查询词典 molecule

Bioorganic chemistry is a new discipline emerging from the interaction of biology and organic chemistry especially in the field to study the binding of a small molecule to the protein that results in a perturbation of function, either inhibition or activation.

生物有机化学是生物学和有机化学相互交叉发展起来的新领域，特别是小分子与蛋白结合后引起蛋白功能变化的研究如抑制作用和活化。

The interaction between CaA and Cu and influence of ethylenediaminetetraacetic acid,solvent and pH on the interaction were also studied to help elucidate the detailed prooxidant mechanism using UV-visible spectroscopy, demonstrating that it is CaA phenolate anion,instead of the parent molecule,chelates with Cu as a bidentate ligand,hence facilitating intramolecular electron transfer between CaA and Cu.

可见分光光度计研究了CaA和Cu的相互作用以及EDTA、溶剂、pH对这种相互作用的影响，证实了CaA本身没有与Cu螯合，而是咖啡酸酚氧负离子作为双齿配体与Cu进行螯合，形成的络合物有利于分子内电子转移。

The highest occupied molecular orbital and lowest unoccupied molecular orbital of Alq3 band are located on the phenoxide site and pyridrl site on Alq3 molecule, respectively.

在Alq3 的电子结构中，它的最高电子占据态以及最低电子位占据态分别坐落於 phenoxide 和pyridrl 上。

These results suggested that proper groups at 5-position on phenyl ring of sulfonylurea molecule might possess high herbicidal activity.

结果表明，在磺酰脲类分子苯环5位上进行结构改造，有可能得到高活性的化合物。

The most parts of thesis as follows:1. Five symmetrical intra-molecular charge transfer oligomeric phenylene vinylene light emitting materials were designed and synthesized using oligomeric phenylene vinylene as a framework.2. The structures of target molecule were characterized by ~1HNMR,~(13)CNMR, IR, MS and element analysis.3. In order to study the influence of the location and numbers of electron-donor and electron-acceptor on their photoelectric performance by changing length of OPV chain, the UV spectra and fluorescence spectra of target compounds has been compared. We have researched into main factors effecting on material emitting red-shift; organic electroluminescence device was prepared using the compound P4. The capability of eletroluminescence was researched.4. The photoelectric properties of P4 was explained by quantum chemical calculation (the Gaussian 98 quantum chemistry program). It is greatly contributed know the whole process of charge transfer to guide the design of red emitters.

本文研究的内容主要包括以下部分：(1)设计并合成5个对称的以齐聚苯乙烯类为骨架的分子内电荷转移型齐聚苯乙烯类发光材料；(2)通过IR，MS，~1H-NMR，~(13)C-NMR和元素分析对所合成的目标化合物进行表征；(3)通过对目标化合物的紫外光谱和荧光光谱比较分析，研究改变OPV的长度，电子给体和电子受体的位置及数量对其光电性能的影响，探讨材料发射红移的主要因素；选取性能良好的目标化合物P4制备成OELD器件，对其电致发光性能进行研究；(4)运用Gaussian98量子化学程序包，采用量子化学方法对目标化合物P4的光电性能从理论加以解释，进一步认识荷移跃迁的整个过程，为红光材料的设计加以指导。

In the body, creatine is changed into a molecule called 'phosphocreatine' which serves as a storage reservoir for quick energy.

在体内，肌酸转为分子称为'磷酸的贮存库作为快速能量。

Oxygen as a triplet molecule is able to quench efficiently the fluorescence and phosphorescence of certain luminophores.

氧作为一种三价分子能够有效地淬灭荧光和某些发光体的磷光。

Simplistically, the PC molecule consists of a head-group (phosphoryl- choline), a middle piece, and two tails.

简单的说，PC分子包括一个头部，一个中间体，两个尾部。

Phosphoryl oligopeptides having extended construction, increasing molecular flexibility and smaller spatial hindrance could contract the protein configuration in solution, and the contractive protein molecule integrated with the smaller phosphoryl oligopeptide molecules more easily.

分子结构较为伸展、分子柔顺性好、空间位阻较小的磷酰化小肽更容易使蛋白在溶液中的构象趋于收缩，而构象较为收缩的蛋白分子更易结合空间位阻较小的磷酰化小肽分子。

The TiO2 synthesized by normal and reverse micelles as templated were applied for phot ocatalytic of Rhodamine B and organic toxic small molecule 2.4-dichlorophenol under ultraviolet irradiation. Oxidation species and photodegradation products in the photoreaction process were detected for studying their photocatalyst properties. The results showed that: the R-TiO2 had a better photocatalysis property under UV irradiation when photodegradation of RhB and DCP compared to the N-TiO2. After 160min, the mineralized rate of RhB can be 95%. And the oxidative species was mainly referred to OH radical.

利用正相和反相胶束介质模板制备的纳米TiO2为光催化剂，在紫外光照射下，对染料罗丹明B和有机有毒无色小分子2，4-二氯苯酚进行光催化降解，研究了其光催化性能，并对光催化过程中氧化物种及降解产物进行了跟踪测定，结果表明，反相胶束模板体系制备的纳米TiO2与正相胶束介质制备的纳米TiO2比较，在紫外照射下对RhB及DCP的降解有较好的光催化性能，对RhB在160min尤催化矿化率可达95%，光催化反应主要的氧化物种涉及在基自由基。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