960 resultados para Southwest Guizhou
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Title from cover.
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Jin ming Qianxi xian.
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Double leaves, oriental style, in case.
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Double leaves, oriental style, in case.
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Mode of access: Internet.
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Vols. for 196 - contain also in the title the year covered, e.g. Publications for 1973.
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Mode of access: Internet.
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"May 17, 1988."
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Includes bibliography.
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Mode of access: Internet.
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Mode of access: Internet.
Forest diseases in California : problems and the research program of the Pacific Southwest Station /
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"August 1961."
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The extent of exposure of residents of Changqing (Guizhou, PR China) to arsenic through coal-burning was investigated. Despite the low coal-arsenic content (56.3 +/- 42.5 mg As kg(-1)) when compared with coals collected at different location and times from the same province, more than 30% of the study subjects have shown symptoms of arsenicosis. Coal, urine, hair, and water samples were collected in mid-September 2001 and analysed for arsenic. The average urinary and hair-arsenic concentrations in the exposed subjects were 71.4 +/- 37.1 mug As g(-1) creatinine (control 41.6 +/- 12.1) and 7.99 +/- 8.16 mg kg(-1), respectively. A positive correlation between the hair and urinary-arsenic concentration (R-2 = 0.601) was found. There was no significant difference between females and males for both urinary and hair-arsenic concentrations. Females were found to have a higher dimethylarsinic acid but lower percentages of inorganic arsenic and monomethylarsonic acid in their urine than males. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.