查询词典 reaction rate

The influence of reaction temperature, reaction solution pH, the amount of solvent and reaction time on the extract yield of rutin was discussed.

探讨了反应温度、反应液的pH值、溶剂用量及反应时间对产物芦丁提取率的影响。

Through the thermodynamic calculation of the reaction that aluminum and magnesium reduce anhydrous scandium chloride molten salt to prepare aluminium-magnesium-scandium master alloy, we got that the standard equilibrium constant of the reaction is 1.074 ×10~(19), and the experimental equilibrium constant of it is approximately 6.874 × 10~(14)under around 1200 K and 1 standard pressure, which demonstrate that the reaction can take place and proceed thoroughly.

通过铝镁热还原无水氯化钪熔盐制备铝镁钪中间合金反应的热力学计算，得出：在1200K左右温度，1标准大气压下，该反应的标准平衡常数K为1.074×10~(19)，经验平衡常数K′约为6.874×10~(14)，这说明铝镁热还原无水氯化钪熔盐法制备铝镁钪中间合金的反应能够进行，而且进行的很彻底。

The calculated results are in accordance with the experimental observation that OsO〓 is unreactive to methane under the experimental condition.Ⅱ. The mechanism of the reaction of FeO〓 with ethylene For the oxidation reaction of gas-phase FeO〓 with ethylene, PESs in sextet, quartet and doublet states for various reaction channels are obtained.

二FeO〓与乙烯的反应机理通过对气相FeO〓与乙烯的反应的各种可能的低能量路径进行研究，得到了各种反应通道在二重态、四重态和六重态等三个自旋态下的势能面。

A new kind of magnesium alloys has been synthesized by high energy ball-milling of Mg and Fe mixed powders.Due to the high corrosion speed and reacting efficiency,the alloys are generally called super-corroding alloys.A SCA bulk is fabricated through cold-pressing and sintering the mechanically alloyed Mg-Fe powders.The chemical reaction of SCA with seawater rapidly releases heat and hydrogen gas,which may play very important roles in many ocean applications.For example,the reaction heat can be used to keep diver clothes warm;SCA corrosive links with the function of self-destruction can be utilized to control the sinking and floating of sonobuoy, and to salvage the training torpedo or other instruments.In addition,the reaction heat of SCA can be applied to heat food,machinery and ice or snow,which is thus very helpful for mountaineers.

超腐蚀合金采用Mg和Fe混合粉末，经高能球磨机械合金化、冷压、烧结，形成Mg-Fe合金块体，具有很高的海水腐蚀速率和反应效率，该合金化学反应放出的热量和氢气可在海洋工程中发挥重要作用，例如：可为深海作业潜水衣的保暖提供热量；由其制造的腐蚀链通过自毁机制，可用来控制声纳浮标的沉浮时间，打捞和回收水中的贵重仪器、装置以及训练用的靶雷；在偏远地区和寒冷地带，利用该合金的反应放热特性，不仅可加热机械、仪表或食品，而且能为登山运动员提供取暖所需的热量。

During these years (1997-2000) in the research area of annonaceous acetogenins 5 natural products and a number of chiral-pure analogs of annonaceous acetogenins have been synthesized using sugars as the starting materials. Their high activity and selectivity against cell line of colon tumor and a relationship between activity and configuration have been found too. In the respect of inhibitor of sialidase two new methodologies for the synthesis of chiral-pure 3-deoxy-ulosonic acid using hetero-Diels-Alder reaction or asymmetric propargylation as the key reaction were developed. On the topic of anti-leukemia marine natural product clavulactone a synthetic method based on the free radical cyclization and starting from sugar has been developed. In other title of PKC inhibited agent sphingosine a new synthetic route with SN2' as the key reaction has also been disclosed.

项目期间（1997-2000）在番荔枝内酯方面从糖出发合成了五个天然产物和一批手性纯的类似物，它们对肠癌细胞有很高的活性和选择性，并与构型有关；在唾液酸酶抑制剂方面发展了二类全新手性纯高碳糖的合成方法－杂原子D－A反应或丙炔基不对称加成为关键的反应；抗白血病海洋天然产物群柱虫内酯方面研究了由糖出发和自由基环化反应的合成方法；对PKC 起抑制作用的鞘氨醇方面也开创了新的合成途径－由糖出发并以SN2'反应为关键反应。

Effects of main reaction conditions such as reaction time to the coupling reaction and the yield of squalene were studied primarily.

初步探索了主要反应条件如反应时间等对偶联反应中产物角鲨烯得率的影响。

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。

Based on the relationship and the phenomenon model, an improved model of MR damper has been presented in this paper.

摘 要：本文在实验数据的基础上建立了磁流变阻尼器输出力与不同常电流控制量的关系，对现有的 p模型进行了改进。

I don't think our founding fathers were very fuckable.

我认为我们的开国元老没什么吸引力