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ID:9381656
大小:827.23 KB
页数:7页
时间:2018-04-29
《发芽大麦茶制备工艺及茶汤营养特性研究》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、发芽大麦茶制备工艺及茶汤营养特性研究雄*张端莉,桂余,刘(西南大学食品科学学院,重庆400716)摘要:发芽后的大麦中还原糖和氨基酸含量得到很大提高,故以发芽大麦为原料,研制发芽大麦茶制备工艺。在单3因素的基础上,通过水浸出物和感官评分两个指标综合考虑,设计L9(3)两个指标的正交设计,对制备工艺进行优化,得出最佳工艺。结果表明发芽大麦茶的最佳加工工艺:发芽时间3d,烘烤时间25min,烘烤温度170℃。此时的发芽大麦茶水浸出物含量为1.667g/100mL。烘烤温度和时间直接制约着大麦茶茶汤营养成分的损失,温度越高,时间越长,营养成分损失
2、量就越大。在最佳烘烤条件(170℃,25min)制作下,蛋白质(0.3%)、氨基酸(0.32%)、还原糖(6.32%)和β-葡聚糖(0.49%)含量较低,但此条件下有一部分可溶性物质增加,如可溶性糖(3.84%)和可溶性膳食纤维(8.90%),分别增长了8.3%和38.2%,且此烘烤温度和时间下其感官综合评价最佳,其麦香味浓、茶汤色泽棕黄透亮、滋味纯正,回味悠长。关键词:发芽大麦茶,加工工艺,茶汤,营养成分Studyonprocessoptimizationforgerminationbarleyteaandthenutritionchar
3、acteristicsofteainfusionZHANGDuan-li,GUIYu,LIUXiong*(CollegeofFoodScience,SouthwestUniversity,Chongqing400716,China)Abstract:Thereducingsugarandaminoacidscontentinbarleyhavebeengreatlyimprovedaftergermination,itcouldbesubstantiallyextendediftheirflavourpropertiesandflavour
4、stabilitywerebetterknown.Sothispapertookaresearchintothegerminationbarleyteawiththebarley.Theoptimalprocessofgerminationbarleyteawasobtainedusingdouble-indexorthogonalexperiment.Itisaqueousextractandsensoryscoreofthegerminationbarleyteainfusion.Theresultsshowedasfollows,ge
5、rminationtimewas3days,roastingtimewas25minutes,roastingtemperaturewas170℃.Andthecontentofaqueousextractcontentwas1.667g/100mL.However,roastingtemperatureandtimedirectlydeterminedthenutrientdamageofthebarleyteainfusion.Meanwhile,thehigherthetemperature,thelongertheroastingt
6、ime,themorenutrientinthebarleyteainfusionlost.Whenroastingtemperatureandtimewas170℃,25min,thecontentsofproteins,aminoacids,reducingsugar,β-glucanwerelowerthanotherconditionsinthebarleyteainfusion,theywere0.3%,0.32%,6.32%and0.49%respectively.Butthepartsofthesolublesubstance
7、sincreasedonthiscondition,suchas:solublesugarwas3.84%,solubledietfiberwas8.90%,andtheyhaveincreasedby8.3%and38.2%respectively.Withtheprescription,organolepticevaluationofthegerminationbarleyteawasthebest.Andithadaclearcolourandalingeringaftertaste.Keywords:germinatedbarley
8、tea;processingtechnology;teainfusion;nutritionalingredient中图分类号:TS213.3文献标识码:B文章编号:1002-0
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