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1、<文献翻译：原文>PreparationandcharacterizationofactivefilmsbasedonchitosanincorporatedteapolyphenolsAbstract:Activefilmsbasedonchitosanincorporatedteapolyphenolswithdifferentconcentrationsweredeveloped.AttenuatedtotalreflectanceFouriertransforminfraredspectrometrywasused
2、toinvestigatethepotentialinteractionsbetweenchitosanandteapolyphenolsinthefilms.Physicalpropertiesofthechitosanfilmsincorporatedteapolyphenols,includingdensity,moisturecontent,opacity,color,watersolubilityandwatervaporpermeability,weremeasured.Antioxidantactivityo
3、fthefilmswascharacterizedintermsoftotalphenoliccontentand2,2-diphenyl-1-picrylhydrazylfreeradicalscavengingactivity.Theresultsindicatedthattheincorporationofteapolyphenolscausedinteractionsbetweenchitosanandteapolyphenolsandgaverisetothefilmsdarkerappearance.After
4、theadditionofteapolyphenols,thefilmsshowedincreasedwatersolubilityanddecreasedwatervaporpermeability.Meanwhile,theincorporationofteapolyphenolsenhancedthetotalphenoliccontentand2,2-diphenyl-1-picrylhydrazylfreeradicalscavengingactivityofthefilms,i.e.,increasedthea
5、ntioxidantactivityofthefilms.Buttheantioxidantactivityofthechitosanfilmsincorporatedteapolyphenolsdeclinedwithtime.1.IntroductionTherehasbeenagrowinginterestinrecentyearstodevelopactivepackagingtoimprovefoodsafetyandshelflife.Principalactivefoodpackagingsinvolveox
6、ygenscavenging,moistureabsorption,carbondioxideorethanolgeneration,andantimicrobialsystems(Coma,2008).Oneofthecommonlyusedmethodstodevelopactivefoodpackagingistoincorporateactivecompoundsandingredients,suchasantioxidantsandantimicrobialagents,intopackagingmaterial
7、s,providingthepackagingsystemadditionalfunctionsthatdonotexistoriginally.However,concernsonconsumerhealthandenvironmentalissuesleadresearcherstodeveloptheactivefoodpackagingsbasedonbiodegradablematerialsandnaturalsubstances.Chitosan,anaturalcarbohydratecopolymer[b
8、-(1-4)-2-acetamido-a-glucoseandb-(1-4)-2-amino-a-glucoseunits]yieldedfromdeacetylationofchitin[poly-b-(1-4)-N-acetyl-2aglucosamine],isabiodegradable,non
