hydrogen bond

A quantum chemistry study on the influence of hydrogen bond on the acidity of maleic acid and fumaric acid

氢键对马来酸、富马酸酸度影响的量子化研究

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By means of the equation the formulas for calculating the enthalpy and entropy change of the hydrogen bond dissociation have been established.

本文还进一步从导出的热力学方程出发，建立了计算氢键解离热焓和熵变化的公式。

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At 0.9, 1.0 and 1.1 g/ cm3, the tetrahedral arrangement of hydrogen bond is gradually constructed by oxygen atoms with decreasing temperature.

在密度为0.9,1.0和1.1g/cm~3时，随温度降低，在氢键的作用下，氧原子之间慢慢形成四面体结构。

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It implied that the hydrogen bond played an important role in depressing the energy of reaction.

其中氢键在降低反应的活化能方面起了重要的作用.

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The second one is abasic question as to whether organic fluorine can form a hydrogen bond.

另一个研究热点是一个基础性的问题，是关于有机氟是否能形成氢键问题的研究。

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Results One MH was entrapped by two MAAs in methanol through hydrogen bond.

结果表明在甲醇中1个抑芽丹与2个甲基丙烯酸通过氢键形成复合物.

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In MR-LDHs, interlayer guest adopt-layer arrangement and effect with host through electrostatic force and hydrogen bond.

插层结构体系中存在主体 - 客体 、 客体 - 客体的相互作用,其中甲基红阴离子通过静电力和氢键与LDHs层板相互作用,在层间呈双层排列.

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Michael Addition Reaction of Thiophenol with Intramolecular Hydrogen Bond in Aqueous Medium

含分子内氢键的苯硫酚在水相中的Michael加成反应

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It was believed that substantially crosslink reaction substituted hydrogen bond for crosslink bond continually.

交联反应的实质就是不断以交联键取代淀粉分子内的氢键。

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The Strong or Weak Influence of Hydrogen Bond on Acidness of Organic Compounds

氢键对有机化合物酸性强弱的影响

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These properties are due to a unique kind of a bond known as the hydrogen bond.

这些特性的存在是由于一种独特的结合力,即人们所知道的氢键.

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The FT-IR analysis shows that the two resins occur to cross-linking reaction and hydrogen bond interaction.

通过FT IR分析可知，两种树脂之间发生自交联反应，两者之间存在氢键作用。

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So, this phenomenon also indicated that the intermolecular hydrogen bond was important for resonance enhancement.

因而, 这个现象也正好表明分子间氢键的形成对于共振增强是重要的.

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The mainly report is based on the model of HAc-furan in order to study the effect of multi-ions of metal on the hydrogen bond eventually weaken hydrogen bond of the thick oil.

以下主要以乙酸-呋喃为模型，探讨含铁离子催化剂对氢键的影响，实现削弱氢键的可能性。

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There is no enough hydrogen bond for sepiolite so treatment is needed to improve the strength and permeance property of the filter paper.

不过海泡石缺少形成氢键的基团，需要对其进行处理来提高滤纸的强度和透过性能。

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The results showed the interface interaction of coupling agents and HMX may be hydrogen bond essentially. The analytical resits of ESCA was in good correlation with the performance of solid propellants containing the Coupling agents.

实验结果表明：偶联剂与HMX间的界面作用的实质是氢键等次价键力，ESCA分析结果与偶联剂在固体推进剂中的使用效果有较好的对应关系。

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A variety of experimental phenomena in this research can be satisfactorily explained by the theory of polymeric ions, hydrogen bond and electrolytical solution.

运用铝酸钠溶液的聚合离子说、氢键理论以及电解质溶液理论等可以较好地解释本实验中的许多实验现象。

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The active area of ENOLASE will potentially exist multi-hydrogen bond of donor and acceptor.

ENOLASE烯醇酶活性中心存在多个潜在的氢键给体和受体.

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A theoretical approach to the hydrogen bond strength distribution in polyurethanes

对聚氨酯中氢键强度分布的理论探讨

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The thixotropic mechanism of unsaturated polyester resin was investigated, and it was concluded that the thixotropy of unsaturated polyester resin was mainly determined by the force of hydrogen bond between the thixotropic agent and the unsaturated polyester resin.

本文探讨了不饱和聚酯树脂触变机理，认为不饱和聚酯树脂的触变性，主要是由触变剂与不饱和聚酯树脂间的氢键力决定的。

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The energy of the hydrogen bond is largely electrostatic in origin.

氢键的能量从本质上说主要是静电.

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Nano-particles of SiO2 form the hydrogen bond with carbonyl of PI, which changes the geometrical and electronic structure of PI, but the bond order changes a little.

SiO2纳米颗粒与PI上的羰基形成氢键，使得PI的几何结构和电子结构发生了变化，但键级基本没有变化。

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The bonding models of large π bond, hydrogen bond, HOMO and LUMO are discussed.

讨论了大π键, 氢键, 最高占据轨道及最低空轨道的成键图像.

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Hydrogen bond interaction exists in the blends.

共混物中POM与 COPA分子间存在氢键作用.

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Hydrogen-bond states on cellobiohydrolase ⅱ ( CBH ⅱ) of trichoderma viride were analysed by laser Raman spectroscopic method used to reveal molecular normal modes of vibration character.

运用能够揭示蛋白质分子基团振动特征的激光拉曼光谱分析技术，对绿色木霉纤维素酶中的CBHⅡ在固态以及两种pH值的液态中酶分子内的氢键状态进行了分析。

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There are many factors to affect the strong or weak of acidness of organic compounds. The paper expresses the strong or weak influence of Hydrogen bond on acidness of organic compounds in detail.

影响有机化合物酸性强弱的因素很多，本文仅以氢键对有机化合物酸性强弱的影响作了祥细的分析。

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Molecular model of the hydrogen bond has been weakened; the addition of metal ion catalyst effect of viscosity reduction can be achieved.

分子模型中的氢键受到了削弱，因此加入金属离子催化剂可以达到降黏的效果。

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It can be deduced that the enrichment of starch microspheres to ascorbic acid depends mostly on association reaction of hydrogen bond between hydroxyls and amidos of starch microspheres and hydroxyls of ascorbic acid after contrasting the oxidation features of ascorbic acid when using various electrodes.

通过比较不同工作电极作用下抗坏血酸的氧化特征，可以推论淀粉微球对抗坏血酸的富集作用更多的依赖于微球结构中的-OH、-NH2与抗坏血酸分子中-OH之间的氢键缔合作用。

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Results suggested that the four-membered ring of nopyl acetate cleaved first, then hydrated. Other products were mainly obtained from epoxidation of the double bond, and further oxidation of tertiary hydrogen on C_ (-1) and C_ (-5).

对反应产物的分析结果表明：反应主要是四元环开裂，并进一步水合，另外伴有少量双键环氧化的产物，这些环氧化的产物还可进一步在C-1和C-5处发生叔氢氧化。

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In the extrusion process, the hydrophobic interaction, disulfide linkage, hydrophobic interactions and disulfide bond and hydrogen bond are the main force in keeping the protein structure.

在挤压过程中，疏水相互作用、二硫键、疏水键与二硫键的交互作用以及氢键是维持纤维化大豆蛋白结构的主要构象力。

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