查询词典 mechanism

Brought forward and reasoned the forming mechanism of Maowusu sandy land. Based on the analysis of the development of Holocene rivers and related loess and windsandy geomorphology, the paper put forward the forming mechanism of Maowusu sandy land as follows: while the climate became dry, the exterior channels extended backwardly and cut through the remained lake system of ancient Hetao lake. This resulted in the rapid discharge of underground water. The vegetation living on this water resource was destroyed completely. Then the sand began to form.

对毛乌素沙地的形成机制进行了新的探索基于对过渡地带全新世河流及其相关的黄土和风沙地貌发育、土地利用变化等分析，提出毛乌素沙地的形成机制：在气候变干的同时，外流河谷溯源延伸，切穿了长城以北河套古湖残遗湖系，使地表地下水迅速外泄，原靠湖系水资源维系的生长在河套古湖湖滨沙堤形成的沙地上的非地带植被的生存条件被彻底摧毁，而起沙。

The main content of filtration theory of grainy filtering media consists of filtration mechanism,filtration equation and backwashing mechanism.

粒状滤料过滤理论的主要内容是过滤机理、过滤方程式和反冲洗机理。

In the thesis, the mechanism of pulping and bleaching of APMP of Bambusa Chungii was researched. And then we studied the properties and mechanism of light-induced yellowing of bleached APMP bamboo pulp.

本论文对粉单竹APMP法制浆和补充漂白过程中的制浆机理和漂白机理进行了比较系统的研究，并初步探讨了漂白APMP竹浆的返黄性能和机理。

Chapter 5: The fluorescence quenching reactions of barbaloin with serum albumin in solution were studied. The quenching mechanism of serum albumin by barbaloin was interpreted using the Stern-Volmer mechanism. The binding constant K values and the number of binding sites were calculated, respectively.

第五章：首次研究了芦荟甙与血清蛋白在溶液中的相互作用，利用Stern-Volmer方程解释了芦荟甙对血清蛋白的荧光淬灭，并测定了不同温度下的结合常数及结合位点数。

In the three systems, system realizes the crosslinking of PVC bases on the peroxide crosslinking mechanism, the tensile strength of crosslinked PVC has been improved somewhat, the IR spectrum of gel demonstrates that there are characteristic absorption peaks of n-alcohol that belongs to ethanol amine and benzenoid group. From the analysis of gel structure , deduces that the mechanism of crosslinking reaction: under the initiations of peroxide and high temperature, PVC yields macromolecules free radicals, at the same time , styrene"s polymerization and grafting onto PVC takes place, at last the system forms crosslinking structure through coupling between radicals; confirms that triethanol amine can absorb HC1 produced by degradation of PVC, so improves the crosslinking efficiency of peroxide, decreases the HCl"s promotion for PVC"s degradation; deduces that triethanol amine can activate the PVC macromolecules and prolong the free radicals" life-time of PVC macromolecules; the effect to the PVC macromolecule makes styrenes graft reaction easy, and thus improves the crosslinking efficiency.

三种体系中三乙醇胺/过氧化二异丙苯/苯乙烯体系基于过氧化物交联机理实现了聚氯乙烯的交联，聚氯乙烯交联后拉伸强度有一定提高，凝胶红外光谱分析证实了凝胶结构中含有乙醇胺的伯醇基团特征吸收和苯环的特征吸收，由凝胶结构分析，推断出交联反应的机理：聚氯乙烯在过氧化物和热作用下产生大分子自由基，苯乙烯在过氧化物和大分子自由基的作用下发生聚合和接枝反应，最终通过自由基之间的偶合产生交联；证实三乙醇胺可以吸收聚氯乙烯分解产生的HCl，提高了过氧化物的交联效率，消弱了HCl对聚氯乙烯降解的促进作用；推断三乙醇胺可以活化聚氯乙烯大分子并有可能使聚氯乙烯大分子自由基存在的时间得以延长，对聚氯乙烯大分子的作用使苯乙烯的接枝反应易于发生，从而提高了交联效率。

The reaction mechanism and the dynamic were investigated Some results were obtained as the following:1. Investigation on the photo-induced reaction mechanism of porphyrin/benzoquinonePoiphyrin/benzoquinone/CK3OD and benzoquinone/CDsOD were studied by CIDNP and ESR technique.

