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complex radical
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  复合自由基
     The results show that the formation of stable complexradical AH R· between the antioxidant AH and the carbon-centred radical R· in fat may be a main mechanism of the antioxidation of quinones antioxidant to retard lipid rancid. Thestabilization energies of the complex radical (CRSE) can keep with the relative trend of induction periods determined.
     结果表明 ,抗氧化剂 (AH)与油脂中碳中心自由基 (R·)复合成稳定自由基 (AH R·) ,可能是醌类抗氧化剂抑制或阻止油脂氧化酸败的主要机制 ,复合自由基稳定化能CRSE与诱导期测定结果的相对趋势吻合 .
短句来源
     WT5BZ]Using propenoic acid, 2_butenoic acid, 4_octenoic acid and 3,6_octadienoic acid as the substrates of unsaturated fatty acid (RH), the antioxidation mechanisms of a group of quinone and V E antioxidants (AH) are studied. Both quantum_chemistry indexs of complex radical stabilization energy CRSE and radical stabilization energy RSE, which are used to scale the relative activity of antioxidant, are recommended by the calculations of molecular mechanics and quantum chemistry.
     以丙烯酸、丁烯酸、辛烯酸和辛二烯酸模拟油脂中不饱和脂肪酸 (RH)底物 ,对一组典型醌类和VE 类抗氧化剂 (AH)的抗氧化作用进行了AM 1水平的系列量子化学模拟与计算 ,并提出两个标度抗氧化剂相对活性的量子化学指标 :复合自由基稳定化能CRSE和自由基稳定化能RSE .
短句来源
  “complex radical”译为未确定词的双语例句
     The radical cation Diels-Alder reaction of masked o -benzoquinone radical cation with furan, yielding a more complex radical cation,is studied by BhandhLYP method using 6-31G basis set.
     用密度泛函理论中的BhandhLYP方法在 6 31G基组的水平上研究了呋喃与掩蔽的邻位苯醌阳离子基的Diels Alder加成反应机制 . 研究结果表明该反应是一个分步反应 ,经历了 1个络合物 ,1个中间体和 2个过渡态 .
短句来源
  相似匹配句对
     Free Radical Scavenging Activity of Rutin-Germanium Complex
     芦丁-锗配合物及其自由基清除活性研究
短句来源
     Complex Numbers
     复数
短句来源
     Analysis on Radical Causes for Human Errors in Industrial Complex System
     复杂工业系统中人因失误根本原因分析
     Complex Rheme
     复杂述位
短句来源
     On Q-radical of Rings
     关于环的Q-根
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  complex radical
A complex radical ionic salt,N-(β-iodoethyl)pyridinium bis (7,7', 8,8'-tetracyanoquinodimethanide), (C7H9IN)+·(TCNQ)?-·(TCNQ), where TCNQ is 7,7', 8,8'-tetracyanoquinodimethane, was synthesized and studied by X-ray structural analysis.
      
Crystal and molecular structure of the complex radical ionic salt,N-(β-iodoethyl)pyridinium bis (7,7',8,8'-tetracyanoquinodimeth
      
For the complex radical reaction systems of reactive processing the kinetics of the rate determining initiator decomposition is of preeminent importance.
      
Experimental results fit the model proposed earlier for the electroreduction of intermediates, which includes two parallel pathways for electron transfer-onto an adsorbed radical and onto a metastable complex radical-proton donor.
      
The success rate of 68% after ten years' follow-up suggests that there is a group in which complex radical release is unnecessary.
      
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The antioxidation of miltirone I, dehydromiltirone and miltirone in fat and the relationship between the structures and antioxidative activities of the three tanshinones are studied by quantum chemical calculation. The results show that the formation of stable complexradical AH R· between the antioxidant AH and the carbon-centred radical R· in fat may be a main mechanism of the antioxidation of quinones antioxidant to retard lipid rancid. Thestabilization energies of the complex radical (CRSE)...

