A STUDY ON CHEMICAL COMPOSITION AND STRUCTURE OF THE SILK DRAWN BY THE SILKWORMS RAISED WITH ARTIFICIAL FEEDSTUFF

尽管迄今为止已发表了许多关于如何培育家蚕的文章，但我们对蚕茧和蚕茧的心理特性却很遗憾。在本研究中，我们根据蚕丝的饲养条件和蚕丝的结构特点，弄清了人工饲料育成的蚕丝和天然桑叶育成的蚕丝的蛋白质组成和化学结构之间的关系。我们以奥卡拉50%含丝(奥卡拉50%含丝或蚕茧丝)、主要脱脂大豆粉(标准饲料丝或蚕茧丝)、脱脂大豆粉(标准饲料丝或蚕茧丝)、脱脂大豆粉(标准饲料丝或蚕茧丝)、脱脂大豆粉(标准饲料丝或蚕茧丝)、脱脂大豆粉(标准饲料丝或蚕茧丝)、脱脂大豆粉(标准饲料丝或蚕茧丝)、脱脂大豆粉(标准饲料丝或蚕茧丝)、脱脂大豆粉(标准饲料丝或蚕茧丝)、脱脂大豆粉(标准饲料丝或蚕茧丝)、脱脂大豆粉(标准饲料丝或蚕茧丝)、脱脂大豆粉(标准饲料丝或蚕茧丝)等3种样品为样本其次，对所制得的蚕丝的品质、牵伸性能、脱胶性能、丝胶蛋白、丝素的氨基酸组成、晶体结构、结晶度等性能进行了检测，并对…研究结果表明：(1)Okara 50蚕丝脱胶率低，剥落率高，分枝较少；(2)Okara 50蚕丝的氨基酸组成和晶体结构与生丝相差不大；(3)Okara 50蚕丝的丝胶含量高于桑蚕丝。(4)Okara 50蚕丝中丝胶的初始溶解度极高，约为100%。是生丝的2倍。获得了四个不同溶解性质的分级。(5)紫外光辐照后变黄，生丝最多，Okara 50丝很少。据推测，与生丝相比，奥卡拉50真丝被检测到含有大量脱氧胞苷一磷酸(DCMP)或胞苷酸(CMP)，因为它吸收了丝胶第一级的260 nm左右的紫外线，而且与未处理的生丝相比，经dcMP和cMP处理的生丝较少泛黄。因此，人们已经承认，dCMP和CMP在防止黄变方面发挥了很大作用。较少

Although there have hitherto been published many on how to breed silkworms, we are sorry there mental properties of cocoons and silkworms.In this study, we have made clear the correlations between the composition of proteins as well as the chemical structure of the silk obtained from the silkworms raised with artificial feedstuff and those of the silk obtained from the silkworms raised with natural mulberry leaves in consideration of their raising conditions and the structural features of silk.As the samples, we used these 3 kinds of samples such as "OKARA 50% comprised silk (OKARA 50 silk or cocoon silk)", "Mainly de-fatted soybeans powder (Standard feedstuff silk or cocoons silk)", and "Mulberry bred cocoons silk (Mulberry bred cocoons silk)" in terms of feedstuff.Next, we have examined of such properties of the silks mentioned avove as the quality, yarns drawing workability, behavior in degumming, sericin, fibroin's amino acid composition, crystal structure, degree of crystallizatio … More n, and yellowing, etc.As the result of our study mentioned above, the followings have been made clear :(1) OKARA 50 silk has a low rate of degumming, a high rate of exfoliation, and less branched textile.(2) The fibroin's amino acid composition and crystal structure of OKARA 50 silk are found little different from those of raw silk.(3) The content of sericin of OKARA 50 silk is found more than that of mulberry raw silk.(4) The sericin comprised in OKARA 50 silk has an extremely high initial dissolution that is approx. 2 times that of raw silk. Four graduations whose dissoluble properties are different from each other have been obtained.(5) As for the yellowing to the irradition of ultra-violet rays, raw silk is found the most among them and OKARA 50 silk is found little. Such cause is guessed that OKARA 50 silk in comparison with raw silk has been detected of its comprising much such deoxycytidine mono phosphate (dCMP) or cytidylic acid (CMP) as absorbing ultraviolet rays around 260nm of the first graduation of the sericin comprised therein and that raw silk treated with dCMP and CMP in comparison with that not treated with them has been found less yellowing. Thus, it has been admitted that dCMP and CMP have taken much part in prevention of yellowing. Less