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投稿时间:2018-10-09
投稿时间:2018-10-09
中文摘要: 研究高压脉冲电场(pulsed electric field,PEF)强化杀菌方法对哈密瓜汁微生物指标和理化品质的影响。温和热协同PEF处理(20 kV/cm+55℃)与热处理(90℃)具有一致的杀菌效果,均能使哈密瓜汁在4℃的保藏期达到15 d。热处理(90℃)显著影响哈密瓜汁的电导率、可溶性固形物含量、浊度以及色泽(P<0.05),使VC含量降低34.97%,而温和热协同PEF处理(20 kV/cm+55℃)除显著影响哈密瓜汁的浊度外(P<0.05),对其他理化指标基本无影响,因此PEF强化杀菌方法在哈密瓜汁的生产中具有重要的应用价值。
中文关键词: 高压脉冲电场(PEF) 冷杀菌 哈密瓜汁 微生物指标 理化品质
Abstract:The effects of high voltage pulsed electric field (PEF)on microbiological index and physical and chemicalqualityofHamimelonjuicewerestudied.ThemildthermalsynergisticPEFtreatment(20kV/cm+55℃)and heat treatment(90℃)had the same effect of sterilization.They both could achieve a storage period of 15 d at 4℃.Heat treatment(90℃)significantly affected the conductivity,soluble solids content,turbidity and color of Hami melon juice (P <0.05),reducing the VCcontent by 34.97%.However,the mild thermal synergistic PEF treatment(20 kV/cm+55 ℃)had no effect on other physical and chemical indicators except that it significantly affected the turbidity of the Hami melon juice (P<0.05).Therefore,PEF enhanced sterilization method had an important application value in the production of Hami melon juice.
keywords: high voltage pulsed electric field cold sterilization Hami melon juice microbiological index physical and chemical quality
文章编号:201917019 中图分类号: 文献标志码:
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