大腹圆蛛包卵丝的化学组成与物理机械性能

分析了大腹圆蛛包卵丝的氨基酸组成，包卵丝中极性氨基酸含量较高，小侧基氨基酸含量较少，利用SEM及计算机图像处理技术分析了大腹圆蛛包卵丝的形态结构特征，包卵丝的断面形状基本为圆形，包层包卵丝的细度约为内层包卵丝的2倍，并且外层包卵丝的纤维断面内有许多无规分布的纳米级孔隙，经冷冻干燥后，孔隙率增加了2倍左右，在此基础上，研究了大腹圆蛛包卵丝的拉伸机械性能，光泽和热性能，初步探索了性能的形成机理，大腹圆蛛内层包卵丝具有比其他功能蜘蛛丝和丝素纤维好得多的力学性能，其强度高，伸长率大，韧性好，包卵丝在光泽和热性能方面与蚕丝丝素纤维有一定的差异。     

大腹圆珠牵引丝的结构与性能分析

以大腹圆珠牵引丝为研究对象,分析了蜘蛛丝的聚集态结构特征和形态结构特征。在结构研究的基础上,探索和分析了蜘蛛丝高强度和超收缩性能的形成机理。     

Influence of Dilative Technology on Thickness and Fullness of Tussah Silk＇s Fiber and Fabric

In this paper, study objects are raw and dilative tussah silk. By means of measuring and analyzing the fiber＇s diameter, linear density, diameter coefficient, thickness and fullness, this paper focuses on the influence of dilative technology on tussah silk＇s fiber and fabric. The results include the following three aspects： the diameter coefficient of dilative tussah silk fiber is increased by 10.35%,dilative tussah heather silk is thicker and fabric fullness is improved by 9%.     

Molecular Fundaments of Mechanical Properties of Spider Silk

Dragline, framework and cocoon silk fibers of Araneus Ventricosus were used for this study. To investigate the microstructure mechanisms of stress-strain behavior of spider silk, firstly, amino acid compositions were analyzed and molecular conformations and crystallinity were measured with Raman spectra and X-ray diffraction respectively. The results showed that there were more amino acids with large side groups and polar ones in spider silk than those of Bombyx silk, and the amino acid distribution varied with different spider silk. The molecular structures were mainlyα-helix and β-sheet, and random coil andβ-turn existed as well. The proportions and arrangement of these conformations of dragline silk were different from framework and cocoon silk fibers. Microstructure was one of important factors of excellent mechanical properties of spider silk. Crystallinity of spider silk was very low, which implied that the roles of crystal on spider silk were not as great as other protein fibers.     

大腹园蛛丝腺蛋白二级结构的圆二色性研究

用圆二色光谱研究了大腹园蛛各丝腺蛋白的分子构象、大、小囊状腺体蛋白的分子构象以无规卷曲和β-折替结构为主;而其管状腺、集合状腺、鞭毛状腺蛋白的 CD 谱均显示出有α-螺旋结构的特征。用计算法所得这五种丝腺体蛋白的二级结构中含有6.2%～13.9%不等的β-转角,这对蛛丝蛋白形成独特的结构起着重要作用。还研究了放置时间对这五种丝腺体蛋白构象的影响。