To study the subchronic toxicity of formaldehyde by inhalation in rats.
研究甲醛经呼吸道染毒的亚慢性毒性作用。
Methods A short-term and a subchronic test on rats were respectively carried out to study the toxicity of low-dose T-2 toxin by observing the histopathological changes of transparent cartilage.
方法利用大鼠进行短期毒性实验和亚慢性毒性实验，通过透明软骨的组织病理改变来观察低剂量T-2毒素对软骨的损伤作用。
Methods Subchronic toxicity test was applied. The rats were exposed to arsenic by oral perfusion at gradient doses for 6 weeks respectively.
方法采用亚慢性毒性试验方法，大鼠经口灌胃染毒，试验期为6周。
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