查询词典 Chain Reaction

Enzymatic interesterification of palm stearin and soybean oil was carried out by immobilized lipase Lipozyme TL IM. The reaction curve of batch operation was studied. Results showed that the reaction reached blance in 3 h with 5% lipase at 70℃, temperature of 70~90℃ did no remarkable influence on the reaction rate.

进行了固定化脂肪酶Lipozyme TL IM催化棕榈油硬脂和大豆油酶法酯交换的研究，考察了酶法酯交换分批操作的反应动力学曲线，发现5%的加酶量、70℃下反应，反应3 h内达到平衡，反应温度在70~90℃对反应速度无明显影响。

The experiment indicated that the modification of the hitting angle, the clearance of carapace, the adjustment of reaction board steeve, the repair of reaction hammer and the arraying use of reaction hammer could solve the stuff blocking problem, i.

实验表明，通过对破碎机的打击角、壳体间隙、反击板吊杆调整、反击锤修复和反击锤的排列使用进行改造，可有效解决堵料问题，提高破碎粒度，延长反击锤的使用寿命并降低成本，满足生产需要。

In the liquid reaction synthesis process, reaction temperature, reaction time and stoichiometric ratio of Li and V have effects on the structures and properties of products.

在液相合成法中，反应温度、反应时间和反应物质的原子计量比对产物的结构和性能均会产生影响。

Thus, the optimal outcome of the reaction can be fully controlled by careful observation of the correct stoichiometry of the reaction partners and the correct reaction conditions.

因此，最佳结果的反应，可以充分控制详查正确计量的反应合作伙伴和正确的反应条件。

A method of production of a reduction resistant dielectric ceramic composition having a superior low frequency dielectric characteristic and further improved in accelerated lifetime of insulation resistance, specifically a method of production of a dielectric ceramic composition containing a main component including a dielectric oxide of a specific composition, a first subcomponent including a V oxide, a second subcomponent containing an Al oxide, a third subcomponent containing an Mn oxide, and a fourth subcomponent containing a specific sintering aid in a specific ratio, including a step of mixing at least part of the materials of the subcomponents excluding one or both of at least the material of the third subcomponent and material of the fourth subcomponent with the starting materials prepared for obtaining the material of the main component to prepare the pre-reaction material, a step of causing the prepared pre-reaction material to react to obtain a reacted material, and a step of mixing the materials of the subcomponents excluded when preparing the pre-reaction material with the obtained reacted material to obtain a dielectric ceramic composition.

本发明提供一种介电陶瓷组合物的制造方法，其中介电陶瓷组合物以特定的比例含有如下成分：含有特定组成的介电体氧化物的主成分，该主成分可以提供具有优异的低频率介电特性的、绝缘电阻的加速寿命进一步提高的耐还原性介电陶瓷组合物的制造方法，含有V氧化物的第1副成分，含有Al氧化物的第2副成分，含有Mn氧化物的第3副成分，以及含有特定的烧结助剂的第4副成分；该方法包含如下工序：将至少除去第3副成分的原料和第4副成分的原料的一种或两种的其它副成分原料的至少一部分，与为了得到主成分原料而准备的起始原料混合，准备反应前原料的工序；使准备的反应前原料反应而得到反应后原料的工序；以及在所得的反应后原料中，混合在准备反应前原料时除去的副成分原料，得到介电陶瓷组合物原料的工序。

The results show that the yield of compound 5 reached a maximum of 65% under the optimum reaction conditions, where the pH of the reaction medium was 3.8~4.0, the reaction temperature was 85~90 ℃, and the molar ratio of zinc powder to compound 1 was 2.6:1. The optimum oxidant for the selective oxidation of α-methyl on compound 5 was sulfuryl chloride, and the yield of the product was 52.5%.

结果表明，合成化合物5的最佳反应条件为：反应介质pH值为3.8~4.0，反应温度85~90℃，锌粉与反应物1之间的摩尔比2.6：1，产物收率达到65%；化合物5中α-甲基选择性氧化反应的最佳氧化剂为硫酰氯，产物收率达到52.5%。

To develop an eco-friendly epoxy impregnating resin system for groundwall insulation of large generators, the curing reaction mechanism has been fully studied, the formulation and the curing techniques have been optimized, and the influence of different constitution on the curing reaction, microstructure, and final performances have been studied and characterized.In this paper, influences of different reactive organo-siloxanes on the curing reaction and performances of epoxy V.P.I.

本文研究比较了含有环氧基、氨基或乙烯基的反应性硅氧烷，包括：γ-缩水甘油醚氧丙基甲基二乙氧基硅烷、β-(3，4环氧环已基)乙基三乙氧基硅烷、γ-缩水甘油醚氧丙基三甲氧基硅、β-(3，4环氧环已基)乙基三甲氧基硅烷、γ-甲基丙烯酰氧基丙基三甲氧基硅烷、乙烯基三乙氧基硅烷和苯胺甲基三乙氧基硅烷对环氧V.P.I。

When loading a nuclear fission reactions, release of fissile material can achieve the high-temperature thermo-nuclear center, high-density state and caused thermonuclear reaction thermonuclear reaction produces a large number of neutrons causing yet more fissile loading fission reaction took place, thereby improved efficiency.

当裂变装料发生核反应时，放出的裂变能使中心的热核材料达到高温、高密度状态并发生热核反应，热核反应产生的大量中子又使更多的裂变装料发生裂变反应，从而提高了利用效率。

Phenyl or m -tolyl selenoamides reacted with functionalized α-haloacetic acid in 1∶1 or 1∶2 molar ratio with no catalyst in various alcohols to undergo a selenium transfer reaction. This reaction in dif-ferent molar ratios furnished the same C—Se—Se—C coupling products with a special structure bis diselenide. A new and facile method for synthesis of such bis(alkoxycarbonyl-methyl) diselenides with the advantages of mild reaction conditions, high yields, easy availability of starting materials and good chemical selectivity was provided.

芳基硒代酰胺与氯乙酸在各种醇中无催化剂下以1∶1和1∶2的比例投入，发生硒转移反应，不同原料投入比下的反应生成了同一种C—Se—Se—C偶联产物——具有多功能团的二烷氧羰基甲基二硒醚，提供了一种新的合成二烷氧羰基甲基二硒醚的简便方法，且反应具有条件温和、产率高、原料易得和选择性好等优点。

The N + OH reaction system has no energy barrier in the entrance channel on the PES; instead, there are double wells along the reaction path, which leads to that the integral reaction cross sections are not strongly dependent on either translational energy or initial rotational and vibrational state.

计算还显示，由于N+OH反应入口谷没有能垒，而沿着最小能量反应路径有两个势阱，因此反应的积分截面并不强烈依赖平动能和反应物分子的初始振转态。

I had a lovely dog named PiPi, he was one of my best friends.

我曾经有过一只小狗，它的名字叫皮皮，它很善良，它是我最忠实的朋友。

Newly ovulated mouse oocytes were cultured in the CZB medium supplemented with different concentrations of pyruvate before treated for activation or assayed for MPF activity.

我们猜测卵母细胞在不含丙酮酸的条件下老化的更快，并且卵丘细胞可能通过消耗不含葡萄糖的CZB中的丙酮酸从而促进卵母细胞老化。