查询词典 reactants

The effects of mole ratio of reactants,reaction time and catalyst dosage on the yield of n-octylaldehyde 1,2-propylene glycol acetal were examined.

考察了醛醇摩尔比、反应时间、催化剂用量及其重复使用等因素对反应的影响，优化了反应条件。

The synthesis of terpinyl acetate with terpineol and acetic anhydride as reactants and cerium sulfate as catalyst was studied.

研究了以Ce(SO4)2.4H2O为催化剂，松油醇和乙酸酐为原料合成乙酸松油酯。

Activation energy: The difference in energy between that of the activated complex and that of reactants, the energy that must be supplied to the reactants before they can undergo transformation to product.

活化能：使低能分子达到活化状态所需要的能量。

For comparison, ordinary aqueous precipitation method was used to prepare barium carbonate by using Ba(NO3)2 and NH4HCO3 as the reactants. The influences of adding sequence of the reactants and surfactant et al. on the products were discussed.

此外，以Ba(NO_3)_2与NH_4HCO_3为反应起始物，采用沉淀法研究了制备BaCO_3的影响因素，考察了加料方式、表面活性剂等因素对产物形貌的影响。

The present invention relates to a coating composition comprising; A at least one polyester oligomer prepared from reactants comprising a 20 60 wt.% of at least one polyol, b 5 30 wt.% of at least one polycarboxylic acid selected from the group of cyclic polycarboxylic acids, the esters or the anhydrides thereof, wherein the carboxyl groups are separated by 3 carbon atoms or less, and from the group of alpha , beta -saturated acyclic polycarboxylic acids, the esters or the anhydrides thereof, and c 20 60 wt % of at least one monocarboxylic acid, the sum of the wt.% indicated for the reactants,, and always being 100 wt.%, and the oligomer being a low-viscosity oligomer having a weight average molecular weight Mw of less than 5,000, and a hydroxyl number in the range of about 200 to about 400 mg KOH/g oligomer, and B at least one polyisocyanate.

本发明涉及一种包含如下组分的涂料组合物：A至少一种由包含如下成分的反应物制备的聚酯低聚物：a20-60wt％至少一种多元醇，b5-30wt％至少一种选自其中羧基被3个或更少碳原子隔开的环状多元羧酸、其酯或酸酐以及选自α，β-饱和的无环多元羧酸、其酯或酸酐的多元羧酸，以及c20-60wt％至少一种一元羧酸，其中反应物、和的wt％之和总是为100wt％，所述低聚物是重均分子量Mw低于5000且羟基值为约200-约400mg KOH/g低聚物的低粘度低聚物，以及B至少一种多异氰酸酯。

The results show that smaller height of reaction channel can shorten the time which reactants diffuse from channel to reaction surface, longer length of micro-channel can extend residence time of reactants on the catalyst surface, and consequently increase the methane conversion and hydrogen production. The pressure drop between inlet and outlet increases lineally with the increasing of length, while the height influences the pressure drop significantly when the height is less than 0.4 mm. Based on the overall consideration for the methane conversion and resistance characteristic generally, the suitable height of channel should be between 0.4 mm and 0.6 mm.

结果表明：较小的通道高度能够减小反应物在通道中的扩散时间，较长的反应通道长度能够增加反应物与催化剂的接触时间，甲烷转化率和产氢率提高；通道长度线性地影响微通道进出口压降的大小，而在通道高度小于0.4mm时，通道高度显著地影响进出口压降的大小；综合考虑微通道的重整性能和进出口压降等因素，通道高度在0.4~0.6mm之间较为合适。

Also it is concluded that the existance of inert materials in the solid reactants is in favor of the conversion of solid reactants for any gas-solid noncatalytic reactions with molar volume of the product larger than that of solid reactant.

本文首次成功地从孔模型的角度阐明，固体反应物中的惰性杂质将有利于产物层摩尔体积大于反应物摩尔体积这类气固非催化反应中的固体反应物的转化这一普遍规律。

By adding Al into V9P8-en, researching the order of doping the reactants, thepH of originative gel, the reactants' filling volume, the form of Al source and V source,the effect that the additive rate of V : P : Al have on the productions and so on, getsome data.

一、进行了V9P8-en添加Al元素的实验，研究了起始物的添加顺序，起始反应溶液的pH值，反应釜中起始物的充填率，钒源、铝源的形式，钒、磷和铝的加入量之间的比率等对反应产物的影响。

The change of average size of products along the radius at the exist of reactor has also been calculated. The calculated results indicate that the residence time is longer, the average size of products is larger, but the distribution of size is narrower, tending to self-preserving distribution; when the concentrations of reactants increase, the average size of products becomes larger, but the distribution of size becomes narrower; the gradients of reactants are greater, the average size is larger; the increasing of reacting temperature will cause the size of product to be larger under same residence time. The average size of product at the exist of reactor varies along the radius, has a maxim value.

模型计算结果表明，产物粒度随停留时间的增加而增大，但粒度分布变窄，趋向自保分布；产物粒度随反应物进料浓度的增加而增大，粒度分布随进料浓度的增大而减小；反应器中反应物浓度梯度较大（相当于化学反应为快反应）时，相同停留时间下所得到的产物平均粒度增加；反应温度的增加，粒子平均粒径增加，粒度分布变窄；反应器出口处粒子平均粒径，随着与对称轴的距离的增加，有一极大值，先增加，后减小。

A mode of the directionally growth of PAn on the surface of NaFe〓P〓rod-like particle was suggested. Some of aniline molecules in the reactants are fixed on the surface of skutterudite particles before the beginning of the polymerization. Other aniline molecules link with the aniline molecules fixed on the surface of skutterudite and form liner chains when the initiater is added into the reactants.

提出了聚苯胺在棒状方钴矿NaFe〓P〓材料表面定向生长的物理化学模型：在表面配位键的作用下方钴矿晶须表面首先附着了一层苯胺单体，在引发剂的作用下溶液中的苯胺分子在这层单体上定向聚合，形成了定向聚苯胺线性分子。

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。