منابع مشابه
Mineralogical Magazine
Tile crystal structures of sjogrenite and pyroaurite, two stacking modifications of approximate composition Mg.Fe.(OH),.(CO.).4H.O, have been determined by X-ray diffraction using three-dimensional methods. Sjogrenite is hexagonal, with a 3,13, C 15.66 A, space group P6.!mmc, Z = !; pyroaurite is rhombohedral, with aH 3,13, CH 23.49 A, space group R3m or R3m, Z = i. Both structures are based on...
متن کاملMineralogical Controls on Cold Desert Weathering
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متن کاملThe effect of cortisone on experimental silicosis.
Alterations in cellular and fibrous tissue reaction due to cortisone and A.C.T.H. have been demonstrated in human beings by several workers such as Freeman, Fershing, Wang, and Smith (1950), and by Cavallero, Sala, Amira, and Borasi (1951) in the carbon tetrachloride necrosis of rats' livers. The influence of cortisone on the phagocytic action of the reticulo-endothelial system on carbon partic...
متن کاملAcute Silicosis
A QUARTER of the earth's crust is composed of silicon, so it is not surprising that the inhalation of dust has been recognised for centuries as a cause of shortness of breath in miners and stone operatives. In 1649 Dimerbrook (Collins, 1915) described chest rigidity associated with dyspncea in the granite workers of the Carpathians, who were themselves painfully aware of the occupational hazard...
متن کاملSilicosis on the Witwatersrand Gold Mines.
Silicosis is an incurable non-infectious occupational disease. It is one of the pneumoconioses, a generic group of long diseases associated with dusty occupations. Silicosis is caused by continuous inhalation of microscopic particles of free silica (quartz) dust measuring from one to three microns in diameter (a micron is equivalent to 0,0001 centimetres). If these particles penetrate to the de...
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ژورنال
عنوان ژورنال: The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists
سال: 1960
ISSN: 0021-4825,1883-0765
DOI: 10.2465/ganko1941.44.118