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首页> 外文期刊>Bulletin of the Chemical Society of Japan >ESR Spin Probe Investigation of Chain Ordering of a Triglycerol Membrane
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ESR Spin Probe Investigation of Chain Ordering of a Triglycerol Membrane

机译：ESR自旋探针研究甘油三酯膜链的有序性

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摘要

The chain ordering of a triglycerol membrane was investigated by continuous wave (CW) electron spin resonance (ESR) in conjunction with a spin probe method.Order parameters (So) obtained by a slow-tumbling computational analysis for 7-doxylstearic acids (7-DSA),12-DSA,and 16-DSA in poly(oxyethylene) hydrogenated castor oil (HCO) membrane at 20 C were 0.68,0.25,and 0.04,respectively.The So results suggest that the membrane chains are well ordered around the probe moiety for 7-DSA and very fluid around the 16-DSA moiety in the HCO membrane.The relative magnitude of the chain order for 12-DSA was very different from that obtained by the conventional order parameter using hyperfine coupling values.The conventional hyperiine analysis cannot verify the subtle spectral changes for 12-DSA.Moreover,the S_0 values for 7- and 12-DSA decreased differently when the temperature increased.Thus,the results obtained by a slow-tumbling simulation revealed detailed membrane chain ordering.
机译：通过连续波（CW）电子自旋共振（ESR）结合自旋探针方法研究了甘油三酸酯膜的链有序性。通过慢速翻滚计算分析获得的7-羟基硬脂酸（7- DSA），12-DSA和16-DSA在20°C的聚（氧乙烯）氢化蓖麻油（HCO）膜中分别为0.68、0.25和0.04。因此，结果表明，探针周围的膜链井井有条HCO膜中7-DSA的分子部分和16-DSA部分周围的流体非常流动.12-DSA的链序的相对大小与使用超精细偶合值通过常规的阶数参数获得的值大不相同。无法验证12-DSA的细微光谱变化。此外，温度升高时7-和12-DSA的S_0值有所不同。因此，通过缓慢滚动模拟获得的结果揭示了详细的膜链排序。

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