查询词典 kinetics

The kinetics of the esterification process and the mechanism of the catalytic process are also discussed.

论文还对该酯化反应进行了动力学研究与催化机理探讨。来源：Ac3c3BC论文网www.abclunwen.com

The kinetics of catalytic synthesis of ethyl acetate using cation exchange membrane catalyst was studied.

摘 要：研究了以阳离子交换树脂为催化剂合成乙酸乙酯的动力学。

The globe kinetics model can be described by an exponential equation, which was fitted very well with experiment data and the error was within 7%.

结果表明，当初始pH值为7.5、反应时间为120min时，质量浓度为25mg/L的表面活性剂十二烷基苯磺酸钠的去除率为97％，且DBS降解的反应动力学模型可用幂指数方程描述，该模型计算值与试验值吻合较好，误差在7％以内。

An exponential function method for solving the point reactor neutron kinetics equations is presented.

给出了一个求解点堆中子动力学方程组的指数基函数法。

The bacteria amounts on metal surface increased according to an exponential law and its adsorption kinetics at metal surface was proposed.

给出了微生物附着的动力学方程，并对其进行了讨论。两种钝态金属开路电位的变化和其表面微生物数量增加有着相似的趋势。

On the basis of the kinetic equation of substrate reaction in the presence of urea or guanidine hydrochloride, all microscopic kinetic constants for the free enzyme and enzyme-substrate binary and ternary complexes have been determined. The results of the present studies indicate that:①In the presence of urea or guanidine hydrochloride, enzyme-substrate complexes lose their activity less rapidly than the free enzyme. Therefore, both substrates, NADPH and 7, 8-dihydrofolate, protect dihydrofolate reductase against inactivation.②The denaturation of dihydrofolate reductase by urea follows single-phase kinetics, and changes in enzyme activity and tertiary structure proceed simultaneously in the unfolding process, so it may be an"all or none"process.③The GdnHCl-induced unfolding of the dihydrofolate shows a biphasic transition, while the change in the enzyme activity is a single exponential process. The rate constant of inactivation is consistent with that of the fast conformational change. Therefore, the kinetic intermediate of protein unfolding should be a partially folded and inactive form.

我们根据在脲或盐酸胍存在下的底物反应动力学方程求得游离酶和酶底物二元、三元复合物的微观动力学常数，结果表明：①酶-底物二元、三元复合物的失活速度明显慢于游离酶，说明两个底物二氢叶酸和NADPH对酶的失活都具有一定程度的保护作用；②在脲作用下，酶的失活和构象变化均为单指数项过程，而且酶的活力丧失和三级结构变化是同时发生的，说明二氢叶酸还原酶的脲变性可能是一个"全或无"的两态过程；③在盐酸胍作用下，酶的构象变化为两相过程，而失活则是单指数项过程，酶分子构象变化的快相速度常数与失活速度常数基本一致，因此我们认为二氢叶酸还原酶的盐酸胍变性过程中存在一个没有活力、但仍具备一定空间结构的变性中间体。

Keywords Spheroidal graphite malleable;Chemical composition;Graphitization time;Kinetics equation;Regression analysis;Ferritization rate;Measuring method;Tace element

球墨可锻铸铁；化学成分；石墨化时间；动力学方程；回归分析；铁素体化率；测量方法；微量元素

Objective:To explore the significance of fibrinogen kinetics variation in the antithrombosis therapy.

目的：探讨纤维蛋白单体聚合动力学检测在抗栓治疗监测中的意义。

The relevant kinetics model was constructed based on the mass balance theory,combined with Monod equation and Fick law.

对A/O复合式生物膜工艺的缺氧段进行了深入研究，并以物料平衡理论为基础，结合莫诺方程和Fick定律，建立了相应的底物降解和微生物增殖的动力学模型。

A mathematical model of dual-frequency ultrasound extraction kinetics based on Fick's second diffusion law was established for traditional Chinese medicine.

根据Fick第二定律建立了丹参药材中的丹参酮类化合物双频复合超声强化溶剂提取过程的动力学模型。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。