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1、毕业设计（论文）专业译文题目：有效检测控制啤酒双乙酰含量的要求和措施姓名：吴滔学号：200902020129系别：应用化学系班级：生化0911指导教师：刘军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
