSORPTION HAS ALMOST NO EFFECT ON SURFACE CHARGE. THIS BEHAVIOR IS INCONSISTENT WITH THE COMMONLY USED MODELS FOR ANION ADSORPTION. </P><P>THE FOCUS OF THIS STUDY IS TO GAIN FURTHER UNDERSTANDING INTO WHY THIS OCCURS. ADSORPTION …
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Microbial Diversity and Geochemical Energy Sources of Tutum Bay, Ambitle Island, Papua New Guinea, an Arsenic-Rich, Shallow-Sea Hydrothermal System
… Hydrothermal vents in the bay expel fluids with arsenite: AsIII) concentrations as high as 950 μg/L. To determine the role that Tutum Bay microorganisms might play in mediating As-redox reactions, three approaches were used: analyzing the geochemical environment for energy sources, …
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Measurement of inorganic arsenic and chromium species in southern Nevada groundwater using ion chromatography-inductively coupled plasma mass spectrometry
… spectrometer were used to separate inorganic arsenite from arsenate and trivalent from hexavalent chromium in southern Nevada groundwater. Method detection limits were found to be 0.011 ppb and 0.005 ppb for arsenite and arsenate respectively, and 0.015 ppb and 0.02 ppb for trivalent and …
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Exploring combined effects of arsenic and selenium exposure on larval zebrafish (Danio rerio)
… is a major environmental concern, with arsenite (As³⁺) being highly toxic. Selenium (Se) helps mitigate oxidative stress and hence could reduce the toxic effects of arsenic. However, Se can also be toxic at high concentrations. Given that these metalloids commonly co-occur in the …
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Investigations towards a better understanding of arsenic-sulfur speciation in aquatic environments: Formation, stability, structural characterization, and conflicting analyses
… and especially the nature of these species, thioarsenites vs. thioarsenates, has been under intense debate. The major objective of the present PhD work was to improve the current knowledge about As-S species by structural characterization, investigations of their occurrence, formation and …
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Ruolo della TDP-43 nella formazione dei granuli da stress nella Sclerosi Laterale Amiotrofica
… healthy controls. After treatment with sodium arsenite (0,5 mM), for 30 and 60 minutes, we observed a significantly higher number of cells exhibiting stress granules, identified by immunostaining for specific markers (TIA-1 and HuR), in fibroblasts from healthy controls compare with those from …
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