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1、畢業(yè)設(shè)計(jì)（論文）專業(yè)譯文題目：有效檢測(cè)控制啤酒雙乙酰含量的要求和措施姓名：吳滔學(xué)號(hào)：200902020129系別：應(yīng)用化學(xué)系班級(jí)：生化0911指導(dǎo)教師：劉軍2011年10月16日英文：TitleEffectivedetectionandcontrolofbeerdiacetylcontentrequirementsandmeasuresChooseaneffectivedetectionmethodisameasureofbeerflavordiacetylgoodindicatorsofwhetherornotdecisive?Diacet
2、ylcontentinbeerthanitstastethreshold,willbringthebeertasteunpleasantrancidfood,agreaterimpactonbeerflavor.Poorqualityofbeertendtohavehigherlevelsofdiacetyl.Asthesmellofdiacetylinbeerlowthreshold,therefore,theimplementationofestablishedmaturetechnology,someseeminglyminoroper
3、ationalerrorscancauselargefluctuationsindiacetylcontentandevenexceeded.Inviewofthis,thecontrolintheproductionofdiacetylcontentalonerationalprocessisnotenough,theproductionmustalsobeanimportantpartofeffectivedetectionandmonitoring.Meanwhile,thediacctylprecursora-acetolactate
4、oxidationofacetylepigeneticpairs,iftheircontentistoohigh,oftenresultinginexcessiverebounddiacetylfinishedbeer,affectproductquality.Therefore,inordertoensuretheshelflifeofmanufacturedproductsinthediacetylcontentofqualified,intheactualproductiontestonlyformonitoringtheimpleme
5、ntationofdiacetylisunreasonable,andmustfordiacctylandthetotalamountofa-acetolactateimplementation,monitoringtoensureproductquality.Twopairsofacetyl1.1Comparisonofdetectionmethods1.1.1MethodoneSamplesdirectlyinbeerbyGB4927-2001TestMethodforDeterminationofdiacetyl.1.1.2Method
6、twoPretreatmentofthesample:lowtemperature(lessthan5°C)underthebeakerwithtwothinstreambackandforthtodump5times(toincreaseoxygencontentinwine),thetransferofliquortoaclosedcontainer,waterbathat60°Cfor1h(thevastmajorityofa-acetolactateinthehightemperaturereactionofdiacetylwitho
7、xygen),andthenwinecooling(note:notthelossofthesamplepretreatmentprocessdiacetyl).Finally,thepretreatmentofthesampleaccordingtoGB4927-2001methodofdeterminationofdiacetylcontent.1.1.1AnalysisandcomparisonoftwomethodsMethodOnemeasureofwineitselfcontainsdiacetylanddiacetylinthe
8、experimentaloperationoftheliquorfroma-acetolactateintodiacetylintwoparts.Which,byt
