The cell toxicity and hemolytic action of asbestos dusts were studied. The toxic effect of asbestos dusts to macrophages was estimated by the change of acid phosphatase activity, TTC reducing capacity and lactic acid yielding power of the cells.

Experiments were performed in order to investigate the cellular damage when asbestos particles were added to rat peritoneal macrophages in vitro. At short time

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Heat treatment of the serpentine minerals changed their biological effects in original This paper describes the relation between the toxic action of heat treated serpentine minerals and the structural changes of serpentine minerals by heat treatment. MATERIALS AND METHOD Specimens used in this study are listed below.

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