化学活性

由于这些不配对电子，这些分子或原子常具有高度的化学活性。

These unpaired electrons are the cause for the high chemical reactivity of free radicals .

分子结构与化学活性间的定量关系Ⅱ.烯类与丙二酸二乙酯的加成反应

A quantitative relationship between molecular structure and chemical reactivity ⅱ . the addition reaction of alkenes and diethyl malonate

本文作者发现，粉煤灰在水中悬浮掖的pH值是表征粉煤灰化学活性的一个指标。

PH value of fly ash suspension in water is found to be an index characterizing the chemical activity of fly ash .

相对而言，NiCrP效果更好，这与Cr对金刚石的化学活性较高，NiCrP熔点较低以及金刚石、镀层、结合剂三者之间的界面反应等有关。

For the comparatively high activity of Cr and the low melt point of Ni Cr P , Ni Cr P coating is more effective than Ni W P coating .

具有高的化学活性的富Hf液膜容易在铸件表面形成Hf2O薄层。

The high chemical activity of skin Hf-rich liquid promotes the formation of a thin layer of Hf_2O on the surface of castings .

稀土元素几乎是唯一能与钢中Pb、Sn等有害元素化合的元素，这是因为稀土元素电子结构特殊而具有极强的化学活性。

The RE elements are nearly only elements that can be compound with harmful elements such as Pb , Sn and so on in the steel .

其本质原因是结晶不完全的BN晶体结构松散，层间距较大，化学活性较高。

The essential reason for this is the loose structure of amorphous BN which has a larger layer spacing and higher chemical activity .

化学活性MnO2的研究

Study of active CMD

键离解能（bonddissociationenergy，BDE）是影响化学活性的一个基本因素，也是自由基过程中的关键因素。

The bond dissociation energy ( BDE ) is a basic factor which can influence the chemical activity and is an import factor in the course of the free group .

矿物粉尘的pH值/电导率比值是矿物表面的特征值，全面反映其溶解度、化学活性、表面电性、降解和残留、防腐、配伍等方面的行为趋势。

The pH and conductivity of mineral dusts are their surface characteristic values and can all_sidedly reflect the behavior tendencies of their solubility , chemical activity , surface electricity , decomposition and remaining , preservation , compatibility etc.

最后计算了团簇基态的能级分布和最高占据轨道（HOMO）与最低空轨道（LUMO）之间的能级间隙（HLG），分析了团簇的化学活性。

Finally , the energy level distribution , HOMO-LUMO gaps and the chemical activation are investigated .

用X-射线衍射仪、TEM、AFM、FITR和GPC表征，证明NCC-Ⅰ有低的分子量、窄的分子量分布及较高的化学活性；

The experimental results of X-ray diffraction , TEM , AFM , FTIR and GPC show that nano-crystal cellulose has small molecular weight , narrow distribution of molecular weight and high chemical activity .

本文结合实例说明Pauling规则在联系化合物稳定性、生物化学活性方面的应用。

This paper explains with examples the application of Pauling rule in stability and biochemical activity of compound .

ITO废料经过机械活化后，化学活性提高，反应速度加快，表观活化能和反应级数降低。

Chemical activation can be enhanced , reaction speed can be improved , the apparent activation energy and the reacting order can be decreased since the ITO is activated in the mechanical activation equipment .

介绍了热煤气中HCl脱除剂的研究概况，包括脱除剂化学活性组分的选择和脱除剂性质的研究进展。

In this paper , it is briefly introduced that the development of disposal sorbents for HCl removal from hot coal-derived gas at abroad , including studies for its chemical active ingredients and properties .

水体沉积物中的酸溶性硫化物（AVS）极易与二价金属阳离子反应生成难溶金属硫化物，从而控制沉积物中二价有毒金属的化学活性和生物有效性。

Acid volatile sulfides ( AVS ) in sediments are available for binding divalent cationic metals through the formation of insoluble metal-sulfide complexes , thereby controlling the metal bioavailability and subsequent toxicity to benthic communities .

使用三种具有不同化学活性功能团的mPEG（mPEG-SPA、mPEG-BTC、mPEG-MAL）在不同温度、不同pH的PS条件下对指示细胞&HLA-A2淋巴细胞进行修饰。

Three kinds of mPEG ( mPEG-SPA , mPEG-BTC , mPEG-MAL ) were used in various temperature , pH and PS to camouflage HLA-A2 antiges on the surface of lymphocytes .

而目前的研究，陆续发现了薏苡含有许多特殊的植物化学活性成分，其中之一就是被广为用来抗癌的丙酮萃取物&薏苡仁酯（coixenolide）。

From current studies , many phytochemical active ingredients from Coix were discovered and one of them is coixenolide , the acetone extract being widely used in anticancer .

丹参醌分子本身的化学活性和对应的AH-R·与A·的稳定性对此类抗氧化作用有重要影响。

The chemical activities of tanshinone molecule and the stabilities of AH-R · and A · have important effects on the antioxidation .

此条件下，菱镁矿分解率可达99%以上，氧化镁化学活性好，其吸收氯离子值为36mol／kg，与水反应速度快。

On this condition , the resolution ratio of magnesite can get to 99 % , and the achieved MgO is with good chemical activity , the adsorption to chloride ion is 36mol / kg , and hydrated reaction is prompt .

但PECVD中等离子体的密度沿径向分布均匀性较差、空间气氛化学活性较差。

But , the density of plasma attenuates rapidly along the radial distribution in the PECVD and the chemical active in the space atmosphere is weak , so a new style of PECVD device that added electron emitter and quadrature electric-magnetic field is designed .

同时，挥发性硫化物（VSCs）具有沸点低、嗅阈值低（PPb级）、化学活性强，稳定性差等特点，其采样和分析技术是国际公认的难题。

Meanwhile volatile sulfide compounds ( VSCs ), having a low boiling point , low-threshold olfactory ( PPb level ), being chemically active and with poor stability characteristics , makes sampling and analytical techniques publicly known international problems .

煤矸石中微量重金属元素化学活性的实验模拟研究

Experimental Simulation of Chemical Activity of Heavy Metals in Coal Gangue

钙剂的化学活性与生物学活性实验研究

Experimental study of chemical and biological activity of calcium pharmaceuticals

2-烯丙氧基-1,2-氧硼杂戊环（1）的侧链有较大化学活性。

2-Allyloxy-1,2-oxaborolane ( 1 ) has an active side chain .

新型化学活性与生物活性聚合物的制备。

The preparation of new chemically active and bioactive polymers .

并对活化氮的化学活性进行了初步的探讨。

Chemical activity of active nitrogen was studied and discussed .

团簇的稳定性逐渐增强；铅团簇的化学活性小于钯团簇。

The chemical activity of lead is smaller than that of palladium .

重金属化学活性评估方法准确性质疑&以煤矸石样品为例

Discussion about Accuracy of Assessment Method of Chemical Mobility of Heavy Metals

低温焚烧稻壳灰的显微结构及其化学活性

Microstructure and chemical activity of rice husk ash burned at low temperature