查询词典 Chain Reaction

This damage can be due to an irritant effect, which can cause a reaction in anyone or an allergic reaction, which will only cause a reaction in some people.

这种损害，可由于一刺激性的作用，从而引起反应，在任何人或过敏反应，这只会引起的反应，在一些人。

In the part of isobutylene producing HMT, through single-factor-experiments , the best reaction condition was found as : the quantity of aluminum chloride was about 4g; the drop-wise time was about 60 min; the keeping reaction time was about 3 hours and in such a condition , the yield of reaction was 86%.

由新己烯合成HMT反应中，通过单因素优化实验，确定较好的反应条件为：三氯化铝用量为4g左右，反应时间定为60分钟左右，滴加时间确定为3小时左右，此时反应收率为86％。

Results showed that the optimal reaction conditions were: 1:1 of methanol to raw lanolin, 6.4% of sodium methoxide to total cholesterol, reaction temperature 60 ℃ and reaction time 1 h.

确定最佳反应条件为：甲醇用量为原料的1倍，甲醇钠用量为总胆固醇质量的6.4%，反应温度60 ℃。

In the gas-liquid phase reaction of catalytic oxidation of mesitylene by air to synthesize trimesic acid and the related process,an analysis method of reaction components was proposed,which includes chromatographic analysis,mass spectral analysis,IR spectrum,atomic absorption spectrophotometer and chemical titration for the purpose of analyzing reaction groups.

针对均三甲苯气液相催化空气氧化合成均苯三甲酸的反应及相关的工艺过程中，反应产物均苯三甲酸的分析问题，提出以色谱分析、质谱分析、红外光谱分析、原子吸收光谱分析及化学滴定为主要分析手段对反应组分进行分析，重点研究并建立了相关的分析方法。

The influences of reaction conditions such as material ratio, reaction temperature and time were studied.The optimum preparing condition was that the mole ratio of 1,3-diiminoiso- indoline and trimethoxysilane was 4:3,sodium methylate and tributylamine as additive ,reaction time 11h at 220℃, the yield of metal-free phthalocyanine was 46.7％.

并对反应时间、反应温度、原料配比等影响因素进行了研究，优化了工艺条件，得到的最佳反应条件是在酞菁素和三甲氧基硅烷的摩尔比为4：3，甲醇钠和三丁胺为添加剂，于220℃反应11h，无金属酞菁的最高收率为46.7％。

From the reaction mechanism, which involved formation of benzodiazepinium ethoxycarbonylmethylate, the reaction mechanism, which involved formation of benzodiazepinium ethoxycarbonyl- methylate followed by cycloaddition reaction, was tentatively proposed.

通过研究反应过程中分离出的副产物反丁烯酸二乙酯III和4，5-二氢吡唑-3，4，5-三羧酸乙酯IV，初步提出了反应经过乙氧羰基甲基化苯并二氮杂卓翁中间体V再发生环加成反应的机制。

It was found that moisture in the system of reaction is main reason that lead to deactivation of ionic liquids. The reaction mechanism of transalkylation reaction of methylnaphthalene and 1,2,4,5-tetramethylbenzene catalyzed by chlorine-aluminate ionic liquids has been proposed.

考察了离子液体的循环使用情况，分析确定了离子液体的失活原因，认为反应体系中的微量水使离子液体水解是造成离子液体失活的主要原因。

The optimum reaction conditions were: n :n=1:1.10, reaction temperature 85~95 ℃, reaction time 4 h, water carrying agent A was 50% base on the morpholine volume, the yield and purity of the product were 94.3% and 99.6%.

其最佳反应条件为：n：n＝1：1.10，反应温度为85~95℃，反应时间为4 h，带水剂A的用量为吗啉体积分数的50%，产品收率为94.3%，纯度为99.6%。

The soil urease and invertase activity effected by Hg was investigated in different fertility soils. The results show that soil urease activity、maximum reaction velocity (Vmax、Vmax/Km) and reaction velocity constant k have remarkably negative correlation with Hg concentration so that these can be used as ecological indexes of soil polluted by Hg, Km changes a little indicating that the reaction mechanism of Hg and urease is nonreversible competitive restraint. Urease of low soil fertility is more damaged by Hg than that of high soil fertility, with severe pollution at Hg concentration of 6.00 and 14.79mg/kg respectively; while invertase is less sensitive to Hg than urease. Cultural time has less influence on the relationship of soil enzyme and Hg concentration.

对不同肥力土壤脲酶和转化酶活性受汞影响进行了研究，结果显示，土壤脲酶活性、最大反应速度Vmax 、Vmax/Km和反应速度常数k与汞浓度呈现显著或极显著负相关关系，表明其可作为土壤汞污染的生态指标；米氏常数Km则变化较小，表明汞与脲酶作用机理为不可逆竞争抑制；低肥力土壤脲酶比高肥力土壤脲酶受汞毒害作用更强，当汞浓度分别为6.00和14.79mg/kg时即达到严重污染；而转化酶对汞的敏感性较差；培养时间对土壤酶与汞浓度间关系影响较小。

Neutron capture reaction i.e reaction, it is an important neutron nuclear reaction.

中子俘获反应即反应，是一种重要的中子核反应。

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。