催化的

The kinetics of PenG hydrolysis catalyzed by penicillin amidase entrapped in the reversed micelles was studied.

研究了青霉素酰化酶在AOT/异辛烷反胶团体系中催化PenG水解反应的动力学。

Then Doripenem came into the market in the July ,2005. We studied the synthesis of Doripemen.Firstly, we synthesized the chemical 2 from the starting material------o-hydroxylphenylacylamine through Reformastky reaction, alkylation, Diekmann reaction, enolization, esterification and etc. Secondly, we synthesized the chemical 3 from L — hydroxylproline through the protection of carboxyl, amidogen and hydroxyl group, reduction by NaBr, SN_2 substitution and Mitsumobu reaction.

我们以水杨酰胺为起始原料，经Reformatsky反应、烷基化、Diekmann环合、烯醇化、酯化等反应合成双环母核2；再从L-羟基脯氨酸出发，经酯化保护羧基、保护氨基、保护羟基、硼氢化还原酯得醇、Sn2取代和Mitsumobu反应等合成巯基侧链3；最后由化合物3经脱保护、水解得硫醇，和化合物2在二异丙基乙基胺的作用下缩合，最后Pd／C催化脱保护，历经16步反应最终得到产物多尼培南。

In reductive amination, how to avoid to turn ketones into alcohols is one of difficulties in industrialized manufacturing.

在还原胺化类催化加氢反应中，如何避免酮被还原成醇，也是工业化生产中面临的难题之一。

Catalytic amination of alcohols was systematically discussed and reviewed.

对醇的催化胺化反应进行了系统讨论和综述。

A new method has been studied that the trace Pd in ammine medium catalyzes the discoloring reaction between indigo carmine and potassium periodate.

发现痕量钯在氨性介质中能催化高碘酸钾与能红之间的褪色反应，研究了反应最优化条件和动力学参数。

The effect of pore structure in the anode catalyst layer on the performance of direct methanol fuel cell was investigated using ammonium carbonate as a pore former .

采用碳酸铵作为造孔剂，研究了阳极催化层孔结构对直接甲醇燃料电池性能的影响。

It was found that high reclaiming cost was required for the process catalyzed by sulfuric acid or ammonium hydroxide, and the process of PET hydrolysis at high temperature showed profitable.

此外，以氢氧化铵或以硫酸催化程序中必须消耗多量硫酸，及产生石膏或硫酸铵废弃物，因而所需的操作费用较高。

Methods:The glucose hydrolyzed from starch by amylopsin catalysis was determined by iodimetry.

利用胰淀粉酶催化淀粉水解，用碘量法测定水解产物葡萄糖的量以测定酶活力。

The influence of solvent on the homogeneous hydrogenation of maleic anhydride is obvious.

溶剂对顺酐加氢催化活性有着很大的影响。

In this article, Fe3-Al3 was first used to catalyze copolymerization of maleic anhydride and isoprene.

研究了双金属体系Fe3-Al3催化马来酸酐与异戊二烯的共聚反应。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。