查询词典 organic chemistry

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。

Chemistry detects make clear, the main contaminant in sewage of a pond is phenol kind with phthalein acerbity fat kind material, and in 2 ponds sewage all not check gives organic contaminant.

化学检测表明，1号塘污水中的主要污染物为苯酚类和酞酸脂类物质，而2号塘污水中均未检出有机污染物。

Graduates will focus on each of three fields: analytical, organic, and physical chemistry.

毕业生将集中于三个领域的每一个：分析，有机和物理化学。

Dung of cake, chicken, commodity date of organic fertilizer Ⅰ deserves to apply with chemical fertilizer respectively, the moderate of content of composition of tobacco leaf chemistry that production gives, candy / alkaline ratio, Potassium / chloric ratio is more harmonious, can improve tobacco leaf aroma to pledge apparently, increase tobacco leaf aroma to measure, scale of medium tobacco leaf rises on, increase tobacco leaf production value.

饼肥、鸡粪、商品有机肥Ⅰ号分别和化肥配施，生产出的烟叶化学成分含量适中，糖/碱比值、钾/氯比值比较协调，可明显改善烟叶香气质，增加烟叶香气量，上中等烟叶比例提高，增加烟叶产值。

The clinical application of technetium in nuclear medicine will parallel with the development of technetium chemistry in organic-analytical-medical- and biochemistry, and it is likely that useful new Tc-99m radiopharmaceuticals will rapidly make world-wide progress in the future years.

未来鎝-99m在核子医学临床上的应用将并行於鎝化学在有机化学、分析化学、医学化学及生物化学的发展。同时，新的、有实用性的鎝-99放射药物将在世界各地继续研究发展。

This paper is a generalization and summation of some new progress in marine chemistry in the recent decade. The principal contents consist of seven parts:1. Oceanological survey. The oceanological survey covered the China Seas, the Pacific Ocean and the Antarctic Ocean.2. Interaction of minor elements and suspended matter in seawater and the theory of in-terfacial stepwise ion/coordination partical exchange.3. Effect of organic matters on the liquid-solid interfacial exchange and the rule of left-righ...

本文对近十年来海洋化学的若干新进展作了总结，主要包括下述7方面：(1)海洋调查，包括中国近海、太平洋和南极等；(2)海水中微量元素-固体粒子的相互作用和界面分级离子/配位子交换理论；(3)有机物对液-固界面交换的影响和S-型曲线左右移动规律；(4)海水化学模型发展的三个新趋势；(5)海水中金属的络合容量和金属-天然有机配位体络合物的条件稳定常数；(6)海洋有机化学和海洋生物化学；(7)结论，对海洋化学发展的四个特点作了分析和讨论。

The Clean Energy project uses computational chemistry and the willingness of the people to look for the best molecules to fulfill these roles: organic photovoltaics for producing unexpensive solar cells, polymers for membranes to be used in fuel cells, how to assemble them?

清洁能源项目，借助于计算化学和志愿者，来寻找最佳的分子以实现这些：用有机光电池来生产价格低廉的太阳能电池，用聚合物薄膜制造燃料电池……但是该如何装配他们呢？

Molasses and alcohol wastewater was one of the high concentration unwieldiness organic liquid. There are many nutriments which were favor to growth of microorganism in wastewater. It was fit for using bio-chemistry treat-method.

糖蜜酒精废液属于高浓度难处理有机废液，废液中含有多种有利于微生物生长的营养物质，废液可生化性高，适于用生化法处理。

All the compounds were isolated and identified from the bituminous coals for the first time, bis(2-ethylheptyl) terephthalate and 18-ethyl-17-(hexan-2\'-yl) docosanoic acid are new compounds.Further more, a Colourless Oil Liquid, a white acerate crystals containing some alkanes, a white tabular crystals consisting of some fatty acid esters and a white powder crystals in which some fatty acids exist were isolated and analysed by GC/MS for the first time.Through this research, a study method of"classification extract of bituminous coal- separation with silica-gel and gelatin column chromatographies- identification of the isolated compounds by FTIR, GC/MS, LC/MS, 1H NMR and 13C NMR analyses"was established and proved to be a practical approach toward separable and non-destructive identification of some organic compounds in bituminous coals for coal chemistry research.

本研究建立了&原煤分级萃取-硅胶与凝胶柱层析分离与纯化-GC/MS或LC/MS检测-FTIR、MS、1H NMR和13C NMR波谱解析&这一煤中有机化学成分的非破坏性分离与分析的研究方法，并验证该研究方法有效可行。

The asymmetric allylation of aldehydes is one of the most important methods for preparation of chiral homoallylic alcohol, which is the building block in organic synthesis of fine chemistry and drugs.

手性烯丙基醇是一类重要医药中间体，合成手性烯丙基醇的常见方法是醛的不对称烯丙基化反应。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。