Topic
Potassium dichromate
About: Potassium dichromate is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 18967 citations. The topic is also known as: Potassium dichromate(VI) & Chromium potassium oxide.
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TL;DR: In this article, the results indicated that the presence of dichromate has a large influence on the extraction of metals, such as Cu, Co, Zn, and Fe.
64 citations
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TL;DR: The results demonstrate that Cr(III) is absorbed through the respiratory tract, but its kinetics and distribution in the body are not the same as for Cr(VI), and are not adequately monitored by short-term urinary determinations.
63 citations
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TL;DR: The results suggest that the interaction of chromium with thiol-containing amino acids and peptides may be important in chromium genotoxicity, and indicate that theThiol-activated chromium may target guanine bases in DNA.
Abstract: The formation of chromium-DNA adducts, and chromium-mediated peptide-DNA or amino acid-DNA cross-links was measured after treatment of calf thymus DNA and defined DNA polynucleotides in vitro with potassium dichromate in the presence of glutathione or cysteine. The level of chromium bound to DNA after reaction with chromium(VI) in the presence of glutathione increased with increasing glutathione concentration to a level of approximately 1.4 x 10(-2) chromium per nucleotide. Glutathione and chromium were associated with the DNA in a 1:1 ratio. Reaction of chromium(VI) with DNA in the presence of cysteine led to a maximal level of chromium binding that was 10-fold lower than that measured with glutathione, with 2-4 cysteine bound per chromium. The thiol-chromium-DNA complexes were stable to dialysis at room temperature against diethylenetriaminepentaacetic acid, orthophenanthroline and ethylenediaminetetraacetic acid. However, when the chromium-DNA complexes were dialyzed against ethylenediaminetetraacetic acid at 37 degrees C to chelate bound chromium, equivalent amounts of chromium and thiol were lost from the DNA, suggesting that thiol was associated with the DNA-bound chromium. These results suggest that chromium mediates cross-linking of cysteine and glutathione to DNA, to form glutathione-chromium-DNA and (cysteine)2-4-chromium-DNA complexes. In order to probe the DNA base and sequence specificity of glutathione-chromium-DNA adduct formation, chromium and glutathione binding to polynucleotides of defined composition was determined. Preferential binding of chromium to guanine-containing polynucleotides was observed. These results suggest that the interaction of chromium with thiol-containing amino acids and peptides may be important in chromium genotoxicity, and indicate that the thiol-activated chromium may target guanine bases in DNA.
63 citations
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TL;DR: Data suggest that potentized (diluted and vigorously shaken) potassium dichromate may help to decrease the amount of stringy tracheal secretions in COPD patients.
62 citations