Kuan Yau-Hoong, Nafchi Abdorreza Mohammadi, Huda Nurul, Ariffin Fazilah, Karim Alias A
Food Biopolymer Research Group, Food Technology Division, School of Industrial Technology, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia.
Food Biopolymer Research Group, Food Science and Technology Department, Damghan Branch, Islamic Azad University, Damghan, Semanan, Iran.
J Sci Food Agric. 2017 Mar;97(5):1663-1671. doi: 10.1002/jsfa.7970. Epub 2016 Sep 14.
Previous studies have indicated that duck feet are a rich source of gelatin extractable from avian sources. In this study, the physicochemical and functional properties of avian gelatin extracted from duck feet (DFG) with acetic acid were compared with those of commercial bovine gelatin (BG).
The yield of DFG obtained in this study was 7.01 ± 0.31%. High-performance liquid chromatography analysis indicated that the imino acid content was slightly lower for DFG compared with BG (P < 0.05). Differences in molecular size and amino acids between DFG and BG were also observed. The isoelectric points of DFG and BG were at pH 8 and 5 respectively, and the overall protein solubility of BG was higher than that of DFG. Gels prepared from BG exhibited higher bloom strength, viscosity and clarity and were darker in colour compared with DFG gels (P < 0.05). The gelling and melting points of BG were 21.8 and 29.47 °C respectively, while those of DFG were 20.5 and 27.8 °C respectively. BG exhibited slightly better emulsifying and foaming properties compared with DFG.
Although some differences between DFG and BG were observed, the disparities were small, which indicates that DFG could be exploited commercially as an alternative source of gelatin. © 2016 Society of Chemical Industry.
先前的研究表明，鸭脚是可从禽类来源提取明胶的丰富来源。在本研究中，将用乙酸从鸭脚中提取的禽类明胶（DFG）的物理化学和功能特性与市售牛明胶（BG）的特性进行了比较。
本研究中获得的DFG产率为7.01±0.31%。高效液相色谱分析表明，与BG相比，DFG的亚氨基酸含量略低（P<0.05）。还观察到DFG和BG在分子大小和氨基酸方面的差异。DFG和BG的等电点分别为pH 8和5，BG的总体蛋白质溶解度高于DFG。与DFG凝胶相比，由BG制备的凝胶表现出更高的勃氏强度、粘度和透明度，且颜色更深（P<0.05）。BG的胶凝点和熔点分别为21.8和29.47℃，而DFG的胶凝点和熔点分别为20.5和27.8℃。与DFG相比，BG表现出略好的乳化和发泡性能。
虽然观察到DFG和BG之间存在一些差异，但差异较小，这表明DFG可作为明胶的替代来源进行商业开发。©2016化学工业协会。