本文采用化学诱导动态核极化和电子自旋共振等方法，针对光合作用模型体系的光激发电子转移和基态相互作用以及跨膜电子传递反应动力学等问题，从反应机理及动力学等角度进行了探索性研究。

This project was conducted starting with the three interrelated subjects the structural characteristics of desertification landscapes in different bioclimatic zones, desertification driving factors and their function mechanism, and the dynamic model of landscape space for the occurrence and development of desertification in representative desertification regions and on the basis of in-depth studies of the relations between landscape structural characteristics and processes of desertification and their stability; the driving force of different time-space scales of desertification and their proportion, manifestation form, and action mechanism in the desertification processes; and the establishment of threshold conditions for the surface wind erosion and has achieved important progress in the definition of desertification conception

本课题从三个相互联系的专题（即不同生物气候区荒漠化景观的结构特征、荒漠化驱动因素及其作用机理、典型荒漠化地区荒漠化发生与发展的景观空间动力学模型）入手，在深入研究荒漠化景观结构特征与过程的关系及其稳定性，不同时空尺度的荒漠化过程驱动力及其在荒漠化过程中所占比重、表现形式及作用机制，地表风蚀临界条件的确定等内容的基础上，虽未建立荒漠化景观空间动力学模型，但在沙漠化概念，末次间冰期以来沙漠化过程时间序列和特征冷暖时期沙漠、沙地空间分布格局，现代沙漠化过程中自然因素和人文因素的作用、贡献率、沙漠化土地对气候的反馈作用以及风蚀临界值，沙粒跃移轨迹参数和能量分布，我国沙漠化防治思路和对策，沙尘暴区划和沙尘暴指数等方面取得了重要进展。

In order to explore the mechanism of 'brumal jujube' of maturation and scenescence and ethanol accumulation, We not only studied the quality and the post-harvest physiological and biochemical changes of 'brumal jujube' after treatment with hormone during storage, but also investigated the effects of CAi (C027%~10%02+ 2~5%C02) and CA2:(7%~10%02, C02 2%) on the changes of fermentation volatiles, activity of enzymes , the kind and content of sugar and organic acid during storage in this paper. Firstly announced the reason of ethanol accumulation under higher C02 level and discussed the mechanism of ethanol accumulation during the end of storage.

本研究以冬枣为试材，采后采用激素进行处理，通过对贮藏期间果实品质、生理生化指标、果实衰老相关指标和酶活性的测定，系统探讨了外源激素处理对果实采后品质及衰老的调控作用；另外对点红冬枣采用CA_1：(7％～10％O_2+2～5％CO_2)和CA_2：(7％～10％O_2、CO_2≤2％)进行气调贮藏，通过测定冬枣果实品质、乙醇发酵相关酶活性及代谢产物、糖酵解底物及参与三羧酸循环代谢的有机酸含量和种类，研究了冬枣贮藏后期乙醇积累的机制，探讨了枣果不耐高浓度CO_2贮藏的原因。

A carbonium ion mechanism combined with a bimolecular intermediate mechanism may be explained the isomerization of n-hexane on Pd/H-mordenite.

对正己烷在Pd/HM上的反应过程可用正碳离子机理结合双分子六元环中间物机理解释。

The protocol provides "Catechetical Mechanism" and "Captain ID Mechanism" to ensure credible order and self-relive of the system and dynamic captain change.

该协议提供&队长ID机制&和&应答机制&，实现队长的动态变更并保证可靠的命令下达与系统自恢复。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。