轭

METHODS: Based on the antitumor activity and structural feature of 8-chloroadenosine and retinoic acid, modifications were made at positions 5′ and 8,substituted cinnamoyl and benzoyl groups were bound at 8 position through amido and ester bonds, sulfonation and nitrosation at 5′-OH and its direct chlorination were conducted.

对腺苷的8位和8-Cl-腺苷的糖环羟基进行了结构改造，以酰胺键和酯键在腺苷的8位连接了具共轭基团的肉桂酰基和苯甲酰基，得到腺苷的维甲类似物；对8-Cl-腺苷的5′-羟基进行了甲磺酰化，硝基化以及氯代反应，得到了它的衍生物。

These two electrochemical reactions happens in one polymer macromolecule, which can not only improve the structure of aminoanthraquinone polymer, but also provides a better electrochemical activity.

这两种过程在共轭体系中的同一分子单元中发生，不但使氨基蒽醌聚合物的结构得到优化，还使其具有很高的电活性，使其在能量存储和电催化等方面表现出优异的性能。

By raising a query on women's role in the traditional marriage,the former reveals a reality that is in the blind spot of the androcentric society.By focusing with men's preoccupation on women's physical beauty,the latter reflects the carnal nature of men's love and their disregard for women's spiritual needs.

她的第一部长篇小说《困惑》(1890)是美国最早一部大胆触及离婚问题的小说，她在杂志上陆续发表的短篇小说分别结集为《牛轭湖的人们》(1894)和《阿卡狄之夜》(1897)。

Such common ingredients are: Alpha Lipoic Acid Prevents cellular damage, reduces oxidative stress, lowers blood sugar Increases energy levels Powerful insulin potentiator Banana leaf extract Balances blood sugar levels Transports blood sugar into the cells and aids in controlling carbohydrate cravings Cayenne Raises the body's metabolic rate Citrus Aurantium A highly effective calorie and fat burner Helps to burn fat, and does not affect the central nervous system Increases energy levels CLA - Conjugated Linoleic Acid An important fatty acid that has been shown to reduce the body's ability to store fat and increase the body's use of fat for energy.

这种共同的成分是：阿尔法硫辛酸防止细胞损伤，可减少氧化应激，降低血糖上升能级强大胰岛素增效香蕉叶提取结余血糖运输机血糖进入细胞和艾滋病控制碳水化合物情怀卡宴提高人体的代谢率柑橘枳壳高效卡路里和脂肪燃烧有助脂肪燃烧，而且并不影响中枢神经系统增加能量水平CLA的共轭亚油酸重要脂肪酸已经初显成效，降低身体的免疫能力来储存脂肪，增加人体的使用脂肪作为能源。

Based on the geometric deformation, finite element and false structure methods,this paper analyses and deduces the calculating method for the critical strength of the strut -type axile pressure members.

本文利用几何变形协调、有限元和其轭法对具有撑杆轴压构件屈曲的数值计算方法进行了理论分析和推导。所建立的计算方法概念清楚，使用方便，这为进一步进行撑杆式预应力钢管混凝土轴压构件屈曲分析建立了理论依据

In the same time, a number of barbituric acid derivatives have been designed. The relations of structure-properties was studied by connecting anthraquinone, benzene and furan.

并以1H-NMR，FTIR，UV-vis，Mass进行了表征，确定了其结构，另外设计了几种巴比妥酸衍生物分子，通过在巴比妥酸衍生物中引入萘、苯以及芳香杂环等不同的共轭桥，研究了结构性能关系。

It is shown that the first hyperpolarizability β of barbituric acid deviratives strongly depends on the donor structure and the length of conjugate chain, but is not sensitive to the acceptor structure. The HOMO-LUMO calculations reveal that the first hyperpolarizabilities of barbituric acid deviratives are linear to the HOMO-LUMO energy gap △E.

研究结果表明，给体结构与共轭链长度对第一超极化率β影响较大，而受体结构对分子第一超极化率的影响很小，并且分子第一超极化率与分子前线轨道HOMO与LUMO的能级差△E呈较好的线性关系。

The UV-Vis spectra of the super -π-conjugation compounds havesignificant changes between DMF solution and heptane solution, that is, themain bands have a stronger bathochromic shift in DMF.

研究了该超级-π-共轭体系的电子光谱的特征，它们在DMF溶液和正庚烷溶液中的紫外可见光谱有明显的变化，与正庚烷溶液相比，在DMF溶液中的主要吸收谱带有较大的红移。

By comparing the influence of the solvent polarity, in the fluorescence experiment, for PTCP and PPCP, the bathochromic shifts are attributed to the locally excited process.

通过考察溶剂极性对该类D-π-A分子光物理性能(来源：A28BC论a5文网www.abclunwen.com)的影响，发现当共轭体系较小时，PTCP和PPCP发射的是本体荧光，即源于局部激发态LE态。

The benezoxazolocoumarin dyes substituted with methyl or chlorine on 5'-position showed bathochromic shift of the maximum absorption and fluorescence emission.

香豆素类荧光染料在5'-位有取代基可使最大可见吸收波长和荧光发射波长产生红移；当共轭双键长度增加，可使染料颜色变深(Ⅴ：544，Ⅵ：552)。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！