查询词典 activeness

Goal: To obtains the compound quantum chemistry parameter using chemistry software computation, carries on the structure analysis to this kind of weed killer member, theoretically explained that this kind of compound biology characteristic and the structure relations, for this kind of compound's activeness, the toxicity predict that action mechanism's research provides the rationale.

目的：通过利用化学软件计算得到化合物的量子化学参数，对该类除草剂分子进行结构分析，从理论上解释该类化合物生物特性与结构的关系，为该类化合物的活性、毒性预测，作用机理的研究提供理论基础。

This article reviewed the question of the photochemical catalysis material development condition and existed the problem at present, and elaborated comprehensively the nanometer TiO_2 photo-chemical catalysis technology in aspect of the application, modification, preparation, carrier research situation and so on, and introduced the nanometer TiO_2 photo-catalyst and its the doping sample and the carrier preparation method and the photochemical catalysis activeness appraisal and the attribute experimental technique in detail.

本文系统回顾了光催化材料的发展状况及现在所存在的问题，全面阐述了纳米TiO_2光催化技术在应用、改性、制备、载体等方面的研究情况，详细介绍了纳米TiO_2光催化剂及其掺杂样品、载体制备方法、光催化活性评价及表征实验方法。

This paper discusses how to use a quadrupole mass spectroscope to analyzed the whole process of thermal cleaning before the activeness of GaAs photocathode,thus the temperature and technique of the optimal thermacleaning is determine.

本文采用四极质谱仪对GaAs光电阴极激活前的热清洗过程进行分析。确定了最佳的热清洗温度及热清洗工艺，较好地解决了GaAs光电阴极激活前的热清洗工艺问题。

In order to disclosure the reason why the electrocatalysis activeness and selectivity droped after being used several hundred hours continuously, the x-ray diffraction, scanning electron microscopy and energy dispersive spectroscope have been used to characterize the surface condition variations of Monel metal. The results indicated: Monel metal belongs to the Cu-Ni alloy around the electrolysis experiment.And after being used for 600hr, the surface layer element composition and geometry distribution of the alloy changed, namely in the alloy the Cu element /which superficial free enthalpy was smaller,"concentrated" to the alloy surface,and formed one kind of marble structure microcrystallite.Thus the electrode surface becamed rough a

为了揭示蒙乃尔合金阴极在连续使用数百个小时后电催化活性剂选择性下降的原因，采用X射线衍射仪、电子扫描电镜和电子能谱分析仪对电解实验所用的蒙乃尔阴极材料在电解实验前后的表面状态进行了表征，结果表明：所使用的蒙乃尔合金阴极材料在电解实验前后均属于Cu-Ni合金，使用600hr后，由于表面层元素组成和几何排布发生了变化，即合金中表面自由焓较小的Cu元素向合金表面&富集&，形成一种大理石结构的微晶，表面粗糙、不均一，这是造成其对硝基苯电还原的催化活性及选择性随着使用时间延长而逐渐下降的主要原因，同时也为此类电极的修饰改进提供了方向。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。