Showing papers on "Sodium dichromate published in 1990"
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TL;DR: The results suggest that dichromate possesses a characteristic dual action on cellular metabolism, which might be related to its metabolic fate.
Abstract: The effect of sodium dichromate on cellular metabolism was investigated. Intraperitoneal injection of sodium dichromate into the rat (20 or 40 mg/kg) caused significant increases in serum lactate, pyruvate, and creatinine concentrations within 15 min after intoxication. Severe hyperglycemia occurred thereafter, as a result of increased hepatic glycogenolysis, which was seen in the first 2 h after dichromate. However, liver glycogen was resynthesized in 24 h-fasted rats after glucose refeeding. Dichromate decreased serum total amino acids, with a consequent increase in blood urea nitrogen (BUN) concentration. Unlike HgCl2 (2 mg/kg, i.p.), As2O3 (5 mg/kg, i.p.), and KCN (5 mg/kg, i.p.), dichromate showed the largest metabolic disturbance only in the early period after treatment. In addition, dichromate produced cyanosis, which appeared during the period of the accelerated glycolysis and breakdown of creatinine phosphate. Regardless of chemical species, only the hexavalent chromium compounds had an effect on the cellular metabolism. Trivalent chromium compounds had no effect at all. These results suggest that dichromate possesses a characteristic dual action on cellular metabolism, which might be related to its metabolic fate.
16 citations
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09 Oct 1990TL;DR: In this article, a corrosion resistant stainless steel article is provided with a substantly uniform black oxide coating over the surface thereof, the article being formed from a steel alloy in martensitic structure which is treated in a boiling aqueous alkaline-chromate-oxidizing solution containing sodium hydroxide, sodium nitrate and sodium dichromate at a temperature in the range from about 230° F. to about 260° F for 30 to 60 minutes.
Abstract: A corrosion resistant stainless steel article is provided with a substantly uniform black oxide coating over the surface thereof, the article being formed from a steel alloy in martensitic structure which is treated in a boiling aqueous alkaline-chromate-oxidizing solution containing sodium hydroxide, sodium nitrate and sodium dichromate at a temperature in the range from about 230° F. to about 260° F. for 30 to 60 minutes.
15 citations
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TL;DR: After the administration of equal doses of sodium dichromate, chromium concentrations in the kidney were lower in young than in adult rats, suggesting age‐dependent differences in chromate nephrotoxicity may be linked to an increase in the enzymatic reduction of Cr(VI) with age.
Abstract: After the administration of equal doses of sodium dichromate, chromium concentrations in the kidney were lower in young than in adult rats. To test the age-dependent sensitivity to the nephrotoxicity of dichromate, young and adult rats were given doses to achieve identical chromium concentrations in the kidney. At equal renal concentrations, young rats had less functional and morphological damage than adult rats. As phenobarbital treatment in young rats enhanced the symptoms of nephrotoxicity and metyrapone treatment in adult rats decreased the symptoms of nephrotoxicity, age-dependent differences in chromate nephrotoxicity may be linked to an increase in the enzymatic reduction of Cr(VI) with age.
9 citations
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TL;DR: Whether there is a connection between the activity of chromate reduction in vitro and nephrotoxicity in vivo and whether the kidneys of young rats are less susceptible to chromate than those of adults is investigated.
4 citations
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TL;DR: A series of isoxazole-4-carbaldehydes 3 have been readily prepared by simple oxidation of the corresponding isoxoxolylalcohols 2 with sodium dichromate in dimethylsulfoxide.
Abstract: A series of isoxazole-4-carbaldehydes 3 have been readily prepared by simple oxidation of the corresponding isoxazolylalcohols 2 with sodium dichromate in dimethylsulfoxide
2 citations
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12 Jan 1990
TL;DR: In this paper, a flat tetrahedron-shaped crystal form was obtained by treating cristobalite with hydrochloric acid with sugar and furthermore with an aq. soln. with a specified catalyst.
Abstract: PURPOSE:To obtain sodium chloride having flat tetrahedron-shaped crystal form by treating an aq. soln. of sodium chloride with a specified catalyst. CONSTITUTION:An aq. soln. obtd. by treating cristobalite with hydrochloric acid is added with sugar and furthermore with an aq. soln. of sodium dichromate added with a small amt. of iron chloride to obtain the catalyst for giving the flat tetrahedron-shaped crystal form. A concd. sodium chloride aq. soln. is added with 0.01-1wt.% the catalyst and evaporated to dry. The obtd. solid is added with distilled water to dissolve and again evaporated to dry. The dissolution- evaporation to dry operation is carried out several times, thereafter the catalyst is filtered off from the soln. and the filtrate is evaporated to dry. Thereby, a mixture of sodium chloride having the flat tetrahedron-shaped crystal form and sodium chloride convertible into the flat tetrahedron-shaped crystal form, is obtd. The former sodium chloride having the new crystal form improves the stability of a medicine for external skin application and the latter convertible sodium chloride accelerates activation as an aq. soln. together with iron chloride in the same way as the former.
2 citations