您的位置：首页 > 论文页面
高压二氧化碳对苹果片榨汁特性的影响
发表时间：2010-09-30 浏览量：1933 下载量：761
| 全部作者： | 张立云，牛爽，杨瑛洁，徐增慧，方昱丹，廖小军 |
| 作者单位： | 中国农业大学食品与营养工程学院；中国农业大学农业部果蔬加工重点开放实验室；中国农业大学果蔬加工教育部工程研究中心 |
| 摘 要： | 研究高压二氧化碳（high pressure carbon dioxide，HPCD）处理对苹果片榨汁特性与果汁贮藏期间品质的影响，HPCD处理条件为25℃不同压强（10～30 MPa）处理20 min或25℃ 10 MPa压强不同处理时间 (10～50 min)。结果表明：多酚氧化酶（polyphenol oxidase，PPO）在10 MPa处理20 min可完全钝化。果胶甲基酯酶（pectin methylesterase，PME）比PPO对HPCD具有较强的耐受性，活性随压强的升高而下降，30 MPa处理20 min后残余活性为41.21%；10 MPa下处理时间对PME活性没有显著影响。HPCD处理苹果片对苹果浊汁的颜色有较好的保持作用，颜色指标L值显著升高，a，b值降低；浊度随压强升高或时间延长而下降；4℃贮藏7 d后，HPCD处理后的果汁褐变度无显著变化，而对照组完全褐变。 |
| 关 键 词： | 农产品加工与贮藏工程；苹果浊汁；高压二氧化碳；多酚氧化酶；果胶甲酯酶 |
| Title： | Effects of high pressure carbon dioxide on juicing characteristics of apple slices |
| Author： | ZHANG Liyun, NIU Shuang, YANG Yingjie, XU Zenghui, FANG Yudan, LIAO Xiaojun |
| Organization： | College of Food Science and Nutritional Engineering, China Agricultural University; Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture, China Agricultural University; Research Center of Fruit and Vegetable Processing Engineering, Ministry of Education, China Agricultural University |
| Abstract： | The paper studied juicing characteristics of apple slices treated by high pressure carbon dioxide (HPCD) at 10-30 MPa for 20 min or 10 MPa for 10-50 min at 25℃ and storage stability of apple cloudy juice. Polyphenol oxidase (PPO) was completely inactivated at 10 MPa for 20 min; but pectin methylesterase (PME) was more resistant to HPCD, and its least residual activity was 41.21% at 30 MPa for 20 min. HPCD retained better color of cloudy apple juice, the L value increased significantly while the a and b value decreased. The turbidity decreased with increasing of the pressure or the treatment time. After 7 d storage at 4℃, the browning degree of showed no significant changes, whereas the cloudy apple juice from the control group completely browned. |
| Key words： | processing and storage of agriculture products; cloudy apple juice; high pressure carbon dioxide; polyphenol oxidase; pectin methylesterase |
| 发表期数： | 2010年9月第18期 |
| 引用格式： | 张立云，牛爽，杨瑛洁，等. 高压二氧化碳对苹果片榨汁特性的影响[J]. 中国科技论文在线精品论文，2010，3（18）：1942-1949. |
0
评论数 0请您登录
暂无评论
下载全文
多维论文