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Preparation of sheep bone collagen peptide-calcium chelate using enzymolysis-fermentation methodology and its structural characterization and stability analysis

机译:使用酶解 - 发酵方法的绵羊骨胶原蛋白肽 - 钙螯合物的制备及其结构特征及稳定性分析

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摘要

In this study, enzymatic hydrolysis and Lactobacillus fermentation were used in combination to prepare collagen peptide with high free calcium content, followed by the addition of anhydrous ethanol to obtain peptide-calcium chelate. The optimal conditions for the fermentation of enzymatic hydrolysate (glucose 3%, inoculum size 6%, 24.5 h, 37 degrees C and pH 6.5) were determined by response surface methodology (RSM), under which a free calcium content of 2212.58 mg/100 g was obtained. The calcium-chelating capacity was 42.57 +/- 0.09%. The results of ultraviolet absorption spectrum, Fourier transform infrared (FT-IR) spectra, differential scanning calorimeter (DSC), X-ray diffraction and amino acid analysis indicated that calcium could be chelated through carboxyl oxygen and amino nitrogen atoms of collagen peptides, forming peptide-calcium chelate. The chelate is stable at 30-80 degrees C of temperatures and during in simulated gastrointestinal digestion, which could promote calcium absorption in human. The test intended to provide a basis for developing a novel calcium supplement and promoting utilization of sheep bone.
机译:在本研究中,使用酶水解和乳杆菌发酵组合以使胶原蛋白肽加入高钙含量,然后加入无水乙醇以获得肽 - 钙螯合物。通过响应表面方法(RSM)测定酶水解产物发酵(葡萄糖3%,接种物尺寸6%,24.5小时,37℃C和pH 6.5)的最佳条件,其中游离钙含量为2212.58mg / 100获得了g。钙螯合能力为42.57 +/- 0.09%。紫外线吸收光谱,傅里叶变换红外(FT-IR)光谱,差示扫描量热仪(DSC),X射线衍射和氨基酸分析结果表明,钙可以通过羧基氧和胶原肽的氨基氮原子螯合,形成肽 - 钙螯合物。螯合物在温度30-80℃下稳定,在模拟的胃肠消化期间,可以促进人类的钙吸收。试验旨在为开发新型钙补充剂和促进羊骨的利用提供依据。

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  • 来源
    《RSC Advances》 |2020年第20期|共10页
  • 作者单位

    Gansu Agr Univ Coll Food Sci &

    Engn 1 Yingmen Village Lanzhou 730070 Peoples R China;

    Gansu Agr Univ Coll Food Sci &

    Engn 1 Yingmen Village Lanzhou 730070 Peoples R China;

    Gansu Agr Univ Coll Food Sci &

    Engn 1 Yingmen Village Lanzhou 730070 Peoples R China;

    Gansu Agr Univ Coll Food Sci &

    Engn 1 Yingmen Village Lanzhou 730070 Peoples R China;

    Gansu Agr Univ Coll Food Sci &

    Engn 1 Yingmen Village Lanzhou 730070 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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