化

In the case of coat color, cells descended from a particular precursor stay together and thus form a patch of the same color, creating the pattern of visible variegation.

甲基化状况可以因两种方式而丧失。甲基可能被一种去甲基酶主动除去，或者甲基化在复制产生的半甲基化位点不能发生。

Vector field visualization is an important part of visualization in scientific computing.

矢量场可视化是科学计算可视化的重要组成部分。提出了一种新的平面矢量场可视化

Veratrum aldehyde synthesis of many drugs intermediates, methyl aldehyde method for raw materials in Champlain, after dimethyl sulfate methylation available to 20% sodium hydroxide as the solvent, 10-11 in the PH value of the under the conditions of synthesis; microwave irradiation is the use of microwave radiation heating to replace the traditional approach to synthesis of a product of methylation reactions, this method does not require solvents, and less by-products, but still need to use 15% sodium hydroxide to adjust pH.

藜芦醛是许多药物合成的中间体，甲基化法以香兰醛为原料，经过硫酸二甲酯甲基化可得，以20%氢氧化钠为溶剂，在PH值为10-11的条件下合成；微波辐射法是利用微波辐射代替传统加热方式进行甲基化反应合成产物，这种方法不需要溶剂，并且副产物少，但仍需要用15%氢氧化钠来调节酸碱度。

The results show that (1) grammatical metaphor is frequently used in a variety of scientific areas;(2) the grammatical metaphor of nominalization is comparatively more often seen than that of verbalization, and (3) more than half of the nominalization has carried the affixes of "-tion" and "-ing".

调查结果发现：语法隐喻在科技论文语篇中频繁地使用；名词化隐喻较动词化隐喻更为多见；50%以上的名词化隐喻形式带有"-tion"和"-ing"词缀。

The principle of using ultrasonic wave to detect the vermicular graphite rate in vermicular iron is introduced.

介绍了超声波声速测定蠕墨铸铁蠕化率的原理，通过用金相和超声波两种方法对蠕墨铸铁蠕化率进行对比测量，验证了蠕化率与声速的对应关系。

There is akey stage of nucleic acid metabolism in the process of vernalization in winter wheat.

在冬小麦春化进程中存在着一个核酸代谢的关键期，为了探讨春化作用的分子机理，以不春化及脱春化的冬小麦京冬1号（Triticum aestivumL.cv。

Via comprehensive computations, the possibilities of vinylidene and allene intermediates were excluded, and the reaction mechanism was found to contain the following three steps:(1) gold-catalyzed cyclization to give the cyclic intermediate,(2) the cyclic intermediate undergoing a 1,3-H migration to give a more stable intermediate, with the assistance of water-cluster,(3) finially, the 1,2-H or 1,2-silyl migration occuring for generation of the observed product.

通过对各种可能的反应路径的进行计算和比较，排除了亚甲基卡宾和连二烯中间体的可能性，并确定该异构化反应机理包含以下三个步骤：（1）炔丙基吡啶反应在金催化条件下发生分子内的成环得到环状中间体；（2）环状中间体在水分子簇的协助下优先发生1，3-氢迁移反应，异构化得到更为稳定的中间体；（3）最后再进行1，2-氢迁移或是1，2-硅烷基团迁移即得到实验中所观察到的环异构化产物。

Digital painting and design make it possible to display architecture environment in multidimensional way, to vivify the fresco design ideas in a clear way, and to show the aesthetic impinge of the material and texture in an effective way.

数码设计与数码绘画使建筑环境的展示多维化、壁画创作的意识形态化、材料质地的美感效应化，而且，这些均可在计算机上进行整合协调，互换重构，既可以激发创作灵感，深化和优化创作主题，同时也可以提高创作的效率和精度。

To meeting pumping unit can reach for different working environment demand, and to design various different models that ask to be able to at the same time accomplish convenient shortcut pumping unit meet the demand of now, select " the parameter of the walking beam pumping unit ", carry out parameter for pumping unit for research subject, design has greater meaning .

所以为了使抽油机在不同工作环境下能够达到良好的运行要求，并能方便快捷地设计各种不同型号的抽油机以适应目前的需求，选择"游梁式抽油机的参数化设计"为研究课题对抽油机进行柔性设计具有较大的实际意义，本文介绍了以三维参数化设计平台对抽油机进行参数化设计的方法。

In this paper, the effect of sugar and sodium alginate on microwave puffed wax gourd according to the index of puffing ratio was studied.

对冬瓜块进行微波膨化，探讨了不同的糖制浓度和涂胶工艺对产品膨化率的影响，结果表明，糖制浓度5%、海藻酸钠浓度0.6%时产品具有较好的膨化度。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。