Download Biological and Environmental Aspects of Chromium by S. Langard, S. Langård PDF

By S. Langard, S. Langård

Organic and Environmental elements of Chromium specializes in the organic and environmental elements of chromium and its compounds, with emphasis at the most crucial features in their toxicology and body structure. subject matters lined variety from the creation and occupational publicity of chromium compounds to the presence of chromium in air, soil, and average waters. The purposes of chromium in cellphone biology and medication also are discussed.

Comprised of eleven chapters, this quantity starts off with an summary of the poisonous and carcinogenic results of chromium and chromium compounds, through a dialogue at the construction and occupational publicity of chromium compounds. The reader is then brought to the extra universal analytical tools utilized in the choice of chromium in environmental and organic samples. next chapters discover the dietary function of chromium; absorption, delivery, and excretion of chromium in people and animals; mutagenic and cytogenetic results of chromium compounds; and organ toxicity of chromium in animals. The carcinogenic results of chromium, together with its results at the pores and skin, also are considered.

This monograph could be of curiosity to scholars, practitioners, and researchers within the fields of biology, body structure, and chemistry, in addition to people with an goal curiosity within the ways that chromium and its compounds act in organic fabrics and within the human setting.

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The major source of chromium pollution in the workshop air in chromium plating plants is the droplet spray caused by the bursting of hydrogen bubbles produced at the electrodes due to electrolysis of the bath. This process, which is the same mechanism which introduces salt into the atmosphere above the surface of the sea, and can be observed over the surface of a fresh cold glass of carbonated liquid, produces a liquid drop aerosol whose size distribution depends on the bubble size and surface tension of the bath, which in turn determine the liquid content of the bubble film at bursting.

Mikami, H. and Murao, M. (1978) Thorax 33, 3 7 2 - 2 7 4 . Okubo, T. and Tsuchiya, K. (1977) Keio J. Med. 26, 171-177. Olsen, Ε. D. and Foreback, C. C. (1970) in Encyclopedia of Industrial Chemical Analysis (Snell, F. D. and Ettre, L. ) Vol. 9, pp. Y. Olsen, P. T. (1980) Welding and the Working Environment, National Technological Institute, Oslo. , Wedel, Η. and Wühelmsen, L. (1979) Arc. Environ. Health 34, 2 1 1 217. Palselius, A. (1979) Report 79504, IVF, Göteborg, Sveriges Mekanförbund, Stockholm.

Hygienic measurements have been made for three plants, where several occupational activities were studied. 20 (after Langard and Norseth, 1975). 2 mg/m (for the same operation in plant C). 20. 20 Mean values and range of total dust and Cr exposure in the pigment industry (after Langârd and Norseth, 1975). 4 Β Sackfilling Mixing raw materials Foreman C Sackfilling Fixing raw materials * 95% confidence intervals with log normal distribution. Total Dust 3 mg/m X R. M. Stern 44 In a second study of similar plants (Davies, 1978, 1979) work was merely divided into dusty (dry end) and low dust (wet end) exposures: this study, however, indicates that the mean occupational exposure for the work force is approximately 15 years, while less than 25% of the work force was occupied for less than 1 year.

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