化学过程

The vitamins have no energy value; most of them seem to act as coenzymes for essential chemical changes in the body, each one influencing a number of vital processes.

维生素不是一种能量物质，多数是作为辅酶或机体必需化学物质存在，每一种都可以影响一系列重要的机体内生化过程。

We note from the further studies that in the crystals, which sharing the similar crystal structures and coordinational environments, the magnitude of the Stokes shift of the luminescence of the dopant ion is in line with the average covalency of the replaced lattice site. This is because that the nature of Stokes shift is the energy transfer from the luminescent ion to the host lattice. The value of this energy is determined by the frequency of the host lattice in which the frequency is controlled by the chemical bond characters.

更深入的研究发现，在晶体结构和中心离子配位环境非常相似的系列晶体中，掺杂离子发射光的Stokes位移值与其所取代格位的平均共价性成正比的关系，这是由于Stokes位移的本质是发光离子在发光过程中向基质以光波辐射的形式传递能量，这一能量的大小是由基质的振动频率决定的，而基质的化学键性质恰恰决定着基质的振动频率。

Based on the changes in the spectrum characters of guest molecules producedthrough inclusion complex formation with cyclodextrins, we have carried out two aspects of investigation:First, the mechanisms for the host-guest recognition reactions have been studied, such as the interactions between 3-CD and curcumin, the main constituent of the rhizomes of the plant Curcuma longa, the recognition of p-CD towards rubidate, the effective component of the Chinese traditional medicine madder, and the reactions of p-CD towards the antileprotic drug dapsone and the antiinflammatory drug nabumetone: The formation of supramolecular complex between P-CD and guest molecule has been discussed and verified in virtue of multitudinous means such asultraviolet-visible absorption, fluorescence emission, infrared spectrogram and so on. The influence of addition of linear alcohols on the supramolecular system has been studied and the reason why the noncovalent interactions in the three-component system could result in a decrease in the apparent association constant of the inclusion complex has been revealed.

本论文基于环糊精对被包结客体光谱性质的改变，开展了两大方面的研究：β-环糊精对姜黄属植物根茎主要成分—姜黄素、中药茜草有效成分—茜草双酯、抗麻风药物氨苯砜及抗炎药物萘丁美酮的主-客体识别反应机制研究：借助超分子包合物的紫外吸收光谱、荧光光谱或红外吸收光谱等手段，通过多种方法探讨并验证了超分子包合物的形成；研究了直链醇的加入对超分子体系的影响，揭示了三元体系中非共价相互作用导致超分子包合物表观结合常数降低的原因：对超分子包结反应进行了热动力学研究，探讨了各热动力学参数的变化趋势并从熵焓互补的角度考察了超分子包结过程；通过荧光猝灭实验进一步揭示了水相中β-环糊精增敏客体荧光的本质原因，从而为超分子化学提供新的理论和研究方法。

As the material penetrates into the surface and the chemical reaction starts you are already on your way to a hardened, densified, dust proofed floor. This process will continue for several months.

当材料渗入混凝土里面并与混凝土各种成分发生化学反应时，您已经离拥有一个硬化、致密、防尘的优质工业地坪不远了，这个过程将会持续几个月。

The basis of this method is that the temperature variation of an etchant film is induced by the absorption or release of chemical heat during the startup of the reaction.

该方法的实质是利用反应启动时必然有化学热吸收或释放，从而引起材料表面液层温度变化这一特点，通过红外热像实时监测系统，采集液层温度变化过程的红外热像，从而判断反应启动时长。

Pollutants from such agricultural sources as farms, pastures, feedlots, and ranches contribute animal wastes, agricultural chemicals, and sediment from erosion.

牧草场、饲育场和大农场等农业源头的污染物有动物粪便、农业化学制品以及腐蚀过程中产生的沉淀物。

And the traditional business card printing and membership card program, digital business card printing and membership card-making has been omitted from the final digital file from the business card printing and membership card during membership card before the operation, you do not need film, imagesetters, printer or chemical imaging, no waste, and no need for business card printing and membership card before control electronic documents and on the final product is not plausible adjustment.

与传统制卡和会员卡制作程序不同，数字制卡和会员卡制作中省略了从数字化文件到最终制卡和会员卡制作过程中的会员卡制作前各项操作，不需要胶片、照排机、晒版机或化学成像，没有浪费。并且无须在制卡和会员卡制作前对照电子文件及对最终产品进行排版调整。

This paper studies the measurement of potassium content in DEB powder of hot battery by using the air C 2H 2 flame atom obsorption spectrum, and introduces the optimum measuring condition and disturbing factor.

引言在某低空防空导弹的热电池的研制过程中，已经发现DEB粉结构和化学成分对电池性能有明显的作用。

Experimental results indicate: At zero electromagnetic field the light of transverse flow of two modules of COIL without any polarizing elements is partially polarized if the resonator configuration is a foldaway stable cavity, moreover, the degree of polarization decreases gradually in the course of radiation.

实验结果表明：在腔内没有任何偏振选择器件和不加外部电磁场的情况下，采用折叠式稳定腔的横流双模块氧碘化学激光光束呈现部分偏振性质，而且在出光过程中偏振度逐渐降低。

The photocatalytic processes and the production of intermediates and by-products are examined by means of UV-vis spectra, proton-NMR profile, trapping ESR technique, GS-MS, Ion Chromatography,ξ-potential measurements, peroxide measurements and chemical oxygen demand measurements, etc. Some surprising fruitions are acquired for the first time.

借助紫外可见波谱、核磁、自旋捕捉ESR、色质联用、离子色谱、ξ-电位仪、过氧化物以及化学需氧量的测量等技术，对光催化过程及中间产物和付产物的生成进行了检测，获得了一些显著的成果。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。