保护基

Analyse and compare what adopt a variety of pair of methods, the Michael addition reaction of ester of acerbity second of second of hydroxyl of protection of benzyl of the response of close nucleus addition that uses second nitrile and ester of formic acid second certainly, chloridize, cyanogen, reaction that take off carboxyl generates 3- benzyl oxygen radical the fifth of the ten Heavenly Stem the method of 2 nitrile, detailed discussion the action that wait and the by-product that arise possibly reach the reactant in each pace reaction, activator, dissolvent avoid a method.

通过对多种方法的分析和比较，确定采用乙腈和甲酸乙酯的亲核加成反应、氯化苄保护羟基、氰乙酸乙酯的Michael加成反应、脱羧反应生成3-苄氧基戊二腈的方法，并具体的讨论了每一步反应中反应物、催化剂、溶剂等的功能和可能产生的副产物及避免方法。

N-Carbobenzoxy-L-homoserinelactone was prepared via N-alkylation reaction of L-methionine and iodoacetamide with benzyl chloroformate as amino protecting agent.

以L-蛋氨酸为原料，氯甲酸苄酯为氨基保护试剂，与碘乙酰胺(I2微量)内酯化反应，合成N-苄氧羰基-L-高丝氨酸内酯。

Keywords Cucumber;heat tolerance;heat injury symptoms;cDNA-AFLP;transcription repair coupling factor - TRCF;protective enzyme;HSP70 gene of the chloroplastic gene

Article From 南京农业大学；蔬菜学博士论文 2007年度黄瓜；耐热；热害症状； cDNA-AFLP；转录修复偶联因子；保护酶；叶绿体基质HSP70基因

The rats in the fasting group and early nutrition group were given intraperitoneal injection of balance liquid and gastric clysis of nourishment product respectively, 30 ml every 6 h within 48 h after burn injury.

目的 研究早期肠道营养对血清肿瘤坏死因子α和氧自由基水平的影响以及对机体的保护作用，为临床烧伤患者早期肠内营养支持治疗提供依据。方法建立wistar大鼠重度烧伤模型。

The hydrophobicity of amino acid residues in the α-crystallin domain of small heat shock proteins is thought to be important for polypeptide binding and play key roles in substrate protection.

低分子量热休克蛋白α-水晶体蛋白区域的胺基酸疏水性与多胜肽的键结有其重要性并扮演著保护受质蛋白的功能。

Patch characteristics indicated that the degree of fragmentation for the natural broadleaf forest was lower than for artificial landscapes of Phyllostachys pubescens, Cunninghamia lanceolata, and Camellia sinensis. Therefore, to maintain sustainable development in the region, and especially to enhance protection for the broadleaf forest matrix, intense human activity and tourism should be reduced.

景观要素的斑块特征表明，在目前干扰强度下，阔叶林景观的连通性尚好，破碎化程度低；毛竹纯林、杉木纯林和茶园等人工或半人工经营景观的破碎化程度高，建议应该减少强烈的人类经营活动和旅游，特别要加强对阔叶林基质的保护，实现区域可持续发展。

The anti-cancer effects of garlic garlic from its contain thiol compounds (for example: diallyl disulfide), these substances can affect the metabolism and elimination of carcinogens, thereby protect human health.

大蒜 大蒜的防癌功效来自其所含的巯基化合物，这类物质可以影响体内代谢及消除致癌物，进而保护人体的健康。

The ethnobotanical study of bamboo resources, is not only a prerequisite for sustainable development of bamboo resources, but also more importantly can be used for providing framework for feasible in situ and ex situ conservation by indigenous knowledge system.

许建初 ，裴盛基，陈三阳，王慷林竹类资源的民族植物学研究，不仅是竹类资源可持续发展的前期要求，而且最重要的是其能利用传统知识系统去建立一个适宜的就地和迁地保护的框架。

As expected from the reaction mechanism, the carboxyl groups of aspartic and glutamic acid residues were not modified, while the amino group s that could react with the activated peptides were concomitantly protected by formylation.

如反应机理所预测的那样，天门冬氨酸和谷氨酸残基未被修饰，而能与活性肽反应的氨基则同时被甲酰化保护起来。

As expected from the reaction mechanism, the carboxyl groups of aspartic and glutamic acid residues were not modified, while the amino groups that could react with the activated peptides were concomitantly protected by formylation.

如反应机理所预测的那样，天门冬氨酸和谷氨酸残基未被修饰，而能与活性肽反应的氨基则同时被甲酰化保护起来。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。