نتایج جستجو برای: trivalent chromium

تعداد نتایج: 26790  

2016
Alice

Before you make the junkyard your new jaunt, it's a good idea to take a look at some of the research on the impact of chromium supplements on metabolism and weight loss. One type of chromium (more on those in a bit), trivalent chromium, has been shown to enhance the effectiveness of insulin, a hormone that helps metabolize and store carbohydrates, fat, and proteins in the body. While researcher...

2009
Bahri Başaran Ahmet Aslan

Basic chromium sulphate is the most versatile and common tanning agent in the leather industry. Under certain circumstances, the oxidation of the trivalent chromium salts into the hexavalent compounds, which are used in leather manufacture, is a crucial issue. In this study, different proportions of basic chromium sulphate were used in tanning and re-tanning processes according to a commonly us...

2014
J. Chandhuru S. Harshitha K. Sujitha Mukesh Kumar

The ability of Bacillus sp. MRKV isolated from tannery effluent which shows resistant towards hexavalent chromium potassium dichromate (K2Cr2O7) was evaluated in this study. The bacterial strain was assayed for its reducing ability towards K2Cr2O7. The study revealed that the isolated strain has the ability to reduce the hexavalent chromium and the optimal conditions required for the chromium r...

Journal: :iranian journal of toxicology 0
زینب عابدی zeynab abedi department of fisheries, faculty of animal sciences and fisheries, sari agricultural sciences and natural resources university (sanru), sari, iran. محمدکاظم خالصی mohammad kazem khalesi department of fisheries, faculty of animal sciences and fisheries, sari agricultural sciences and natural resources university (sanru), sari, iran. سهراب کوهستان اسکندری sohrab kohestan eskandari department of fisheries, faculty of animal sciences and fisheries, sari agricultural sciences and natural resources university (sanru), sari, iran.

background: in natural waters and/or aquaculture facilities, fish are often exposed to chromium waste and demonstrate cumulative deleterious effects. to our knowledge, there are no studies concerning the effects of trivalent cr on c. carpio hematology. this study presents hematological and some biochemical parameters of common carp, cyprinus carpio, affected by sublethal concentration of trival...

Journal: :Environmental Health Perspectives 1991
S A Katz

The essentiality and carcinogenicity of chromium depend on its chemical form. Oxidation state and solubility are particularly important in determining the biological effects of chromium compounds. For this reason, total chromium measurements are of little value in assessing its nutritional benefits or its toxicological hazards. Aqueous sodium carbonate-sodium hydroxide solutions have been succe...

Journal: :International archives of occupational and environmental health 1984
A Aitio J Järvisalo M Kiilunen A Tossavainen P Vaittinen

Two workers exposed to trivalent chromium sulphate in a leather tannery had high concentrations of chromium in the urine. The concentration of chromium showed a workshift-related diurnal fluctuation, but it was remarkably high even after a vacation, indicating accumulation of chromium in the body. The concentrations of chromium in the workplace air, as collected on filters using standard techni...

2016

A mixed plating rinse wastewater containing zinc, hexavalent chromium, trivalent chromium, and cyanide with total dissolved solids of 424 mg/1 was treated by a model consisting of a sand filter and ion exchange columns. A strongly acidic cation resin in hydrogen form and a strongly basic anion resin in hydroxide form were used in the columns as cationic and anionic exchangers, respectively. The...

2012
Wang Xing-run Zhang Yan-xia Wang Qi Shu Jian-min

With the building wastes contaminated by chromium in Haibei Chemical Plan in China as objects, we studied the contents of total Cr and Cr (VI) of different sizes, analyzed the effect of 6 different washing agents, discussed the removal mechanisms of 6 different washing agents for Cr in various forms, and finally selected applicable washing agent. As per the results, particle size had little imp...

Journal: :Environmental Health Perspectives 1981
Tor Norseth

The carcinogenicity of chromium compounds is reviewed with specific attention to the gaps in knowledge for risk estimation and research needs. The most important problems at present are whether trivalent chromium compounds cause cancer, and whether there is a difference in cancer causing effects between the soluble and the slightly soluble hexavalent compounds in the practical exposure situatio...

2006
Z. Krejpcio

The aim of this paper is to review current knowledge about the essentiality of trivalent chromium for animal and human nutrition, and its biological function with special reference to its role in carbohydrate and lipid metabolism, dietary intake and recommendations.

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