水分子

The relationship between the structure and the performance of polycarboxylate superplasticizer was analyzed. The respective function of the structure unit of principal and branched chain was discussed. And the progress of synthesis and molecular structure design of polycarboxylate superplasticizer was reviewed according to the difference in the structure unit of principal chain.

分析了聚羧酸系高效减水剂的结构与性能之间的关系，探讨了减水剂分子的主链结构单元与支链结构单元的功能与作用，并分类介绍了聚羧酸系的分子结构设计及其合成的研究与进展。

This is due to the large amount of water, the polymer has a high degree of branching structure, adding a small amount of water so that they can support each other elements of the polymer condensation to form larger, supporting a higher degree of macromolecules, Generate up to form a mesh structure on the gel.

这是由于水用量较大时，聚合物已经呈现较高支化度的结构，少量水的加入就可以使这些支化的聚合物分子相互缩聚形成更大、支化度更高的大分子，直到生成网状结构时就形成凝胶。

The memory effect of water magnetization may be maintained by the stable 3-molecule group structure of water.

水的稳定的3―分子集团结构可以维持水对磁化效应的记忆。

The surface activity dose joins the queen, since jointly there is the water loving base group in the surface activity dose and detest the water base group in molecular structure , the pole is as a result easy to wind notable lessening menstruum surface tension from inside transition to interface in the solution.

液体分子在和空气等接触的表面会形成一层特殊的结构，表现为表面张力或表面能。表面活性剂加入后，由于表面活性剂分子结构中合有亲水基团和憎水基团，因而在溶液中极易从内部跃迁到界面上显著降低溶剂的表面张力。

Some molecules, like water and fat, are better absorbers of microwaves than others.

是的。某些分子，比如水和脂肪，比其他的分子吸收微波的能力强。

Molecular Formula and Molecular Weight : C27H32O14; 580.53Melting Point and solubility: When crystallized from water ,it contains 6 to 8 mol H2O, mp 83℃. After drying at 110℃ to constant weight, it contains 2 mol H2O, mp 171℃. Sol in methanol,alcohol, acetone, warm acetic acid,dil alkali and hot water.

熔点及溶解度：纯品柚皮甙中结晶水的含量及其熔点因结晶和干燥方法而异，以水作溶剂结晶所得柚皮甙分子中含6～8个结晶水，熔点83℃；而在110℃下干燥至恒重后得到的柚皮苷分子含有2个结晶水，其熔点升至171℃。

In order to find screening rules suitable for lead compounds of pesticide,five descriptors:logarithm of partition coefficient of octanol/water,relative molar weight,number of hydrogen-bond donors,number of hydrogen-bond acceptors,polar surface areaand carcinogenic and mutagenic toxicities of 242 fungicides,512 herbicides and 399 insecticides were calculated and analyzed.

为了寻找适合于农药的先导筛选规则，对242个杀菌剂、512个除草剂和399个杀虫剂的5个描述符：疏水常数、相对分子质量、氢键给体数、氢键受体数、分子极性表面积和毒性进行了计算和分析，提出了杀菌剂、除草剂和杀虫剂先导化合物的筛选规则。

Two outstanding fusants SR-7 and SR-T19 were chose out in the fusion group 90-11×FR-008, the former produces not only antibiotics the parents produced but also a new antibiotic effective gainst a wide range of both gram positive and negative bacteria, which the parents could not produce, and its product of the 37℃ fermentation was very effective against the cotton seedling damping off caused by Rhizoctonia sonali while product of the 26℃ was effective agaist the bacterial rots of turnip and Chinese cabbage; the latter have a much stronger activity against a wide range of fungi and yeasts than the parents.

在90-11×FR-008融合组合中，筛选获得2个优良融合子SR-7和SR-T19，前者除产生亲本产生的抗生素外，还产生亲本不产生的一种新的具有广谱抗细菌活性的碱性水溶性抗生素，防病试验表明，其37℃发酵产物对棉花苗期立枯病具有良好的防治效果，28℃发酵产物对萝卜和大白菜具有明显的防腐作用；后者与亲本FR-008的抗菌谱完全一致，但其活性强度都超过了FR-008；采用RAPD分子标记技术检测了SR-7和SR-T19与亲本的同源性及彼此间的差异，从而首次直接从DNA分子水平上验证了链霉菌的原生质体融合子及其遗传重组的多样性。

When purify carries the suspension colloid grain of negative electric charge in natural raw water, it is OK that its element linear grows the positive electrical charge that contains in catenary to be opposite remove electric sex to counteract the double function that reachs adsorption to bridge at the same time, and water-solubility of starch of this kind of modified is good, burnt viscosity is stable, cast impose kind agile, it is a kind of function exceedingly good organic, inorganic and compound high polymer garrulous coagulates agent.

在去除天然原水中带负电荷的悬浮胶体颗粒时，其分子线性长链中所带有的正电荷对可以同时起到电性中和及吸附(物质表面吸住周围介质中的分子或离子现象)架桥的双重功能，而且这种改性淀粉水溶性好，糊粘度稳定，投加方式灵活，是一种性能优异的有机-无机复合高分子絮凝(使液体中悬浮微粒集聚变大或形成絮团，从而加快粒子聚沉，达到固-液分离的过程)剂。

Fluorescence studies reveal that the self-coiling tendency of organic molecular driven by HLI strongly depends on the length of the chain and the donor and acceptor moieties linked by methylene chains approach each other because of the self-coiling to induce the fluorescence quenching and form the intramolecular exciplex or radical-ion pairs.

结果表明，在一定极性的溶剂体系中，具有一定碳链长度的有机分子在疏水亲脂作用的驱动下能够产生自卷现象，从而使长链两端的电子给体和电子受体相互靠近，发生电子转移，造成有机分子的荧光淬灭。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。