查询词典 carboxylate

The products were identified by IR,NMR,MS and elemental analysis. In our method,K.OH was used in place of NaOH to synthesize benzyl ester of 3,5-dimethyl-4-hydroxybenzoic acid,2',6'-dimethyl-4'-(n-succinimidyloxycarbonyl) phenyl-acridinium-9-carboxylate was purified on a silica gel column with chloroform/ethylacetate(4:l,v/v) as eluent and further purified by triturating with hexane/acetone(2:l,v/v).The luminescence produced by DMAE-NHS is a flash light with maximumemission at 0.4s and decay half-time of 0.9s. The luminescence intensity is 6.11x10 cps/mol,which is affected by the composition of trigger and surfactant.

DMAE·NHS的合成是本论文的关键和难点，我们对文献方法进行改进：文献方法用氢氧化钠与3，5-二甲基-4-羟基苯甲酸反应制得3，5-甲基-4-羟基苯甲酸钠，再用3，5-二甲基-4-羟基苯甲酸钠与苄氯作用制备3，5-二甲基-4-羟基苯甲酸苄酯，我们用氢氧化钾代替氢氧化钠，使合成取得成功；在合成2'，6'-二甲基-4'-苯基-吖啶-9-甲酸酯时，文献方法对粗产品进行两次硅胶柱层析纯化，第一次柱层析用氯仿/乙酸乙酯(4：1，Ⅴ：Ⅴ)作溶剂和淋洗剂，第二次柱层析用己烷/丙酮(2：1，Ⅴ：Ⅴ)作溶剂和淋洗剂，按照文献方法得到的不是所需要的化合物，我们只进行第一次柱层析纯化，然后用己烷/丙酮(2：1，Ⅴ：Ⅴ)进行研磨，过滤，洗涤，除去溶于己烷/丙酮(2：1，Ⅴ：Ⅴ)的部分，得到所需要的产品。

The interfacial activities of alkyl sulfonate and its combined systems with petroleum carboxylate have been studied and mensurate the adsorption of compound surfactant on oil sand in Daqing oil field.

摘要研究了石油羧酸盐与不同磺酸盐的复配体系的界面活性，测定了复配表面活性剂在大庆油砂上的吸附量。

By synthesizing the hapten LBc starting from the metabolite of bifenthrin (2-methyl-3-phenylbenzyl alcohol), LBs (2-methyl[1,1-biphenyl]-3-ylmethyl 3-carboxyl-2,2-dimethylcyclopropane carboxylate and Lby (2-methyl[1,1-biphenyl]-3-ylcarboxylic acid , Three haptens were praparaed which were used in next step.

利用联苯菊酯的代谢物联苯醇合成了联苯菊酯的半抗原LBc(2-甲基-3-苯基苄基氧基羰基丙酸)、LBs(2-甲基-3-苯基苄基-3-羧基一2，2-二甲基环丙烷羧酸)和LBy(2-甲基-3-苯基苯甲酸)。

Once the prodrug is in the blood supply, esterases hydrolyse the ester to unmask the carboxylate group and the drug can interact with its target.

药物的醚作为前体药物，口服作用时，由于醚把羰基官能团的极性遮掩了，前体药可以穿越肠内壁的细胞膜，一旦前体物进入血液循环，就会发生水解暴露出羰基使药物与目标相互作用。

The results indicate that there are two basic coordination structure units in the ionomers. The first is a square planar coordination structure of Cu2+ ion with oxygen atoms which come from two carboxylate groups.

它是多原子气休或凝聚态物质的X一射线吸收系数在吸收限高能侧30一1000eV范围内随X一射线能量增加而起伏振荡的现象。

Ion chromatography analysis on the leachates shows that formate generally exists as dominant short-chain carboxylate species.

浸取液的离子色谱分析表明，大井银铜矿各矿化阶段的成矿流体中普遍存在以甲酸为主要物种的短链羧酸。

In the research of the Silver Carboxylate conductive ink, the silver citrate emulsion was synthesized through the reaction of silver nitrate with sodium citrate in the presence of Polyvinylpyrrolidone as a protected agent in water, then the silver citrate emulsion was deoxidized by aqueous ascorbic acid to get the nano-silver colloid.

在有机酸银导电油墨研究中，在高分子保护剂聚乙烯基吡咯烷酮存在的条件下，通过柠檬酸钠与硝酸银反应，合成了柠檬酸银乳液，并用抗坏血酸对柠檬酸银乳液进行还原，制得了纳米银胶导电油墨。

Carboxylate ; two-component combination ; transient interface low-tension ; interface active agent

石油羧酸盐；复合体系；动态低界面张力；界面活性物质

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。