酸基

NAC also blocked the up-regulation of TGF-β in in vivo model of VILI. Conclusion TGF-β1 and TGF-β2 were up-regulated in VILI. Oxidant injury mediated up-regulation of TGF-β in VILI. NAC, which attenuated oxidant injury and blocked TGF-β up-regulation in VILI, could be a future therapeutic strategy in VILI.

结论TGF-β1和TGF-β2在通气机所致肺损伤中的表达增加并在血清中上调；TGF-β上调的机制与氧自由基损伤有关但与肿瘤坏死因子无关；N-乙酰半胱氨酸可对抗氧自由基损伤，能阻断TGF-β的上调，可能成为呼吸机相关肺损伤的一种新治疗途径。

Bezaldehyde was used as protective agent in first method.S-Epichloeohydrin was aminated and acidulated to give(2S)-1-Amino-3-chloro-propanol Salts.The acetylation of (2S)-1-Amino-3-chloro-propanol by acetic anhydride produced the intermediate-N-[2--3-chloropropyl]acetamide.And then at 20℃,in the presence of lithium tert-butoxide,benzyl 3-fluoro-4-morpholinophenyl carbamate react with-N-[2--3-chloropropyl]acetamide to give linezolid in total yield of 43.6%.

路线一采用苯甲醛作保护剂，使S-环氧氯丙烷氨解、酸化生成S-1-氨基-3-氯-2-丙醇盐酸盐，然后经乙酰化反应后，生成中间体-N-[2-乙酰氧基-3-氯丙基]乙酰胺，再用N-(3-氟-4-吗啉苯基)氨基甲酸苄酯和中间体在催化剂叔丁醇锂存在下25℃反应生成利奈唑酮，总产率达到43.6%。

Chemical elements and their compounds, excluding the hydrocarbons and their derivatives (except carbides, carbonates, cyanides, cyanates and carbon disulfide).

不含除碳化物，碳酸盐，氰化物，氰酸盐及二硫化碳外的烃基及烃基衍生物的化学元素及其化合物。

The shorter variant mHemk2 is 1696 bp in length encoding a putative mouse protein of 14.7 kDa, consisting of 138 amino acid residues.In protein data bank annotations, Hemk has previously been classed among methyltransferases methylating N6-adenine or N4-cytidine in DNA because of the presence of S-adenosyl-L-methionine binding motif and of an NPPY motif in the protein.

在蛋白数据库的注释中，由于在Hemk蛋白中存在S-腺苷-L-甲硫氨酸结合基序和一个NPPY基序，因此，在蛋白库的说明中已经将Hemk蛋白归类于能甲基化DNA中N6-腺嘌呤或N4-胞嘧啶的甲基转移酶。

The 3,4-dimethoxybenzene was nitrated by mixed acid of HNO3-H2SO4 under the reaction temperature of 0~5℃. 3,4-dimethoxynitroben-zene was obtained by filtration, and its yield reached over 97%.

在0~5℃低温条件下，以硝酸和硫酸按比例配成的混酸进行硝化，反应结束后过滤得到3，4-二甲氧基硝基苯，该步反应的收率有97%。

Top sintering material preheats for a short time、sinter at lower temperature、cools too fast and has low crystallinity, especially, network SFCA offorms difficultly in the top layer, that results in high ratio of pore, so the strength of top sinter is low. when thickness of sintering material is increased, the ratio of top sinter will be decreased, in its entirety, the strength of sinter will rise.

5烧结矿破碎属脆性断裂，一般在单轴压缩应力下受剪切产生，本文基于低氟烧结矿物质组成，导出了基体抗压强度与烧结矿物质组成的关系式，由此得出，基体抗压强度受磁铁矿影响不大，而受铁酸钙影响较为显著。

This is a special reaction of arginine's carbamidine, which is useful in quantitating and determining the natures of protein and the amino acid.

这是由于蛋白质分子中精氨酸胍基的特征反应。许多胍的衍生物如胍乙酸、胍基丁胺等也发生此反应。

Before the process, the glass surface was sandblasted, chemically pretreated and prepared by using PdCl2 as activator.

在前处理阶段采用喷砂和酸蚀结合的方法对玻璃基体表面进行粗化，使用PdCl2对玻璃基体表面进行活化。

Resin as a solid phase acid is used for the degradation of sulfated polysaccharides at firstly in this paper.

本论文分别采用自由基降解法、固相酸解法和PG寡糖修饰法制备了具有不同硫酸酯基取代度的PGS寡糖。

A four-ball tester was used to evaluate the load carrying and antiwear properties of bismuth dibutyldithiocarbamate,bis-dibutyldithiocarbamates(V7723),sulfurized isobutylene,molybdenum ester non sulfur and phosphorus in a mineral oil respectively and their synergistic effects.

利用四球试验机评价了二丁基二硫代氨基甲酸铋与二丁基二硫代氨基甲酸酯(V7723)、硫化异丁烯和非硫磷钼酸酯添加剂的极压和抗磨性能，以及它们之间的极压和抗磨协同作用。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。