vinopro39;tm酶對白葡萄酒蛋白穩(wěn)定的作用

1、中國農(nóng)業(yè)大學(xué)碩士學(xué)位論文VinoPro酶對白葡萄酒蛋白穩(wěn)定的作用姓名：馬妍妍申請學(xué)位級別：碩士專業(yè)：食品生物技術(shù)指導(dǎo)教師：段長青20060601AbstractTheproteinstabilityofwhitewineaffectsthesensoryqualityseverelyThematuremethodinmodemwinemakingistoUSethebentoniteassorbentHoweverithasmanysh

2、ortcomingsThepaperaimedatusingbiologicalmethodtoachievetheproteinstabilizationinWhitewineByusingtheseveralkindsofwhitejuicefromdifferentvarieties，yearsandregions，andtheChardormaywineoftwoyears，andbyusingthemethodsofdetec

3、tingtheproteinstabilityandproteincharacterization，thefunctionofVPonproteinstabilizationofwhiteiuiceandwhitewineinthephasesofyeastfermentationandagingwerestudiedThepaperisalsotofindoutthebeststageinwhichtheenzymeshouldbea

4、ddedanddemonstratewhichkindsofproteinswerefunctionedbyitAftertheenzymewasaddedtothewhitejuiceandkeptin35℃for36or48hours，thecontentofproteininmostsamplesdeclinedsignificantlyandtheclarityofjuicewasimprovedgreatlycomparing

5、withthesamplewithouttheadditionoftheenzymeAftertheheattest，thetotalproteinconcentrationofmostsamplestreatedwiththeenzymewasalmostthesameastheuntreatedsamples，theirclaritywashigherandtheheatinducedhazeformationwaslesserth

6、antheuntreatedonesForthesamplesof2004，thebentonitelevelnecessaryforclarifyinghazetoguaranteetheproteinstabilityinwinewhichwasaddedwiththeenzymeinitsphaseofyeastfermentationwasmuchlowerthanthatoftheuntreatedwineForthesamp

7、lesof2005，therewasnosignificantdifferencebetweenthenecessarybentonitelevelsoftreatedsampleandtheuntreatedoneHowevertheirproteinconcentrationandtheheatinducedhazeformationhadsignificantdifferenceMaybeitwasbecausetheadditi

8、onlevelofenzymewasnothiighenough11llebentonitelevelnecessaryforclarilyinghazetoguaranteetheproteinstabilityinwinewhichwasaddedwiththeenzymeinitsagingphaseandstoredfor2to3monthswasmuchlowerthanthatoftheuntreatedwineThecon

9、tentofproteinandheatinducedhazeformationinthetreatedwinewassignificantlylowerthanthatoftheuntreatedoneTheresultsaboveshowedthatVPcouldhydrolyzepartofheatunstablejuiceproteinsandactedlittletotheheatstableones111eenzymeals