酸基

And they have been used in composites, adhesives, and electrics. However, like most other thermosets, they have suffered the drawback of brittleness. At the same time, reports on cyanate esters are all focused on bisphenol A dicyanate ester.

但像其它的热固性树脂一样，氰酸酯树脂普遍存在脆的弱点，限制了其应用，同时，目前关于这类性能优异的树脂基体的研究都集中在双酚A型氰酸酯树脂上。

The Nterminal cyclization of peptides, as one of a variety of modification introduced in sample preparation, has been preliminarily studied in this work.

目前，肽段鉴定时常用的添加残基修饰有甲硫氨酸的氧化和半胱氨酸的氨乙酰化，而对其它修饰研究很少。

Hydroxyl octanoic acid(1) was synthesized from heptaldehyde by a four-step reaction of nucleophilic substitution,displacement reaction,acid hydrolysis and deaminization.

以正庚醛为原料，经过亲核取代、置换反应、酸水解及碱化脱氨等4步反应合成了制备3，6-二己基-1，4-二氧杂-2，5-二酮的中间体——α-羟基辛酸(1)；1经对甲苯磺酸催化脱水得辛交酯。

Agmatine is a primary amine formed by the decarboxylation of L- Arginine by the enzyme L-arginine decarboxylase ...

胍丁胺是精氨酸在左旋精氨酸脱羧酶催化下脱羧基的产物，是咪唑啉受体的内源性配体。

The waste acid was recovered from the raffinate with the active carbon as the decolorant at room temperature .

以正辛醇为萃取剂，通过三级萃取处理硝基C酸废水，萃余水相经过活性炭室温下脱色回收废酸。

The structure of Glycyrrhizin contains two parts: 18 beta glycyrrhetinic acid and disaccharide acid.

本论文就甘草次酸进行化学修饰，与胺基酸作偶合反应。

In this study we use the oligomers of amino ethylene series as matrix and introduce dithiocarbamate group to adsorb merely heavy metal ions. Because of its special structural characteristics , dithiocarbamate can combine with a great number of heavy metal ions to produce insoluble complex compound except for alkali metals and alkaline earth metals.

本研究系将氨基乙烯系列之寡聚物(oligomers of amino ethylene series)当做基质引入只对重金属离子具有特殊螯合能力之荒酸盐，除了与碱金属及碱土族外荒酸盐与其他重金属离子都能形成不溶性错合物。

A rapid capillary electrophoresismethod has been developed for the determination of eleven bioactive flavonoids in bee propolis:acacetin,apigenin,cinnamic acid,galangin,ferulic acid,hesperidin,luteolin,naringenin,quercetin,resveratrol,and rutin.

使用毛细管电泳法检测蜂胶中11种黄酮类化合物：金合欢素、芹菜配基、兰肉桂酸、黄良姜精、阿魏酸、橙皮甙、毛地黄黄酮、柑桔黄素、槲皮素、白藜芦醇、芦丁。

Our country ethylene diamine mainly uses in producing the agricultural chemicals (woods manganese zinc, dithane Z-78, generation of woods amine and pesticide, weed killer, disinfectant), the surface active agent (lives geminate stearic acid amide, alkyl imidazole lin, double amide, with oxirane, epoxypropane synthesizes non-ionic surface active agent), the epoxy resin firming agent (polyamide resins, epoxy firming agent, hydroxyethyl ethylene diamine and so on), the wash assistant (ethylene diamine four ethanoic acid and sodium salt series chelating agents), medicine raw material (aminophylline, washes must be peaceful, nose eye only, deinsectization spirit and so on), water treatment medicinal preparation (ethylene diamine four methylene phosphonates, second grade trunk base ethylidene two phosphine acids), corrosion inhibitor dye fixing agent, photography materialFixing bath and oil dope and so on.

我国乙二胺主要用于生产农药（森锰锌、代森锌、代森胺及杀虫剂、除草剂、杀菌剂），表面活性剂（生成双硬脂酸酰胺，烷基咪唑啉、双酰胺，与环氧乙烷，环氧丙烷合成非离子表面活性剂），环氧树脂固化剂（聚酰胺树脂，环氧固化剂，羟乙基乙二胺等），洗涤助剂（乙二胺四乙酸及其钠盐系列螯合剂），医药原料（氨茶碱，洗必泰，鼻眼净，灭虫灵等），水处理剂（乙二胺四甲叉膦酸盐，乙脒基乙叉二膦酸），缓蚀剂染料固色剂，照相材料定影液及润滑油添加剂等。

According to the result of experiment, 0.5% sodium hyaluronate was chosen as gel base to select the enhancers. By the result of rheology, the sodium hyaluronate gel possess the property like pseudoplastic fluid, and viscosity was high/low in low-frequency/high-frequency, which was propitious to spreading and glutinousness.

在处方前研究工作的基础上，以药物体外经皮累积渗透量为指标，考察了HPMC和玻璃酸钠对药物体外经皮渗透的影响，根据实验结果选用0.5％玻璃酸钠为凝胶基质进行促渗剂的筛选。

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。