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《乳酸菌适宜生长的盐度（the optimum salinity of lactic acid bacteria）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、乳酸菌适宜生长的盐度（Theoptimumsalinityoflacticacidbacteria）Thegrowthcharacteristicsofthe3strainsshowedthattheirgrowthtemperaturerangewaswide,andthestraincouldgrownormallyattheoptimumgrowthtemperatureof32DEGCandtheoptimumgrowthofpH6.0andNaClcontentwaslessthan4.5%.Thefermentat
2、ionexperimentsshowedthatthemixedbacteriacouldeffectivelyreducenitritecontent,andtheflavorofpickledvegetableswasclosetothatofnaturalfermentation,anditsstabilitywasbetterthanthatofnaturalfermentation.Conclusion:theresultscanprovidethebasisfortheindustrialproductionofp
3、ickledvegetablesinoculatedartificially.Theoptimumgrowthtemperatureis37DEGCandnotlowerthan20DEGC,andtheheatresistanceispoor.ThemostsuitablegrowthPH5.5~6.0,whichcangrowinPH<=5environment,hasstrongacidresistanceandcangrowandpropagateinacidicenvironmentwhereotherlactica
4、cidbacteriacannotgrow3.Theantisepticfunctionofacidityandacidityinpicklingenvironmenthavegreatinfluenceontheactivityofmicroorganism.Theconcentrationofaceticacidin1%above,caninhibitspoilagebacteria,Escherichiacoli,butyricacidbacteriaactivity,onlylacticacidbacteria,yea
5、stsandmoldscanactivityinacidcondition,butthefirsttwokindsofbacteriaarebeneficialtohumanbody,cankillotherbacteria,preservedpicklesisnotbad.Inordertoinhibittheactivitiesofsomeharmfulmicroorganisms,itisnecessarytorapidlyimprovetheacidityofthepicklingenvironmentatthebeg
6、inningofcuring.Generally,thefollowingmethodscanbeadopted:first,addingproperamountofvinegaratthebeginningofcuring;second,appropriatelyraisingthetemperatureattheinitialstageoffermentation,andpromotingtherapidgenerationoflacticacid;third,addingsaltinbatches.4,theinflue
7、nceoftemperatureonmicroorganisms,allmicrobialgrowthanddevelopment,thereisacertaintemperatureneeds.Theoptimumtemperatureoflacticacidbacteriaactivitywas26-30.Thefermentationofsourcabbagecanbedonein25-30degreesbetween6and8days.Picklesfermentationspeedisgovernedbytemper
8、ature,inordertomaketheproductflavornormal,fermentationtemperatureshouldnotbeintheprocessofpicklingistoohigh,thebestmaintainedatbetween12-2
