The exocrine cells of the mouse pancreas were fixed in potassium dichromate solution, embedded in araldite or other suitable medium, and examined by electron microscopy. Almost every part of these cells is seriously distorted or destroyed by this fixative. The ergastoplasm is generally unrecognizable, the mitochondria and zymogen granules are seldom visible, and no sign of the plasma membrane, ...

This study evaluated the toxicity of hexavalent and trivalent compounds of chromium to the pacu, Piaractus mesopotamicus, in acute exposures of 96 h through mortality and histopathological responses. Hexavalent potassium dichromate was more toxic than trivalent compounds of chromium chloride, chromium oxide and chromium carbochelate. Sufficient mortalities occurred only with potassium dichromat...

UNLABELLED Sodium dichromate dihydrate is one of a number of inorganic compounds containing hexavalent chromium (Cr VI) found in drinking water source supplies as a contaminant resulting from various industrial processes including electroplating operations, leather tanning, and textile manufacturing. Because of the lack of adequate experimental data on the toxicity and carcinogenicity of hexava...

phytoremediation of heavy metals is employed as a technological approach for a non-destructive remediation of contaminated soils. one of the most recently studied tree species used in phytoremediation applications are poplars. in this study, the one-year old rooted seedlings of populus nigra l. used to decontaminate hexavalent chromium-contaminated soils. five treatments of cr (vi) supply (were...

This article presents the regularities of reduction sulfur, nitrate and nitrite ions by sulfur reducing bacteria Desulfuromonas sp., which were isolated from water man-made Yavorivske Lake (Lviv Region, Ukraine), under influence potassium dichromate. in process anaerobic respiration can use reduce different electron acceptors, such as nitrates, nitrites, oxidized forms heavy metals, particular,...

The basis of the method is the measurement of the color change produced by the reducing action of fatty acid or cholesterol on a sulfuric acid-dichromate mixture. This reaction has been used in several ways for the determination of fatty acids and other organic material. Bang (1) made it the basis of a micromethod by titrating the excess of dichromate with starch-iodine and thiosulfate. In this...