目的：观察中间普氏菌和脆弱类杆菌的内毒素对人牙周膜细胞增殖和超微结构的影响。
AIM: to examine the effect of endotoxin of prevotella intermedia and bacteroides fragilis on proliferation and ultrastructure of periodontal ligament cells in vitro.
方法应用动态比浊法定量检测大容量注射剂类药品中细菌内毒素的含量，分析实验中的问题并解决。
METHODS According to the appendix of China Pharmacopoeia(2000 edeition)study the feasibility of quantificationally detecting bacterial endotoxin in large volume injections.
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