Stability of silk and collagen protein materials in space.

Stability of silk and collagen protein materials in space.
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DOI:
10.1038/srep03428
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发表时间:
2013-12-05
期刊:
影响因子:
4.6
通讯作者:
Kaplan, David L.
Kaplan, David L.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Hu, Xiao;Raja, Waseem K.;An, Bo;Tokareva, Olena;Cebe, Peggy;Kaplan, David L.

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胶原蛋白和丝材料,以纯净的形式和二氧化硅复合材料,在国际空间站上飞行了18个月[材料国际空间站实验(MISSE)-6],以评估空间辐射对结构和功能的影响。作为天然生物材料,研究了空间环境对这些蛋白质薄膜的影响,以了解与未来空间环境中材料和医学用途有关的结构和功能的根本变化。大约15%的薄膜表面被原子氧等重电离粒子蚀刻,原子氧是低地球轨道空间环境的主要组成部分。出乎意料的是,超过80%的蚕丝和胶原蛋白材料通过太空辐射进行了化学交联。这些发现对于设计下一代与空间环境中的生命系统接触的生物相容性材料至关重要,需要考虑重电离粒子和其他宇宙辐射的影响。
Collagen and silk materials, in neat forms and as silica composites, were flown for 18 months on the International Space Station [Materials International Space Station Experiment (MISSE)-6] to assess the impact of space radiation on structure and function. As natural biomaterials, the impact of the space environment on films of these proteins was investigated to understand fundamental changes in structure and function related to the future utility in materials and medicine in space environments. About 15% of the film surfaces were etched by heavy ionizing particles such as atomic oxygen, the major component of the low-Earth orbit space environment. Unexpectedly, more than 80% of the silk and collagen materials were chemically crosslinked by space radiation. These findings are critical for designing next-generation biocompatible materials for contact with living systems in space environments, where the effects of heavy ionizing particles and other cosmic radiation need to be considered.
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