ABSTRACT

Physicochemical properties of gelatin extracted from chicken head at 60, 75, and 90 °C for 3 and 6 h, respectively were determined. Increased in extraction temperature (ETE) from 60 to 75 °C and extraction time (ETI) contributed to higher yield and bloom. ETE was highly correlated with yield (r = 0.954). Despite a higher yield, the gelatin bloom and viscoelastic properties began to drop at 90 °C. Gelatin extracted at 75 °C exhibited superior properties with high bloom strength of > 309 g, high in G’, G”, gelling (27–28 °C), and melting temperatures (33–34 °C) with great viscoelastic properties. All gelatins were of type A with α-chains as major protein. FTIR amide bands indicated different degrees of structural changed. Glycine was the main amino acid in G75/6 (20.69%) with total imino acid of 23.19%. Regression models were significant (p < .05), and highly fitted for yield and a* (R² > 0.9090%). Present findings suggest the feasibility to extract high quality gelatin from chicken head by manipulating ETE and ETI.

摘要

分别测定了从鸡头中提取的明胶在 60、75 和 90°C 下 3 小时和 6 小时的理化性质。提取温度 (ETE) 从 60 °C 增加到 75 °C 和提取时间 (ETI) 有助于提高产量和开花。ETE 与产量高度相关（r = 0.954）。尽管产量更高，但明胶起霜和粘弹性在 90 °C 时开始下降。在 75 °C 下提取的明胶表现出优异的特性，具有 > 309 g 的高起霜强度、高 G'、G”、胶凝性 (27–28 °C) 和熔融温度 (33–34 °C)，具有出色的粘弹性。所有明胶均为 A 型，以 α 链为主要蛋白质。FTIR 酰胺谱带表明结构发生了不同程度的变化。甘氨酸是 G75/6 中的主要氨基酸（20.69%），总亚氨基酸为 23.19%。回归模型显着（p < .05)，并且高度拟合产量和 a* (R ²  > 0.9090%)。目前的研究结果表明通过操纵 ETE 和 ETI 从鸡头中提取高质量明胶的可行性。