摘要
为有效利用大鲵加工副产物鲵皮,研究了从鲵皮中提取明胶的工艺条件及其部分性质。鲵皮经碱酸预处理后,以提取率为指标,通过单因素试验和正交试验优化了明胶提取的工艺参数。结果表明:鲵皮明胶最适提取条件为温度60℃,超声功率400 W、提取时间7 h,料液比1∶9(g∶m L),明胶提取率可达13.76%。鲵皮明胶中甘氨酸、脯氨酸、谷氨酸和丙氨酸含量相对较高,约占总氨基酸的50%,该明胶在234 nm处有最大紫外吸收,黏度为3.3 m Pa·s,凝冻强度Bloom值为216 g。
In order to utilize the by-products skin of giant salamander during processing, the skin gelatin extraction process and its properties were investigated. Skin was first treated by alkaline-acid pre-treatment, then using yield as the index, extraction process parameters were optimized by single-factor experiment and orthogonal experiment. Resuits showed that the optimum conditions for gelatin from the skin were as follows： the extraction temperature 70 ℃, ultrasonic power 400 W, extraction time 7 h, and the ratio of skin to water 1 ： 9, with a maximum gelain yield of 13.76%. The skin gelatin of giant salamander contained relatively high content of glycine, proline, glutamic acid and alanine, which are about 50% of the total amino acids. The skin gelatin exhibited the maximum UV absorbance at 234 nm, viscosity of 3.3 mPa · s and gel strength bloom value of 216 g.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2017年第2期174-179,共6页
Food and Fermentation Industries
基金
陕西省教育厅重点项目(15JS020)
陕西省重点实验室后补助项目(2015SZS-15-01)
关键词
大鲵
明胶
紫外光谱
凝冻强度
氨基酸
giant salamander
gelatin
ultraviolet spectrum
gel strength
amino acid
