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B3LYP/6-311++G** calculations were carried out to study the trimethylamine catalyzed Baylis-Hillman reaction between acraldehyde and formaldehyde.
采用密度泛函DFT-B3LYP方法在6-311++G**基组下计算研究了三甲胺催化的丙烯醛和甲醛的Baylis-Hillman反应的微观过程,获得了两种反应通道(分别对应于顺式-丙烯醛和反式-丙烯醛)的势能面。
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The optimized structures and energies of the reactants, intermediates, transition states and products of two reaction channels (corresponding to syn-acraldehyde and anti-acraldehyde) in gas or in methanol solvent were obtained. The potential energy profiles reveal the processes of the trimethylamine-catalyzed Baylis-Hillman reaction between acraldehyde and formaldehyde in gas or in methanol solvent at the microscope level.
通过研究,获得了三种情况下两种反应通道(分别对应于顺式-和反式-丙烯醛)中涉及的反应物、产物、中间体、过渡态的优化结构及其能量,并由此得到了反应的势能面图,在电子微观层次上揭示了三甲胺催化的丙烯醛和甲醛的Baylis-Hillman反应的微观过程。
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Based on these results, the factors and kinetics of solar energy photoelectrocatalytic degradation of model pollulants, the cathodic behavior and its dependence on anodic reactions, have been studied in detail.It was demonstrated that metal silver and hydrogen peroxide can be generated, respectively,in the cathode during photoelectrocatalytic degradation of organics in the anode, and that photoanodic reaction is the rate-determing step in the system.
在此基础上查明了太阳能光电催化降解污染物体系的影响因素和动力学规律,阴极反应行为及与阳极反应的相互关系,实现了阳极光电催化降解污染物的同时,阴极分别回收金属银和产生过氧化氢,证明了光电催化反应时,阳极氧化反应是速率控制步骤。
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The TiO2 synthesized by normal and reverse micelles as templated were applied for phot ocatalytic of Rhodamine B and organic toxic small molecule 2.4-dichlorophenol under ultraviolet irradiation. Oxidation species and photodegradation products in the photoreaction process were detected for studying their photocatalyst properties. The results showed that: the R-TiO2 had a better photocatalysis property under UV irradiation when photodegradation of RhB and DCP compared to the N-TiO2. After 160min, the mineralized rate of RhB can be 95%. And the oxidative species was mainly referred to OH radical.
利用正相和反相胶束介质模板制备的纳米TiO2为光催化剂,在紫外光照射下,对染料罗丹明B和有机有毒无色小分子2,4-二氯苯酚进行光催化降解,研究了其光催化性能,并对光催化过程中氧化物种及降解产物进行了跟踪测定,结果表明,反相胶束模板体系制备的纳米TiO2与正相胶束介质制备的纳米TiO2比较,在紫外照射下对RhB及DCP的降解有较好的光催化性能,对RhB在160min尤催化矿化率可达95%,光催化反应主要的氧化物种涉及在基自由基。
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The molecular weight and molecular weight distribution of polyethylene were determined by GPC and Viscometry.
对GPC曲线的高斯函数拟合分峰,计算在双组分茂金属催化体系中每种催化剂得到的聚乙烯的重量之比;根据各催化剂的催化活性和按所加的催化剂的摩尔比例假定进行独立反应时,可以计算在双组分催化体系中每种催化剂得到的聚乙烯的重量之比;根据两种重量之比的比较结果和对双组分茂金属催化体系得到的聚乙烯的平均分子量和平均分子量分布的分析结果,可以推测在催化体系CatZr〓/CatZr〓中两种催化剂基本上不存在相互作用;而在CatZr〓/CatZr〓体系中两种催化剂之间可能有相互作用存在。
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Methylpyridine-coordinated ruthenium benzylidene complex 62 shows thehighest catalytic activity. TOF=960 h~(-1) is achieved during RCM reaction of 50, TOF=4 h~(-1)is obtained during the CM reaction of acrylonitrile with 1-decene.
其中,2-甲基吡啶配位的钌卡宾配合物62的催化活性最高,在催化烯烃50闭环交互置换反应时TOF可达960 h~(-1);催化丙烯腈与1-癸烯交叉交互置换反应时TOF达到4 h~(-1)。
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The experiments for determining the mechanism and kinetics of catalytic pyrolysis reaction for a simple petroleum feedstock, were carried out in a batch micro-reactor using Daqing light gas oil. The results showed that carbonium and free radical reactions were the key reactions in catalytic pyrolysis. The carbonium ions were induced by catalytic reaction, whereas free radical reaction was predominantly due to thermal cracking.
