资源描述：
《Influence of Grape-Harvesting Steps on Varietal Thiol Aromas in》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、ARTICLEpubs.acs.org/JAFCInfluenceofGrape-HarvestingStepsonVarietalThiolAromasinSauvignonblancWinesThomasAllen,MandyHerbst-Johnstone,MelanieGirault,PaulButler,GerardLogan,SaraJouanneau,LauraNicolau,andPaulA.Kilmartin*WineScienceProgramme,SchoolofChemicalSciences,TheUniversityofAuckland,P
2、rivateBag92019,Auckland,NewZealandABSTRACT:TheintensetropicalfruitaromaofSauvignonblancwineshasbeenassociatedwiththevarietalthiols3-mercapto-hexanol(3MH),derivedfromodorlessprecursorsinthegrape,and3-mercaptohexylacetate(3MHA),arisingfrom3MHduringfermentation.Grapesandjuiceweresourcedfro
3、mfivelocationsinMarlborough,NewZealand,takinghand-pickedgrapesandsamplesatfourstagesduringthemechanicalharvestingprocessandpressing,whichwerethenfermentedinreplicated750mLbottles.Witheachsetofjuices,thehighestconcentrationsofCys-3MHandGlut-3MHwerefoundinthejuicespressedto1bar,butthesejui
4、cesproducedwineswithlower3MHand3MHAconcentrations.Withthreeofthejuices,therewasanincreaseinvarietalthiolcontentforwinesmadefromjuicesthathadbeenmachineharvestedcomparedtothehand-pickedsamples,whichmatchedearlierfindingsoflower3MHand3MHAlevelsinwinesmadefromhand-pickedgrapes.Juicesthatwer
5、emoreoxidized,andwhichshowedahigherabsorbanceat420nm,werefoundtoproducewineswithlower3MHand3MHAconcentrations.KEYWORDS:Sauvignonblanc,winearoma,varietalthiols,3-mercaptohexanol,3-mercaptohexylacetate,harvesting10’INTRODUCTION3MHinSauvignonblancwine.Likewise,thedirectadditionofArangeofar
6、omaprofilesispresentedbySauvignonblancasulfurcompound,possiblyH2S,to(E)-2-hexenalhadbeen11previouslyexaminedasanalternativepathway,butthiswasalsowines,fromgreenercapsicumandasparagusnotes,flintyandshowntocontributeonlyasmallamountofthe3MHpresentinmineralcharacters,throughtothemoretropical
7、andfruity12thefinalwine.InarecentstudyfromtheMontpelliergroupitaromastypicalofgrapefruitandpassionfruit.ThevarietalthiolswasconfirmedthatCys-3MHandGlut-3MHarelocatedpre-3-mercaptohexanol(3MH)and3-mercaptohexylacetateferentiallyinthegrapeskin,leadingtogreaterextractionatthe(3MHA)a
