查询词典 reagent

According to analysis to poisonous grit mineral character,discussion about how to conquer arsenic in vulcanization ore and the investigations of much cassiterite metal vulcanization ore , much cassiterite metal vulcanization ore is a new kind of reagent,it is effective in reducing arsenic.

通过对毒砂矿物性质的分析，探讨硫化矿降砷及锡石多金属硫化矿选别试验，得出锡石多金属硫化矿浮选降砷的有效抑制剂为TS-1新药剂。

Adding methylbenzene into the reaction system as cosolvent ,this can lower the uste amount of DMF and the cost of production .when we chlorinate the Vilsimer reagent and phosphorus oxychloride to sucroste-6-ethal ester is one to ten ,the result of chloridization is the...

探索了氯化后不经三氯蔗糖单酯结晶提纯，直接制备三氯蔗糖的新方法，通过大孔树脂柱，得到了纯度大于95%的产品，终产率高于37%。

Results showed that chloroacetic acid was the best reagent for esterification and the catalyst had satisfactory catalytic activity and selectivity.

实验结果表明，氯乙酸是最佳酯化剂，催化剂具有较强的活性及选择性。

From the results, the extraction was optimized by using microwave-assisted derivatization at 300 watt for 3 sec with methyl chloroformate/methanol derivatization reagent and sample solution in the ratio of 2:1, and then extraction 30 min.

实验结果显示，利用搅拌子吸附萃取法结合气相层析质谱术分析尿液中胺基酸，衍生化功率为300瓦，衍生化时间为3秒，水样与氯甲酸甲酯/甲醇衍生化试剂体积比为2：1时有最佳衍生化条件。

Two methods (Bondi Mueller method and Cortese method )which need not ethyl chloroformate as material or reagent for the synthesis of sodium taurocholate are selected for comparative studies,and the technical conditions,purity and yield of products related to the two methods are compared.

选择无需用氯甲酸乙酯作原料的邦迪缪勒法和柯特斯法进行牛磺胆酸钠的合成研究。

The top conditions, such as, acidity, temperature, consumption of chromogenic reagent were investigated.

本实验进一步探究了实验的最佳条件：酸度、温度、显色剂的用量和显色时间。

The 6-nitro-2-benzothiazolyldiazoaminoazobenzene as a chromogenic reagent was synthesized and its color reaction with nickel has been investigated.

合成了显色剂6 硝基 2 苯并噻唑重氮氨基偶氮苯，并在TritonX 100表面活性剂存在下，研究了其与镍的显色反应。

Extraction spectrophotometric determination of vanadium with BPHA as chromophoric reagent used in the analysis of ores, steel and other metals has been investigated for the analysis of residuum oil.

五价钒与钽试剂在约1.5N硫酸介质中生成的沉淀能定量地被氯仿和乙醇混和溶剂所萃取，形成橙黄色的络合物。

Use: The solvent, colored cinefilm develop pharmaceutical to use as reeling off raw silk from cocoons with polyacrylonitrile fiber, chemical analysis reagent, make plant take off leaf pharmaceutical and herbicide that weed, and rubber industry make rubber deal with pharmaceutical, electroplate industry formulate, plate nickel electroplate liquid.

用作聚丙烯腈纤维抽丝溶剂、彩色电影胶片冲洗剂，化学分析试剂，制造植物脱叶剂和除草的除莠剂，以及橡胶工业作橡胶处理剂、电镀工业配制镀镍电镀液。

Methods Trizol reagent from clamworm digestive tract epithelial cells extracted methods Total RNA. The mRNA was purified and reverse transcripted into cDNA. The cDNA was linked into plasmid pDNR-Lib after digested by nucleate endonuclease Sfi I to construct cDNA library.

分离沙蚕消化道上皮细胞，使用Trizol试剂提取总RNA，纯化mRNA，用MMLV逆转录成cDNA，用Sfi I核酸内切酶酶切后连接到pDNR-Lib质粒中，构建cDNA文库。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。