主要产物

Jewish Immigrant Problem was the result of the political,economic and historical development in the USSR; Soviet government's restrictive policies to Jewish immigration led to the emergence of a new,special political gr oup-the Refuseniks, which set the aim of their activities at emigrating abroad ; the emigrating will and the activities of the Refuseniks attracted the attention of the West,especially Americans,and became an important factor influencing the economic and trade relations between the USA ...

苏联犹太移民问题是苏联历史和政治、经济发展的产物。由于受多种因素的影响，苏联对犹太移民的意愿采取限制性的政策，由此产生了苏联政治生活中移民申请被拒绝者这一特殊的政治群体，他们以移居苏联国外为其主要的政治目标。苏联犹太人的移民意愿及移民申请被拒绝者的活动引起西方社会尤其是美国的关注，并在一段时期内成为影响美苏经济贸易关系的一项重要因素。戈尔巴乔夫实行的改革开放政策在一定程度上缓解了这一问题，此后苏联的解体使这一问题的性质和重要性均有所转变。

This article has carried on an overview of biosynthetic pathway of terpenoids and the HMG-CoA reductases.

人参皂苷等萜类生物合成分为甲羟戊酸和丙酮酸两种途径，两者都是以异戊烯基焦磷酸为主要的中间产物。

At the second stage, the maximum mass loss rate occurring at 537.2 degrees C was 0.151 mg/mm. This was the main stage of PF resin pyrolyzing and its total mass loss was 19.57%.

第二阶段，质量损失速率在537.2℃时达到最大值0.151mg/min，共失重19.57%，这是酚醛树脂热分解的主要阶段，释放出H2O、低分子酚类物质、CO2、CH4等低分子烃和CO等热解产物。

Hormones are the main materials which regulate the plant growth and the secondary metabolites formation of plant.

激素是调节植物细胞生长发育和代谢产物形成的主要物质。

The results show that the degradation effectiveness of PVA was optimum when potassium ferrate and sodium hypochlorite were jointly used as the oxidative agent. The removal rate of PVA and COD was more than 98% and 40% under the conditions that the concentration of PVA was 3.0 g/L and the pH value was 7.2, the dosage of potassium ferrate and sodium hypo chlorite were 0.32 g/L and 3.92 g/L, and the reaction time was 50 min. In the process of united oxidative degradation, the chain of PVA was cut off and many low molecular weight compounds were formed. The main degradation products were carboxyl compounds.

结果表明，用高铁酸钾与次氯酸钠联合氧化PVA时，降解效果最佳；在3.0 g/L，pH值为7.2的PVA溶液中，当高铁酸钾与次氯酸钠的投加量分别为0.32 g/L、3.92 g/L，反应时间为50 min时，PVA的去除率大于98%，COD去除率大于40%；在联合氧化降解过程中，PVA断链成小分子物质，最终降解产物主要为羧基化合物。

Under mild hydrothermal conditions, using DETA as structure-directing agent,two three-dimensional gallium phosphites (H3DETA)Ga3(HPO3)4F4 (1) andGa2(HPO3)3 (2) have been synthesized and characterized by single crystal X-raydiffraction.

在合成方面，主要研究作为模板剂的有机胺类的改变对产物结构的影响；通过引入[HPO3]2-的结构基元代替传统的[PO4]3-结构基元，设计合成系列具有新颖结构的无机微孔材料并探讨亚磷酸盐和磷酸盐微孔材料在合成以及骨架结构方面的特点和差异。

By using the results from systemical petrography, X-ray powder diffraction, and EPMA analyses on the run products from experimental simulaion under constant temperature and pressure, we have explored the paragenesis for the pelites suffering metamorphic dehydration under high pressure condition, the process and mechanism for these metamorphic dehydration, and the relation between the components for garnets, one of the major phases in the paragenesis, and the experimental conditions including pressure, temperature, and chemical compositon in a system.

由恒温、恒压实验产物系统的岩相学、X射线粉晶衍射和电子探针分析，揭示了天然泥质岩发生高压变质脱水作用后的矿物相组合，确定了泥质岩高压变质脱水作用的过程和机理，以及主要矿物相石榴子石的组成与压力、温度和体系化学组成的关系。

Higher alcohols in grape wine as yeast metabolite are the main flavoring substance.

葡萄酒中的高级醇为酵母代谢过程产物，是葡萄酒中的主要香味物质。

The chemical kinetic modeling of NO reduction by a typical tar model compound is studied, in order to discover the mechanism of NO reduction by tar. Base on the mechanism of NO reduction by hydrocarbon and non-hydrocarbon intermediates produced in the tar oxidative decomposition, the chemical kinetic modeling of NO reduction by toluene is studied.

分析结果表明，苯、甲苯、苯乙烯和苯酚均有明显的累积离子流峰面积，是生物质焦油的主要组分，涵盖了初级、二级和三级焦油产物，所以选取苯、甲苯、苯乙烯和苯酚作为典型的生物质焦油的模型化合物。

The art of seal is a unique product bred by Chinese culture which relying on the Chinese characters especially the seal character.

印章艺术是中国文化孕育下而产生的中国特有产物，它所依托的载体是汉文字，又主要依托于汉字中的篆字。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。