羟基酸

The sodium lignosulfonate with low molecular weight which has more hydroxyl groups and sulfonic groups, less methoxyl groups, has better corrosion and scale inhibition performances.

研究表明，分子量较小的木素磺酸钠级份含有较多的羟基和磺酸根、较少的甲氧基，具有较好的缓蚀阻垢性能。

Firstly, 3-hydroxy-2-naphthoylchloride was prepared by 3-hydroxy-2- naphthoic acid and SOCl2, with the optimal process conditions studied.

首先，以2，3-酸和SOCl2为原料合成了3-羟基-2-萘甲酰氯，并确定其最佳工艺条件。

The Polyether Polyurethane elastomer were prepared from hydroxyle-terminated polybutadiene, isophorone diisocyanate, 1,4-butylcne glycol, stannous octoate and SiO_2 in direction.

以端羟基聚丁二烯、异佛尔酮二异氰酸酯、1，4-丁二醇、白碳黑、辛酸亚锡等为原料，采用一步法制备了聚烯烃型聚氨酯弹性体材料。

Based on the principle of Hunter reagant,N-Hydroxysuccinimide functional group was introduced into polymer carrier to synthesize a couple of olefine acids" and styrene" copolymer-NHS-esters.

利用Hunter试剂的原理，将N-羟基琥珀酰亚胺酯功能基团引入高分子载体上，合成了几种烯酸与苯乙烯聚合物的NHS酯。

Investigated the organic surface modification of anatase titanium dioxide pigment and its adsorption mode. It was founded that the surface hydroxyl groups are the active centers for olefinic acid. The adsorption of modifier fit Langmuir single molecule layer adsorption mode.

研究了锐钛型钛白的有机表面改性及表面吸附模型，认为表面羟基是有机烯酸表面改性的活性中心，改性剂在钛白表面的吸附符合Langmuir单分子层吸附模型。

RESULTS: A new methyl orsellinate glycoside, methyl 2-hydroxy-6-methyl benzoate 4-O-β-D-glucopyranoside (1) and a known methyl orsellinate (2) were isolated from this plant.

结果：从樱草杜鹃中分离得到1个新化合物，鉴定为2-羟基－6-甲基苯甲酸甲酯4-O-β-D-葡萄糖苷(1)，及苔色酸甲酯(2)。

By using gas chromatography technique nine kinds of fragrance components(acetic aldehyde,ethyl acetate,ethanol,propyl acetate,3-hydroxy-2-butanone,acetic acid,furfural,metacetonic acid,2,3-butylene glycol)were measured quantitatively in different kinds of Shanxi overmature vinegar and the other kinds of vinegar.

应用气相色谱方法对山西老陈醋和其他种类醋的9种香气成分(乙醛、乙酸乙酯、乙醇、乙酸丙酯、3-羟基-2-丁酮、乙酸、糖醛、丙酸、2，3-丁二醇)进行了定性、定量测定，并用聚类分析、模糊综合评判、方差分析、回归分析的方法对实验结果进行了数理分析。

Several types of ligand reactions observed under hydrothermal condition were summed up:(1) hydrolysis of pyridine nitrile, aldehyde and ester in mixed water and alcohol into pyridine-carboxylate;(2) replacement of carboxylate group with sulfonic group;(3) coupling of phenanthroline by dehydrogen;(4) oxidative coupling of methanol into oxalic acid;(5) hydroxylation of isophthalate.

总结了以往在水热条件下观察到的几类配体反应：（1）吡啶腈、醛和酯在醇和水混合溶液中水解成吡啶羧酸；（2）磺基取代羧基反应；（3）邻菲啰啉的脱氢的聚合：（4）甲醇被氧化偶合生成草酸：（5）间苯二甲酸的羟基化反应。

This thesis is constituted by four parts: In the first part a summarization is given on the main total synthetic methods of isoflavones, for example, deoxybenzoin method which generally involves two steps wherein a phenol is reacted in the presence of a Lewis acid with phenylacetic acid to generate an intermediate deoxybenzoin which is then cyclized with a one carbon electrophile.

本论文主要工作包括四部分：第一章综述了近年来全合成异黄酮的主要方法：脱氧安息香法，是以多羟基苯酚与苯乙酸或苯乙腈在Lewis酸存在下，反应生成中间体脱氧安息香，然后再与亲电碳试剂进行关环反应生成异黄酮。

In Chapter 3, the separation of Fe〓, Co〓, Ni〓, Zn〓, Cu〓 by CE in the presence of imidazole or phenylamine as UV-absorbing background electrolyte and α-hydroxybutyric acid as the complexing agent with indirect UV absorbance was investigated.

在第三章，研究了以咪唑或苯甲胺为背景吸收电解质，α-羟基异丁酸为络合剂，采用毛细管离子电泳间接紫外法测定了镍矿石中Ni，Co，Cu的含量。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。