查询词典 active center

Because〓 supported on silica is soluble inmethanol, active center of supported 〓 catalyst is able to elapse. The saltsin which ion semidiameter are larger, are ideal solid acidic catalyst, because of theirhigher activities, insolublilities in methanol.

离子半径较大的负载型磷钨酸盐除具有较高活性外，由于不易溶于极性溶剂，因而催化剂活性稳定性强，是一种理想的固体酸醚化催化剂。

The prediction of protein structure showed that lumbrokinase F238 had serine active center.

与相似性最高的序列F-Ⅲ-2比存在2个碱基的差异，导致2个氨基酸的不同。

Forms a thioether bond with the sulfhydryl group in the active center of the enzyme.

与酶活性中心的巯基形成硫醚键。

Dust may be an active center during the corrosion of contact surface.

所以，尘土在电接触表面的腐蚀过程中，起了一个"加速腐蚀"的作用。

Thenard(1811), the discoverer of hydrogen peroxide, expected that its degradation in living tissue is performed by a special substance, which Schonbein (1863) identified as a certain kind of 'ferment'. Loew (1901) was the first who named this H2O2-degrading enzyme catalase, but it took further 22 years until Warburg (1923) demonstrated that the active center of catalase contains iron, as concluded from the characteristic inhibition with cyanide.

过氧化氢的发现者Thenard ，希望活体组织中过氧化氢的降解是由一种特殊物质引起的，Schonbein定义这种特殊物质为某种酵种，Loew是第一个定义为过氧化氢降解酶，22年后Warburg 证明过氧化氢酶的活性中心含有Fe，正如从已知氰化物的特性得到结论。1927年，WIeland提出了一个简单的细胞过中氧化氢酶的解释。

The results show that the possible reasons of the catalyst deactivation are as follows : the suspended substances such as slightly soluble dyes in the wastewater and uncrystallized c produced in the potocatalytic reaction are adsorped on the surface of TiO2 ;some inorganic ions occupy the active center of photocatalyst, or precipitate on its surface ;the supported quantity of TiO2 decreases with long time use and repeated washing.

实验结果说明，催化剂活性下降的主要原因有：废水中不溶于水的染料等悬浮物和催化反应中产生的无定形碳在催化剂表面的吸附；高含量的无机离子对催化剂活性位的占据或在表面的沉积；长时间的使用和反复冲洗使TiO2负载量减少。

So, we can study and estimate the antioxidant capabilities of every kinds of alimental organism quantitatively through their distribution of the biopolymer active center elements.

由此我们就可以通过食疗型生物体生物高分子活性中心元素分布来定量的了解各种生物营养体的抗氧化能力，把群子统计参数作为判断抗氧化能力大小的标度之一，通过群子统计参数对其抗氧化性进行评价。

Biopolymer active center elements are the composition of the alimental organism and the primary inherent cause of catalysis and activation, their ingestion, accumulation, transportation and distribution have relation to the biological function of the organism, so we can predict the characteristics of the elemental distribution by the fourth statistical mechanics founded by Professor Jin and further study the biological function of the organism with diet therapy effect.

由于生物高分子活性中心元素是生物营养体的组成成分与催化激活的主要内在原因，其摄入，积累，运送与分布都与生物体的生物功能密切相关，所以可以通过金日光教授提出的第四统计力学——群子统计理论来考察其分布规律，进而考察、评价食疗型生物体的生物功能，从而为研究生物体的营养、药物功能提供新的理论依据，为诠释中国传统食疗学的相关理论打开新的思路。

The polar hydrophilous amino acid Thr is replaced by an unpolar hydrophobous amino acid Ile, a hydrogen bond changed in the higher structure and the point is far away from the active center, so it doesn't influence the activity and thermostability a lot.

亲水的Thr108突变成非极性的Met，导致与该位点空间相邻的N116亲水氨基酸His的极性残基——咪唑环产生空间电位排斥，从而造成His所在的β折叠构象发生改变。

We proposed that the high dispersed and nanosized extra-framework Fe〓O〓 in the zeolitic channel may be the active center of N〓O.

提出在该反应中，N〓O的吸附和活化中心可能是位于ZSM-5分子筛孔道内、高分散的Fe〓O〓。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