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In order to develop an useful synthestic process, we have synthesized amides with various substitutents. The isoquinoline skeleton was constructed through Bischler-Napieralski reaction, followed by asymmetric reduction of the imine intermediates with a Ru complex to form the only chiral center. Finally, we connected the two phenyl groups by Heck reaction and effectively obtained optically active aporphine alkaloids.

为了发展一套实用的合成方法,我们首先制备於苯环上具有不同种取代基的苯乙醯胺,接著透过Bischler-Napieralski反应进行分子内合环,并利用钌金属对亚胺中间体进行不对称的还原反应,建立出产物中唯一的光学活性中心,最后再利用Heck反应连结两个苯环,就可以顺利得到具有光学选择性的阿朴吩类天然物。

This paper discovered that different heavy metals or the same metal but different chemical states show different effects on foraminiferal features.

本文则进一步发现,不同的重金属或同种重金属不同的化学存在形态对有孔虫的致畸的作用是不同的。

Results indicated that the different pH and size of hydrolyzation group influence the particle size of self cross-linking aqueous polyurethane dispersions.

结果表明,不同的pH对同种乳液的粒径大小有一定的影响;不同的水性聚氨酯乳液粒度在相同pH下,也随水解基团的水解能力大小而变化。

On base of analysis to simulation result, it was point out the main cause making dissimilar metal"s bonding so difficult was metal"s inharmonic plastic deformation. The distribution and changement of stress and strain on interface and in workpieces were analyzed.Making use of experiment and simulation result, main factors that influence welding property of cold pressure welding were discussed.

通过对模拟结果的分析,说明了异种金属冷压焊较同种金属冷压焊困难的原因主要是界面处两种材料的径向和轴向的不协调塑性变形;直观地显示了冷压焊过程中工件内部及界面处的应力应变分布及变化情况。

The result fights allergic experiment to show, dispel the wind stops land of can different level restrains urticant Ding allergy of akin and passive skin mixes the bandicoot that antiserum causes 2, the sex of small rat late hair of chloric benzene be caused by exceeds 2 nitro- of 4- quick the thymus index that reaction; still can increase small rat when dosage greatly and lienal index; stop urticant experiment shows, dispel the wind stops urticant Ding can reduce the time of fit of small rat itching with dextrose lead anhydride and itching duration apparently, can increase Guinea pig to be able to bear or endure those who suffer phosphoric acid histamine send urticant threshold.

结果抗过敏试验显示,祛风止痒酊能不同程度地抑制抗血清诱发的大鼠同种被动皮肤过敏和2,4-二硝基氯苯所致的小鼠迟发性超敏反应;大剂量时还可增加小鼠的胸腺指数及脾指数;止痒试验显示,祛风止痒酊能明显降低右旋糖酐诱导的小鼠搔痒发作次数及搔痒持续时间,并能增加豚鼠耐受磷酸组胺的致痒阈。

It also contained Chlorophyll-c2 and Chlorophyll-c2 derivatives. 4. The phylogenetic analysis of MD1 18S rDNA by using NJ method indicated that MD1 belonged to the genera Nitzschia. MD1 was closest to the Peridinium foliaceum endosymbiont(Y10567) and formed one clade each other in the phylogenetic tree.

在序列的遗传距离研究中,MD1与Peridinium foliaceum endosymbiont(Y10567)的18S rRNA基因序列的相似性接近种的定义标准,且在系统发育树中聚在一起,但未得到显著的BP支持率,故不能定义为同种。

Odor preference and behavioral interactions of unrelated and unfamiliar adult ratlike hamsters were studied during the nonbreeding season in the laboratory.

在实验室通过对陌生成年大仓鼠非繁殖期的气味偏好、性别选择和两鼠间的行为关系的实验研究表明:用Y-型迷宫进行选择测试时,与空白组比较,大仓鼠偏好同种个体巢垫的气味;在雌雄巢垫气味之间,雌鼠偏好雄性巢垫的气味,雄鼠不表现性别偏好。

Odor preference and behavioral interactions of unrelated and unfamiliar adult ratlike hamsters were studied during the nonbreeding season in the laboratory.

摘 要 在实验室通过对陌生成年大仓鼠非繁殖期的气味偏好、性别选择和两鼠间的行为关系的实验研究表明:用Y-型迷宫进行选择测试时,与空白组比较,大仓鼠偏好同种个体巢垫的气味;在雌雄巢垫气味之间,雌鼠偏好雄性巢垫的气味,雄鼠不表现性别偏好。

By comparing the amino acids sequences of SCRs of different regulators of complement activation and homologous structure units of DAF in different species, the conservative and nonconservative amino acids in DAF were determined. The possible activity sites were analysed and mutation amino acids sites to construct the mutant library were defined.3. Constructing and evaluating of yeast display mutant library on DAF scaffold.

SCRs多重序列比较及DAF突变位点的选择通过对补体调控蛋白家族成员、不同种属DAF分子的同源结构单位SCR的氨基酸序列进行多重序列比较,确定了DAF分子中的保守性氨基酸和非保守性氨基酸,并根据已有的实验结果,对DAF分子可能活性位点进行了分析,确定了构建酵母细胞表面呈现库的突变氨基酸位点。

As soon as embryonic tissues are sufficiently differentiated movement and primitive stages of behavior appear, and these develop pari passu with further embryonic development.

只要胚胎的组织一经过充分的分化,行为的动作和行为的原始阶段就会出现,而且这些发展和进一步的胚胎发展同种速度。

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The objective is to subjugate and discourage the people, because that allows the elite to continue to rule unopposed.

其目的是压制和打击人民的积极性,因为这可以让实权派继续统治不会沦为反对派。

GOD,this is the second time you vanquished me!

天啊,这是第二次你打败了我!

So a kind of strong antagonism permeated in the relations of two countries.

所以两国这一时期的政治关系始终弥漫着一种强烈的对抗情绪。