The antioxidation of miltirone I, dehydromiltirone and miltirone in fat and the relationship between the structures and antioxidative activities of the three tanshinones are studied by quantum chemical calculation. The results show that the formation of stable complexradical AH R· between the antioxidant AH and the carbon-centred radical R· in fat may be a main mechanism of the antioxidation of quinones antioxidant to retard lipid rancid. Thestabilization energies of the complex radical (CRSE) can keep with the relative trend of induction periods determined. The chemical activity of AH and the stability of AH R· have animportant effect on the antioxidation. Theatomic spin populations and the atomic free valencein AH R· are two valuable parameters of electronic structure with respect to the relative activity of antioxidants.

对迪尔特醌Ⅰ、脱氢迷尔特醌和迷尔特醌在油脂中的抗氧化作用及其构效关联进行了AM 1水平的量子化学研究 .结果表明 ,抗氧化剂 (AH)与油脂中碳中心自由基 (R·)复合成稳定自由基 (AH R·) ,可能是醌类抗氧化剂抑制或阻止油脂氧化酸败的主要机制 ,复合自由基稳定化能CRSE与诱导期测定结果的相对趋势吻合 .AH的化学活性和AH R·的稳定性对此种抗氧化作用有重要影响 .对于抗氧化剂相对活性的比较 ,AH R·中原子自旋集居分布和原子自由价是两个有价值的电子结构参数

WT5BZ]Using propenoic acid, 2_butenoic acid, 4_octenoic acid and 3,6_octadienoic acid as the substrates of unsaturated fatty acid (RH), the antioxidation mechanisms of a group of quinone and V E antioxidants (AH) are studied. Both quantum_chemistry indexs of complex radical stabilization energy CRSE and radical stabilization energy RSE, which are used to scale the relative activity of antioxidant, are recommended by the calculations of molecular mechanics and quantum chemistry. The results of CRSE...

WT5BZ]Using propenoic acid, 2_butenoic acid, 4_octenoic acid and 3,6_octadienoic acid as the substrates of unsaturated fatty acid (RH), the antioxidation mechanisms of a group of quinone and V E antioxidants (AH) are studied. Both quantum_chemistry indexs of complex radical stabilization energy CRSE and radical stabilization energy RSE, which are used to scale the relative activity of antioxidant, are recommended by the calculations of molecular mechanics and quantum chemistry. The results of CRSE and RSE coincided with the relative tendencies of the induction periods and rate coefficients determined experimentally on the antioxidants. Thus the reactions of these antioxidants follow their antioxidation mechanisms.

以丙烯酸、丁烯酸、辛烯酸和辛二烯酸模拟油脂中不饱和脂肪酸 (RH)底物 ,对一组典型醌类和VE 类抗氧化剂 (AH)的抗氧化作用进行了AM 1水平的系列量子化学模拟与计算 ,并提出两个标度抗氧化剂相对活性的量子化学指标 :复合自由基稳定化能CRSE和自由基稳定化能RSE .CRSE和RSE同诱导期和速率常数测定结果的相对趋势吻合 ,并可按作用机制对油脂抗氧化剂进行分类

The radical cation Diels-Alder reaction of masked o -benzoquinone radical cation with furan, yielding a more complex radical cation,is studied by BhandhLYP method using 6-31G basis set. It is supposed that this reaction occurs by a two step mechanism and there are a complex, an intermediate and two transition states. The first step is rate determining and its barrier is about 79.16 kJ·mol -1 . The energy of the reactant is the highest of all the stationary points.

用密度泛函理论中的BhandhLYP方法在 6 31G基组的水平上研究了呋喃与掩蔽的邻位苯醌阳离子基的Diels Alder加成反应机制 .研究结果表明该反应是一个分步反应 ,经历了 1个络合物 ,1个中间体和 2个过渡态 .该反应的决速步为第 1步 ,其活化位垒ΔE =79.16kJ·mol- 1.该反应有 2个特点 :①在所有的驻点中反应物的能量是最高的 ,因此决定了在反应的开始会先生成一个能量比较低的络合物 ;②传统上多用作双烯的呋喃在该反应中扮演了亲双烯体的角色 ,而掩蔽的邻位苯醌阳离子基则作为双烯体参与反应 .

 
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