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Showing 1 to 9 of 9 for “"sodium dithionite"”.
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Studies of arsenic, copper and lead in the soils of the Tamar Valley
… pollution are indicated by the combination of sodium dithionite and nitric acid extraction techniques, from which elemental association with secondary iron and sulphide minerals may be determined. Enhanced levels resulting from aerial pollution were found in a zone a few hundred metres around …
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Glutamine Phosphoribosyl Pyrophosphate Amidotransferase From Bacillus Subtilis: Iron-Sulfur Biochemistry and Enzymology
… detected. The cluster was reduced poorly with sodium dithionite, but was reduced readily by photoreduction with 5-deazaflavin. Photoreduction of the native enzyme resulted in formation of the +1 redox state of the cluster. The reduced enzyme was EPR silent. Examination of the reduced enzyme by …
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Infrared Study of Oxidized and Reduced Nontronite and Ca-K Competition in the Interlayer
… when the clay was chemically reduced with sodium dithionite. When the reduced clay was reoxidized, Ca, again, displayed a preference over K, but the ratio of Ca to K was not restored to the original extent. The selectivity of cations in the interlamaller space of SWa-1 also depended on the …
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Enhanced Dechlorination of 1,2-Dichloroethane by Coupled Nano Iron-Dithionite Treatment
… nZVI (stabilized or non-stabilized) with sodium dithionite were conducted for the degradation of 1,2-DCA. These experiments have yielded up to 92 % degradation of the initial 1,2-DCA concentration over the course of a year. Observed pseudo-first order rate constants (kobs) range from 3.8 x …
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Synthetic Materials with Redox-Triggers for Imaging and Drug Delivery
… was evaluated with a chemical reductant, sodium dithionite demonstrating that the significant amount of paclitaxel was released at a simulated redox-state compared to the control. Cell viability studies revealed that the polymer was non-toxic and the nanoparticles and micelles could …
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Nitric Oxide in the Cytotoxicity of Metronidazole Against Trichomonas Vaginalis
… was incubated for one hour at 37°C with (1) sodium dithionite and (2) the enzymatic mixture consisting of ferredoxin oxidoreductase, ferredoxin, and NADPH, NO was only detected by EPR following the addition of ascorbic acid. On the other hand, the nitro anion radical was consistently produced …
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Abiotic nitrate reduction by redox activated iron-bearing smectites
… investigated using SWa-1 chemically reduced by sodium dithionite. Analysis of ferrous and total iron concentrations in the reduced clay was performed with a colorimetric 1,10-phenanthroline method before and after reaction with a dilute nitrate solution to observe reoxidation of the clay …
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THE EFFECT OF ALTERNATING DISTRIBUTION OF TRANSITION METALS IN LAYERED MATERIALS ON OXYGEN EVOLUTION CATALYSIS
… of birnessite was reduced by stirring with sodium dithionite, in which case the oxidation states of surface Mn decreased faster than those of inside Mn. We characterized the difference between the oxidation states of Mn of surface and inside (ΔAOS) and further investigate the effect of ΔAOS …
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Exploring the reactivity of bacterial multicomponent monooxygenases
… iron. The RRE reaction product can be reduced by sodium dithionite to produce the one-electron reduced Roussin's red ester (rRRE) having absorption bands at 640 and 960 nm. These results show that NO reacts readily with protein-based Rieske centers and suggest that dinuclear RRE species, not …