羽毛および羊毛ケラチン溶液よりユバ様皮膜の生成について

DOI Web Site 被引用文献1件
  • 河野 幸男
    東京農工大学農学部農芸化学科 旭化成工業株式会社食品研究所
  • 渡辺 研
    東京農工大学農学部農芸化学科
  • 岡本 奨
    東京農工大学農学部農芸化学科

書誌事項

タイトル別名
  • On the Formation of Yuba-like Film from Chicken Feather and Wool
  • ウモウ オヨビ ヨウモウ ケラチン ヨウエキ ヨリ ユバ ヨウ ヒマク ノ セイセイ ニ ツイテ コウタンパクシツ リヨウ ニ カンスル ケンキュウ 1

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説明

The aim of this paper is to elucidate the mechanism of the formation of Yuba-like film from chicken feather and wool. The conditions of film formation, stress, strain and other properties of the film were studied. Strong, transparent, elastic and smooth films were formed from 2.5% chicken feather keratin solution at pH 4.0_??_10.0 by means of only heating the solution at 60°C. It seems to be necessary that protein is completely solubilized and unfolded to a certain extent and that coagulation of protein molecules on the surface of the solution is not prevented.<br> Addition of mono-iodoacetic acid and N-ethylmaleimide, the modifying reagents of sulfhydryl group, decreased the stress and increased the strain of the film. While L-ascorbic acid and sodium bisulfite, the reducing reagents of disulfide bond, increased the stress remarkably.<br> Remarkable differences in the fine structure were observed between the surface and the back of the chicken feather keratin film under electron microscope. And the layer structure and the orientation of the keratin fibril in the film were observed.<br> Marked differences were shown among wool, its extracted powder and its film from the comparison of their amino acid compositions, while in case of chicken feather keratin differences among them were a little.<br> From the results of IR spectroscopy and X-ray diffraction measurement it was most likely that the keratin took α-form in the solution and β-form in the film.

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