查询词典 chemistry

Physical chemistry a distinct state of matter in a system; matter that is identical in chemical composition and physical state and separated from other material by the phase boundary.

一个系统中物质的独特状态；具有相同的化学成分和物理状态并由相位临界点分开的物质。

Phase Diagram Study is an important branch in Physical Chemistry and in Applied Materials Science.

相图研究是物理化学和应用材料科学中非常重要的领域。

Chemistry Any of various substances, such as litmus or phenolphthalein, that indicate the presence, absence, or concentration of another substance or the degree of reaction between two or more substances by means of a characteristic change, especially in color.

指示剂：任何一种具有下列功能的物质，即能通过自身性质的变化，特别是颜色的变化来表明另一种物质的存在、消失或聚集，或可以表明两种以上的物质相互反应的程度；例如石蕊、酚酞

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。

This hazy "phlogiston theory," this erroneous conception of burning, led chemistry along a completely false trail

这个莫名其妙的"燃素论"，对燃烧做了错误的理解，把化学扯上了一条完全错误道路。

The progress in computational chemistry study of protein kinase A has been reviewed, including the molecular dynamics simulation study of PKA holoenzyme and its C subunit and R subunit in aqueous solution, phosphoryl transfer mechanism, the binding free energy predicting and flexible docking of C subunit with its inhibitor balanol.

本文综述了PKA在计算化学领域的研究进展，包括PKA全酶以及它的催化亚基和调节亚基在水溶液中的分子动力学模拟研究，磷酰基转移机理和C亚基与其抑制剂balanol的结合自由能预测、柔性对接。

Semiconducting TiO2 photocatalysis degradation is an important research field in physical chemistry, material science and environment science.

半导体TiO2光催化降解有机污染物是目前涉及物理化学、材料科学和环境科学等学科领域的研究热点。

It plays significant role in the processes of atmospheric physics, atmospheric chemistry, atmospheric optics, and atmospheric photochemistry.

黑碳气溶胶是气溶胶的重要组成部分，在大气物理、大气化学、大气光学、大气光化学等过程中具有重要作用。

Nanosized silverhalide itself can show a lot of special properties in chemistry and photochemistry.

纳米卤化银本身具有许多特殊的化学与光化学性能。

The induction of acylamide group can enhance the stereoselectivity of photochemistry and be used in other chemistry fields.

通过在二苯甲酮上引入酰胺羧酸类活性基团，不仅可以作为光化学前体用于提高光反应的立体选择性，而且还可直接应用于其他化学领域。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。