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目的:查明电厂尘肺发病影响因素。方法:选用尘肺患病率不同的甲、乙两电厂粉尘分别作体外细胞毒性实验和用中子活化法测定粉尘中化学元素含量。结果:甲厂粉尘细胞毒性显著大于乙厂,与尘肺流行病学调查结果相一致。甲厂粉尘中元素含量高于乙厂的元素有 V、Ta、Sc、Lu、Tb、Eu、Sm、Nd、La 等(t 检验,P<0.05)。用逐步回归法分析粉尘中元素含量与红细胞溶血率的关系,发现粉尘中钒和游离 SiO_2含量可贡献红细胞溶血率总变异的84.8%。计算两厂粉尘中元素的尘肺致/抗比值,甲厂比乙厂大25.5倍。结论:揭示粉尘中钒含量或元素的尘肺致/抗比值可能会影响尘肺患病率。
Objective: To identify the influencing factors of pneumoconiosis in power plant. Methods: In vitro and in vitro cytotoxicity tests were conducted on dusts of A and B plants with different prevalence of pneumoconiosis. The chemical elements contents in dust were determined by neutron activation method. Results: The cytotoxicity of A factory dust was significantly greater than that of B factory, which was consistent with the epidemiological investigation of pneumoconiosis. The contents of elemental dust in Factory A were higher than that in Factory B. There were V, Ta, Sc, Lu, Tb, Eu, Sm, Nd, La and other elements in titers (t test, P <0.05). By stepwise regression analysis of the relationship between dust elemental content and erythrocyte hemolysis, it was found that vanadium and free SiO 2 content in dust can contribute 84.8% of the total variation of erythrocyte hemolysis rate. Calculate the two plants dust elemental pneumoconiosis / anti ratio, a plant 25.5 times larger than the B plant. Conclusion: Revealing the ratio of dust to vanadium or elemental pneumoconiosis / anti-pneumoconiosis may affect the prevalence of pneumoconiosis.