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食品与发酵工业  2021, Vol. 47 Issue (20): 204-211    DOI: 10.13995/j.cnki.11-1802/ts.027003
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自发气调包装和短波紫外线处理对鲜核桃仁保鲜效果的影响
万杨卓群, 李书影, 刘方玥, 李绪源, 陈强, 马惠玲*
(西北农林科技大学 生命科学学院,陕西 杨凌,712100)
Effects of modified atmosphere packaging and UVC treatment on preservation of fresh walnut kernel
WAN Yangzhuoqun, LI Shuying, LIU Fangyue, LI Xuyuan, CHEN Qiang, MA Huiling*
(College of Life Science, Northwest A&F University, Yangling 712100, China)
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摘要 以‘香玲’核桃为试材,研究鲜核桃仁的低温货架保鲜方法。采用保鲜膜、真空包装为2种对照(CK1、CK2)下的4种自发气调包装和散射光为对照(CK)下的4种剂量短波紫外线(ultraviolet radiation C,UVC)处理,测定包装袋内O2和CO2体积分数、核桃仁质构参数、微生物数量的变化,筛选出0.03 mm的聚乙烯、1 kJ/m2 UVC分别为包装和杀菌的最佳参数。2种最佳参数下分别单独处理、复合处理,(5±0.5) ℃货架贮藏,定期观测相关生理与品质指标,微生物数量,得出货架21 d时各处理与对照品质几乎没有差异,且未测出霉菌;56 d时复合处理较2种单独处理更显著地降低了丙二醛含量和酸价(P<0.05),提高了消费者接受度;总酚、油脂、蛋白质含量未受影响,可溶性糖含量有所下降;霉变发生于第70天,较对照推迟10 d。各处理均不同程度地抑制了磷脂酶D、脂氧合酶活性,确定了处理通过抑制脂类降解促进核桃仁品质保持的生理依据。
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万杨卓群
李书影
刘方玥
李绪源
陈强
马惠玲
关键词:  鲜核桃仁  自发气调包装  短波紫外线  核桃仁品质    
Abstract: The preservation of fresh walnut kernels during low temperature shelf was studied using fresh walnut kernels of ‘Xiangling’ as raw material. Four modified atmosphere packaging (MAP) treatments and four dosages of short-wave ultraviolet radiation C (UVC) were adopted to treat the fresh shelled kernels with food wrapping film (CK1), vacuum packaging (CK2), and scatter light treatment (CK) was used as control. According to results of the changes of O2 and CO2 concentration in each treatment, texture parameters, sensory quality and microorganism number of kernels from each treatment, 0.03 mm polyethylene 30(PE30) and 1 kJ/m2 UVC was selected as the best parameters respectively for packaging and sterilization. Then, walnuts were treated with MAP and UVC, separately, and in combination under each best parameter, stored at (5±0.5) ℃ to observe the changes of related physiology, quality and microorganisms during shelf life at a low temperature. The results showed that there were no significant differences on the tribute between these treatments with control on 21th day, and no mold was detected. Moreover, on 56th day, the compound treatment acted priorly to each separate one, which significantly reduced both the content of malondialdehyde (MDA) and acid value (P<0.05) than control. However, the content of total phenol, oil and protein was not affected by the treatment, and the soluble sugar was decreased (P<0.05). Furthermore, the visible mold appeared till on the 70th day, which 10 days later than control. The compound treatments also inhibited the activities of phospholipase D (PLD) and lipoxygenase (LOX) stronger than the other two treatments, providing the physiological basis of combined MAP and UVC maintained the quality of fresh kernels through the inhibition of membrane degradation.
Key words:  fresh walnut kernel    modified atmosphere packaging    ultraviolet radiation C    kernel quality
收稿日期:  2021-02-08      修回日期:  2021-03-11           出版日期:  2021-10-25      发布日期:  2021-11-18      期的出版日期:  2021-10-25
基金资助: 林业科技成果国家级推广项目(【2016】44)
作者简介:  本科生(马惠玲教授为通讯作者,E-mail:hl65@nwafu.edu.cn)
引用本文:    
万杨卓群,李书影,刘方玥,等. 自发气调包装和短波紫外线处理对鲜核桃仁保鲜效果的影响[J]. 食品与发酵工业, 2021, 47(20): 204-211.
WAN Yangzhuoqun,LI Shuying,LIU Fangyue,et al. Effects of modified atmosphere packaging and UVC treatment on preservation of fresh walnut kernel[J]. Food and Fermentation Industries, 2021, 47(20): 204-211.
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http://sf1970.cnif.cn/CN/10.13995/j.cnki.11-1802/ts.027003  或          http://sf1970.cnif.cn/CN/Y2021/V47/I20/204
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