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Thirteen benzimidazole derivatives were synthesized by one-step oxidative cyclisation of 1, 2-phenylenediamine or 4-methyl-1, 2-phenylenediamine at room temperature and a series of aromatic aldehydes under imidazolium salt grafted iodobenzene diacetate assisted.

以水为溶剂,在咪唑盐二醋酸碘苯促进下,通过邻苯二胺或4-甲基邻苯二胺与各种芳醛室温氧化环合,一步合成了13种苯并咪唑类衍生物,反应时间25~45 min,反应产率92%~98%。

Gel-type cross-linked polystyrene-isocyanuric acid resin has been obtained by reaction of chloromethylated polystyrene with isocyanuric acid under the existence of triethylamine.

由氯甲基化低交联聚苯乙烯和异氰尿酸在三乙胺作用下反应,制得了凝胶型交联聚苯乙烯-异氰尿酸树脂,测定了该树脂对苯酚和间苯二酚在不同温度下的吸附等温线,依据Clapeyron-Clausius方程从吸附等温线计算出了吸附热,从热力学的角度论证了树脂是基于氢键键合和疏水作用而吸附苯酚和间苯二酚的。

Based on adsorption theories, the Langmuir model and the Polanyi Poten- tial theory were used for correlating the equilibrium data of the isothermic adsorption for the zeolite 13x-Water pair.

本文根据吸附理论,利用朗格缪尔模型和巴兰尼吸附位能理论模型对沸石13X-水的实测平衡数据进行等温吸附曲线拟合。

A question only know that these mountains so named because many monkeys, cliffs, treetops jian monkeys often come and go, NI squad leader once encountered. Early in April, he was measured in the mountain traverse, a naughty monkey while it is not prepared to kettle to "steal" away, put him half a day without water to drink and water bottles were later found hanging in a tree Lindera, the Since then, this thing has become the officers and men of the joke.

一问才知道,这些山因猴子多而得名,悬崖峭壁、山尖树梢常有猴子出没,倪班长就曾遇到过。4月初,他在山上测量附合导线,一只顽皮的猴子趁其不备,把水壶&偷&走了,害得他半天没水喝,后来才发现水壶被吊在树桠上,这事儿从此成了官兵们的笑谈。

The fitting method of dynamics processes of removing main nutrient TP by Lolium multiflorum showed that it accords with cubic curve.

对其去除水体总磷的动态过程拟合表明符合三次方程曲线。

Combining chemical complexation and physics extraction of monobasic and polybasic carboxylic acid, the universal liquid-liquid equilibrium model with clear physical meaning was successfully induced.

详细研究了萃取剂浓度、稀释剂浓度、水相pH值、温度和羧酸初始浓度等因素对络合萃取平衡的影响以及萃取剂的再生条件。

A new fluorescence quenched method has been found for determination of trace of gold based on the formation of nonfluorescent ternary complex Au- TBT -APDC.The composition ratio of Au to ligandi is 1:2:2.Under the optimum conditions,the linear range of the calibration curve is from 0 to 160ng Au/ml.

本文研究了在聚乙烯醇存在下,金与曙红、吡咯啶二硫代氨基甲酸形成三元络合物的合宜条件,并据此建立了水相荧光熄灭测定痕量金的新方法。

Methods used in other high-performance liquid chromatography for determination of active ingredients, octadecyl silane for the bonded silica filler; methanol - water (55:45) as mobile phase, detection at 254nm.

采用高效液相色谱法对方中有效成分进行含量测定,用十八烷基硅烷键合硅胶为填充剂;甲醇-水(55:45)为流动相,检测波长为254nm。

Nanosize SiO_(2) particles were prepared using water-in-oil microemulsion method in polyether polyol with hydrolysis and condensation reactions of tetraethyl orthosilicate by means of controlling molar ratio of water to surfactant and selecting moderate hydrolysis temperature.

选择适当的乳化剂和水解温度以及控制水与乳化剂的摩尔比,采用W/O型微乳液法在聚醚多元醇中通过正硅酸乙酯的水解、缩合反应合成了纳米SiO2。

The coprecipitation is based on the formation of water-insoluble inner complex compounds of the trace elements with-SH group-containing reagent and the formation of disulphide directly in the solution owing to the easy oxidizability of the-SH group. During the formation of the solid disulphide phase the trace elements are coprecipitated.

痕量元素和含-SH基团的试剂形成不溶於水的螯合物,由於-SH基团易被氧化从而直接在溶液中形成固相二硫化物,同时将溶液中的痕量元素共沉淀下来。

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This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

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