保护基

Both star copolymer precursors are hydrolyzed in the acidic conditions, then the corresponding recovered star copolymers of EO and glycidol with multi pending hydroxylmethyls are esterified with 2-bromoisobutyryl bromide to produce the ATRP macroinitiators with multi pending bromoisobutyryl groups . Then the latters initiate the polymerization of styrene to form the corresponding amphiphilic three- and four-arm star PEO-g-PS.

在阴离子共聚EPEE单体和环氧乙烷单体的过程中，通过变换引发剂体系中的醇的结构(由原来的二元醇变成多元醇，如三羟甲基丙烷和季戊四醇)，合成了星形结构的共聚物，通过水解反应脱去保护基团后，再与2-溴异丁酰溴反应，得到链的侧端挂有很多2-溴异丁酸酯基的星形大分子引发剂，通过ATRP聚合机理引发苯乙烯聚合得到PEO为主链，PS为侧链的星形一接枝共聚物。

Punica granatum L.may protect erythrocyte membrane from the lipid peroxidative damage induced by radicals.

石榴皮对自由基引起的细胞膜脂质过氧化损伤有保护作用。

It is mainly inhibited as glomerular sclerosis, renal interstitial fibrosis and intrarenal vascular sclerosis.

目前，肾保护的研究主要从防治肾小球硬化、肾间质纤维化和肾内血管硬化等方面进行，其中减少细胞外基质过度积聚是其核心环节。

The conversion of isobutyraldehyde and the selectivity to 2,4,6-triisopropyl-1,3,5-trioxane were 91.1% and 99.8% respectively under optimum reaction condition isobutyraldehyde 25.0 g, [Et3NH]Cl/FeCl3 ( x (FeCl3)＝0.62 1.0 g, 25 ℃ for 1 h .

在最佳的反应条件下（异丁醛25.0 g， [Et3NH]Cl/FeCl3 x (FeCl3=0.62 1.0 g， 25 °C，N2保护下反应1 h，异丁醛的转化率为91.1%，对2，4，6-三异丙基-1，3，5-三氧噁烷的选择性达99.8%。

It is probable that the influence of the old Arabic conception of the duty of caring for whomsoever the tribe had taken under its protection is to be seen here; according to that conception, difference in religion was not sufficient ground for making an exception an example of this may be found in "Kitab al-'Aghani," xi.

这是可能的影响，旧的观念阿拉伯文的义务，照顾谁的部落已采取的保护下是在这里看到，根据该构想，宗教的差异是不够的理由，使一个例外（例如这可能会发现在&基塔基地，'Aghani ，&十一。

These findings suggested that protection of VEC and inhibition of platelet activation as well as ET releasing, and strengthening intracellular antioxidant defense system might be one of the potential machinism of the beneifitial effects of YXT capsule in treating UA.

提示愈心痛胶囊的疗效可能是通过保护VEC免受损伤，对抗ET，抑制血小板活化，清除体内氧自由基和减轻脂质过氧化损伤等机制来实现的。

Scanning electron microscope studies the result shows an all matrix that forms a brick what make brilliant appearance partly among them, at the same time other part surrounds the thick grain in square magnesian stone all round, protect them to resist thereby corrode.

扫描电子显微镜探究结果示出构成晶相的其中一部分形成砖的全部基质，同时其它部分包围在方镁石的粗颗粒四周，保护它们从而反抗腐蚀。

Carbowax of matrical suppository can dissolve in water and various organic solvents, having superior lubricity and thermostability, having no toxicity and stimulation. The electrolysis has no influence on it dissolved in water. As a excipient , it has a protection to the interferon albumen.

本处方系参照《药剂学》中的配方而设计的，栓剂基质聚乙二醇能溶于水和多种有机溶剂，有优越的润滑性及热稳定性，几乎没有毒性和刺激性，对水的溶解性不受电解的影响，用做赋形剂，对干扰素蛋白有保护作用。

The coatings formed on Q235 steel possess microcrystalline structure, with a thickness about 100 m. The micro-crystal line structure is achieved due to the high cooling rate during deposition. The quality of the coatings is enhanced by using Ar to protect samples from oxidation. The coatings are metallurgically bonded to the substrate without obvious interface.

采用振动式电脉冲沉积技术沉积涂层时，铝电极与工件瞬时接触放电，可以达到很高的温度，从而形成了铁铝金属间化合物涂层，而且涂层与基体为冶金结合；涂层冷却速度很快，由此获得微晶结构涂层；流动的氩气可有效地保护涂层的质量。

In this paper, the structures of methylglyoxal and 1,1-dimethoxy-2-propanone are identified by GC-MS, NMR and the standard samples. The reaction conditions of catalyst oxidation and acetalation according to reaction mechanisms are discussed.

本文运用质谱、核磁和标样确定了中间体丙酮醛及其产物1，1-二甲氧基丙酮的结构，并结合反应机理对催化氧化和醛保护的反应工艺条件进行了探索。

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。