查询词典 electron energy level

SamSung electron first will " electronic athletics " this one concept takes China, and support of your kind effort, first " SamSung electron cup " tounament of WCG China area. On November 18, 2003, athletic sports of Chinese electron athletics made item of the 99th sports of our country formally eventually.

2001年，三星电子首次将"电子竞技"这一概念带入中国，并鼎力支持，首届"三星电子杯"WCG中国区锦标赛。2003年11月18日，中国电子竞技体育运动终于正式成为了我国第99个体育项目。

According to the fluorescence quenching and the fluorescence changing of mixed solution with irradiation time it was indicated that the photo-induced electron transfer between triazine as an electron acceptor and intra-molecular charge tranfer compounds as an electron donor have occurred in these systems.

通过荧光猝灭和体系荧光随时间的变化可看到作为电子受体的三嗪分子和作为电子给体电荷转移化合物间的光诱导电荷转移作用。

When a valence electron leaves its bond to become a free electron, the hole left behind attracts a nearby electron.

例：当一个价电子离开自己的键而成为一个自由电子时，流下的空穴就吸引它附近的一个电子。

The bay area has no substituent and has electron-withdrawing groups,such as bromine atom,cyano-group and 4-formyl phenoxy group compounds have strong absorption in 525 nm,when excitated them,they have strong yellow and salmon pink luminescence bettwen 538 and 566 nm.When introduce electron-donating substituents,such as phenoxy group,morpholinyl,piperidinyl and n-butylamino group,the absorption bathochromic shift while the electron-donating ability is improved,bettwen 536 and 692 nm have strong absorption,reach to the near-infrared region. When excitated them,only the phenoxy group compound has strong salmon pink luminescence in 572 nm,the others have no fluorescence.

其中，港湾位无取代的以及含吸电基团(—Br、—CN、对甲酰基苯氧基)化合物在525 nm左右处均有很强的吸收ε＞10~4M~(-1cm~(-1)，当光激发时，港湾位无取代、溴代和氰基取代物发出538～547 nm的强烈黄色荧光，对甲酰基苯氧基取代物则发出566 nm的强烈橙红色荧光；含供电基团(苯氧基、吗啉基、哌啶基、正丁氨基)化合物随着供电子能力的增强，吸收发生红移，在536～692 nm处均有很强的吸收ε＞10~4M~(-1cm~(-1)，达到了近红外区，当光激发时，只有苯氧基取代物发出572 nm的强烈橙红色荧光，而含氮供电基取代物均发生了荧光淬灭。

The tryptophan residues play important roles in DNA photoreactivation catalyzed by CPD photolyases. We have investigated the action mechanism concerning Trp in DNA photoreactivation, and obtained the results as follows: 1 We proposed a mechanism of photosensitized splitting of CPDs by Trp and Trp-containing peptides. 2 Quantum yields of splitting of the model compounds that a Trp linked covalently a CPD were obtained under 290 nm light in various solvents, these values changing with solvent, range from 0.01 to 0.5. 3 Utilizing pulse radiolysis technique, splitting processes were observed in aqueous solution of the CPDs with hydrated electron and some oxidative species (such as hydroxyl radical, bromic radical and azide radical), and obtained their rate constants. In the case of interaction between CPD and hydrated electron, splitting of the CPD anion, and pyrimidine anion transfer an electron to FAD or Rf, were observed. The process rate was slower one order more than that in photolyase. Minor, but highly mutagenic UV-light-induced lesions are (6-4) photoproducts, which are repaired by (6-4) photolyases. These enzymes, discovered in 1993, are not well characterized and their mechanism is still under investigation.

我们研究它的作用机理，获得以下结果：1）建立了色氨酸及其肽对嘧啶二聚体光敏化裂解的直接修复作用机理模型；2）获得了色氨酸共价键连接于嘧啶二聚体的化合物在多种溶剂中290nm光辐照裂解的量子效率，其值随溶剂而变化，范围在0.01-0.5；3）运用脉冲辐解观察到嘧啶二聚体与水合电子和一些氧化性的自由基作用裂解过程，得到相应速率常数；对二聚体与水合电子作用发生裂解以及向FAD返还电子的过程进行了体外模拟；4）（6-4）光解酶的作用机理中一个关键假定是氧杂环丁烷中间体在接受电子后能自发裂解，恢复二嘧啶的结构。

The molecule has a typical D-π-A structure with terminal units of electron donor and accepter groups. The triphenylamine group, as the electron donor, is connected to the oxadiazole group which is the electron accepter through the cinnamene group.

该分子具有典型的D-π-A型推拉电子结构，三苯胺基团作为给电子基通过苯乙烯共轭链桥接到吸电子基1，3，4-恶二唑基团。

Parameters based on chemical shift indicate that methyl is a substituent with electron-withdrawing inductive effect and poor electron-donating conjugative effect. Perhaps its conjugative effect is on critical point. Methyl is electron-withdrawing for benzene relative to H. Otherwise, methyl has strong p-position and weak o-position orientation effect.

化学位移值表示的诱导效应参数表明甲基具有吸电子诱导效应，经校正后的化学位移值表示的共轭效应参数表明甲基具有微弱的给电子共轭效应，甚至其共轭效应有可能正处于给电子和吸电子的临界状态，总之相对于氢原子，甲基具有吸电子效应。

Photoinduced Electron Transfer [2+2] Cycloaddition Reactions ofBenzannelated Isoquinolin-1-ones with Electron Deficient Alkenes Photoinduced [2+2] cycloaddition reactions of 11H-benzoxazolo[3,2-b]isoquinolin-11-one 8 and 11H-benzothiazolo[3,2-b]isoquinolin-11-one 13 with electron deficient alkenessuch as acrylonitrile, methyl acrylate, dimethyl fumarate and dimethyl maleate afforded a group of polycyclic isoquinoline derivatives bearing cyclobutane moieties ingood to excellent yields and resulted in the Schenck isomerization of the alkenes.

3苯并增环异喹啉-1-酮与缺电子烯烃的光诱导电子转移[2+2]环加成反应 11H-苯并恶唑[3，2-b]异喹啉-11-酮8和11H-苯并噻唑[3，2-b]异喹啉-11-酮13与缺电子烯烃如丙烯腈，丙烯酸甲酯，富马酸二甲酯及马来酸二甲酯的光诱导[2+2]环加成反应以高产率给出一系列含有环丁烷结构单元的多环异喹啉衍生物并导致烯烃的Schenck异构化作用。

There are many merit for NBCD used in electron transfer reactions:(1) Photoactive compounds such as electron donor and acceptor could be dissolved in water, so it is possible to mimic the electron transfer in biological systems.

NBCD在电子转移反应中具有诸多优点：1。光活性有机物即电子给体、受体能够溶于水，使得模拟生物体系电子转移反应成为可能；2。

The resultsshowed that one electron was photochemically transfered from rich electron part inside the C〓 derivatives to C〓 football. On the other hand,two step PET took place between C〓 and additional electron donor Et〓N, and so C〓anion as well as C〓 dianion could be detected in C〓/ Et〓N system.

结果表明：C〓衍生物分子内的富电子部分与C〓区域间发生分子内光诱导的一步单电子转移过程，对比而言，C〓分子与外加给体Et〓N间可相继发生两步光诱导电子转移反应，依次生成C〓和C〓阴离子自由基。

Dixie itself is a nickname for the American South.

Dixie 本身是美国南部的别称。

I think John Terry epitomises that and a big reaction is what we will be looking for.

而我认为特里就是这样一个典型，他正是我们期望看到的那个领秀。