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被吸人肺内的粉尘大多数是无害的,例如碳粒。但二氧化矽与石棉却能刺激肺组织引起纤维化。作者在文内叙述了二氧化矽和石棉颗粒对细胞的毒性作用。二氧化矽是岩石中的主要成份,天然的二氧化矽分为无定形和结晶形。在结晶形的二氧化矽中,除了Stishovite(在极高的温度和压力下形成的结晶)是八面体结晶外,其它都是四面体结晶。石棉的主要成分是各种矽酸盐。天然石棉有温石棉和角闪石石棉两大类。温石棉占天然石棉矿的90%以上,是一种含水的矽酸镁盐,具有管状的外形,管的直径是150～
Most of the dust inhaled in the lungs is harmless, such as carbon particles. However, silica and asbestos can stimulate lung tissue to cause fibrosis. The author describes the silica and asbestos particles on the cell toxicity. Silicon dioxide is the main component of the rock, the natural silica is divided into amorphous and crystalline. In crystalline silica, except Stishovite (a crystal formed at very high temperatures and pressures) is octahedral crystals, the others are tetrahedral crystals. Asbestos is the main component of a variety of silicate. Asbestos natural asbestos and amphiboles asbestos two categories. Chrysotile asbestos accounts for more than 90% of natural asbestos, is an aqueous magnesium silicate salt, with a tubular shape, the diameter of the tube is 150 ~