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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01 Sep 1963-Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry
TL;DR: It is shown that one-half gram samples of the dichromate can be titrated with a standard deviation of 0.003 percent.
Abstract: A method has been developed for the precise assay of potassium dichromate by constant-current coulometric titration with ferrous ions generated at a platinum cathode. It, is shown that one-half gram samples of the dichromate can be titrated with a standard deviation of 0.003 percent.
24 citations
TL;DR: In this paper, the performance of buffered ferric chloride (FC) as terminal electron acceptor (TEA) in a dual chamber microbial fuel cell (DCMFC) was studied.
Abstract: Electrochemical behaviour of buffered ferric chloride (FC) was studied as terminal electron acceptor (TEA) in a dual chamber microbial fuel cell (DCMFC). The DCMFC was operated in batch mode using lactate as substrate and enriched consortium of sulphate reducing and sulphur oxidising bacteria as anodic biocatalysts. To characterise the TEA in terms of open circuit voltage and power density, four DCMFCs were operated individually under similar anodic operating conditions with phosphate buffer (PB), potassium hexacyanoferrate (PF), potassium dichromate (PD) and FC. Results showed that voltage and power generation with FC were highest among the four TEAs. Performance of the four tested buffered catholytes was found to be in the following order: ferric chloride (857 mV; 308.7 mW/m 2 ) > potassium hexacyanoferrate (571 mV; 222 mW/m 2 ) > potassium dichromate (517 mV; 168.6 mW/m 2 ) > phosphate buffer solution (250 mV; 16.87 mW/m 2 ). With the addition of potassium dichromate, potassium hexacyanoferrate and ferric chloride to phosphate buffer, charge transfer resistance (R ct ) declined by 67%, 52.2% and 51.8%, respectively. Ohmic resistance decreased by 36%, 41.6% and 37.6%, respectively. Electrical conductivity of the leachate after coagulation with ferric chloride increased from an initial of 2.54–7.96 mS thus further supporting the decreased resistance. Further, with no optimization, 50 mM/L of ferric chloride could remove 68.3% of COD having initial value of 9600 mg/L in the cathode chamber.
24 citations
24 citations
TL;DR: It is demonstrated that ginger has potent antioxidants activity, revealed by the amelioration of chromate's toxic effects, which has a protective effect towards damages induced by the chromate.
Abstract: The evaluation of the effect of ginger on the modulation of toxic effects induced by chromate is the objective of our study 50 male rats Albinos Wistar were divided to five groups as follow: group I (T) is served as control, received a mineral water by gavage (per os); group II (G) received an experimental diet with 2% of ginger; group III (Cr) received an oral dose of potassium dichromate (15 mg/kg) and normal diet; group IV (CrG): received an oral dose of potassium dichromate (15 mg/kg) and an experimental diet containing 2% ginger; and group V (Cr(+)G) received an oral dose of potassium dichromate (25 mg/kg) and an experimental diet with 2% of ginger The results of this study indicate that the chromate provoked a haematoxic effect (anemia), nephrotoxic, hepatotoxic, and also a perturbation in lipids profile In addition, chromate has a pro-oxidant effect, which was indicated by decrease of reduced glutathione (GSH) levels in different tissues However, the administration of ginger revealed a reduction of the intensity of oxidative stress induced by the chromate resulting in the decrease of the majority of the previous parameters concentrations In conclusion we demonstrated that ginger has potent antioxidants activity, revealed by the amelioration of chromate's toxic effects We can say that ginger has a protective effect towards damages induced by the chromate
24 citations
TL;DR: The patch test for photosensitive dermatitis and the data of the Allergy Clinic of the Department of Dermatology of Tokyo University Hospital for the past three years are presented.
Abstract: photosensitive dermatitis. JAm Acad Derm 1986: 15: 1237-1241. 6. Masuda T, Honda S, Nakauchi Y et a!. Patch test: the data of the Allergy Clinic of the Department of Dermatology of Tokyo University Hospital for the past three years. Jpn J Dermatol Ser B 1970: 80: 133. 7. Rudner E J, Clendenning WE, Epstein E. Epidemiology of contact dermatitis in North America. Arch Dermatol 1973: 108: 537. 8. Hannuksela M, Kousa R, Pirila V. Allergy to ingredients of vehicles. Contact Dermatitis 1976: 2: 205. Contact Dermatitis 1989: 21: 351
24 citations