查询词典 reaction rate

With solid state synthesis method,the expression of rate of reaction is detected and order of reaction and activation energy are defined.

本文通过固相合成的方法，对反应速率进行了测定，确定其反应的反应级数和活化能分别为4。

The levels of schistosome circulating cathodic antigen in serum and urine were detected parallelly by McAb-Dot-ELISA. In 81 acute cases, the positive rates in serum and urine were 96.30% and 66.67%(P＜0.01) but the combined positive (positive in serum and／or in urine) rate reached 100%, while in 109 chronic cases, they were 77.06% and 10.09%(P＜0.01) but the combined positive rate was not increased. In 100 healthy individuals from non-endemic areas, no positives were detected in serum and urine with false positive rate of 0%. The cross reaction rates in serum and urine of 51 cases with clonorchiasis were 9.43% and 0% but all were 0% in 48 cases with ancylostomiasis.

提要 应用McAb-Dot-ELISA平行检测血吸虫病人的血清和尿样(浓缩20倍)中日本血吸虫肠相关趋阴极循环抗原。81例急性血吸虫病患者的血清和尿样的阳性率分别为96.30%和66.67%，而血清和尿样组合检测的阳性检出率提高至100%。109例慢性血吸虫病患者的血清和尿样的阳性检出率分别为77.06%和10.09%，组合检测的阳性检出率没有提高。100份健康人的血清和尿样的假阳性率均为0%。54例华支睾吸虫病患者的血清和尿样的交叉反应率分别为9.43%和0%。48例钩虫病患者的血清和尿样的交叉反应率均为0%。

The results show that the appropriate conditions of castor oil with barium hydroxide as catalyst in transesterification reaction are: the molar ratio of methanol to oil is 6:1, castor oil to catalyst is 10:1, reaction time 90 min, the yield is 98.20%, the castor oil conversion rate is 75.13%.

结果表明，蓖麻油在以氢氧化钡为催化剂的酯交换反应中适宜条件为：醇油摩尔比6：1，蓖麻油与催化剂摩尔比10：1，反应时间90 min，生物柴油收率98.20%，蓖麻油转化率为75.13%。

In the one half part, according to the strontium nature, thermodynamic calculation of correlative reaction and the principle of the vacuum aluminothermy reduction process, with the laboratory findings of preparation strontium by vacuum aluminothermy reduction compared and analyzed in different parameter conditions, a variety of factors which effect the decomposition rate of SrCO_3 and the percent reduction of strontia are gotten out. The factors include that the decomposition rate of SrCO_3 is influenced by different addition and pressure. They also include that the percent reduction of strontia is influenced by excess coefficient of reducing agent aluminium powder, the particle size of raw material or reducing agent, the pressure of barbecuing, temperature and reduction time. According to those, we can draw the conclusion as follows:(1) Decomposition temperature of SrCO_3 is decreased by adding carbon and alumina in different degree.(2) With quantitative carbon added under the vacuum condition, the decomposition temperature of SrCO_3 is decreased obviously, which can fall 150℃ compared with atmospheric pressure.(3) In keeping 1150℃ of 2.5h, under the 5Pa vacuum condition, the decomposition rate of SrCO_3 nearly keeps in 99% steadily.

在前半部分的真空铝热还原法中，根据锶的性质、相关反应的热力学计算及真空铝热还原法原理，通过对不同参数条件下的真空铝热还原法生产金属锶的实验结果的分析比较，得出了影响SrCO_3的分解率和氧化锶的还原率的种种因素，具体因素包括不同添加剂、不同气压对SrCO_3分解率的影响，还原剂铝粉的过量系数、原料与还原剂的粒度、制团压力、温度和还原时间等对氧化锶还原率的影响，得出具体结论如下：(1)添加碳和Al_2O_3能不同程度的降低SrCO_3的分解温度；(2)真空条件下加入一定量的碳可显著降低SrCO_3的分解温度，比之常压下可降低150℃之多；(3)在1150℃恒温2.5h、真空度达到5Pa的条件下，SrCO_3的分解率几乎保持稳定在99％；(4)氧化锶的还原率随还原剂过量系数的增大而增大，但是趋势越来越小，当过量系数超过25％后，氧化锶的还原率几乎不再增加；(5)氧化锶的还原率随原料与还原剂的粒度的变细而增加；(6)氧化锶的还原率随制团压力的增加而增加，但超过一定值后，氧化锶的还原率反而会下降；(7)氧化锶的还原率随还原温度的升高而增加；(8)氧化锶的还原率随还原时间延长而增加，在本实验条件下，超过2.5h趋于稳定。

Adopting TPB as catalyzer of solidifying chemical reaction,it can distinctly quicken reactive rate. It is relatively reasonable for controling reactivetemperature at 50℃. Vacuumized and deposited one day at normal temperature before hightemperature solidifying chemical reaction, which is propitious to remove air bubble frompropellant columniation.

