苄基

The photodegradation of dibenzyl sulfone catalyzed by semiconductor TiO2 particles under UV irradiation was investigated.

以半导体TiO2为催化剂，对二苄基砜（ASO2A）进行光催化降解，研究降解二苄基砜的反应条件，讨论了TiO2为催化剂降解ASO2A的实质，初步确定反应机理。

The second synthetic strategy commenced from butane-1,4-diol 50, which underwent monobenzylation, Swern oxidation, enolization followed by acetylation and debenzylation to yield an intermediate 46 in an overall yield of 54% in a 4-step procedure.

第二条路线从1，4-丁二醇50开始，这个化合物经过单苄基化、Swern氧化、烯醇化随后乙酰化和脱苄基化共4步反应得到中间体46，总产率54％。

The flotation behavior and mechanism of benzyl malonic acid collector with combination use of hydroximic acid were studied by single mineral tests. The results showed that the recovery of minerals increased by combined use of benzyl malonic acid and hydroximic acid.

通过单矿物试验研究了苄基丙二酸与羟肟酸类捕收剂组合使用时对赤铁矿和菱锌矿的捕收性能，结果表明：苄基丙二酸与羟肟酸组合使用能明显提高矿物的回收率，提高浮选效率。

Some useful fluorine-containing intermedi-ates were synthesized by the reaction of activated methylenecompounds or silyl enol ether with 2,2-dihydropolyfluoro-alkanoates or 2-hydropolyfluoroalk-2-enoates in the presenceof different bases.

进一步研究表明，在氢化钠的作用下，苯乙腈，苄基苯基甲酮也可以与2-氢多氟-2-烯酸乙酯发生亲核加成反应，苄基苯基甲酮的加成中间体经多聚磷酸环化，得到了间位氟烷基取代的α-萘酚衍生物。

An unusual substitution of 5-fluorouracils by the reaction of lithium salts of 1,3-dialkyl-5-fluorouracil with benzyl bromide is described.

1，3-二烷基-5-氟尿嘧啶的锂盐与苄基溴进行苄基化反应时产生了异常的反应结果。

The prepared pentabromo benzyl bromide may be applied in preparing high efficiency fire retardant.

制备的五溴苄基溴可用于制备五溴苄基丙烯酸酯或烷基醚类聚合物用高效阻燃剂。

Reaction of L-tyrosine with benzyl bromide in the presence of copper sulfate led to the protection of phenol group on the side chain of L-tyrosine to give H-Tyr-OH in 45% yield via a copper complex intermediate.

酪氨酸与溴化苄在硫酸铜存在下反应，选择性地在其侧链酚羟基上引入苄基保护基，通过反应条件的优化，反应产率达到45%。

The electrochemical behavior was studied at different electrodes by cyclic voltammetry, which showed significant electrocatalytic effect of the silver electrode on the reduction of benzyl chloride.

通过循环伏安法研究了苄基氯在不同电极上的电化学行为，结果表明了银电极对苄基氯的还原具有很强的电催化效果。

Second,α,β-unsaturated nitriles were synthesized by three kinds of methods., all the reactions of N-methylhydroxylamine, O-methylhydroxylamine, N-benzylhydroxylamine and O-benzylhydroxylamine withα,β-unsaturated nitriles were carried out, under different temperatures and different solvents. But no desired products were found, though some catalysis were also added.

在不同温度、不同溶剂的条件下，用所合成的α，β-不饱和腈与N-甲基羟胺、N-苄基羟胺、O-甲基羟胺和O-苄基羟胺分别进行反应，没有得到期望的产物，尝试加入了一些催化剂，也没有得到产物。

The results show that methyl group strengthens the electrostatic attractions, but reduces the H-bonds effect, while benzyl group can make both electrostatic and H-bond effects strong. The theoretical results are identical with the results of the collectors flotation tests. Collecting ability of the quaternary amine salts is better than that of dodecylamine and dodecyl bimethyl amine. The quaternary amine salt containing benzyl group performs best, and it is little affected by pH value. Substitution of N-containing polar group in amine collectors can impact the aluminosulicate minerals flotation.

研究结果表明：甲基的取代可增强阳离子的静电作用能力，同时，削弱它与矿物表面之间的氢键作用；苄基的取代不仅增强药剂的静电效应，而且增加氢键的结合能力；理论分析结果与浮选试验结果一致，季铵盐的浮选能力较伯胺与叔胺的强，连有苄基的季铵盐对铝硅酸盐矿物的捕收能力最强，且受pH值影响小。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。