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1、ProcessingoffruitsInstructor:mingfengzheng(郑明锋)phd.Email:vanheng@163.comCell:13805095291注意：课件全部根据老师提供的ppt整理，在编号上可能会有些问题，所以大家将就着看，祝大家考试顺利。Chapterone：introductionFruitqualityandpreprocessingObjectsoThroughtheintroduction,thestudentsknowoTherelationshipbetweenq
2、ualityoffruitandtheprocessedproduct,oTherelationshipbetweencompositionoffruitandtheprocessedproduct,oQualityattributesoffreshfruits,andqualitymeasurementsopreprocessingmethodsandtechnologies1.1classificationoffruitsoFruitsarecommonlyclassifiedbygrowingregion
3、asfollows.Temperatezone,subtropical,andtropical.Growingregionandenvironmentalconditionsspecifictoeachregionsignificantlyaffectfruitquality.Examplesoffruitgrownineachregionarelistedbelow:1)temperatezonefruits2)subtropicalfruits3)tropicalfruits(1)temperatezone
4、fruitsoPomefruits(仁果类):apple,asianpear(nashi),europeanpear,quince榅桲果oStonefruits:apricot杏,cherry,nectarine,peach,plumoSmallfruitsandberries:grape(europeanandamericantypes),strawberry,raspberry,blueberry,blackberry,cranberry(2)subtropicalfruitsoCitrusfruits:g
5、rapefruit,lemon,lime,orange,pummelo,tangerine,andmandarinoNoncitrusfruits:avocado,cherimaya,fig,kiwifruit,olive,pomegranate(3)tropicalfruitsoMajortropicalfruits:banana,mango,papaya,pineappleoMinortropicalfruits:carambola,cashewapple,durian,guava,longan,lyche
6、e,mangosteen,passionfruit,rambutan1.2qualityofrawmaterialsoThequalityofprocessedfruitproductsdependsontheirqualityatthestartofprocessing;oHowmaturityatharvest,oHarvestingmethods,oPostharvesthandlingproceduresoMaintenanceinfreshfruitsbetweenharvestandprocessi
7、nitiation.QualityattributesoffreshfruitsoAppearance、exturefactors、flavorcomponents、nutritionalquality、safetyfactorsAppearancefactorsoSize、shape、color、freedomfromdefectsanddecay.Texturefactors93oFirmness,crispness,juiciness.FlavorcomponentsoSweetness,sourness
8、(acidity),astringency,(收敛),bitterness,aroma,off-flavors,NutritionalqualityoFruit'scontentofvitamins(aandcarethemostimportantinfruits),minerals,dietaryfiber,carbohydrates,proteins.SafetyfactorsoR
