right-hand thread,right hand worm,right hand screw thread

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。

Determination of D-borneol in the Remnant of Nature Borneol by Capillary Gas Chromatography;

毛细管气相色谱法测定天然冰片遗留物中右旋龙脑的含量

Preparation of D-borneol by Asymmetric Reduction of Camphor;

樟脑不对称合成右旋龙脑

The chemical structure of D-camphor is resemblant to D-borneol.

5,反应时间为40 min,利用这种方法还原樟脑,主产物为右旋龙脑,副产物为异龙脑,两者的比例几乎固定不变。

Interactions between cationic gemini surfactants and dextran in aqueous solution;

水溶液中阳离子Gemini表面活性剂与右旋糖苷相互作用

The E. coil L-asparaginase was Modified with Activated Dextran and PEG-2;

右旋糖苷及PEG-2对大肠杆菌L-天冬酰胺酶的化学修饰

Chemical Modification of Escherichia coli L-Asparaginase with Dextran;

右旋糖苷对大肠杆菌L-天门冬酰胺酶Ⅱ的化学修饰

Preparation and Evaluation of BMP_2 Carrying Gel Microspheres by Dextran-glycidyl Methacrylate;

右旋糖酐-甲基丙烯酸缩水甘油酯载BMP_2凝胶微球的制备与评价

Study on the production of dextran by fermentation;

发酵法生产右旋糖酐的工艺研究

Studies of dextran production with immobilized Leuconostcmesentercides cells;

固定化肠膜状明串珠菌生产右旋糖酐的研究