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Modelling the survival of starter lactic acid bacteria and Bifidobacterium bifidum in single and simultaneous cultures

机译：模拟单一和同时培养中的发酵乳酸菌和双歧双歧杆菌的存活率

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摘要

The inactivation kinetics at 4 ℃ of Bifidobacterium bifidum, Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus, cultured alone or consociated in a laboratory medium (modified MRS broth), were modelled through the Weibull model and a second-order polynomial equation. The initial cell number of S. thermophilus and L delbrueckii subsp. bulgaricus was approximately 6-7 log (CFU/ml); the viability loss after 30 days of storage was 2.87 and 1.99 log (CFU/l) for L delbruckii subsp. bulgaricus and S. thermophilus, cultured alone, respectively; whereas the consociation of lactobacilli and streptococci with bifidobacteria reduced viability loss during storage (0.28 and 0.54 log CFU/l for lactobacilli and streptococci, respectively).rnFinally, the consociation of lactobacilli and streptococci with B. bifidum improved their oxygen uptake.
机译：双歧双歧杆菌德氏乳杆菌亚种在4℃下的失活动力学。通过Weibull模型和二阶多项式方程对单独培养或在实验室培养基（改良MRS肉汤）中联合培养的保加利亚和嗜热链球菌进行建模。嗜热链球菌和德氏乳杆菌亚种的初始细胞数。保加利亚约为6-7 log（CFU / ml）；贮藏30天后，德氏布鲁克亚种的活力损失为2.87和1.99 log（CFU / l）。保加利亚和嗜热链球菌，分别单独培养；乳酸菌和链球菌与双歧杆菌的结合减少了贮藏期间的活力损失（乳酸菌和链球菌分别为0.28和0.54 log CFU / l）。最后，乳酸菌和链球菌与双歧杆菌的结合提高了它们的摄氧量。

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