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旋转相关时间
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  rotational correlation time
    The isotropic nitrogen hyperfine coupling constants α_N and the rotational correlation time τ_c of the radicals change regularly after complexing with β-CD and 2-HP-β-CD.
    结果表明,自由基与环糊精及其衍生物作用后,其超精细分裂常数αN值及旋转相关时间τC都有规律性变化.
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    We got the similar conclusion when used the denaturalization of heating, we denaturalized the protein in the range of 65°C to 85°C, via the study of ESR found when temperature increased τ_c decreased, the inner configuration of protein has loosed, copper broken away from protein center.
    用热变性得到的结论与此类似,在65℃~85℃范围内进行热变性,通过ESR的研究,发现其旋转相关时间τ_c随着温度的增加而降低,蛋白内部结构松散,铜离子脱离蛋白内部。
短句来源
    This research used a new method—ESR to study the configuration of azurin, spinned the spin label 3-maleido-proxyl to the -SH- of azurin specifically, according to the change of τ_c in the spectrum of ESR to embody the alter of inner configuration of protein.
    我们采用新的方法—电子顺磁共振方法对azurin进行内部构象的探索,用自旋标记物与天青蛋白进行特异性标记,在ESR波谱上通过标记物的旋转相关时间τ_c的变化来体现蛋白内部构象的变化。
短句来源
    In the case of using guanidine HC1 denaturalize, with the increase of guanidine concentration, the τ_ c of spin label decreased, this indicate that the inner stereo-structure of protein has loosen, and the configuration has relax.
    温度降低,分子内部驰豫行为降低。 在用盐酸胍变性的情况下,随着盐酸胍浓度的增加,旋转相关时间τ_c逐渐降低,可见蛋白内部的立体结构松散,构象已经松弛。
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  rotational correlation time
A share of membrane-bound spin probe was different for chloroplasts and subchloroplast fragments, as well as its rotational correlation time and apparent enthalpy and entropy activation of nitroxide rotational motion.
      
However, the rotational correlation time τ for spin-labeled Bs and its complex with Bn in solution corresponded precisely to their molecular weights.
      
The rotational correlation time of fulleropyrrolineoxyl was found to be about eight times longer than that of 4-oxy-2,2,6,6-tetramethylpiperidine-1-oxyl.
      
The rotational correlation time, τc, of the spin label tempamine has been used for a comparative study of internal microviscosity in normal and in homozygous β-thalassemic erythrocytes.
      
The effective rotational correlation time, σc, of the spin label 5-SASL results about one order of magnitude higher in the presence of 60 mitogen molecules/vesicle.
      
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Electron spin probe teclmology is used to study segmental motion behavior of periatohcMica / PVC and Mica / PVC. The glass-transition temperatures Tg (or T50G) of the various PVC sampleswere obtained by means of 2A'  ̄ T curves.The apparent active energies Ea of the segmental motion ofPerlatotic Mica / PVC and Mica / PVC have been given by Arrhenius equation,T.=TR' OeEa /RT. TheTi (or T50G) would decreasing when DOP was increased in the PVC. The segmental rotational active energyof Perlatotic Mica / PVC is lower...

Electron spin probe teclmology is used to study segmental motion behavior of periatohcMica / PVC and Mica / PVC. The glass-transition temperatures Tg (or T50G) of the various PVC sampleswere obtained by means of 2A'  ̄ T curves.The apparent active energies Ea of the segmental motion ofPerlatotic Mica / PVC and Mica / PVC have been given by Arrhenius equation,T.=TR' OeEa /RT. TheTi (or T50G) would decreasing when DOP was increased in the PVC. The segmental rotational active energyof Perlatotic Mica / PVC is lower than one of 2PbCO-3Ph(OH)-2PVC. Following the coca increased, theboth of Tg and Ea of the Mica / PVC could slowly rise. Experimential results shown that the used properhes of PVC would be excellent if the content of 167mg' g-1 (20 part) of coca is ben kept.

采用电子自旋探针技术对加入珠光云母和云母填充改性聚氯乙烯(PVC)的链段运动行为-玻璃化温度Tg及旋转活化能Ea进行研究.实验表明:电子自旋探针HONO在本体系中的刚性极限谱为6.86mT;自旅旋转相关时间在10ns左右,属慢旋转运动范围.并从各ESR谱得:增塑的聚氯乙烯(PVC)玻璃化温度Tg下降;对硬制品以加167mg/g(即20份)增塑剂为宜;珠光云母聚氯乙烯的Ea较低,优于目前大量生产的碱式碳酸铅珠光聚氯乙烯;云母填充改性聚氯乙烯随填充量增加,其玻璃化温度Tg上升,活化能Ea增加.填充量为167mg/g时.加工及使用等综合性能最佳.

Complexation of 4-hydroxyl-2,2,6,6-tetramethylpiperidine-1-oxyl(R) with β-cyclodextrin(β-CD) and [2-O-(2-hydroxypropyl)]-β-cyclodextrin(2-HP-β-CD) in aqueous solution are studied by electron spin resonance(ESR).The isotropic nitrogen hyperfine coupling constants α_N and the rotational correlation time τ_c of the radicals change regularly after complexing with β-CD and 2-HP-β-CD.

测定了4-羟基-2,2,6,6-四甲基哌啶氮氧自由基(R)与β-环糊精(β-CD)及单[2-氧-(2-羟丙基)]-β-环糊精(2-HP-β-CD)相互作用的电子自旋共振谱(ESR),计算了波谱参数.结果表明,自由基与环糊精及其衍生物作用后,其超精细分裂常数αN值及旋转相关时间τC都有规律性变化.

It was found in this study that the ESR spectra of three nitroxide radicals, 4-hydroxy-2,2,6,6-tetramethyliperidine-1-oxyl (R_1), 4-azido-2,2,6,6-tetramethyliperdine-1-oxyl (R_2) and 4-oxybenzene-sulfonyl-2,2,6,6-tetramethyliperidene-1-oxyl (R_3), show distinctive changes in rotational correlation time τ_C and hyperfine splitting constants a_N when included in β-cyclodextrin (β-CD) and 2-hydroxypropyl-β-CD in aqueous solution. Based on the EPR results, it is suggested that the steric factors and polarity of...

It was found in this study that the ESR spectra of three nitroxide radicals, 4-hydroxy-2,2,6,6-tetramethyliperidine-1-oxyl (R_1), 4-azido-2,2,6,6-tetramethyliperdine-1-oxyl (R_2) and 4-oxybenzene-sulfonyl-2,2,6,6-tetramethyliperidene-1-oxyl (R_3), show distinctive changes in rotational correlation time τ_C and hyperfine splitting constants a_N when included in β-cyclodextrin (β-CD) and 2-hydroxypropyl-β-CD in aqueous solution. Based on the EPR results, it is suggested that the steric factors and polarity of the functional groups affect the inclusion reaction.

测定了三种氮氧自由基与环糊精相互作用的EPR波谱,计算了波谱参数.结果表明:与环糊精作用后,自由基的超精细分裂常数(an)值及旋转相关时间(τc)都有规律变化,由此探讨了氮氧自由基与环糊精相互作用位点及作用力大小.

 
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