羧基的

The hybrid density functional theory is used to study formation of the junction of alkanemonothiol molecules with different terminal groups. The relationship between geometric structures of the molecular junction and the external force is obtained.

利用杂化密度泛函理论，研究了以甲基、醇基、羧基为末端基团的烷烃硫醇分子与金电极形成分子结的过程，得到了分子结的几何结构与外加压力的关系。

The results showed that the biological activities are closely related to the steric conformation and distribution of electrostatic potential of carboxyl group: The coplanatity between the group of C-3 position and the parent nucleus and the coplanatity between the group of C-3 position and C-4 keto group are very important for biological activities.

结果发现该类药物的抗菌活性与C 3位的空间构象和静电势分布有着紧密的联系。C-3位羧基与C-4位酮基共面性、以及它和母核共面性对抗菌活性十分重要，C-3位两个氧原子周围较强的负静电势也是影响活性的重要因素。

PartⅡ: N-phosphoryl amino acids have many biomimic reactions and the co-participation of the three functional group of phosphoryl, carboxyl and theamino acids side chain are essential for these reactions to occur. To study themechanism and the intrinsic relationship of these three groups will enlight thestudy on the mechanism of enzymatic reaction, the origin of life and otherproblems in the life science.

第二部分：N-磷酰氨基酸的多种仿生化反应是磷酰基、羧基、和侧链基团协同作用的结果，对其反应机理的研究，将对生化反应和生命起源中磷的作用有着重要的意义。

Synthesis of pyruvic acid from lactic acid by catalytic oxidation with oxygen was studied. The effect of catalyst composition, amount of catalyst and oxygen, reaction temperature and time on product yield was investigated and the optimum conditions were found.

由于丙酮酸的分子中同时具有羰基和羧基两个官能团，因而反应中心多而显出比一般化合物更为重要和特殊的化学性质，已引起越来越多的化学工作者的重视。

The homology is extensive throughout the protein and all amino acid residues of Pdc that have been shown to be involved in ThDP binding, both of the thiazole and phosphate moieties, are precisely conserved in Thi3p.

整个蛋白具有广泛的同源性，并且丙酮酸脱羧酶的氨基酸残基，已被证明参与了ThDP结合，双方的噻唑和磷酸基，都精确的保存在Thi3p中。

In this paper, the effect of modifying procedure of the GC electrode on the electrode reaction kinetics of benzoquinone and the modified mechanism of enzyme electrode havebeen studied.

玻碳电极经电化学氧化处理，可提高苯醒电子中继物电极反应的可逆性，其原因在于电极表面氧化生成的羧基与醌基之间形成氢键，提高了电极表面电子冲继物的浓度，降低了异相电荷传递的活化

The exo-cyclic tin atoms are five-coordinate and have coordination geometry of monocapped trigonal bipyramid with very similarly distorted mode.

有关该类化合物的晶体结构研究表明，中心锡原子的配位形式决定于直接与锡原子相连的烃基的结构和羧酸基配体的类型[8～ 10 ] 。

The structure of these hydrogels is characterized by pH- and electric field-sensitive moieties, azobenzene cross-linking groups cleavable by cecal bacteria and hydrophobic side-chains which may control the swelling properties of hydrogels by adjusting their lengths.

该凝胶的结构特点是：兼备pH、电场双重敏感的特征基团即羧基；含有可被盲肠菌分解的偶氮苯交联基团；带有可控制凝胶溶胀性能的疏水侧基。

Some of the recent results are summarized on the characteristics of HYP and its effect on the wet-end operations of the papermaking process in the production of printing and writing paper, including internal sizing and f iller retention.

与漂白硫酸盐浆相比，高得率浆含有较多的细小纤维、木素和阴离子垃圾，同时含有较多的羧基和磺酸基等阴离子基团而使其纤维上的负电荷密度显著高于BKP纤维。

Macrocycle with two aryl oxdiazolesThe structure of this type of macrocyclic compounds with two aryloxdiazoles attached to the nitrogen atom of amino acids is different fromthat of the above compounds.

三。含双噁二唑的大环：在这类分子中两个芳基噁二唑通过氨基酸的氮原子连接成环，而将手性中心和羧基端放于环外，这可提高分子的络合性能。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。