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1、现代食品科技ModernFoodScienceandTechnology2014,Vol.30,No.1气调包装对带叶荔枝褐变及品质的影响1,211111于茂兰,陈于陇,徐玉娟,吴继军,王生有,傅曼琴(1.广东省农业科学院蚕业与农产品加工研究所,广东省农产品加工公共实验室,广东广州510610)(2.广东海洋大学食品科技学院,广东湛江524088)摘要:本文研究了在高氧(100%O2)气调包装条件下,带叶荔枝的营养品质以及褐变相关酶活性的变化规律。结果表明:与对照组(空气包装)相比,高氧气调包装抑制了荔枝的呼吸强度,相对应其呼吸过程产生的二氧化碳(CO2)量下降,降低了带
2、叶荔枝贮藏前期和后期的褐变程度,显著抑制了过氧化物酶(POD)的活性,显著推迟了多酚氧化酶(PPO)活性高峰的出现,说明了带叶荔枝的褐变与POD、PPO两种酶有一定的相关性;在贮藏的前6d,可溶性蛋白、花色素苷和总多酚的含量都比对照低,但在贮藏期的第9和12d后,其含量比对照组要高;另外,高氧气调包装不利于荔枝汁维生素C(Vc)的含量的维持,而对可溶性固形物和可滴定酸的影响不明显。因此,高氧气调包装能够延缓带叶荔枝的褐变,但是不利于其果汁Vc含量的维持。关键词:带叶荔枝;高氧气调;褐变;品质文章篇号:1673-9078(2014)1-108-114EffectofHigh
3、OxygenAtmosphericPackagingontheBrowningandQualityofLitchiFruitswithLeavesYUMao-lan1,2,CHENYu-long1,XUYu-juan1,WUJi-jun1,WANGSheng-you1,FUMan-qin1(1.GuangdongKeyLaboratoryofAgriculturalProductProcessing,SericultureandAgro-foodProcessingResearchInstitute,GuangdongAcademyofAgriculturalScienc
4、es,Guangzhou510610,China)(2.Collegeoffoodscienceandtechnology,GuangdongOceanUniversity,Zhanjiang524088,China)Abstract:Thechangesofnutritionalqualityandactivitiesofbrowning-relatedenzymeswerestudiedinthelitchifruitswithleavesunderhighoxygenatmosphericpackaging.Comparedwiththecontrol(airpac
5、kaging),highoxygenatmosphericpackaginginhibitedrespiratoryintensityoflitchifruit,withdecreasingofformationofcarbondioxide(CO2).Thetreatmentreducedthedegreeofbrowningafterstorage.Peroxidase(POD)activityinthepericarpoflitchifruitwassignificantlylowerthancontrol,whilethemaximalactivityofpoly
6、phenoloxidase(PPO)wasmarkedlydelayed.ItwasillustratedthatthebrowningofthelitchifruitswithleaveshadcertaincorrelationwithPODandPPO.Thevariationtrendsofsolubleprotein,anthocyaninandtotalpolyphenolcontentsweresimilar:thecontentsofthemwerelowerthancontrolduringthefirst6daysofstorage.Butatday9
7、andday12,thecontentswerehigherthancontrol.VitaminC(Vc)inlitchijuicedecreasedsignificantlyunderhighoxygenpackaging,whilesolublesolidsandtitratableacidshowedlittlechanges.Therefore,highoxygenatmosphericpackagingwasbenefittothedelayofbrowning,butnotbenefitwiththemainte