冷凍干燥機對長雙歧桿菌損傷作用的研究
冷(leng)(leng)凍(dong)(dong)(dong)(dong)(dong)干(gan)(gan)(gan)燥(zao)(zao)(zao)機(ji)的(de)冷(leng)(leng)凍(dong)(dong)(dong)(dong)(dong)干(gan)(gan)(gan)燥(zao)(zao)(zao)是乳酸(suan)(suan)菌和(he)益(yi)生菌干(gan)(gan)(gan)燥(zao)(zao)(zao)的(de)主要方式,冷(leng)(leng)凍(dong)(dong)(dong)(dong)(dong)和(he)干(gan)(gan)(gan)燥(zao)(zao)(zao)2個過(guo)(guo)(guo)(guo)程(cheng)都會(hui)影(ying)(ying)響菌體細(xi)胞(bao)的(de)存活率,探(tan)討冷(leng)(leng)凍(dong)(dong)(dong)(dong)(dong)和(he)干(gan)(gan)(gan)燥(zao)(zao)(zao)過(guo)(guo)(guo)(guo)程(cheng)對長(chang)雙歧(qi)桿菌的(de)損傷作用有利于指導高存活性(xing)益(yi)生菌粉的(de)生產(chan)。真空冷(leng)(leng)凍(dong)(dong)(dong)(dong)(dong)干(gan)(gan)(gan)燥(zao)(zao)(zao)機(ji)采用透射電鏡觀察菌體在冷(leng)(leng)凍(dong)(dong)(dong)(dong)(dong)干(gan)(gan)(gan)燥(zao)(zao)(zao)過(guo)(guo)(guo)(guo)程(cheng)中的(de)微結構,通(tong)過(guo)(guo)(guo)(guo)溢出胞(bao)外(wai)的(de)β-半乳糖苷酶活性(xing)評價(jia)冷(leng)(leng)凍(dong)(dong)(dong)(dong)(dong)和(he)干(gan)(gan)(gan)燥(zao)(zao)(zao)后細(xi)胞(bao)膜(mo)通(tong)透性(xing)的(de)變化,通(tong)過(guo)(guo)(guo)(guo)測定冷(leng)(leng)凍(dong)(dong)(dong)(dong)(dong)和(he)干(gan)(gan)(gan)燥(zao)(zao)(zao)后胞(bao)內Na和(he)K濃(nong)度的(de)變化研究離子(zi)效(xiao)應的(de)影(ying)(ying)響。濃(nong)縮型凍(dong)(dong)(dong)(dong)(dong)干(gan)(gan)(gan)酸(suan)(suan)奶發(fa)酵劑制備(bei)的(de)關鍵技術(shu)進(jin)行了(le)深(shen)入研究,包括:選育(yu)發(fa)酵性(xing)能優(you)良、抗冷(leng)(leng)凍(dong)(dong)(dong)(dong)(dong)干(gan)(gan)(gan)燥(zao)(zao)(zao)性(xing)強、后酸(suan)(suan)化力弱的(de)乳酸(suan)(suan)菌菌種(株),...