This thread combined laevogyrate thread and dextral thread together in the same part of the thread.
发明了一种新型螺纹—唐氏螺纹，这种螺纹采用的是变截面非完整螺纹，并且将左旋和右旋螺旋线复合 在同一段螺旋线上，具有左、右放螺纹的特点，可分别与左、右旋螺纹配合。
Optical Purity Analysis of Levodopa Drug by Capillary Electrophoresis;
毛细管电泳法测定左旋多巴药片的光学纯度
Preparation and the influencing factors of Levodopa Liposomes;
左旋多巴脂质体的制备及影响因素
Study on the Determination of Levodopa by Flow-Injection Electrogenerated Chemiluminescence;
流动注射电化学发光分析法测定左旋多巴的研究
A kind of biodegradable material poly (L-lactic acid)-polyethylene glycol (L-PLEG) was synthesized directly via melt polycondensation process with taking L-lactic acid (L-LA) and polyethylene glycol (PEG) having number average relative molecular mass (M_n) 1000 as raw materials.
直接以左旋乳酸(L-LA)单体和数均分子量为1000的聚乙二醇(PEG)为原料,通过直接熔融共聚法,合成了聚乳酸-聚乙二醇(L-PLEG)适宜的工艺条件为：以SnO为催化剂[m(SnO)/m(L-LA)为0。