查询词典 retarding agent

In the rapid ampoule determination of low concentration iron in water phenanthroline is used as developing agent.

测定条件；油田水分析；中低浓度；吸光度；准确度；铁含量；快速测定法；铁水样；目视比色法；灵敏度

The lignin-quaternary/polyvinyl alcohol composite resin was made from lignin after phenolization and amination,using glutaraldehyde as cross-linking agent,PVA as carrier.

利用木质素为原料，经酚化、胺化改性后，以戊二醛为交联剂，聚乙烯醇为载体，合成了季铵型木质素/PVA复合阴离子交换树脂。

In Chapter 3, the separation of Fe〓, Co〓, Ni〓, Zn〓, Cu〓 by CE in the presence of imidazole or phenylamine as UV-absorbing background electrolyte and α-hydroxybutyric acid as the complexing agent with indirect UV absorbance was investigated.

在第三章，研究了以咪唑或苯甲胺为背景吸收电解质，α-羟基异丁酸为络合剂，采用毛细管离子电泳间接紫外法测定了镍矿石中Ni，Co，Cu的含量。

Cent of 玀 HCC97H cell is contrast group of group, HGF group, brilliant mildew vegetable, reach Western Blot with RT-PCR respectively the metabolic circumstance of afore-mentioned target albumen after change of level of Sp1 of analysis and VEGF MRNA, protein expression and Sp1 level, phosphation and applied Sp1 block break element of agent brightness mildew.

将MHCC97H细胞分为对照组、HGF组、光辉霉素组，分别用RT-PCR及Western blot分析和VEGF mRNA、蛋白质表达及Sp1水平、磷酸化Sp1水平变化以及应用Sp1阻断剂光辉霉素后上述目标蛋白的变化情况。

Methods Cyclohexane, ethyl acetate and glacial acetic acid (8∶8∶0.8) were used as the developing solvent. Samples were analyzed on a layer plate of silica gel G thin by using 20% phosphomolybdic acid as chromogenic agent.

以环己烷乙酸乙酯冰醋酸（体积比8∶8∶0.8）为展开剂，以羧甲基纤维素钠为黏合剂自制硅胶G薄层板，20％磷钼酸溶液为显色剂，进行薄层色谱分析。

This paper reports the study for phosphomolybdic acid H 3[P(Mo 3O 10 4]·xH 2O as catalyst and anhydrous magnesium sulfate as drying agent used in the esterification of hexanoic acid and ethyl alcohol.

报道了以磷钼酸为催化剂，以无水硫酸镁为吸水剂，催化脱水合成己酸乙酯。

The experiment makes clear, should wear mine size - 0.074 mm is occupied 95%, ore pulp chroma is 30%, ph value is 7, catch receive a dose (huang yao of fourth ammonium black medicine and butyl presses 1 ∶ 1 make up), activator , dispersive agent 6 slant phosphori

实验表明，当磨矿粒度-0.074 mm占95%、矿浆浓度为30%、ph值为7.0、捕收剂(丁铵黑药和丁基黄药按1∶1配制)、活化剂、分散剂的用量分别为240 g/t、800 g/t、800 g/t时，粗选铜的回收率为64.65%，粗精矿铜的品位达到4.54%。

Instead of environmentally toxic chromium oxidant, singlet oxygen generated photochemically was used as environmentally friendly and benign oxidizing agent to accomplish the transformation of pseudodiosgenin diacetate to diosone efficiently in a low toxic and less expensive solvent acetone.

裂解薯蓣皂甙元所得的假薯蓣皂甙元，在低毒且廉价的丙酮溶剂中，在光敏剂和光的存在下，与氧气反应，得到的产物再经酸解消除反应得到合成其它多种甾族药物的重要前体16-脱氢孕烯醇酮醋酸酯。

Crosslinked carboxymethyl cellulose;phragmoid addition agent;film;property

交联羧甲基纤维素；成膜助剂；薄膜；特性

The invention is characterized in that phthalide of general formula, wherein n and X have the meaning cited in the description, is reacted with nitrogen heterocycles of general formula: H-Z, wherein Z has the meaning cited in the description, or with nitrogen heterocycle metal salts of general formula in the presence of an aprotic polar diluent and optionally in the presence of a basic auxiliary reaction agent.

本发明涉及制备通式的2－杂环基甲基苯甲酸衍生物的新的方法，其中n、X和Z具有说明书中给出的意义，该方法提供高收率和高纯度，其特征是，通式的2－苯并呋喃酮，其中n和x具有说明书中给出的含义，与通式的氮杂环：H－Z，其中Z具有说明书中给出的意义，或与通式的氮杂环的金属盐在质子惰性极性稀释剂中并任选在碱性反应助剂存在下反应。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"