Showing papers on "Potassium dichromate published in 1971"
TL;DR: Golgi preparations were made by consecutive treatment of formalin-fixed brain and liver with potassium dichromate and silver nitrate as discussed by the authors, which proved to contain crystalline silver chromate, Ag2CrO4.
Abstract: Golgi preparations were made by consecutive treatment of formalin-fixed brain and liver with potassium dichromate and silver nitrate. Impregnated tissue dissected from thin slices of the blocks were studied by X-ray powder diffraction methods, in a diffractometer and a Guinier camera. Such tissue proved to contain crystalline silver chromate, Ag2CrO4, both while still in the silver nitrate solution and after dehydration in ethanol and clearing in xylene and xylene-Dammar resin. No other compounds containing chromium or silver were detectable. Formalin-fixed tissue merely treated with silver nitrate contained silver chloride, but in impregnated tissue the amount was too scarce to be visible. Hence, silver chloride was no integral part of the Golgi precipitate.
45 citations
TL;DR: Evidence has been obtained that the precipitate, prior to the final alkalinization process, is mercurous chloride (calomel, Hg2Cl2), and it appears reasonable to assume that, when no crystalline compounds can be detected, metallic liquid mercury is formed.
Abstract: An investigation was carried out to determine the nature of the precipitate in a technique which was originally proposed by Golgi and, later, modified by Cox, to stain nerve cells by the treatment of tissue with potassium dichromate and mercuric chloride
20 citations
TL;DR: The addition of 0.3% Ferrous Sulphate to patch tests with cement reduced in sensitive individuals the intensity of patch test reactions and abolished it in some altogether, suggesting possibilities of preventing cement-induced Chromate sensitivity.
Abstract: Ferrous Sulphate combines with Potassium Dichromate in cement to form an insoluble compound. The addition of 0.3% Ferrous Sulphate to patch tests with cement reduced in sensitive individuals the intensity of patch test reactions and abolished it in some altogether. Patients with a normal skin alkaline resistance test benefitted most. These observations suggest possibilities of preventing cement-induced Chromate sensitivity.
9 citations
TL;DR: In this article, the water in the solvent is made to react with potassium dichromate to produce potassium chromate and chromic acid, the latter is soluble in the solvents.
9 citations
TL;DR: In this article, a method was described to convert elemental tellurium and organotellurium compounds quantitatively to Te(IV) by digestion with a mixture of nitric and sulfuric acids in the micro-Kjeldahl flask.
Abstract: A method is described to convert elemental tellurium and organotellurium compounds quantitatively to Te(IV) by digestion with a mixture of nitric and sulfuric acids in the micro-Kjeldahl flask. After removal of nitrogen oxides by means of urea, exactly 5 ml of 0.02N potassium dichromate is added, whereupon Te(IV) is oxidized to Te(VI). The tellurium content of the sample is related to the amount of dichromate consumed, the latter being determined either spectrophotometrically or by back-titration with 0.02N ferrous sulfate. This method, applicable to 1–4 mg of tellurium, is amenable to automation and multi-element determinations.
5 citations
TL;DR: JIS法では塩化水銀の純分やフェライトの鉄分の定量に適用した, 本法によればそれを避けることができる.
Abstract: 塩酸酸性溶液中で鉄(III)をアルミニウムはくで鉄(II)に還元し,重クロム酸カリウム標準液で滴定して鉄を定量する方法を検討した.Riegelらの方法よりも迅速な方法が得られ,酸化鉄の純分やフェライトの鉄分の定量に適用した.その結果はJIS法によく一致し,定量値の標準偏差(σ)は0.100であった.JIS法では塩化水銀による廃水の汚染が避けられないが,本法によればそれを避けることができる.
1 citations