乳球菌 Lactococcus lactis GV103,可能是益生菌,用于开发无乳糖发酵牛奶
Taynan Jonatha Neves Costa1, Isabella Maciel Costa2, Wendy Carla Dantas Rocha2
1Department of Food, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil.
概括
乳酸细菌 (LAB) 在没有乳糖的牛奶中发酵,使用Lactococcus lactis GV103和Streptococcus thermophilus STI-12是成功的. 该研究强调了这些益生菌菌株在开发无乳糖发酵乳制品方面的潜力.
科学领域:
- 食品微生物学 食品微生物学
- 乳制品科学 乳制品科学
- 益生菌 益生菌 益生菌
背景情况:
- 乳糖不耐症影响全球人口的很大一部分,推动了对无乳糖乳制品替代品的需求.
- 益生菌乳酸细菌 (LAB) 提供健康益处,但需要适当的发酵条件和乳制品的存活率.
研究的目的:
- 评估葡萄糖和乳糖对LAB活力和发酵特性的影响.
- 评估无乳糖发酵牛奶的微生物和技术特性,该发酵牛奶由乳球菌乳酸菌GV103.3生产.
- 在模拟的胃肠道条件下确定LAB的存活率.
主要方法:
- 在葡萄糖,乳糖和葡萄糖:乳糖介质中培养了LAB (Lactococcus lactis GV103和Streptococcus thermophilus STI-12).
- 监测了发酵参数 (pH,可定位酸度) 和技术性质 (协同作用,水容量).
- 在模拟的胃肠道条件下评估了LAB数量和生存率.
主要成果:
- 在葡萄糖:乳糖介质中共同培养导致比单独使用葡萄糖更快的pH值降低.
- 在葡萄糖:乳糖介质中,Lactococcus lactis GV103表现出高细胞数 (>10.50 log CFU/mL).
- 没有乳糖的发酵牛奶在储存28天后保持了高LAB活力 (>10.50 log CFU/mL),并经历了模拟的胃肠道疾病 (>9.00 log CFU/mL).
结论:
- 乳球菌乳酸菌GV103和Streptococcus thermophilus STI-12对于生产具有良好的微生物和技术特征的无乳糖发酵牛奶是有效的.
- 这些菌株显示出在无乳糖乳制品中益生菌应用的潜力.
- 建议对感官分析和工业规模生产进行进一步的研究.
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