랫드에 투여된 규회석이 호흡기계에 미치는 영향 연구 = Toxicity study of Wollastonite to the Respiratory Systems in Sprague-Dawely Rats

다국어 초록 (Multilingual Abstract)

Occupational exposure to wollastonite can occur during its mining, processing and using. Wollastonite was analyzed for its physicochemical properties by transmission electron microscope and scanning electron microscope equipped with energy dispersive X-ray spectrometer. Wollastonite fibers were 3.3㎛ in diameter(av.) and were 30.5㎛ in length(av.). The atomic composition of wollastonite was Si 56.41% and Ca 43.59%. Respiratory toxicity of wollastonite has been studied in term sequential in Sprague-Dawely rats. UICC chrysotile(average diameter 0.03㎛, average length 2.93㎛) was applied as the positive control. The effects of 2㎎ wollastonite on respiratory system and pathological changes were evaluated after 1, 4, 8, 12 weeks instilled into rat lungs. Inflammation response broke out from 1 week after instilled with wollastonite and the pathological examination further showed increased legions of granulomatous inflammation after 4 weeks, but decreased granulomatous inflammation after 8 weeks, whereas chrysotile induced progressive interstitial granulomatous inflammation and fibrosis as a function of time.

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