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Solid State NMR Investigation of the Molecular Dynamics of Cocoon Silks Produced by Different Bombyx mori (Lepidoptera) Strains

机译:固态NMR研究不同家蚕产茧蚕丝的分子动力学。

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摘要

Cocoons produced by different strains of Bombyx mori larvae were investigated by a combination of several high-and low-resolution ~1H and ~(13)C solid-state NMR techniques in order to characterize and compare their dynamic behavior at a molecular level.A detailed interpretation in terms of molecular motions in these very complex systems was possible thanks to the integrated analysis of different relaxation measurements and high-resolution selective experiments.Untreated cocoons of all strains were found to be mainly constituted by two different types of rigid domains and by a third one,more mobile,due to physisorbed water molecules.Dynamic processes in the MHz and kHz ranges were characterized by means of different ~1H and ~(13)C relaxation times.Cocoons arising from different strains exhibit a different content of physisorbed water and also slightly different dynamic behavior,especially in the MHz regime.
机译:通过将几种高分辨率和低分辨率〜1H和〜(13)C固态NMR技术相结合,研究了不同菌株的家蚕幼虫产生的茧,以便在分子水平上表征和比较其动态行为。通过对不同弛豫测量和高分辨率选择性实验的综合分析,可以对这些非常复杂的系统中的分子运动进行详细解释。发现所有菌株的未处理茧主要由两种不同类型的刚性结构域和第三个是由于物理吸附的水分子而具有更高的可移动性。在MHz和kHz范围内的动态过程的特征在于不同的〜1H和〜(13)C弛豫时间。不同菌株产生的茧表现出不同的物理吸附水含量并且动态行为也略有不同,尤其是在MHz体制下。

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