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首页> 外文期刊>Journal of Applied Polymer Science >Structural and Conformational Changes of Regenerated Antheraea pernyi Silk Fibroin FIlms Treated with methanol Solution
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Structural and Conformational Changes of Regenerated Antheraea pernyi Silk Fibroin FIlms Treated with methanol Solution

机译：甲醇处理的再生per蚕丝丝蛋白膜的结构和构象变化

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摘要

The regenerated Antheraea pernyi silk fibroin films were prepared from calcium nitrate solution and crystallized with aqueous methanol solution. The structural and conformational changes were investigated by the X-ray diffraction method and infrared spectroscopy upon methanol treatment. The concentration and treatment time of aqueous methanol solution have a great influence on the conformation of regenerated films. The conformational change from a random coil to #beta#-sheet structure was occurred within 5 min by the treatment of 40-60% methanol solution. As the methanol concentration increases up to 100%, the transition time of conformational change is delayed, and the structural change is not occurred in the case of 100% methanol used. The content of a #alpha#-helix, #beta#-sheet, and random coil conformation was calculated and examined to find out the effect of methanol treatment on the conformation changes. The #beta#-sheet structure can be transformed from random coil, while the content of #alpha#-helix structure is not changed, regardless of methanol treatment.
机译：用硝酸钙溶液制备再生的per蚕丝丝蛋白膜，并用甲醇水溶液结晶。在甲醇处理后，通过X射线衍射法和红外光谱研究了结构和构象变化。甲醇水溶液的浓度和处理时间对再生膜的构型有很大影响。通过40-60％甲醇溶液的处理，在5分钟内发生了从无规卷曲到＃beta＃-片层结构的构象变化。随着甲醇浓度增加到100％，构象变化的过渡时间被延迟，并且在使用100％甲醇的情况下不会发生结构变化。计算并检查＃alpha＃-螺旋，＃beta＃-sheet和无规卷曲构象的含量，以发现甲醇处理对构象变化的影响。 ＃beta＃-sheet结构可以从无规卷曲转变而来，而无论甲醇处理如何，＃alpha＃-螺旋结构的含量都不会改变。

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