酸基

Objectives and methods: The present study is undertaken to examine our hypothesis that with the accumulation of ion channels, increased sialic acids at the injury site or DRG somata result in a reduction of net transmembrane potential that evoke ESD in injured neurons.

膜蛋白的一个共同特性是其膜外域接受密集的糖基化，糖基含有大量带负电的唾液酸，如大部分离子通道，特别是电压依赖性的钠通道含有大量的唾液酸，而且这些负电荷靠近钠通道的电压感受器而易化通道开放。

Methods 2-(piperazin-1-yl)-1-(pyrrolidin-1-yl)ethanone (2) was synthesized from pyrrolidine via amidation and substitution, followed by treating with chloroacetyl chloride and triphenylphosphine in a "one pot" manner to give the corresponding phosphonium chloride 3 in a stable and pure form after crystallization from isopropanol.

以四氢吡咯为原料，先与氯乙酰氯成酰胺，再与哌嗪发生取代反应制得中间体［（1-四氢吡咯基）甲基］哌嗪(2)；化合物2与氯乙酰氯和三苯基膦反应，经异丙醇重结晶得到稳定的有机鏻盐(3)；化合物3与3，4，5-三甲氧基苯甲醛发生Wittig反应，再与马来酸成盐得目标化合物马来酸桂哌齐特(1)。

An approximately linear relation is obtained between the value of at the maximun of the CD band around 250 nm and the number of ionized tyrosyl residues. Obviously the band is attributed to the ionized tyrosin.

在碱性条件下，于250nm附近出现一新的CD带，它的强度与离解的酪氨酸残基个数呈线性关系，说明这一新带主要是由离解的酪氨酸残基产生的。

Mass spectroscopy is so sensitive, though, that it can tell the difference between a nitrated and an un-nitrated peptide.

质谱的灵敏度能够确保把硝基缩氨酸和非硝基缩氨酸分辨出来。

American Heart Association has come to tea is "rich in eliminating free radicals, with the role of acid and flavonoids, one of the drinks, can reduce the incidence of myocardial infarction," the conclusions of the results of their research show that a particular cup of tea free radicals, the even more garlic, broccoli, carrots, cabbage can play a small role of acid-fast.

美国心脏学会曾经得出红茶是&富含能消除自由基，具有抗酸化作用的黄酮类化合物的饮料之一，能够使心肌梗塞的发病率降低&的结论，其研究成果表明，一杯红茶对特定的自由基来说，甚至比大蒜、西兰花、胡萝卜、小卷心菜更能发挥抗酸化作用。

Comb-shaped polycarboxylic -type superplasticizers were synthesized with acrylic acid,mathacrylic acid,sodium allylsulphonateand methoxypolymethacrylatethrough aqueous copolymerization initiated by ammonium persulfate.

将甲氧基聚氧乙烯醚单甲基丙烯酸酯、丙烯酸、甲基丙烯酸和烯丙基磺酸钠进行水溶液共聚，合成了具有梳型结构的聚羧酸系高效减水剂。

In the reduction of 1, 6-diphenyl-1, 6-hexanedione catalyzed by the bis-squaryl proline, good enantioselectivities were obtained, the ee values were up to 90%.We also studied the asymmetric borane reduction of prochiral ketone catalyzed by a series of thiazolidine ligands.

本文考察了由L-半胱氨酸衍生的2-位无取代基的以及2-位芳基取代的噻唑烷酸及醇配体在前手性酮的不对称还原反应中的催化性能。

To assess which Ser/Thr residue could act as a phosphate acceptor upon agonist stimulation, truncation mutants of DORs were constructed by removing the last 15 ( D 15) or 31 ( D 31) residues containing the last three or six potential phosphorylation sites from the C-terminus of the wild-type receptor.

为了研究激动剂诱导下DOR的磷酸化发生于哪一个位点，我们首先构建了C末端区缺失六个丝/苏氨酸残基及三个丝/苏氨酸残基的DOR突变体 D 31和 D 15。

This paper determined Li+ content of LiFePO4/C composite by air-acetylene flame atomic Absorption spectrum method,recovery rate of standard series sample with Fe2+ and PO3-4 and without Fe2+ and PO3-4 were determinated.

采用空气-乙炔火焰原子吸收法测定了LiFePO4/C复合物中的锂含量，考察了不加基体和加入基体的两种标准系列的回收率；因为目前还没有LiFePO4的标准样品和标准分析方法，所以实验采用模拟标准样品考察了不同酸介质和不同酸用量的影响，并进行了Fe2+、PO34-、Cr3+、Mg2+、Mn2+、Co2+、Ni2+离子对测定锂的干扰实验。

AIM To investigate whether the human pro- lidase possesses the G-type organophosphate hydrolyzing enzyme activity besides its ability to catalyze the hydrolysis of the dipeptides bearing a proline residue at the C-terminus.

目的研究人氨酰基脯氨酸二肽酶除催化水解C端为脯氨酸残基的二肽外，是否还有G类有机磷化合物水解酶活性。

By using competitive adsorption of activated carbom to remove unfavorable influence of carbon in carbonaceous gold concentrate on leaching process, the leaching rate of gold concentrate can be improved to 88% as compared with 10%by direct cyanidation.

本文论述了利用活性炭竞争吸附作用，消除含炭金精矿中炭在浸出过程中的影响，使金精矿的浸出率可由直接氰化的10％提高到88％。

The only thing you're ever gonna be king of is King of the Stupids!

你只配做傻瓜的国王！