复合保鲜剂结合MAP对鲜切茄子贮藏品质的影响
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(上海海洋大学食品学院,上海 201306)

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谢晶(1968—),女,上海海洋大学教授,博士,博士生导师。E-mail: jxie@shou.edu.cn

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国家级星火计划课题(编号:2012GA680003)


Effect of chitosan compound preservative combined with modified atmosphere packaging on quality of fresh-cut eggplant during storage
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(College of Food Science & Technology, Shanghai Ocean University, Shanghai 201306, China)

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    摘要:

    为延长鲜切茄子的保鲜时间,研究单一气调包装(2% CO2+5% O2+93% N2)和保鲜液(1.5%壳聚糖+1%抗坏血酸+1%氯化钙+2%柠檬酸)结合气调包装对鲜切茄子品质的影响。以感官评分、褐变度、硬度、多酚氧化酶(PPO)活性和细菌总数为指标,分析鲜切茄子于(10±1) ℃下贮藏8 d内的品质变化。结果表明:贮藏8 d后,对照组样品的L*值、硬度、PPO酶活性和细菌总数分别为75.66、741 kg/cm2、68.77 U/(min·g)和5.52 lg CFU/g,而经保鲜液结合气调包装的鲜切茄子各指标分别为82.51、10.05 kg/cm2、23.70 U/(min·g)和2.87 lg CFU/g。气调包装能够抑制鲜切茄子的褐变、萎蔫等感官品质的下降,并抑制PPO活性的增加和细菌的生长繁殖,尤其在结合保鲜液处理后效果更加明显,贮藏8 d仍保持较好的品质。

    Abstract:

    Fresh-cut eggplant is popular with consumers because of its instance and hygiene, however, its shelflife is limited. To prolong the shelflife of fresh-cut eggplant, the effects were studied for modified atmosphere packaging (MAP, 2% CO2+5% O2+93% N2) and the combined treatment of preservative solution (1.5% chitosan+10% ascorbic acid+1% CaCl2+2% citric acid) and MAP on the quality of fresh-cut eggplant. The quality indices including sensory quality, browning degree, firmness, polyphenoloxidase (PPO) activity and total bacterial counts were detected during 10 days of storage at (10±1) ℃. After 8 days of storage, the L* value, firmness, PPO activity and total bacterial counts of the control sample were 7566, 7.41 kg/cm2, 68.77 U/(min·g) and 5.52 lg CFU/g, respectively. While the quality indices of the samples treated by the combined treatment were 82.51, 10.05 kg/cm2, 23.70 U/(min·g) and 2.87 lg CFU/g. The results indicated that MAP retarded the browning and softening of eggplant slices and the coating treatment prior to MAP enhanced the effectiveness. The fresh-cut eggplant treated by coating and MAP were still acceptable for cooking after 8 days of storage.

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谢晶,王肽,杨胜平.复合保鲜剂结合MAP对鲜切茄子贮藏品质的影响[J].食品与机械,2015,31(4):134-137.
XIEJing, WANGTai, YANGShengping. Effect of chitosan compound preservative combined with modified atmosphere packaging on quality of fresh-cut eggplant during storage[J]. Food & Machinery,2015,31(4):134-137.

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  • 收稿日期:2015-03-06
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  • 在线发布日期: 2023-03-30
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