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Studies on photoyellowing of silk fibroin and alteration of its tyrosine content

机译：丝素蛋白光泛黄及其酪氨酸含量变化的研究

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摘要

The photoyellowing progress of silk fibroin and its influence factors under ultraviolet irradiation have been studied, which was conducted by combining different ultraviolet wavelengths, different ultraviolet irradiancies, and different irradiation times. The blue-ray whiteness after ultraviolet irradiation was tested to characterize the course of photoyellowing of silk fibroin. The result shows that the photoyellowing degree of silk fibroin varies significantly under ultraviolet irradiation of different wavelengths and with the increasing in ultraviolet irradiancy at 313-nm wavelength, the photoyellowing degree aggravates correspondingly, while the ultraviolet irradiancy at 340-nm wavelength has little obvious impact. Additionally, the photoyellowing degree of silk fibroin is positively correlated to ultraviolet irradiancy and irradiation time. To quantitatively analyze the alteration of tyrosine content during the photoyellowing of the silk fibroin, l-tyrosine standard curve Y=8.14666X-0.88951 was established using HPLC with linear coefficient r=0.99991 and precision degree coefficient of tyrosine analyses RSD1=0.21%. Meanwhile, the tyrosine content of silk fibroin after acid hydrolysis was quantitatively analyzed by HPLC with precision degree coefficient RSD2=1.12%. It can be seen that the change rate of the blue-ray whiteness of silk fibroin is positively proportional to the photodegradation rate of tyrosine, but the photodegradation rate of tyrosine ingredient is lower than the change rate of the blue-ray whiteness of silk fibroin.
机译：通过结合不同的紫外线波长，不同的紫外线辐照度和不同的照射时间，研究了丝素蛋白在紫外光下的黄变过程及其影响因素。测试了紫外线照射后的蓝光白度，以表征丝素蛋白的光泛黄过程。结果表明，在不同波长的紫外线照射下，丝素蛋白的光致泛黄度变化显着，并且随着313nm波长处紫外线辐照度的增加，光致泛黄度相应地加剧，而340nm波长处的紫外线辐照度影响不大。 。另外，丝素蛋白的光泛黄度与紫外线照射和照射时间正相关。为了定量分析丝素蛋白光泛黄过程中酪氨酸含量的变化，使用HPLC建立了线性关系r = 0.99991的l-酪氨酸标准曲线Y = 8.14666X-0.88951，酪氨酸的精密度系数分析RSD1 = 0.21％。同时，用HPLC对酸水解后的丝素蛋白的酪氨酸含量进行了定量分析，精密度系数RSD2 = 1.12％。可以看出，丝素蛋白的蓝光白度的变化率与酪氨酸的光降解率成正比，而酪氨酸成分的光降解率比丝素蛋白的蓝光白度的变化率低。

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  • 来源
    《The Journal of the Textile Institute》 |2016年第4期|413-419|共7页
  • 作者

    Wang Zongqian; Chen Weiguo; Cui Zhihua; He Kaijun; Yu Wei;

  • 作者单位

    Zhejiang Sci Tech Univ, Minist Educ China, Key Lab Adv Text Mat & Mfg Technol, Hangzhou, Zhejiang, Peoples R China;

    Zhejiang Sci Tech Univ, Minist Educ China, Key Lab Adv Text Mat & Mfg Technol, Hangzhou, Zhejiang, Peoples R China;

    Zhejiang Sci Tech Univ, Minist Educ China, Key Lab Adv Text Mat & Mfg Technol, Hangzhou, Zhejiang, Peoples R China;

    Zhejiang Sci Tech Univ, Minist Educ China, Key Lab Adv Text Mat & Mfg Technol, Hangzhou, Zhejiang, Peoples R China;

    Zhejiang Sci Tech Univ, Minist Educ China, Key Lab Adv Text Mat & Mfg Technol, Hangzhou, Zhejiang, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    photodegradation; l-tyrosine; standard curve; silk fibroin; photoyellowing;

    机译：光降解L-酪氨酸标准曲线丝素蛋白泛黄;

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