查询词典 reaction
- 与 reaction 相关的网络例句 [注:此内容来源于网络,仅供参考]
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To ensure that the reaction force and anti-wall concrete pedestal construction quality and design requirements for reaction time pouring concrete pedestal捣成type, reaction formation pedestal error of less than ± 2.5mm; reaction wall flatness error of less than ± 2.5mm, reaction force wall verticality Gradient error is less than 10mm, anti-power wall concrete positive effects for the fair-faced concrete.
确保反力墙与反力台座的混凝土施工质量,设计要求反力台座混凝土一次浇捣成型,反力台座平整度误差小于±2.5mm;反力墙平整度误差小于±2.5mm,反力墙垂直度渐变误差小于10mm,反力墙混凝土正面为清水混凝土效果。
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The effect of different reaction conditions,such as catalyst concentration,molar ratio of reactants,reaction temperature,reaction time,on the coupling reaction of trioxane and methyl formate synthesizing methyl glycolate and methyl methoxy acetate using sulfuric acid as catalyst has been studied.Through the analysis for the yield of products and system pressure,and comparison with other different acidity catalysts,we considered that the activation of formaldehyde was the control step of reaction rate to the...
以硫酸为催化剂,研究了三聚甲醛与甲酸甲酯偶联合成乙醇酸甲酯和甲氧基乙酸甲酯的反应中,催化剂浓度、原料配比、反应温度、反应时间等条件对反应过程的影响,通过对产物收率和系统压力变化的分析,并结合与其它不同酸强度催化剂的对比,得到甲醛的活化是偶联反应的速率控制步骤,催化剂的酸强度决定其对甲醛的活化能力,是影响偶联反应的主要因素。
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The pigment in colored cotton fibers was extracted by methanol at room temperature. The results of color reactions HCl-Mg reaction, NaBH4 reaction, NaOH reaction, FeCl3 reaction and Pb(Ac2 reaction of the pigment extractive showed that the pigment extracted by methanol was flavone or flavonol with two adjacent hydroxide groups (Table 2, Fig. 1). The results of UV spectral analysis further proved that the pigment extracted by methanol from brown fiber belonged to flavone with two adjacent hydroxide groups in B ring, and that from the green fiber contained not only flavone but also flavonols with two adjacent hydroxide groups both in A ring and B ring and indican replaced a hydroxide group at 3-site of A ring Fig.
通过盐酸-镁粉反应、四氢硼钠还原反应、碱反应、醋酸铅反应、氯化铁反应和紫外光谱吸收的分析表明,甲醇室温提取的棕色棉纤维色素可能是黄酮类化合物,B环上带有邻二酚羟基;甲醇室温提取的绿色棉纤维色素除黄酮类化合物外,还含有3-位羟基被糖甙化的黄酮醇类化合物,A、B环上都带有邻二酚羟基。
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The catalysts were prepared by impregnation and precipitation method, and the active carbon,γ-Al2O3, silica and kieselguhr were selected as the carriers of catalyst. the effects of reaction conditions, such as reaction temperature, types of solvents, and types of hydrogen donors were investigated, It was found that the Pd/C catalyst was the best one, and its proper reaction conditions were also obtained as follow: sodium formate as hydrogen donor, water as solvent, reaction temperature of 70℃ and reaction time of 2.5h.
以活性炭、γ-Al2O3、硅胶和硅藻土等为载体,分别采用浸渍法和沉淀法制备了催化剂,对于反应温度、溶剂及氢供体的种类等反应条件的影响进行了研究,发现以沉淀法制备的Pd/C催化剂是对转移加氢最有效的催化剂,初步确定了适宜的反应条件为以甲酸钠作氢供体、水作溶剂及70℃反应2.5h等。
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The optimum reaction conditions were found finally. The results showed that the suitable conditions are under methanol solvent reaction temperature 40℃,the concentration of catalyzer TS-1 0.6%.,reaction time 60 minutes,propylene pressure 0.4Mpa under methanol solvent.Under Supercritical fluid system,the reaction temperature was 33.7℃(supercritical and near critical temperature),the reaction pressure was 7.58Mpa(near critical pressure and critical pressure range. propylene ), propylene pressure 0.65Mpa, reaction time 45min, cosolvent molality 4%.
而超临界体系下反(来源:4e56ABC论文网www.abclunwen.com)应温度适宜在近超临界和临界温度(33.7℃)以上,反应压力也是接近临界压力或者处于临界压力范围(7.58Mpa),丙烯压力是0.65Mpa,反应时间45min,共溶剂甲醇摩尔浓度4%,在此反应条件下,反应的转化率98%,选择性96%,收率94%,与传统条件相比较,收率提高了20%左右。
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Result:The grades of the abilities of mass motor and balance were positively correlated with the A reaction time,total reaction time of Stroop Test,and negatively correlated with the score of down-reciting in Wechsler Memory Scale.The standard score of lack of learning ability or mal-coordination was positively correlated with the D reaction time,total reaction time and the number of D errors and total errors in Stroop Test,and positively correlated with the standard grade in Ravin's Standard Progressive Matrices.The negative correlation was existed between the grade of touch excessive defense,emotionalinstability and the errors in C part and the reaction time in interference of word color in the Stroop Test.
