摘要
利用红外光谱法对古代丝绸与现代蚕丝进行测试分析,研究古代丝绸蛋白质分子结构的变化。结果表明:古代丝绸在老化降解的过程中,—Gly—Gly—、—Gly—Ala—Gly—肽链结构会逐渐断裂直至完全降解;蚕丝的老化降解是从非结晶区开始的,非结晶区的α-螺旋和无规构象首先被破坏,结晶区的β-折叠构象的比例相对增大;其蛋白质分子结构中形成氢键的—NH振动呈一直下降的趋势,自由的—NH振动呈先上升后下降的趋势;当老化降解达到一定程度时,其蛋白质分子结构会产生CH3对称变角振动。
In this paper, ancient silk and modern silk were tested and analyzed with infrared spectra; and the changes in protein molecular structure of ancient silk were studied. The results showed that in the aging degradation process of ancient silk, --Gly--Gly--, --Gly--Ala--Gly-- peptide chain structure would gradually break down and even be completely decomposed; aging degradation of silk started from amorphous zone; a-helix and random conformation in amorphous zone were destroyed firstly; the proportion of 13-sheet conformation in crystallization zone relatively increased; hydrogen bond--NH vibration formed in protein molecular structure showed a sustained downward trend while the free--NH vibration increased at first and went down later; when aging degradation reached certain degree, protein molecular structure would ~ene, rata CH3 symmetrical deformation vibration.
出处
《丝绸》
CAS
北大核心
2013年第12期7-10,共4页
Journal of Silk
基金
国家科技支撑计划(2010BAK67B13)
江苏高校优势学科建设工程资助项目(苏政办发[2011]6号)
关键词
古代丝绸
老化降解
红外光谱
特征峰
分子结构
ancient silk
aging degradation
characteristic peak
infrared spectrum
molecular structure
作者简介
苑萌萌（1988-），女，硕士研究生，研究方向为纺织材料与纺织品设计。
通信作者：王国和，教授，博导，wangguohe@suda．edu．cn。
