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1、[摘要]目的:探討嗜酸乳桿菌培養(yǎng)條件,研制出一種菌活性高、密度大、操作簡(jiǎn)便、易于生產(chǎn)應(yīng)用的發(fā)酵工藝,闡明乳酸菌肓投式發(fā)酵劑的生產(chǎn)和應(yīng)用。方法:選取嗜酸乳桿菌屮國株為菌種,根據(jù)培養(yǎng)基成分的配比不同,分為實(shí)驗(yàn)組和對(duì)照組,優(yōu)化培養(yǎng)條件以及MRS液體培養(yǎng)基的配方,通過紫外分光光度計(jì)檢測(cè)菌液的吸光度(A650)值和活菌數(shù)量變化,篩選出報(bào)優(yōu)的T藝過程。結(jié)果:通過篩選確定嗜酸乳桿菌的最佳培養(yǎng)條件是接種量1%,初始pll值6.2,37°0叵溫厭氧培養(yǎng)23h;?適培養(yǎng)基配方為3?5%蛋白豚、0.5%酵母提取物、2%葡萄糖、0?2%檸檬酸僅、
2、0?088%磷酸氫二鈉、0?6%乙酸鈉、0?025%硫酸猛、0?06%硫酸鎂、1%營(yíng)養(yǎng)因了和0?1%吐溫80;由報(bào)適培養(yǎng)工藝培養(yǎng)得到的菌種數(shù)可達(dá)1.43X1011cfu?mL-1,較傳統(tǒng)培養(yǎng)方案相比菌種數(shù)增長(zhǎng)約1X1011c『u?mL-1,且工藝簡(jiǎn)便易行。結(jié)論:實(shí)現(xiàn)對(duì)嗜酸乳桿菌培養(yǎng)條件和培養(yǎng)基配方的優(yōu)化,得到嗜酸乳桿菌最優(yōu)培養(yǎng)工藝條件,菌種的高密度培養(yǎng)可用于乳酸菌肓投式發(fā)酵劑的制備和應(yīng)用。[關(guān)鍵詞]嗜酸乳桿菌;高密度;培養(yǎng)條件;優(yōu)化;T藝[Optimizationandevaluationofprocessconditio
3、nofhighdensityevecu1tureofLactobaci1lusacidophilusandhighbigdensitysimplecationandt0c1arifythePr0duct0nandaPp1idbacter1a?MethodsL?11usstra?1n0fCh?1nese1ectedcationof1actcacactobac?111usacid0phsestra?nswereaccordingtotheproportionofdifferentmediumcomponentsexperime
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6、anesesu1fatemagnesiumsulfate0.06%1%nutritionfactor1%Twain80henumbandthep103第29卷第5期2013年9月士口Lactobaci11us■?highdensityacidophi1us(醫(yī)J0urna10fJ■11?1nUn?(Med?1c?1neEd?1t?0n)V01?39No.5sep■2013easy?c0nc1usm■1zat■10n0fcu1tureremed?1um0fLact0ba版)versity10nThroughthe0ptic0
7、nd?1tionsandcu1tuc11usac?1d0Phi1usthebestcu1ture11usacidophi1usconditionsofLactobaciareObtained1thehighsconduteddenstrainandatheoretica1f0t?10nandapP1icationer?1a?1s1a?1d.Keyw0rdsundationf0rPreparaof1acticacidbactprocess嗜酸乳桿菌屬于乳酸菌,乳桿菌屬,革蘭陽性桿菌,桿的末端呈圓形,主要存在小腸,釋放乳酸和一
8、些對(duì)有害菌起作用的抗素。嗜酸乳桿菌在人體整個(gè)胃腸道屮起調(diào)整腸道菌群平衡、抑制腸道不良微生物增殖的作用[1一21。嗜酸乳桿菌多應(yīng)用于酸奶、干酪和泡菜[3]等產(chǎn)品的發(fā)酵工藝,尤其是目前新興的果蔬飲品的發(fā)酵,是乳制品生產(chǎn)極其重要的菌種2—。嗜酸乳桿菌不僅能夠在發(fā)酵的過稈中產(chǎn)生乳酸,還能夠分解蛋白質(zhì)、形成風(fēng)味物