产下

Therelationship of the amount of catalyst and the ee% of product was seen to be negative nonlin-ear. Catalyst 3 was used in the enantioselective addition of diethylzinc to aromatic aldehydesand gave good results. The configuration of products was determined by the configuration ofthe catalysts' chiral carbon linked with hydroxy group. Using β- amino alcohols bearing only one chiral center as catalysts for the enantiose-lective addition were studied. D-N, N-dialkyl-2-amino butanol gave poor catalytic effect be-cause of their structure. The configuration of the product is the same as the catalyst. Anotherkind of β- amino alcohols - phenylglycine derivatives and valine derivatives have chiralcenter on the carbon linked with amino group. Catalyzed by-phenylglycine derivatives 6,7, 9, 10, the reactions gave satisfied results. The optical yields exceeded 80%.

在探讨了含有两个手性中心的β-氨基醇之后，选择了只有一个手性中心的β-氨基醇，一是手性中心为连羟基的手性碳原子：D-N，N-二烷基-2-氨基丁醇；二是手性中心为连氨基的手性碳原子：D-苯基甘氨酸衍生物和L-缬氨酸衍生物。D-2-氨基丁醇的催化效果不太好，这与其结构的空间位阻较小有关系，反应产物与连羟基手性碳构型一致；由苯基甘氨酸和缬氨酸出发合成五种β-氨基醇6-10，研究了不同ee％的-6作用下的二乙基锌-苯甲醛加成反应，发现该催化剂具有不对称放大效应；-7，9，lO的催化效果也比较令人满意，光学产率80％以上，所得产物构型与催化剂构型一致。

The results for H2 production from photodecomposition of H2S showed the highest H2 evolution rate could reach 7.61mmol/g·h over Cd0.7Zn0.3S photocatalyst calcined under N2 atmosphere at 650℃.

光催化分解硫化氢制氢实验表明，在650℃，N2气氛下焙烧的Cd0.7Zn0.3S最高的产氢速率可达到7.61 mmol/g·h。

The gold orebody exists in phyllite, the second member of Gaixian Formation, Liaohe Group, lowerProterozoic Erathem, mainly in the form of vein, layer and lens, controlled by NNEschistosity belt and low order, secondary structure fissure.

金矿体主要以脉状、似层状、透镜状产于下元古界辽河群盖县组二段的千枚岩中，受北北东向片理化带及低序次构造裂隙所控制。

The temperature effect on the oil yield was discussed at first. Then, analytical work was carried out as follows: the ultimate analysis and physi-chemical analysis of the pyrolytic oil comprised a sketch of the fuel properties of the oil; Then, through the distillation analysis of the oil, the fraction composition of the "unrefined"oil was known. After that, a general knowledge of the aromaticity and saturation of the hydrocarbons in the oil was provided by the outcome of the FT-IR functional group analysis. Also, from the analysis, the form of the polar functional groups and their distribution in different fractions of the oil were learned.

文中首先对不同热解温度下热解油产率进行分析讨论，然后，针对热解油品质进行了一系列分析：通过元素组成和理化特性的分析，对热解油作为燃料特性有了一个大致了解；通过实沸点蒸馏分析，得到热解油作为一种未提炼油的馏分分布，并为后续热解油馏分的细入分析提供了前提；通过对热解全油和各窄馏分的FT-IR官能团分析，对热解油的芳香性、不饱和性有了整体的了解，并且清楚了热解油中的极性官能团存在型式及其在热解油不同馏分中的分布。

In the social fabric which they determined to destroy, they saw Primogeniture resting chiefly on Family settlements, but they also perceived that Testaments were frequently employed to give the eldest son precisely the same preference which was reserved to him under the strictest of entails.

在他们决定要加以摧毁的社会组织中，他们看到"长子继承权"主要建筑在"家族"授产的基础上，但他们同时也注意到"遗命"在严格限嗣继承下常常被用来以为他保留的完全相同的优先权给予长子。

The optimal reaction conditions were as follows: the molar ratio of propanol to acid was 1:1, the mass ratio of the catalyst used to p-nitrobenzoate was 6%.

合成硝基卡因的最佳工艺条件为：醇酸比为1：1，催化剂的用量为对硝基苯甲酸的6%，在回流温度下反应14h，产率达到79.5%。

Under optimum synthetic con dition, the yield of propyl ester was 93.5%.

在最佳反应条件下，尼泊金丙酯的产率为93.5%。

Absolute open flow is a important index of appraising oil/gas well production capacity,and often used in oil/gas well classification、proration and dimensionless parameters in other equations and so on,it denotes oil/gas productions under full openness of well bottom.

无阻流量是评价油气井生产能力的重要指标，也常用于油气井分类、配产和其它公式中参数的无因次化等，它表示井底在完全敞开的情况下油气井的产量。

Study on Surface Enhanced Raman Scattering of Piperidine;2. Using piperidine as catalyst and ethanol as solvent, a series of new 2-amino-3-cyano-4-aryl-6-methoxy-1,4,9,10-tetrahydronaphtho[2,1-b]pyran derivatives were synthesized by one-pot reaction of aromatic aldehydes, malononitrile and 7-methoxy-1,2,3,4-tetrahydronaphthalen-2-one at room temperature in good yields.

以芳醛、丙二腈和 7 甲氧基 1，2 ，3 ，4 四氢萘 2 酮为原料，在六氢吡啶催化下以乙醇为溶剂，在室温合成了一系列新的 2 氨基 3 氰基 4 芳基 6 甲氧基 1，4，9，10 四氢萘并 [2 ，1 b]吡喃衍生物，反应条件温和，产率较高，并通过IR ，1HNMR和元素分析表征产物的结构，还通过单晶X射线衍射分析确证产物的构

This paper introduces the advantages of ISOCS measurement method by efficiency calibration without a radioactive source , comparing with traditional measurement methods of environment samples.

ISOCS系统[1](In-SituObjectCountSystem)是由美国Canberra公司开发的现场物体计数系统，它能够在放射性剂量产生地，现场条件下直接进行γ能谱测量和分析。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。