TY - JOUR T1 - Effect of bacteria proportion on the fermentation of goat yoghurt with probiotic culture A1 - Guowei Shu A1 - Shuai Wang A1 - Zikun Chen A1 - He Chen A1 - Changfeng Wang A1 - Yaning Ma JO - Acta Sci. Pol. Technol. Aliment VL - 14 IS - 4 SP - 407-414 Y1 - 2015 UR - https://www.food.actapol.net/volume14/issue4/12_4_2015.pdf SN - 1644-0730 KW - goat milk, bacteria proportion, L. acidophilus, B. bifidum, L. casei, yoghurt AB - Background. Goat milk production in Shaanxi province is dominant in China, but the product is mainly infant formula and adult milk powder; product homogeneity is serious and has no goat yoghurt with probiotic culture. Methods. The effect of bacteria proportion (1:3:1, 1:2:1, 1:1:1, 2:1:1, 3:1:1) on pH, acidity, and viable counts and sensory evaluation of goat milk fermented by probiotics including L. acidophilus, B. bifidum  or L. casei besides, S. thermophilus and L. bulgaricus for developing AB-goat yoghurt and BC-goat yoghurt was investigated. Results. The optimum bacteria proportion of L. acidophilus : B. bifidum : S. thermophilus and L. bulgaricus for AB-goat yoghurt and B. bifidum : L. casei : S. thermophilus and L. bulgaricus for BC-goat yoghurt were both 2:1:1. The pH, acidity, the viable counts of L. acidophilus and B. bifidum, the total viable counts were respectively 4.60, 7.73 (g/L), 3.50×107 cfu/mL, 3.40×107 cfu/mL and 2.30×109 cfu/mL in AB-goat yoghurt. The pH, acidity, the viable counts of B. bifidum and L. casei, the total viable counts were respectively  4.61, 8.16 (g/L), 7.60×107 cfu/mL, 5.60×107 cfu/mL and 2.04×109 cfu/mL in BC-goat yoghurt. Conclusion. The bacteria proportion had a significant effect on fermentation of AB- and BC-goat yoghurt, the results are beneficial for developing AB-goat yoghurt and BC-goat yoghurt. ER -