首先在重油微反装置上考察大庆减压馏分油催化裂解反应产品分布,并将反应结果与相同温度范围内的热裂解反应相比较,二者的产品分布随温度等操作参数的变化规律明显不同,进而推断催化裂解反应过程为正碳离子反应机理和自由基反应机理并存;并建立了大庆减压馏分油催化裂解消失动力学模型,求得了化学反应速率常数。
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Contrasted with the activity of the same reaction in oil-water double phased system, the hydrolyzing behavior of Camlicla Lipolytica Lipase in reversed micellar systems is much like that in oil-water double phased system. The stability and catalyzing activity are both enhanced and give rise to "superactivity". except in reverse micelles composed of cationic surfactant.
实验表明,脂肪酶CLL在反胶束体系中催化水解反应的行为与油-水双相体系中的行为大体相似,在阴离子和非离子型表面活性剂构建的反胶束中,酶的稳定性和催化活性都有所增加,呈现&超活性&。
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At first, the method of determined tannase activity was established, catalysis kinetics, catalysis characteristcs of tannase and solubility of it in RM were also studied. At the same time, various of factors effecting tannase activity were investigated.
本课题在单宁酶菌种选育及单宁酶制备研究的基础上,首次以反胶束体系为介质,确立了有机相中单宁酶活力测定方法,研究了单宁酶在反胶束中增溶定位方式、催化动力学和催化特性。
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The steady state kinetics of the lignin peroxidase catalyzed oxidation of veratryl alcohol by H2O2 in a sodium bis(2-ethylhexyl) sulfosuccinate/isooctane/toluene/water reverse micellar medium was studied and a comparison with the corresponding aqueous medium was made to understand the effect of the reverse micellar medium on the catalytic mechanism and kinetic parameters.
为了理解木素过氧化物酶在反胶束介质中的催化性能与动力学行为,本文以LiP催化过氧化氢氧化藜芦醇反应为模型反应,研究了2-乙基己基琥珀酸磺酸钠/异辛烷/甲苯/水反胶束中上述模型反应的稳态动力学并与水介质做了比较。
- 更多网络解释与反催化的相关的网络解释 [注:此内容来源于网络,仅供参考]
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pyruvate kinase:丙酮酸激酶
5)丙酮酸激酶(pyruvate kinase)别构调节酶,需要Mg2+,K+,催化的反应有ATP生成,是酵解途径的重要调节酶,长链脂肪酸、乙酰CoA、ATP、Ala等均抑制酶活;F-1,6-diP可活化此酶.
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relying primarily:主要依靠
diluting稀釋'削弱;降低 | relying primarily主要依靠 | catalytic接觸反應的;起催化作用的
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pt:铂
代,這種電池成功地應用於阿波羅(Appollo)登月太空船,從此 ...導電玻璃夾在(sandwiched)中間,其中一個覆蓋有薄的鉑(Pt)層或碳(C)層作為氧化. 還原反應的催化劑,所構成之元件稱之為染料敏化太陽能電池(DYSC),
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Hydrogenated Vegetable Oil:氢化植物油
如果在配料表上注有"氢化植物油"(Hydrogenated vegetable oil)就意味着食品中含有反式脂肪酸. 氢化植物油也叫反式脂肪酸,俗称奶精、乳马林或是人造奶油是普通植物油在一定温度和压力下加氢催化的产物. 氢化植物油不含有胆固醇类物质且相对于动物奶油价格低廉,
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anticatalase:抗过氧化氢酶, 抗催化酶
anticarious | 抗龋的 | anticatalase | 抗过氧化氢酶, 抗催化酶 | anticatalyst | 抗化剂, 反催化剂
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anticatalytic property:反催化性
anticatalyst | 抗化剂, 反催化剂 | anticatalytic property | 反催化性 | anticatarrhal | 抗卡他的, 消炎的
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anticatarrhal:抗卡他的, 消炎的
anticatalytic property | 反催化性 | anticatarrhal | 抗卡他的, 消炎的 | anticathexis | 情感的大变化, 情绪的大转变
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enzymatic reaction:(促)反應
2.2.6 经济核算及优化(optImization)的概念酶促反应(enzymatic reaction)是生物反应的基础. 从酶促反应动力学的研究中不仅可获知酶催化反应机理,还可以对酶促反应速率规律进行的定性或定量的描述,建立可靠的反应动力学方程,进而确定适宜的操作条件.
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Catalyzed:催化
化學微縮製程主要就是利用殘留於阻劑中的光酸分子,來催化(catalyzed)化學微縮試劑的交鏈反應,使得阻劑形成新的一層側壁,...
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eliminates:排除
steel mill 鋼鐵廠 | eliminates 排除 | catalytic 接觸反應的;起催化作用的