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II. Oxidation of α,β-Unsaturated Ketones with Hypervalent Iodine Reagent Literatures reported that lead acetate-borontrifluoride etherate (LTA/BF3-Et2O) can transform α,β-unsaturated ketone to β,γ-unsaturated carboxylic acid ester through an one-step oxidative rearrangement reaction. Our research along this line indicated that hypervalent iodine reagents can also affect the same reaction.

II。 高价碘对α，β-不饱和酮之氧化研究先前已有文献指出用leadacetate-borontrifluoride etherate (LTA/BF3-Et2O)做氧化剂，可以经由一步的重组氧化反应把α，β-不饱和酮(α，β-unsaturated ketones)氧化成β，γ-不饱和碳酸酯(β，γ-unsaturated carboxylic acid esters)衍生物。

Process for the preparation of phosphatidylserine of formula wherein R and R independently represent a saturated, mono-unsaturated or polyunsaturated acyl C10-C30, X=OH or OM where M=alkaline or alkaline earth metal, ammonium, alkylammonium including the transphosphatidylation reaction between phosphatidylcholine of the general formula wherein R and R and X have the above specified meanings, R=CH2-CH2- NH2 o CH2-CH2-N(CH3)3 and Serine in D, L or racemic form catalysed by the phospholipase D enzyme, characterised in that said reaction is carried out in a hydroalcoholic medium containing an aliphatic alcohol and in the presence of bivalent metal oxide.

本发明涉及制备式CH 2 OR 1 CHOR 2 CH 2 O-P-OCH 2 -CH(NH 2 )-COOHX的磷脂酰丝氨酸的方法，其中R 1 和R 2 独立地表示饱和的、单不饱和的和/或多不饱和的酰基C 10 -C 30 ，X＝OH或OM，其中M＝碱或碱土金属、铵、烷基铵，该方法包括通式CH 2 OR 1 CHOR 2 CH 2 O-P-OR 3 X的磷脂酰胆碱其中R 1 和R 2 以及X具有上述特别的含义，R 3 ＝CH 2 -CH 2 -NH 2 或CH 2 -CH 2 -N (CH 3 3 与D、L或外消旋形式的丝氨酸之间的转磷脂酰化反应，该反应是通过磷脂酶D酶催化的，其特征在于所述的反应是在包含脂族醇的含水醇介质中并且在二价金属氧化物的存在下进行的。

The characteristics of the resaturated absorbing water of Platycladus orientalis, Juniperus rigida, Hippophae rhamnoides, Populus adenopoda under the different deficit in Huhhot were studied.

以生长在呼和浩特地区的侧柏、杜松、沙棘、新疆杨为对象，研究其小枝在不同水分亏缺状态下恢复吸水能力，结果表明：(1)小枝重饱和初始水分亏缺程度越大，重饱和相对饱和含水量越小，失水后水分恢复能力也越低，树木组织受到的伤害越严重。

The present invention discloses a polycarboxylic acid copolymer which is obtained by copolymerization of monomer components comprising a polyalkyleneimine unsaturated monomer (A2) and an unsaturated carboxylic acid monomer, the polyalkylene glycol unsaturated monomer (A2) having an oxyalkylene group bonded to a polyhydric alcohol residue, and the monomer component containing an unsaturated monocarboxylic acid monomer.

公开了一种多元羧酸共聚物，它是通过单体组分共聚制得的，所述单体组分包括聚二醇不饱和单体(A2)和不饱和一元羧酸单体，所述聚二醇不饱和单体(A2)具有使氧化烯基结合到多元醇残基上的结构，所述多元醇残基平均每个分子具有不少于3个羟基。

The empirical rule governing the position of double bonds in olefinic acids was referred to by analyzing electron impact spectra of the chemical products modified by 2-amino-2-methylpropanol of the fatty acids. This method provides a new technical tool for analyzing fine structures of unsaturated fatty acids.

通过解析不饱和脂肪酸2-氨基－2-甲基丙醇化学修饰产物的EI质谱图，得到了不饱和脂肪酸中碳碳双键的定位规则，从而为分析不饱和脂肪酸精细结构提供了手段。

Cerevisiae GAPp, suggesting that H. polymorpha △9-fatty acid desaturase was compatible with desaturation system of S. cerevisiae whereas the promoter of H-OLE1 gene had no activity in heterologous cells.

说明H-OLE1基因编码△9-脂肪酸去饱和酶，多形汉逊氏酵母的△9-脂肪酸去饱和酶和酿酒酵母的脂肪酸脱饱和系统相亲和，而H-OLE1基因的启动子在异源细胞中没有活性。

The unsaturated hydrocarbon stream 10 primarily comprises one or more unsaturated hydrocarbons, but it also contains one or more highly unsaturated hydrocarbons such as for example and without limitation acetylene, methylacetylene and propadiene.

所述不饱和烃料流10主要包含一种或多种不饱和烃，但它也含有一种或多种高度不饱和烃例如但不限于乙炔、甲基乙炔和丙二烯。

In this thesis, the reaction of methanol conversion into hydrocarbons on HZSM-5 and SAPO molecular sieves, which is of great importance to industry, is selected as probe reaction to get deeper insights into the structure of solid catalysts and the interaction of reactants with catalysts during adsorption and catalytic reaction by solid state NMR.

本论文主要以固体NMR为研究手段，以甲醇制烃类作为探针反应，详细研究了催化剂的结构、吸附过程中反应物与催化剂的相互作用、反应过程中反应物与催化剂的相互作用，主要取得了如下结果： 1 原位MAS NMR实验结果表明，甲醇制烃类的过程是通过&碳池&机理来实现，&碳池&的组成随反应的进行而变化，在反应前期，&碳池&由饱和烃类构成，随着反应的进行，饱和烃类和不饱和烃类共同组成&碳池&。

Some similar responses were observed in the both species.(1) After saturating illumination for 3 h, the original fluorescence Fo increased while the PSⅡ photochemical efficiency Fv/Fm declined significantly, but these parameters could largely recover to the levels of dark-adapted leaves after 3 h of subsequent dark recovery.(2) No net loss of the D1 proteins occurred after the saturating illumination.

一方面，大豆和南瓜叶片在饱和光下产生一些相同的变化：（1）经过3小时饱和光处理，它们的初始叶绿素荧光参数Fo都明显升高，而PSⅡ光化学效率Fv／Fm都明显降低，但经过随后的3小时暗恢复后，Fo和Fv／Fm都可以恢复到初始暗对照的水平；（2）在饱和光处理和随后的暗恢复过程中都没有发生D1蛋白的净损失。

According to the appearance that the gas in soil can effect the propagate of stress wave, and combine with some test conclusions in three—phase saturated soil under explosion wave, theory of mixture is applied in this paper and the dynamic analysis model and constitutive relation are built.

根据土中气体的存在对应力波的传播有显著影响的现象，以三相饱和土为研究对象，结合三相饱和土在爆炸载荷作用下的有关试验结论，以混合物理论为基础建立动力分析模型和本构关系，在此基础上得到用于三相饱和土的有限元方程，计算结果揭示了动力固结法的若干特点。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。