查询词典 molecular

Cascades were calculated for various key relative molecular mass,which is the average relative molecular mass of two key components in a matched abundance ratio cascade.

在匹配丰度级联中，关键相对分子质量是两个关键组分相对分子质量的平均值。

heological properties at a low shear rate range(10-2-10s-1) and the glass transition temperatures for PEK-C with different moleCular weithts have been studied by using a cone/plate rheometer and DSC' The activation energy for melt flow increases with Mw The dependence of Tg on molecular weight exhibits two linear range and the value of nitersect agrees with the critical molecular weight , Mc' which is first reported for PEK-C' Mc value obtained according to η0 is about 8× 104 g/mol and the relation between Mc and temperature was dis-cussed.

用锥权流变仪及DSC的方法研究了5种不同分子量的酞侧基聚芳醚酮在低剪切速率区（10－2－10s－1）的流变行为及其分子量与玻璃化转变温度的关系。结果表明，样品的粘流活化能随分子量的增加而增大，Tg随分子量的变化是二个线性区，其交点值与所求的样品的临界分子量值相对应。利用测得的零剪切粘度值（η0）首次求得了PEK—C的临界分子量值。同时也讨论了Mc与温度及η0和Tg与分子量的关系。

Results: after one course of treatment, total effective rate of low molecular weight heparin and low molecular weight heparin combine with ginkgo bilobate extract were 80.0% and 88.9% separately,much higher than total effective rate of ginkgo bilobate extract 71.1%. the change of the blood rheology in pretherapy and post-treatmen had statistical significance. in the group of treating with low molecular weight heparin combine with ginkgo bilobate extract had the higher total effective rate and much evident change than the other groups, at the same time no bleeding tendency and other adverse reactions were found.

结果：1个疗程后低分子肝素组总有效率为80.0%、联合用药组总有效率为88.9%，明显高于银杏达莫组的71.1%，而且治疗前后血流变学的变化亦有显著性的差异，特别以联合用药组的总有效率最高和血流变学变化最明显，同时未发现出血倾向等不良反应。

But the conventional CoM FA exists some defects, including the selection of potential function of molecular field, the determination of bioactive conformers, the molecular alignment and the selection of variable of molecular fields, etc.

但传统的比较分子场分析方法在具体的实现过程中还存在着一些缺陷和不足，包括分子场势能函数的选择，活性构象的确定，分子的叠合以及分子场变量的选取等等。

In this thesis, two chemical structural models were constructed based on several structure parameters derived from FTIR and 13C NMR data, which were processed by curve-fitting and curve-resolved. Modified models were obtained by simulation oftheir molecular vibration spectra using Cerius 4.6/IR module andthe structural parameters from 13C NMR. Potential energy, bondenergy and non-bond energy of the minimum-energy conformations of coal macromolecules were calculated by molecular mechanics calculation and molecular dynamics simulation. These results demonstrate the importance of hydrogen bonding and van der Waals interactions in the formation and stabilization of coal macromolecular structure, and a strongest tendency of hydrogen bonding interactions to increase with the coal molecules but the Coulombs force.

本文运用煤结构的傅立叶红外光谱和固体核磁共振碳谱~(13C NMR测试方法所得的结果，经过谱图分峰、分析，计算出若干表征煤大分子结构参数，并综合前人的经验和共识，利用计算机分子绘图软件系统构建了表征两种褐煤的化学结构模型，在Cerius~2 4.6／IR模块中计算了分子振动红外光谱，同时结合碳谱所计算的分子结构参数拟合、修正了该结构模型，得到了能表征这两种煤样的分子结构模型，作为用分子动力学模拟和量子化学计算的初始结构模型。

Results Bulbus alkaloids easily formed molecular ions(superscript + in MS and dimerized easily in alcohol solution, which did not dimerize in acidity solution. Collision induced dissociation made these alkaloids easily lose a molecule of H2O. The MS spectra of the extracts of five Bulbu Fritillartae species indicated that the major molecular ions were similar to each other, but different varieties showed very different relative abundances of these molecular ions.