结果:感觉统合功能量表中,大肌肉及平衡能力的等级评分与Stroop测验的A反应时、总反应时呈正相关,与韦氏记忆中倒背数字得分呈负相关;触觉过度防御及情绪不稳的等级评分与Stroop测验的C错误数和色干扰呈负相关;本体感不佳、身体协调不良的等级评分与Stroop测验的C错误数和总错误数呈负相关;学习能力发展不足或协调不良的等级评分与Stroop测验的D反应时、总反应时、D错误数、总错误数以及瑞文标准推理测验的标准等级分呈正相关;大年龄的特殊问题的等级评分与Stroop测验的C错误数、D错误数、总错误数呈负相关。
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The suitable synthesis conditions were defined as follows: the molar ratio of DCPP and resorcin was 2.1:1;the dosage of catalyst made by myself was 1.5% of the amount of the resorcinol;the first reaction temperature was 120~130℃,the reaction time was about 60min,the second reaction temperature was160~170℃,the reaction time was 60min,the third reaction temperature reaches to 210~220℃ for removing the unreacted phenol and superfluous DCPP.
确定了反应的最佳工艺条件:DCPP和间苯二酚的物质的量之比为2.1:1;使用自制的催化剂,用量为间苯二酚质量的1.5%;起始反应温度为120~130℃,反应时间约为1h;第二步反应温度为160~170℃,反应时间约为1h,最后把温度升到210~220℃除去残留在产品中的苯酚和过量的DCPP,产品收率约为92.0%。
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The results showed that the population administered with free adjuvant cholera vaccines,both low dose group and common dose group,occurred the weak adverse reaction with 10 ̄25% rate.The reaction rates between two dose groups of the same vaccine have not significant difference;The reaction rate of the first inoculation(19 ̄25%) is higher than those of the second inoculation(10 ̄15%)(P 05);The inoculating local reaction is very light ,only the very few subject occurred the scleroma with 15 mm of diameter.The reaction of aluminum absorbed cholera vaccine is slightly stronger than those of other groups.
结果表明,不加铝佐剂的O139型霍乱菌苗及O1群霍乱菌苗,不论是低剂量组(两剂全程接种45亿菌体)抑或常剂量组(全程接种90亿)接种人群均可产生10~25%的体温呈轻度升高的弱反应,并且同种菌苗的两剂量组的反应率无显著差异;第一剂接种的反应率(19~25%)较第二剂接种的(10~15%)高,P<0.05;接种局部反应轻微,只有个别受试者出现直径小于15mm的硬结;加佐剂的O1群吸附霍乱菌苗的反应较其它组强。
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The paper reviews the advanced progress in the application of ionic liquids as reaction medium as well as catalysts to organic synthesis, mainly including coupling reaction, Michael addition, Baylis-Hillman reaction, Diels-Alder reaction, Aldol reaction, Knoevenagel condensation, cyclorization reaction, alkylation and acylation, oxidation and reduction etc.
综述了离子液体作为反应介质或催化剂在有机合成传统反应类型中的最新研究成果,主要包括:偶联反应、Michael加成、Baylis-Hillman反应、Diels-Alder反应、Aldol缩合、Knoevenagel缩合、环化反应、烷基化及酰基化反应和氧化还原反应。
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DSC thermo-analysis showed that both of epoxy resins and blended resins had an exothermic peak during the period of thermal-scanning due to the curing reaction. Comparison between different kinds of liquefied wood, blending resins that using the liquefied Japanese cedar of LW-C as the raw material would undergo more degree of cross-linking reaction. They released more reaction heat, and formed a more complete cross-linking structure. However, heat treatment could promote an advanced cross-linking reaction of room temperature cured resins. DSC isothermosetting analyses showed that the curing reaction of both epoxy resins and blended resins conformed to Arrhenius kinetic model. The time needed to achieve 95% of curing reaction was shorter for blending resin than that of epoxy resin.
由DSC热分析显示环氧树脂与掺合树脂在热扫描过程中均出现硬化反应放热峰,其中以液化柳杉LW-C为原料之掺合树脂在硬化过程可进行较多之架桥反应,其反应放热量较大,硬化树脂之架桥结构较完整,而加热可促进常温硬化树脂进一步之架桥反应;由DSC等温硬化性分析显示环氧树脂与掺合树脂之硬化反应均符合Arrhenius动力学模式,添加液化柳杉之掺合树脂达95%硬化率所需时间较环氧树脂短。
- 相关中文对照歌词
- Chain Reaction
- A Violent Reaction
- Reaction
- Chain Reaction
- Chain Reaction
- Reaction
- Chain Reaction
- Chain Reaction
- Delayed Reaction
- Reaction To Action
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力