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 paper, the utility of potassium dichromate in the presence of Lewis acids under solid phase conditions is described, and the reagent efficiently oxidizes alcohols, acyloins, oximes and semicarbazones to their corresponding carbonyl compounds, while trimethylsilyl and tetrahydropyranyl ethers, ethylene acetals and ketals undergo oxidative deprotection.
Abstract: The synthetic utility of potassium dichromate in the presence of Lewis acids under solid phase conditions is described. This reagent efficiently oxidizes alcohols, acyloins, oximes and semicarbazones to their corresponding carbonyl compounds, while trimethylsilyl and tetrahydropyranyl ethers, ethylene acetals and ketals undergo oxidative deprotection to produce carbonyl compounds efficiently.
14 citations
TL;DR: Most of the oxidizing chemicals led to significant changes in endogenous steroid profile parameters which were considered stable under normal conditions and have the potential to act as masking agents that can complicate or prevent the detection of the steroid abuse.
14 citations
TL;DR: A significant decrease was observed in lethality due to exposure to radiation in comparison with action of only potassium dichromate and cadmium chloride or their combination without exposure to gamma rays, which support the theory of hormesis.
Abstract: BeAova K., P. Dvofiak, M. Falis, Z. Sklenafi: Interaction of Low Doses of Ionizing Radiation, Potassium Dichromate and Cadmium Chloride in Artemia franciscana Biotest. Acta Vet. Brno 2007, 76: 35-40. The influence of cadmium chloride (at concentrations of 100 and 200 mg·l -1 ) and potassium dichromate (at a concentration of 50 mg·l -1 ) along with the effect of gamma radiation 60 Co (at a dose of 10 and 50 Gy) on lethality to Artemia franciscana was investigated. Four different interactions were studied, namely, those of potassium dichromate and gamma radiation, cadmium chloride and gamma radiation, and combinations of potassium dichromate and cadmium chloride in interaction with gamma radiation. A significant (α = 0.05) decrease was observed in lethality due to exposure to radiation (10 Gy) in comparison with action of only potassium dichromate and cadmium chloride or their combination without exposure to gamma rays. These results support the theory of hormesis.
14 citations
TL;DR: The presence of serum seemed to have a protective and modifying role regarding the effect of the various metal compounds on the DNA synthesis of lymphoid cells from unsensitized guinea pigs.
Abstract: The metal allergens cobalt chloride, mercuric chloride, nickel sulfate and potassium dichromate were tested regarding their effect on the DNA synthesis of lymphoid cells from unsensitized guinea pigs. At certain concentrations in the range of 10(-8) to 10(-6) M, all tested metal compounds stimulated the DNA synthesis of both thymocytes and peripheral lymphocytes after 48 h of culture. The most consistent stimulation with all tested metal allergens was obtained with spleen cells. Thymocytes and spleen cells were stimulated even when the small fraction of adherent cells was eliminated. Mercuric chloride and potassium dichromate were found to be inhibiting at 10(-6) to 10(-4) M, while cobalt chloride and nickel sulfate were less toxic and inhibiting at 10(-4) to 10(-3) M. At 5 h of culture the lowest inhibitory concentration of potassium dichromate was found to be about 100-fold lower than that of nickel sulfate, which may be of practical interest for the choice of concentrations used in human patch test. The lowest concentrations of mercuric chloride and potassium dichromate which at 5 h were inhibitory, were stimulating at 48 h. The presence of serum seemed to have a protective and modifying role regarding the effect of the various metal compounds on the DNA synthesis.
14 citations
TL;DR: An insoluble Cr(VI) compound, lead chromate (PbCrO4), was not cytotoxic nor mutagenic on V79 cells, probably because it is taken up by the cells very slowly, whereas the presence of NTA elicited a direct cytotoxicity and mutagenicity, which was dose-dependent from 5 X 10(-5) M to 10(-4) M PbCr O4.
14 citations