Scanning electron microscope and transmissional electron microscope were used to observe the ultrastructural changes of respiratory tract in rabbits inhaling low concentration of diphosgene.
用扫描电镜和透射电镜观察低剂量双光气吸入中毒所致家兔呼吸系统损伤的超微结构改变。
The triphosgene, being as the substitute for phosgene and diphosgene in synthesis, is not only low-toxic but also safe and convenient to use with mild conditions, good selectivity and high yields.
三光气作为剧毒的光气和双光气在合成中的替代物，不但毒性低，使用安全方便，而且反应条件温和、选择性好、收率高。
The triphosgene, being as the substitute for phosgene and diphosgene in synthesis, is not only low-toxic but also safe and convenient to use with mild conditions, good selectivity and high yields.
三光气作为剧毒的光气和双光气在合成中的替代物，不但毒性低，使用安全方便，而且反应条件温和、选择性好、收率高。
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