The Effect of Rapeseed Protein Structural Modification on Microstructural Properties of Peptide Microcapsules

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• 作者：Zhigao Wang ; Xingrong Ju ; Rong He ; Jian Yuan ; Lifeng Wang
• 关键词：Microcapsules ; Rapeseed protein isolate ; Acylation ; Hydrolysis ; High pressure ; Mechanical characterization
• 刊名：Food and Bioprocess Technology
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：8
• 期：6
• 页码：1305-1318
• 全文大小：1,402 KB
• 参考文献：Adler-Nissen, J. (1986). Enzymic hydrolysis of food proteins. England: Elsevier.
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  Junyaprasert, V. B., M
• 作者单位：Zhigao Wang (1)
  Xingrong Ju (1) (2)
  Rong He (2)
  Jian Yuan (2)
  Lifeng Wang (2)
  
  1. College of Food Science, Jiangnan University, 214122, Wuxi, People’s Republic of China
  2. College of Food Science and Engineering, Nanjing University of Finance and Economics, 210003, Nanjing, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Food Science
  Chemistry
  Agriculture
  Biotechnology
  
• 出版者：Springer New York
• ISSN：1935-5149

文摘

This study investigated the chemical, enzymatic, and physical modifications of rapeseed protein isolate (RPI) to improve its mechanical properties for its use as wall materials for rapeseed peptide (RP) microencapsulation by spray drying. The objective was to determine the effect of protein modification and the influence of the core/shell ratio on microcapsule properties. Results obtained demonstrated that microcapsules derived from the hydrolysis of RPI as wall material showed lower encapsulation efficiency (NE) than the native RPI microcapsules (63?±-.0-4?±-.7 and 91.4?±-.4?%, respectively). Conversely, acylated (degree of acylation (DA) of 47?%) and high pressure (HP) 400?MPa treatment of RPI as wall materials allowed a higher NE to be up to 99?±-.2 and 94?±-.3?%, respectively. Moreover, the data of the IR spectra curve fitting showed that wall materials obtained from hydrolyzed RPI resulted in greater loss of total secondary structures when compared to the wall material from acylated, HP-treated, and native RPI. Nanomechanical experiments also indicated that the microcapsules from hydrolyzed RPI underwent remarkable softening with an associated drop in Young’s modulus value (245?MPa) when compared to microcapsules with acylated and HP-treated RPI (450 and 310?MPa, respectively). The above results suggested that there might be an excellent correlation between IR spectra curve fittings and the nanomechanical data depicting the microstructural properties of microcapsules. In addition, higher microcapsule size and NE were observed while decreasing the spray-drying yield as the RP concentration was increased.