葡萄糖酸内酯对低温酸诱导罗非鱼碎肉凝胶特性的影响  

The Gelation Properties of Tilapia Minced Meat Induced by Glucono-δ-Lactone under Low Temperature

作　　者：高宇[1,2] 毕保良 丁玉琴[3] 胡青 荣华[1,2] 王晓雯 贾丹[1,2] GAO Yu;BI Baoliang;DING Yuqin;HU Qing;RONG Hua;WANG Xiaowen;JIA Dan(College of Animal Science and Technology,Yunnan Agricultural University,Kunming 650201,China;Key Laboratory of Plateau Fishery Resources Conservation and Sustainable Utilization of Yunnan Province,Kunming 650201,China;College of Food Science and Engineering,Central South University of Forestry and Technology,Changsha 410018,China)

机构地区：[1]云南农业大学动物科学技术学院,云南昆明650201 [2]云南省教育厅高原渔业资源保护与可持续利用重点实验室,云南昆明650201 [3]中南林业科技大学食品科学与工程学院,湖南长沙410018

出　　处：《云南农业大学学报（自然科学版）》2020年第4期700-707,共8页Journal of Yunnan Agricultural University:Natural Science

基　　金：国家自然科学青年科学基金项目(31701632,31601502);云南农业联合青年项目[2017FG001(-073)]。

摘　　要：【目的】探讨葡萄糖酸内酯(GDL)调控对罗非鱼碎肉鱼糜低温酸诱导凝胶特性的影响。【方法】以罗非鱼(Oreochromis niloticus)碎肉为研究对象,测定不同GDL添加量(0、0.8%、1.6%、2.4%和3.2%)在4℃交联24 h后,pH、SDS-PAGE、游离巯基、化学作用力及凝胶特性的变化。【结果】罗非鱼碎肉在低温酸诱导凝胶形成过程中,随着GDL添加量的提高,肌球蛋白重链(MHC)呈下降趋势,游离巯基呈先下降后上升的趋势;GDL促进了二硫键的形成,但当GDL添加量为0.8%~3.2%时,二硫键含量并无显著性差异(P>0.05)。添加GDL降低了非特异性结合、离子键和氢键含量,提高了疏水相互作用。碎肉鱼糜凝胶的破断强度在2.4%GDL时达到最高,凹陷深度在1.6%~3.2%GDL时达到最高,且无显著性差异(P>0.05)。此外,添加GDL增加了碎肉鱼糜凝胶的持水性和白度。【结论】罗非鱼碎肉中添加2.4%GDL有利于获得品质较好的鱼糜凝胶制品。[Purpose]Tilapia minced surimi mediated by glucono-δ-lactone(GDL) were investigated during low-temperature.[Methods]The tilapia(Oreochromis niloticus) minced meat was used as the research object, in order to elucidate the acid induced gelation properties of tilapia minced meat under low-temperature. The addition amount of GDL(0, 0.8%, 1.6%, 2.4%, 3.2%) was added at 4 ℃for 24 h, then the pH, SDS-PAGE, free sulfhydryl, chemical interactions and gel properties were measured.[Results]During the process of low-temperature acid induced gel formation of tilapia minced meat, as the GDL addition amount increased, the intensity of myosin heavy chain(MHC) decreased, while the free sulfhydryl was decreased firstly and then increased. Although GDL contributed to the formation of disulfide bonds, the content of disulfide bond showed no significant difference(P>0.05) when adding 0.8%-3.2% GDL. The content of nonspecific associations, ionic bond and hydrogen bond decreased while hydrophobic interaction increased when GDL was added. The breaking strength of minced meat gels reached the highest when 2.4% GDL was added;the depression depth reached the highest when 1.6%-3.2% GDL was added, and there was no significant difference among them(P>0.05). Meanwhile, the addition of GDL increased the water holding capacity and whiteness of minced meat surimi gels.[Conclusions]The addition of 2.4% GDL to tilapia minced meat was beneficial to obtain good quality surimi gel products.

关 键 词：葡萄糖酸内酯 低温酸诱导 凝胶特性 罗非鱼碎肉 

分 类 号：TS254.1[轻工技术与工程—水产品加工及贮藏工程]