武夷岩茶乳酸菌发酵饮料开发的的研究

《武夷岩茶乳酸菌发酵饮料开发的的研究》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、PreparationofWuyiRockTeaLactobacillusFermentedBeverageAbstractInthisstudy，Wuyirockteawasselectedastheobjectofreserch，activeconstituentsintheteawereextractedbytheultrasonicmethod，Multifuntionallacticeacidfermentedteabeveragewaspreparedbyproperlacticacidfermentationtechnolgy．砀ebevragehadtheheal

2、thcarefunctionofWuyirockteaandcontainedlaetobacillus，notonlyhadtheoxidationresistencefunctionofrockteabeenpreserved，butalsohaditshealthcarefunctionbeenincreased，itsflavorandtastewasspecial，itscommercialvalueWasexpectedtobeincresed．Gallocatechingallate(GCG)andcaffeine，twomainactiveingredientsi

3、nWuyirocktea，theirvariationbeforeandafterfermentationhadbeenstudied．Theirinfluenceontheoxidationresistanceactivity：eliminateDPPHfreeradical(DPPH。)，superoxideanion(02。．)andchelationferrousion(FEC)hadbeeninvestigatedalso．Mainresultswereasfollows：(1)RockteaextractionwasinoculatedwithStreptococcu

4、sthermophilus，fermentedatthetemperatureof37"C，theoptimalfermentationtimeWas48h，viablecountswerehighest，whichreachedto2．24x109cfu／mL．(2)HighPerformanceLiquidChromatographyanalysisindicatedthat：wheninoculationquantitywas6．8E+03cfu／mL，theconcentrationsofGCGandcaffeinereachedtohighestlever，whichw

5、as0．25mg／gand16．76mffgrespectively，andbothwerelowerthanunfermentedbeverage(O．29mg／gand18．23mg／grespectively)，theconcentrationofGCGhadtendencyofdecreasewiththeincreaseinthequantityofinoculationlactobacillus，whilethedecreaseincaffeninWasnotobvious．(3)Oxidationresistanceactivityanalysisindicated

6、that：duringtheconcentrationextentof250～4000ppm，theabilityofteaextractiontoeliminateDPPHfreeradicalsuperoxideanionandchelationferrousionwas93．78％、96．65％and85．67％relatively．啪lileafterfermentationbylactobacillus，theOxidationresistanceactivitydecreasedto89．74％、87．71％and85．67％relatively．(4)neresea

7、rchdevelopmentoflacticacidfermentedteabeverageofthemainratiofor：85％tealiquid，8％milkpowder,5％lacticacidbacteriainoculationamount(6．8E+03cfu／mL)，¨2％otheringredients．Aftertheexamination，themainfunctionalconstituentsinthebeverageweTe：82．04mg／gtea