摘要
采用不同包装形式(100%氮气铝箔包装、80%氮气:20%二氧化碳铝箔包装、60%氮气:40%二氧化碳铝箔包装、真空铝箔包装、实际工厂包装(白板纸塑/HDPE)和PE包装将大豆分离蛋白(SPI)包装后在高温高湿环境(RH80%、温度30℃)条件下储藏5个月)。研究储藏环境、时间、包装条件对SPI的7S/11S、巯基、二硫键及溶解性的影响。结果表明:充气包装中的氮气能够使SPI的溶解性迅速增加,SPI功能特性相对保持较好。通过对各包装中SPI功能特性的比较得出包装材质对温湿度的阻隔性:铝箔包装>工厂包装>PE包装。通过相关性分析得出,PE包装中SPI的7S/11S比值与其溶解性相关性不显著(0.324),巯基含量与溶解性极显著正相关(0.922)。
During storage and transport,the functional characteristics of soy protein isolate （SPI） may deteriorate,which impacts its industrial applications. In the present study,different packaging ways：packaging in aluminium foil bag vacuumed or filled with 100% nitrogen gas or a mixture of nitrogen gas and carbon dioxide （4：1 or 3：2,V/V）,practical industrial packaging （packaging with white paper/plastic/high density polyethylene,HDPE） and polyethylene （PE） packaging were used to package SPI,followed by 5-month storage in high temperature （30 ℃） and humidity （80%） environment in order to address the effects of storage environment and period and packaging conditions on the 7S/11S ratio,sulfhydryl group content,disulfide bond content and solubility of SPI. Nigtrogen-filled packaging promptly increased the solubility of SPI and was beneficial to better mainte-nance of the functional characteristics of SPI. Comparatively,aluminium foil packaging was the best barrier to humidity,followed by practical industrial packaging and PE packaging. The 7S/11S ratio of PE packaged SPI had no significant correlation with its solubility,but there was a significant positive correlation between its sulfhydryl group content and solubility.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2010年第19期54-58,共5页
Food Science
关键词
大豆分离蛋白
储藏
溶解性
包装
soy protein isolate （SPI）
storage
solubility
packaging
