摘要
以蓝莓汁为原料,研究目前果汁饮料生产较多的巴氏、超高温瞬时和微波3种灭菌方式对蓝莓原汁微生物和理化性质及感官评价的影响。研究表明:3种灭菌方式均能达到商业无菌的要求,对蓝莓汁的pH、可溶性固形物和总酸含量无影响;巴氏灭菌能有效保持蓝莓汁的悬浮稳定性、色泽和花色苷含量,但巴氏灭菌样的DPPH自由基清除率低于微波灭菌样,微波灭菌蓝莓汁的DPPH自由基清除率高达88.24%,仅比对照样低0.6%;采用定量描述分析法对灭菌样进行感官评价,巴氏灭菌一定程度上抑制了蓝莓汁酶促褐变,但破坏了天然色泽、香味,产生不宜的蒸煮味,后感明显减弱。微波灭菌则最大限度地保持了食品的色泽、香、味。因此,微波灭菌处理对蓝莓汁的灭菌效果最好,能够较好保留蓝莓汁的理化特性、感官品质和抗氧化活力。
Microorganisms, physical-chemical properties and sensory evaluation of blueberry juice by pasteurization, UHT and microwave treatment were investigated. Results indicated that the three treatments all met thecommercial sterilization requirements. The pH value, total soluble solid and total acid content of blueberry juice had no changes for the samples treated by the three methods. Pasteurization effectively maintained the suspension stability, color and anthocyanins content of blueberry juice. And the free radical scavenging ability against DPPH of the Pasteuring samples was lower than that of the microwave treatment, where the free radical scavenging ability against DPPH of microwave treatment was up to 88.24%. The sensory evaluation showed that the blueberry juice by microwave treatment was closest to the control sample than the other treatments, especially in color and aroma. Therefore, microwave treatment can effectively inactivate the microorganisms and keep the physical-chemical properties, sensory evaluation and antioxidant activity of blueberry juice.
出处
《现代食品科技》
EI
CAS
北大核心
2014年第7期205-210,共6页
Modern Food Science and Technology
基金
贵州省教育厅"125"重大科技专项(黔教合重大专项[2012]014号)
贵州省科技创新人才团队建设项目(黔科合人才团队(2013)4028)
贵州省科技创新人才团队建设项目(黔科合人才团队(2013)4028)
贵州省教育厅产学研基地项目(黔教合KY字[2012]033号)
贵州省重点支持学科
关键词
蓝莓汁
超高温瞬时灭菌
微波
巴氏灭菌
商业灭菌
blueberry juice
ultra-high temperature treatment
microwave
pasteurization
commercial sterilization
