反应速率

The experimental results show that the thermal oxidation reaction of both rosin and abietic acid are pseudo first order reaction.

枞酸的氧化反应温度为30， 35， 40， 45， 50和55 ℃时，表观速率常数分别为0.0036， 0.0041， 0.0062， 0.0087， 0.011和0.0157 min-1，表观反应活化能Ea为50.29 kJ/mol。

When the reaction temperatures were 303.15, 308.15, 313.15, 318.15, 323.15 and 328.15 K, respectively, the apparent reaction rate constants of abietic acid were 0.0036, 0.0041, 0.0062, 0.0087, 0.011 and 0.0157 min^(-1), respectively. Its reaction activation energy was 50.29 kJ/mol.

枞酸的氧化反应温度为30，35，40，45，50和55℃时，表观速率常数分别为0.0036，0.0041，0.0062，0.0087，0.011和0.0157min^(-1)，表观反应活化能E为50.29kJ/mol。

When the reaction temperatures were 303.15, 308.15, 313.15, 318.15, 323.15 and 328.15 K, respectively, the apparent reaction rate constants of abietic acid were 0.0036, 0.0041, 0.0062, 0.0087, 0.011 and 0.0157 min-1, respectively.

松香的氧化反应温度为35， 40和45 ℃时，表观速率常数分别为0.0009， 0.0015和0.0025 min-1 ，表观反应活化能 E a为80.2 kJ/mol。

Electron-withdrawing groups decrease the reactivity of benzylic C - H whileelectron-releasing groups enhance its reactivity. This is consistent with the well-knownelectron-demanding character of the Rh-carbene complex.

从相对速率的数值〓可以看到，吸电子基使苯甲位反应活性降低，给电子基使苯甲位反应活性增大，这和Rh-卡宾的亲电性一致。

The results indicated, catalytic activity was very high, the average rate of O 2 uptake was 4.25×10 -2 mmol/min after 10 min, the yield of cyclopentanone was up to 83%.

实验结果表明，该催化体系对环戊烯的羰基化显示出较高的催化活性，反应 1 0 min，反应的平均吸氧速率为 4.2 5× 1 0 -2 mmol/min，环戊酮的收率可达 83%。

Using ab initio methods, three molecular reactions about Isocyanic acid were investigated in this thesis, that is :(1) HNCO+HCO→TS→NCO+CH2O (2) A:HNCO+CN→TS→NCO+HCN B:HNCO+CN→TS1→INT→TS2→HNCN+CO (3) HNCO+NO2→TS1→INT1→TS2→INT2→TS3→HNNO+CO2 The theoretical studies show that the reaction (2) may occur by two different reaction channels, A and B.

本论文采用量子化学从头算方法，研究了异氰酸下列三个反应的反应机理和速率常数。

Using ab initio methods, three molecular reactions about Isocyanic acid were investigated inthis thesis, that is :(1) HNCO+HCO→TS→NCO+CH2O (2) A:HNCO+CN→TS→NCO+HCN B:HNCO+CN→TS1→INT→TS2→HNCN+CO (3) HNCO+NO2→TS1→INT1→TS2→INT2→TS3→HNNO+CO2 The theoretical studies show that the reaction (2) may occur by two different reaction channels,A and B.

本论文采用量子化学从头算方法，研究了异氰酸下列三个反应的反应机理和速率常数。

Influence of cooling rate, silicon and manganese content on the peritectic reaction and peritectic point of Fe-C alloys has been studied by the experimental data and production data for solving the problem of longitudinal surface cracks.

包晶反应对铸坯表面质量影响严重，笔者针对邯钢CSP生产线的表面纵裂问题，利用实验和生产数据研究了冷却速率和硅、锰合金元素对Fe-C合金的包晶反应和包晶点位置的影响。

To the reaction performed in protonic solvent, the catalytic activity decreased in the turn of methanol, ethanol and isopropanol, the highest TOF (933h〓) was achieved in methanol.

对于质子型溶剂醇中的反应，HCOOH的生成速率的顺序为甲醇＞乙醇＞异丙醇，在甲醇为溶剂中的反应，HCOOH的TOF值最高，为933h〓。

These compounds, properly designed, can be 1～2 orders of magnitude more surface active than surfactants with a single corresponding hydrophobic and a single corresponding hydrophilic group in the molecules. In this work, selected trimeric surfactant TNP is first synthesized.

本文研究了Gemini表面活性剂GNP和GTB用于脂肪酸酯的碱性水解催化作用，测定了水解速率常数和反应活化能，从动力学机理上说明了所合成的Gemini表面活性剂对脂肪酸酯水解反应有明显的胶束催化作用。

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％。