羧基

It is the first time to synthesize of 2, 4-dihydroxybenzic acid using new spray process.

首次将喷雾反应器及技术应用在二氧化碳与间苯二酚连续羧基化，合成2，4-二羟基苯甲酸。

As CAAX-mimetics, 1, 3-dihydro-5-phenyl-2-H-1, 4-benzodiazepin-2-one was modified by linking carboxyl groups with various carbon through N-1 and C-3, 3-(imidazol-4-yl) propion amido group with different substituents was connected at C-7; In the synthesis of bisubstrate analogues, thiocarbamido compounds was alkylated by alkyl iodide and then hydrolyzed to give alkylthiol benzoate compounds.

1，4-苯并二氮杂草-2-酮类化合物的合成过程中分别对其1、3、4和7位进行了基团变化，在1和3位连接不同长度含羧基或酯基的侧链，在7位连接不同取代的咪唑丙酰氨基。在苯甲酸硫醇酯化合物合成过程中，建立了一种硫原子连有不同长度碳链的苯甲酸硫醇酯的合成方法。

The deduced peptide consists of 80 residues with a molecular mass of 7.6 kDa. It contains 17 cysteineresidues (21 mol%), out of which 8 are clustered in the amino-terminal domain of 23 residues, and 9 are clustered in the carboxy-terminal domain of 20 residues. The intermediated region contains 37 non-Cys residues.

它编码一个含80个氨基酸、分子量为7.6 kDa的蛋白质，Cys残基有17个，占21%；其中8个Cys分布在氨基端23个氨基酸组成的结构域内，9个分布在羧基端20个氨基酸组成的结构域内，中间是一段由37个氨基酸组成的非Cys区。

In this thesis, a series of uliphatic polyester anhydrides 〓COCH〓CH〓COO 〓OCOCH〓CH〓COO〓 and copolyanhydrides with 1, 3-bis (4-carboxylphenyloxy) propane were prepared.

本文中合成了一系列脂肪族聚酯酸酐〓以及与1，3-双（4-羧基苯氧基）丙烷的共聚物，研究了它们的降解性能和药物释放性能。

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。

In addition to the amino and carboxyl groups possessed by all amino acids, the R group of some amino acids can ionize.

另外，所有的氨基酸都拥有氨基和羧基，一些氨基酸的R基能电离二元酸能形成酸式盐。

It is noteworthy that there are a lot of hydrogen bond interactions between carboxy groups and water molecules and weak C-H…S hydrogen bonds between the 1,3-dithiocyclohexyls of two adjacent DYM ligans.

另外，在此配位聚合物中，羧基氧、配位水分子氧和晶格水分子氧之间存在大量氢键相互作用，而且，相邻 DYM 配体的 1，3-二硫环已基之间存在弱的 C-H…S 氢键相互作用。

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。

The principal component of water-soluble acids is the saturated aliphatic diacids of C〓 to C〓 and the saturated aliphatic monoacids of C〓 to C〓; and the water-insoluble acids are organic macromolecular compounds containing a large amount of carbonyl, carboxyl structures and aromatic group.

水溶酸的成分以C〓~C〓的饱和二元脂肪酸和C〓~C〓的饱和一元脂肪酸为主；水不溶酸是含有大量羰基、羧基结构和芳环的有机大分子化合物，其结构非常接近腐植酸。

The structures of PAM and its hydrolysate were characterizated with FTIR and ~(1)H NMR.

研究了二醛交联的聚丙烯酰胺及其水解产物对水、肥的吸收及保持能力，结果表明，聚丙烯酰胺水解交联后，部分胺基转化为羧基和羟基。

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。