结果 在正离子一级质谱中，贝母生物碱易形成带一个正电荷的准分子离子，并且在中性醇溶液中，贝母生物碱易形成二聚体，在酸性介质中则无此现象；二级碰撞诱导解离易使贝母生物碱脱去一分子水；5种贝母对照药材的总生物碱提取液的一级电喷雾质谱图显示，主要分子离子峰基本相同，但因品种不同相对丰度差异较大。

Compared with other CMS plants, the molecular basis of CMS rice is very unclearer, especially for those having been extensively used in hybrid breeding of China. So here, a serial molecular techniques are adopted to study the molecular basis of HongLian tylp CMS rice, taking sterile line , maintainer line , and hybrid F〓 HL No.

针对国内几种大面积推广的CMS水稻分子基础研究相对比较落后的状况，本文以水稻红莲型粤泰细胞质雄性不育系A和保持系B及杂种一代F〓为材料，运用一系列分子生物学技术和方法着重研究了红莲型水稻CMS的分子基础。

Department of Ecology and Biodiversity is primarily dedicated to education and research in ecology and biodiversity including conservation biology, coral ecology, ecotoxicology, environmental microbiology, fungal biodiversity, mangrove ecology, microbiology, molecular ecology and evolution, molecular microbial ecology, molecular phylogenetics, plant pathology, plant systematics and evolution, plant-animal interactions, pollution biology, terrestrial ecology.

生态学和生物多样性学系创建于1994年，主要致力于生态学和生物多样性学的教学与研究，其研究领域包括保护生物学，珊瑚生态学，生态毒理学，环境微生物学，真菌生物多样性，红树林生态学，微生物学，分子生态学和进化，分子微生物生态学，分子系统发生学，植物病理学，植物分类学和进化，植物－动物相互关系，污染生物学，陆生生态学等。

Through the analysis of De, an alternative mechanism interpreting of the"overshoot"phenomena can be obtained: when the diffusing time of small molecular penetrants is shorter than relaxation time of the involved polymer, small molecular substance penetrates into the polymer quickly and its concentration reached a maximum, then the swelling of the polymer by the small molecules makes the chain structure of the polymer relaxed, thus the free volume in polymer matrix, which is occupied by small molecule, decreased, and will squeeze part of the small molecular substance out of the polymer, and therefore overshoot behavior can be observed.

通过对De的分析，可以得出产生&超调&现象的机理的另一种解释：小分子渗透物质的扩散时间相对于聚合物的松弛时间要短（相当于有个更快的扩散速度），所以小分子迅速扩散进聚合物中达到一个极值，由于小分子物质对聚合物的溶胀，使得聚合物链结构产生松弛，由于聚合物链结构的变化，小分子物质占有的自由体积会减小，这样会挤出小分子物质，使得小分子物质在聚合物中的浓度减小，如果高聚物粘弹性明显，甚至可能出现多个浓度的衰减振荡并达到平衡值。

The details are specified as follows:1 Prediction of KGM chain structureUsing computing molecular structure software: Hyperchem7.0 VM2.0, methods of molecular dynamics and molecular mechanics and the model of single KGM chain , polymerization degree as well as the influence of substitution group on dynamics conformation and the interaction affecting chain conformation were researched.

主要研究内容与结果如下： 1。葡甘聚糖单链高级结构的预测利用Hyperchem7.0、VM2.0分子结构计算软件采用分子动力学和分子力学的方法，以真空中葡甘聚糖单链为研究模型，研究了聚合度、取代基对动态构象的影响及影响链构象的作用力。

I use an example quoted by Hu Jiaqi:"It is reported that America separates the DNA of a kind of virus by making use of genetic technology and combines it with another kind of DNA. Finally, they get a kind of virulent biological agent called a "pyrotoxin". Someone discloses in private that 20 grams of such a kind of biological agent could result in the global death of 6 billion people due to infection."

我在这里例举胡家奇所引用过的例子："据报道，美国利用转基因技术，将一种病毒的DNA分离出来，与另外一种DNA进行结合，拼结成一种剧毒的"热毒素"生物战剂，且私下有人透露，这种生物战剂只需20克，就可以导致全球60亿人全部感染死亡。"

Waiting, for the queers and the coons and the Reds and the Jews.

等待着疯子和黑人还有红色共产主义者还有犹太人