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- Keywords catalytic gas liquid isotope exchange method;triptolid;tritiated triptolid; 催化气-液同位素交换法;雷公藤甲素;氚化雷公藤甲素;
- non-equilibrium isotopic exchange method 非平衡同位素交换法
- reverse isotopic exchange method 逆同位素交换法
- isotope exchange method 同位素交换法
- The catalytic gas liquid isotope exchange reaction is a good method to prepare tritiated triptolid. 采用催化气液同位素交换法制备了氚化雷公藤甲素,探讨了反应时间和反应介质对反应产额的影响。
- The exchange method: USD cash in advance. 认购方式:美金现金认购.
- For this purpose, we have investigated the isotope exchange process for the trace recovery from the imitative residue of the alloy. 利用同位素交换法对模拟液态锂铅合金残渣中的微量氚进行回收。
- The extraction rate was higher with the ion resin exchange method than the ethanol extraction method. 中提取生物碱,离子交换法较乙醇提取法的提取率为高。
- The concentration and separation of Np and Pu in TRPO process are studied by anion exchange method. 用阴离子交换法研究了TRPO流程中镎和钚的浓缩和分离。
- Am,Cm were recoveried from filtrate bycation exchange method,so that total losses are not more than 0.0003%. 用离子交换法回收滤液中淀余的镅、锔;使其总损失量小于0.;0003%25
- The technology of separation D-aspartic acid and L-alanine by ion exchange method was investigated. 对离子交换法分离D-天冬氨酸和L-丙氨酸的工艺条件进行了研究。
- Y-MCM-41 containing secondary building units of Y zeolite was prepared and then treated by ion exchange method. 制备了含有Y沸石次级结构单元的Y-MCM-41,并对其进行离子交换处理。
- A new technology to recover potassium carbonate from the wastes of triazolone andmultipIe-effect azole production by exchange method is introduced. 介绍了用离子交换法从生产农药三唑酮、多效唑的废渣中回收碳酸钾的新工艺。
- By means of sister chromatid exchange method (SCE),micronucleus test of bone marrow cells, genetic toxicity of Coprinus comatus was evaluated in mice. 应用小鼠骨髓细胞姐妹染色单体交换(SCE)及微核试验对鸡腿蘑进行遗传毒理检测。
- The VGF, CZ, heat exchange method for Ge single crystals and the cast method for Ge poly-cyrstals was specially discussed. 着重介绍了VGF法制备锗单晶、铸造法制备锗多晶的工艺和装置。简单比较了不同方法制备的锗晶体的主要光学、电学性能及制造成本。
- Choosing imbedding the watermarking in DCT coefficients, according to relative size of DCT coefficient, were using exchange method to imbedding bit information. 选择在IVOP的DCT系数中嵌入水印,根据DCT系数的大小关系,采用交换法嵌入比特信息。
- The discovery of prometheum is presented in detail and emphasis is put on the important role of the ion exchange method in separating and identifying promethium. 本文详细及正确地介绍了放射性元素钷的发现史,特别强调了离子交换技术在钷的分离及鉴定中的重要作用。
- Through the process of saccharification,fermentation,purification with ion exchange method,the refined glycerol was prepared from waste distiller grain. 利用废酒糟,经过糖化、发酵和离子交换法提纯除杂等工艺,生产出精甘油,取得了初步结果。
- The 18O shift may indi-cate the isotopic exchange between water and rocks and the relict of co-diagenetic formation water. ~(18)O漂移可能表明水与岩石发生了氧同位素交换,也可能有少量同生沉积水残存。
- In this experiment , ascorbic acid and palmitate etbylester were used as reactants,and H2SO4 as catalyst to synthesize L-ascorbic palmitate by ester exchange method . 以L-抗坏血酸和棕榈酸乙酯为原料,H2SO4为催化剂,酯交换法合成L-抗坏血酸棕榈酸酯。