保护基

In even more preferred embodiments, the amount of the preferred stereoisomer is at least 95%, even more preferably at least about 97% of the total amount of phenylseleno blocked lactone produced.

在更优选实施方案中，优选异构体的量至少为生成的含有苯硒基的保护内酯总量的95％、甚至更优选为约97％。

In certain preferred embodiments, the preferred phenylseleno blocked lactone is obtained in an amount representing approximately 90% or more of the total amount of the stereoisomers obtained.

在某些优选实施方案中，优选得到的含有苯硒基的保护内酯的量大约为所得到的异构体总量的90％或更多。

In order to reach the purpose of using pre-laser cladding method preparation of Ni-based amorphous alloy coatings on 45 steel substrate surface by the method was carried out. The principles of the three clusters and the amorphous line of the law of composition rules were used. The Ni59.35Nb34.45Sn6.2 alloying powder which has a great glass-forming ability in conventional preparation methods of amorphous alloys was chosen. In the protection of atmosphere, the amorphous surface coating was prepared. The microstructure, micro-hardness and performance of the different output power of the laser cladding were analyzed.

中文摘要：为了达到研究预置激光熔覆可以在45钢上制备Ni基非晶合金涂层的目的，采用非晶形成能力三判据原则及非晶成分团簇线定律法则，选择了采用常规非晶合金制备方法中具有极大玻璃形成能力的Ni59.35Nb34.45Sn6.2合金粉末，在保护气氛下，制备非晶涂层，并对不同输出功率下得到的涂层进行微观组织和结构表征及性能测试。

This study deals with butterfly diversity and conservation of rare as well as insect fauna species in Baishuijiang Natural Reserve in Gansu Province. The research includes field investigation, observation at certain time and places, captive breeding in experimental area etc. Butterfly species diversity in Baishuijiang Natural Reserve and variation regulation of butterfly diversity in different areas are studied. The relationof butterfly diversity with environmental factors such as vegetation destruction, human disturbance are strenthened in Bifeng Gully. The biology of two rare butterfly species is studied. Meanwhile, this study deals with insect α-diversity and β-diversity in Baishuijiang Natural Reserve and inquire into the mechanisms of ecological control by protecting and recovering vegetation. The research includes field capture with sweeping net, light trap, transect investigation.

在甘肃省白水江自然保护区碧峰沟通过野外调查、定点定时观察、实验地饲养等研究了白水江自然保护区两种珍稀蝴蝶红基美凤蝶和巴黎碧凤蝶的生物学特性，在保护区范围内通过网捕采集研究了蝶类物种多样性和不同区域内蝶类多样性的变化规律；同时在碧峰沟四种不同生境中通过灯诱获得标本，研究了该地区不同生境中的昆虫种类组成及其多样性，分析了决定物种丰富度的关键因子，与蝶类多样性进行了比较分析，并提出了具体的保护措施。

Without any protection, the migrant caretakers only rely on individual luckiness to work in Taiwan.

因为被排除於劳基法的适用范围，外籍家庭类劳工没有任何法令的保护，来到台湾只能碰运气，运气好的遇到好雇主，运气不好只能在恶劣的劳动条件中，为了生存而奋斗。

It was transported hours later to the Marine Mammal Conservancy in Key Largo for treatment, but died unexpectedly on Wednesday.

几个小时之后，该幼鲸被运到基拉戈的海洋动物保护中心进行救治，不料星期三死亡。

It involved the converstion of vanillin into hydrazine (4) and the metalic reduction of hydrazine 4 into the intermediate vanillic amine.

以价廉易得的香草醛为起始原料，经过3步反应，高产率合成了酚羟基由对甲苯磺酰基保护的香草胺类化合物5。

Different from the most of antioxidants, its activation factor microsome is one in five thousand of human blood cells and it can go through the blood-brain barrier, playing a role to protect the brain and the blood vessels from the radical damage increased with age.

它与其它抗氧化剂不同，它的活化因数微粒是人体血球的五千分之一，可以穿越血脑屏障，起到保护血管和大脑免受随年龄增长而增多的自由基的破坏。

Monkshood can inhibit the gathering of platelet and improve the microcirculation of ischemic tissue simultaneously.

同时人参皂甙能提供能量基质，增加底物水平磷酸化，促进三磷酸腺苷、磷酸肌酸的合成，保护细胞线粒体钙泵活性，减少线粒体膜磷脂降解，保护膜系统完整；附子能抑制血小板的聚集，改善缺血组织的微循环。

To give someidea of how de Montmorency's wealth, cultivation and connections found expression here, a portico was added in around 1550 to the castle to shelter Michelangelo's "Slaves".

让我们举个例子，来想象一下蒙莫朗西公爵所拥有的财富，品味以及与达官显贵们的关系，这座城堡大约于1550年加盖了一座柱廊用来保护米开朗基罗的作品："奴隶"。

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。