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The results show that optimum technological parameter of preparing Fe304 magnetic particles is reactive temperature 60℃,mixing speed 700r/min and reactive time 2.5h.when the reactant ratio and molarity remain constant.

实验结果表明，在反应物料配比及摩尔浓度一定的条件下，制备Fe_3O_4磁粒子理想的工艺参数为：反应温度60℃、搅拌速度700r/min、反应时间2.5h。

The thermodynamic calculations of the Gibbs free energies for typical multiple phase equilibria in silicate systems were performed,including (1)melting reactions of silicate reactant in processing of the glass-ceramics;(2)sintering reactions in utilizations of nepheline syenite and high- flyash;(3)crystallizing reactions of tobermorite and xonotlite .

对硅酸盐体系的典型多相平衡反应进行了热力学计算，包括：(1)微晶玻璃制备过程中的硅酸盐熔融反应；(2)霞石正长岩和高铝粉煤灰利用技术中的硅酸盐烧结反应；(3)S iO2-CaO-H2O体系和KA lS i3O8-CaO-H2O体系雪硅钙石、硬硅钙石的水热晶化反应；(4)高铝粉煤灰和霞石正长岩烧结产物的溶解反应；(5)Na[A l4]-A l3-H2O体系和Na2SO4-Ca2-H2O体系中α-A l3和CaSO4.2H2O的析晶反应。

In this section the best initial concentration of the reactant and the most suitable ratio of nZn(NO32 ∶nTi(SO42 were determined by the calculation of the recovery rate, heat analysis, TEM analysis and XRD analysis.

在此基础上对纳米ZnO-TiO2复合粉体的制备进行了深入研究，通过回收率的计算和差热、TEM及XRD等各种表征实验确定了最佳反应物初始浓度及合适的nZn(NO32 ∶nTi(SO42 反应物配比值。

The absolute configuration of the product is opposite to that of the reactant when an optically active substrate is used.

在选用光化学底物的时候，绝对产物的构型与反应物的构型相反

In addition, the pendent urea may be useful as a reactant for formaldehyde to reduce emissions of formaldehyde.

另外，下垂尿素也许是有用作为甲醛的反应剂能减少甲醛放射。

Under aqueous phase reactant limiting condition, the yield can reach 95% under appropriate conditions after reacting for 150 minutes.

於水相反应物为限量试剂时，较能突显其功效，在适当的反应条件下，反应150分钟，产率能达95%。

The results showed that the yield of phenyl glycidyl ether was 96.8% when the mole rate of sodium phenolate and epichlorohydrin was 1.15:1, the mass ratio of ionic liquid and reactant 2:1, reaction temperature 70℃ and reaction time 2h.

结果表明，在反应温度为70℃，反应时间为2h，反应物苯酚钠与环氧氯丙烷的物质的量比为1.5：1，离子液体与反应物的质量比为2：1时，苯基缩水甘油醚的产率为96.8%。

Based on orthogonal test, the factors influencing the synthesis of di-n-propyl phosphite, such as reaction temperature, reaction time and molar ratio of reactant, were investigated.

通过正交优化试验，考察了温度、时间和物料配比对二正丙基亚磷酸酯的合成收率的影响。

In the view of above-mentioned reasons, two new technologies were researched and developed by changing the distribution of heating units, the construction of furnace and relevant processing parameters in this paper. One of the technologies is multi-core heat technology for fabricating polytype industry SiC products, another is reactant heat without core for synthesizing SiC with high performance and added value at low cost by common industry raw materials.

基于上述背景，本文通过改变发热体形式、炉体结构和相应的工艺，研究开发了多炉芯发热法制备多品种工业SiC产品和无炉芯反应料发热法以普通工业原料低成本制备高性能和附加值的SiC产品的技术。

A series of chemical reactions in which the product of one is a reactant in the next.

一系列的化学反应，其中某次反应的产物是下一次反应的反应物。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。