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1、青島農(nóng)業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版)31(1):31~35,2014JournalofQingdaoAgriculturalUniversity(NaturalScience)文章編號(hào):1674—148X(2014)01—0031—05脂肪酶對(duì)饅頭外觀品質(zhì)的影響杜洋,趙陽,陳海華,史巖,張瀅瀅(1.青島農(nóng)業(yè)大學(xué)食品科學(xué)與工程學(xué)院,山東青島266109;2.山東農(nóng)業(yè)大學(xué)食品科學(xué)與工程學(xué)院,山東泰安271018)摘要:在分析測定脂肪酶對(duì)面團(tuán)流變學(xué)特性影響的基礎(chǔ)上,通過單因素試驗(yàn)研究了脂肪酶作用條件對(duì)饅頭外觀品質(zhì)的影響,并通過正交試驗(yàn)確定了脂肪酶對(duì)饅頭增白作用的最適工藝條件。結(jié)果表明,脂肪酶影
2、響面粉流變學(xué)特性和饅頭外觀品質(zhì)。脂肪酶使面團(tuán)吸水率、筋力增加,加丁時(shí)間延長。適量添加脂肪酶有利于饅頭成型,但添加過量會(huì)使面團(tuán)耐攪揉性、延展性和抗拉伸性減弱,不利于饅頭脹發(fā)。正交試驗(yàn)結(jié)果表明,脂肪酶對(duì)饅頭增白作用的最適條件為,脂肪酶添加量3mg/kg,面團(tuán)pH值為6.25,面團(tuán)調(diào)制溫度為33℃,此時(shí)饅頭白度可達(dá)87.21。關(guān)鍵詞:脂肪酶;饅頭;面粉;形態(tài);白度中圖分類號(hào):TS211文獻(xiàn)標(biāo)識(shí)碼:AD0I:10.3969/J.ISSN.1674—148X.2O14.01.008EffectofLipaseontheAppearanceQualitiesofChineseSteamedBr
3、eadDUYang,ZHAOYang,CHENHaihua~,SHIYan,ZHANGYingying(1.CollegeofFoodScienceandEngineering,QingdaoAgriculturalUniversity,Qingdao266109,China;2.CollegeofFoodScienceandEngineering,ShandongAgriculturalUniversity,Tai’an271018,China)Abstract:Bastedonrheologicalpropertiesofwheatflourwithlipase,effects
4、oflipaseontheappearancequalitiesofChinesesteamedbreadwereinvestigatedbyfarinograph,extensographandcolorimeter.Theresultsshowedthat,rheologicalpropertiesofthedoughandappearancequalitiesofChinesesteamedbreadweresignificantlyinfluencedbylipase.Waterabsorptionofthedoughwasincreasedbylipase.Shaping
5、ofChinesesteamedbreadwasenhancedwithlipaseatsuitableamount.However,stabilityandextensibilityOfdough,aswellasvolumeofChinesesteamedbreadweredecreasedwhenamountoflipasewashigherthan3mg/kg.TheresultsoforthogonaltestshowedthattheoptimumwhiteningtechnologyofChinesesteamedbreadwithlipasewereasfollow
6、s:lipaseof3mg/kg,pHof6.25,temperatureof33℃.Undertheseconditions,whitenessofChinesesteamedbreadreached87.21.Keywords:lipase;Chinesesteamedbread;wheatflour;shapeproperties;whiteness饅頭起源于中國,距今已有l(wèi)700多年歷史,是等_s的研究表明,脂肪酶能有效改善面包粉流變特我國北方人民食用最多的面制品,體積大、形態(tài)高性,提高面包焙烤品質(zhì),改善面包的硬度和彈性。王挺、色澤潔白的饅頭受到人們歡迎l】]。隨著生物技學(xué)
7、東研究表明面包粉中適量添加脂肪酶,可顯著術(shù)的不斷發(fā)展,運(yùn)用新型酶制劑來改善面制品品質(zhì)改善面包粉的拉伸特性、提高面包品質(zhì)。LarisaE7]成為國內(nèi)外研究的熱點(diǎn)_2]。面粉中含有約1.4~通過色差儀分析表明面包中添加脂肪酶后,面包光2.0的脂肪,脂肪的氧化能夠促進(jìn)面團(tuán)中二硫鍵的澤及白度明顯改善。Keskin等和ParkE9_等發(fā)現(xiàn),形成,改善面筋網(wǎng)絡(luò)結(jié)構(gòu)]。面粉中類胡蘿卜素等一定量的脂肪酶能夠增大面包的比容,同時(shí)改善面脂溶性色素的氧化,有助于提高面制品的白度_4]。包的