活化能

Methods for Morphometry and Analysis of Gastropod Shells;2. In this paper,calcination characteristics and desulfurization property of several kinds of shells are studied by using thermogravimetic analysis methods.

采用热分析方法对几种贝壳的煅烧特性和固硫特性进行实验研究，在理论分析和实验研究的基础上得到贝壳煅烧反应的动力学模型，并求出表观活化能，结果表明贝壳的表观活化能比石灰石小约 10 0kJ·mol-1。

The mechanical equations during to different combustion periods and the corresponding kinetics parameter E were calculated by integral method (Coats-Redfern), which indicated that the value of aviation energy was relevant with the combustion period.

采用积分法(Coats-Redfern方程)计算得到各阶段燃烧反应的机理方程及相应的动力学参数活化能E，表明活化能值的大小与试样的燃烧阶段是对应的。

We also prove the degrading mechanism is independent of the effect of parasitical resistance and explain the change of the threshold voltage and mobility by activation energy extraction under mechanical strain.

我们也做了处於挠曲状态下寄生电阻与活化能的参数萃取分析，证明了应力挠曲所造成的劣化效应与寄生电阻无关以及从活化能的改变上进一步地解释了电子迁移率和临界电压的劣化情形。

The reaction mechanism of thione-thiol tautomerism for 2,6-dithiopurine obtained from proton transfer has been investigated by DFT B3LYP method with 6-311＋G basis set. The reaction enthalpies, activation energies, activation free energies and the rate constants of tautomerism were obtained.

采用密度泛函B3LYP方法，在6-311＋G基组水平上对2，6-二巯基嘌呤质子转移引起的硫醇式与硫酮式互变异构反应进行了计算研究，获得了互变异构过程的反应焓、活化能、活化吉布斯自由能和质子转移反应的速率常数等性质。

In the first part, it was investigated the interaction between Pb2+ and La4Ti9O24 ceramic bulk. The result shows that a significant Pb2+ diffusion into La4Ti9O24 ceramic bulk and a significant crystallization of the La2/3TiO3-type phase is clearly observed in the Pb2+ diffusion layer. The reacted zone consists of the La2/3TiO3-type phase exhibits the linear dependence of the square of the thickness, x, on the heat-treated time, t, in excellent agreement with the parabolic law x2 = kt, where k is the growth rate coefficient. The kinetic study thus indicates that the Pb2+/La4Ti9O24 interaction strictly obeys the theory of the reactive diffusion. Furthermore, the experimental k values were used to determine the associated activation energy, Ea, for the formation of La2/3TiO3-type phase using the Arrhenius plot and the following least-square equation, ln =-Ea/RT + A, where T is the annealing temperature, R is the universal gas constant, and A is a constant, resulting in Ea ~ 607 ?b 60 kJ/mol.

首先， 以巨观的方式观察PbO与La4Ti9O24陶瓷体介面的反应现象；利用X-ray绕射分析以及扫描式电子显微镜来观察不同的热处理温度以及不同的持温时间所制作的样品，研究结果发现， Pb2+离子会渗入到La4Ti9O24陶瓷内，同时在Pb2+离子所渗入的区域内会产生新的La2/3TiO3-type钙钛矿斜方晶相；藉由量测不同温度与时间之样品，其因Pb2+离子渗入而产生之La2/3TiO3-type相层厚度之关系，符合反应式扩散机制中 x2 = kt 之关系式(其中 x：扩散层厚度； k：反应速率常数； t：反应时间)；进一步将不同实验条件所得到之反应速率常数值代入Arrhenius方程式ln (k =-Ea/RT + A ，其中Ea：活化能； T：绝对温度； R：气体反应常数； A：常数，可以求得Pb2+离子与La4Ti9O24陶瓷发生反应式扩散所需之活化能为607 ± 60 kJ/mol。

The simplified peseudo-first-order kinetic model for hydrolyzation of benzal chloride was proposed according to the character of hydrolyzation reaction and the apparent reaction rate constant and activity energy was obtained. The activity energy is 17.73KJ/mol in the temperature range from 900C to 1100C and the model values and experimental values tally well.

根据水解反应的特点，提出了简化的苄叉二氯水解反应拟一级动力学模型，经参数估计，得出了水解反应的宏观反应速率常数和活化能，在900C～1100C温度范围内，反应活化能为E1＝17.73kJ/mol，模型计算值与实验值吻合较好。

The Ea for the formation of ethoxide intermediate was 170.34 kJ/mol. Alkylation of benzene with ethylene occurred through both concerted mechanism and stepwise mechanism, and they were competitive to each other. These two paths were only slightly different in the activation energy.

而乙烯作为烷基化剂与苯反应时同时存在联合机理和分步机理，且二者之间存在一定程度的竞争，其中联合机理的活化能为167.24 kJ/mol，分步机理速控步骤的活化能为155.20 kJ/mol。

The thermoinduced coloration system of fluorane/iodonium salt has been investigated. The kinatic studies of thermoinduced color development reaction in polymer film was performed. It was found that two different phenomena appeared in the relationship between reaction rate constant and temperature. A very low value of k〓(0〓mol〓·l·s〓) and very high energy of activation E〓(149 KJ·mol〓) observed in the region of low temperature, whereas a larger value of k〓(1~10 mol〓·1·s〓) and smaller energy of activation (E〓33 KJ·mol〓) displayed in the region of high temperature of 150℃.

研究了荧烷/碘鎓盐热致显色反应体系，进行了分子膜中热生色反应动力学的研究，发现热生色速度常数k〓和温度关系呈现二种不同情况：在低温区，k〓值很小（＜10〓mol·1·s），活化能很大（E〓=149KJ·mol〓）；而在高温区，k〓值较大（1~10〓mol·1·s），活化能较低（E〓=33KJ·mol〓），它们的转折点位于温度（T〓=119℃），表明高于T〓是进行热致显色反应的重要条件；考虑到它们用作热记录介质的可能，研究了熔融状态中热生色反应。

Marmatite ; pressure leaching ; iron kinetics ; reaction activation energy ; diffusion activation energy

高铁闪锌矿；加压酸浸； Fe动力学；反应活化能；扩散活化能

The transition states of the reaction between THF、 butylene oxide and secondary oxonium ion were acquired. By using frequency analysis and inner reactioncoordinate analysis the rationality of these transition states were affirmed.

分别对四氢呋喃和环氧丁烷，绘出了链增长反应的势能面曲线，得到四氢呋喃链增长反应的活化能为116.749kJ/mol；环氧丁烷链增长反应的活化能为92.672kJ/mol。

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。