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The new methods allow a wide range of poly analogs to be obtained in few steps, as the allylic precursors are readily available.

新方法允许范围广泛的聚类似物，以获得在几个步骤，作为烯前体是现成的。

Reliable bond dissociation energies of various allylic compounds were obtained using compound methods.

使用复合从头算方法系统地获得了一批精确的烯丙位化学键的均裂裂解能。

When ligands with only planar chirality were used in the two model reactions (allylic alkylation and amination), comparatively high enantioselectivities were obtained.

令人鼓舞的是设计合成的只具有平面手性的膦氮配体，也可以取得中等到良好的对映选择性。

There were few successful examples of regioselectivity in reactions of unsymmetrically allylic derivatives, and enantioselectivities obtained with prochiral nucleophiles.

因而我们选用反应机理相对比较清楚的钯催化烯丙基取代反应来研究平面手性的作用。

If aloe plants are not easily obtained in your area, you can always get one on the internet.

如果芦荟植物是不会轻易得到您的地区，您可以随时得到一在互联网上。

First, binary texture matrixes of horizontal and vertical direction were constructed in the template and target image, and then the prime matching result of the two directions was calculated according to the Alogical XOR logical operation in bytes and the final target correlation credibility was obtained by proportion sum at last.

在模板与目标图像中分别提取水平、垂直方向上的二值化纹理特征矩阵，然后根据字节同或逻辑运算分别计算两个方向上的最佳匹配值，最后，通过加权求和得到最终的目标相关置信度。

Satisfactory isolation of liver and bone isoenzymes of ALP was obtained with this method.

通过这种方法，L-ALP和B-ALP得到了很好的分离。

Much gene information reflecting the physiologic characters and functions of the white young alpaca skin were obtained.

基因信息反映了青年期白色羊驼皮肤的生理特性和功能；该文库的构建是有效地发现新基因的理想资源。

Alpha iron nanoparticles with about 20~400nm size were obtained in the W/O microemulsion system.

采用油包水的微乳液体系制备了粒度为20~100nm的α-Fe。

Based on the second- and fourth-order compact difference formulas for second-order derivatives and the idea of weighted average, two classes of the alternating direction implicit method are proposed for solving two-dimensional wave equation. The methods are of accuracy O (T^2+h^4) and O (T^4+h^4) respectively. Stability conditions are obtained by Fourier analysis method.

基于二阶微商的四阶紧致差商逼近公式及加权平均思想，提出了数值求解二维波动方程的2种精度分别为O(т^2+h^4)和O(т^4+h^4)的交替方向隐式格式，以及与其相匹配的第一个时间层的同阶离散格式，并且通过Foulier方法分析了格式的稳定性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。