辐解

Chlorophenol ; pulse radiolysis ; transient absorption spectra ; radicals

2-氯酚；脉冲辐解；瞬态吸收谱；自由基

Trioctyl phosphine oxide was used as the model of TRPO and its γ radiolysis was studied.

为了探讨三烷基氧化膦辐射乳化的原因及解决的办法，以三辛基氧化膦为TRPO的模型，对TOPO的γ辐解进行了研究。

Flavone and pyrocatechol were chosento act as model compounds of different structure aspects of flavonoids and theirreactions with α-hydroxyl ethyl peroxyl radical were studied. The rate constants of thereactions of α-hydroxyl ethyl peroxyl radical with flavone and pyrocatechol weredetermined to be 〓 and 〓,respectively.

我们又选择了黄酮体和邻苯二酚作为黄酮类化合物的结构模型，用脉冲辐解的方法研究了它们与α-羟乙基过氧自由基的反应动力学，得到黄酮体和邻苯二酚与α-羟乙基过氧自由基的反应速率分别为〓和〓〓。

The tryptophan residues play important roles in DNA photoreactivation catalyzed by CPD photolyases. We have investigated the action mechanism concerning Trp in DNA photoreactivation, and obtained the results as follows: 1 We proposed a mechanism of photosensitized splitting of CPDs by Trp and Trp-containing peptides. 2 Quantum yields of splitting of the model compounds that a Trp linked covalently a CPD were obtained under 290 nm light in various solvents, these values changing with solvent, range from 0.01 to 0.5. 3 Utilizing pulse radiolysis technique, splitting processes were observed in aqueous solution of the CPDs with hydrated electron and some oxidative species (such as hydroxyl radical, bromic radical and azide radical), and obtained their rate constants. In the case of interaction between CPD and hydrated electron, splitting of the CPD anion, and pyrimidine anion transfer an electron to FAD or Rf, were observed. The process rate was slower one order more than that in photolyase. Minor, but highly mutagenic UV-light-induced lesions are (6-4) photoproducts, which are repaired by (6-4) photolyases. These enzymes, discovered in 1993, are not well characterized and their mechanism is still under investigation.

我们研究它的作用机理，获得以下结果：1）建立了色氨酸及其肽对嘧啶二聚体光敏化裂解的直接修复作用机理模型；2）获得了色氨酸共价键连接于嘧啶二聚体的化合物在多种溶剂中290nm光辐照裂解的量子效率，其值随溶剂而变化，范围在0.01-0.5；3）运用脉冲辐解观察到嘧啶二聚体与水合电子和一些氧化性的自由基作用裂解过程，得到相应速率常数；对二聚体与水合电子作用发生裂解以及向FAD返还电子的过程进行了体外模拟；4）（6-4）光解酶的作用机理中一个关键假定是氧杂环丁烷中间体在接受电子后能自发裂解，恢复二嘧啶的结构。

The yields of hydrazoic acid caused by the radiolysis of mono methylhydrazine and β hydroxyethyl hydrazine are determined by Fourier transform infrared spectroscopy and spectrophtometry.

对肼、甲基肼及β羟基乙基肼进行γ射线辐照实验，分别用红外光谱和比色分析法对它们的辐解产物叠氮酸(HN3)进行定性和定量分析。

The rate constants of the reactions of α-hydroxyl ethyl peroxyl radicalwith quercetin, ruitn, catechin and baicalin were determined through pulse radiolysisstudies to be 〓,〓,〓〓 and 〓, respectively.

用脉冲辐解的方法得到槲皮素、芦丁、儿茶素以及黄芩甙与α-羟乙基过氧自由基的反应速率常数分别为〓；3.4〓；〓和〓。

When the doses are between 10 and 1 000 kGy,the main light hydrocarbons produced by radiation degradation of N,N-diethyl hydroxylamine are methane, ethane, ethene, propane and n -butane.

结果表明：当吸收剂量为10～1000kGy时，N，N 二乙基羟胺水溶液辐解产生的气态烃类主要有甲烷、乙烷、乙烯、丙烷和正丁烷。

In the second part, we used tri-octyl phosphine oxide as a model of TRPO,to study the γ radiolytic behavior of TOPO and its CH solution and the emulsificationphenomenon in the separation processes of radiolytic products. The structures of finalproducts were analyzed with IR spectra, UV spectra, MS and elemental analysis.

本论文的第二部分，以TOPO为TRPO的模式化合物，用终产物分析的方法对TOPO的辐解特性及乳化过程进行了研究，并运用红外光谱、紫外光谱以及元素分析、质谱等方法对乳化物的结构进行了分析。

At the same time,it also has high radiolysis stability. When absorbed dose reached 1 MGy,D declined remarkably. The addition of diluents resulted in a decline of radiolytic stability.

TBOPDA具有较好的辐解稳定性，当纯萃取剂的吸收剂量达到1MGy时，萃取分配比有明显下降；稀释剂的加入会使萃取剂的辐解稳定性下降。

Four main radiolysis products of chlorpyrifos and two main radiolysis products of cypermethrin were determined by using gas chromatography tandem mass spectrometry analysis method.

4 kGy剂量辐射，毒死蜱的降解率在98%；12 kGy剂量辐射，氯氰菊酯的降解率在84%；通过GC/Ms分析得出4种毒死蜱主要辐解产物和2种氯氰菊酯主要辐解产物。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。