采用三苯基铋作固化催化剂，可明显加快固化反应的速度，固化反应的温度控制在50℃比较合理，在高温固化前抽真空和常温下放置一天有利于排除药柱中的气泡。

The gasification efficiency increased and the molar fraction of H2 decreased with an increase in the reaction temperature. The decomposition of PVA was more complete at higher temperatures. At 24 MPa, 500℃ and 120 s, the TOC remove rate, the carbon gasification rate and the hydrogen gasification rate were up to 71.46%, 67.97% and 157.24% respectively. A change in the residence time had no significant effect on the molar fraction of gas production but an increase in the residence time could enhance the gasification efficiency of PVA. It was found that the intermediates were mainly alkane, cycloparaffin, aromatic hydrocarbons, and low-molecular weight acids. It was supposed that PVA was degraded into small molecules through breaking of C-C bonds. Parts of the molecules were converted into H2, CO, CH4 and CO2 while some was converted into aromatic hydrocarbons.

过程探索发现：反应温度的升高能提高PVA气化效率，但气体产物中H2的含量随反应温度的升高有所下降；随着反应温度的升高，PVA分解趋于彻底，在压力24MPa、温度500℃、停留时间120s的条件下，TOC去除率、有机碳气化率和氢气化率分别达到71.46%，67.97%和157.24%；停留时间的变化对气体产物含量没有明显的影响，但延长停留时间能提高PVA的气化效率；PVA气化反应中间产物主要为链状烷烃、环烷烃、芳香烃及小分子酸，根据中间产物出现的顺序推测PVA的降解为由C-C键断裂形成小分子物质，这些小分子物质一部分转化为H2，CO，CH4和CO2，一部分形成难降解的芳香族化合物。

TiO〓/K-M supported Ag/SiO〓 composite ceramic membrane tubes have been prepared and used as a membrane reactor for selective separation of C〓H〓 during the catalytic reaction process of CO〓 partially oxidating C〓H〓. By removing C〓H〓 produced in the catalytic reaction, thermodynamic balance of the reaction is upset and some side reactions from C〓H〓 are avoided, thus the conversion rate of C〓H〓 and the selectivity to C〓H〓 are effectively increased.

本研究设计、制备了硅藻土—莫来石陶瓷管负载的Ag/SiO〓复合膜，并将其应用于二氧化碳部分氧化乙烷催化反应过程中产物乙烯的选择性分离，有效地提高了催化反应的反应物乙烷转化率和产物乙烯选择性。

To judge t he rate control step of intrinsic kinetics of gas-solid catalytic reaction by using Langmuir 's adsorption isothermal line, the judgment of reaction course by using the common models of liquid-solid uncatalyzed reaction .

运用朗哥缪尔吸附等温线判断气固相催化反应本征动力学的速率控制步骤，利用液－固相非催化反应的常用模型确定实际反应过程类型。

And 67. 5% in Xiangnuo 1 and IR50 respectively when they were under chilling for 2days. Chlorophyll fluorescence data showed that the reaction centers with less accumulation of redundant exciting energy and antenna systems in Xiangnuo 1 were less injured under chilling, with higher qP and qNP which were used to dissipate the redundant exciting energy, and protect the reaction centers from chilling injury. Lower qP and higher Ex as well as decreasing qNP in chilling-susceptible cultivars indicated that its reaction centers and antenna systems were damaged severely by chilling, leading to the lower photosynthetic rate.

叶绿素荧光分析的结果表明，低温下湘糯1号PSII反应中心和天线系统受到的伤害轻，反应中心过剩激发能积累少，可藉较高的qP和qNP进行过剩光能的耗散，保护光合机构免受低温伤害，而冷敏感品种qP下降快，Ex增加较多，但qNP却随低温延长而下降，说明它的反应中心和天线系统都受到了严重的低温伤害，导致光合能力下降。

A reaction modle was established,in which the surface reaction being the rate determining step and Langmuir–Hinshelwood type mechanism model being the most ideal model for the ethanol dehydration reaction.

动力学研究结果表明，在实验条件范围内，乙醇脱水生成乙烯和乙醚的反应属于平行反应，符合Langmuir-Hinshelwood机理模型，表面反应为速率控制步骤。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。