益生菌细菌高纤维植物零食的生存和保质期 - 模型研究研究
Marcin Kruk1, Piotr Lalowski2, Monika Hoffmann3
1Institute of Human Nutrition Sciences, Warsaw University of Life Sciences (WULS-SGGW), Nowoursynowska 159c, 02-776, Warsaw, Poland. marcin_kruk@sggw.edu.pl.
概括
开发含有益生菌的植物性零食,以便长期储存. 在低水活性填充剂中封装益生菌可确保生存和潜在的共生效应,保持感官质量.
科学领域:
- 食品科学与技术 食品科学与技术
- 微生物学 微生物学
- 营养科学 营养科学
背景情况:
- 使用益生菌开发功能性食品在加工和储存过程中保持细菌活力的挑战.
- 植物性零食提供了一个多功能矩阵,用于结合有益的微生物.
- 研究共生潜力需要评估益生菌和食物矩阵组件之间的相互作用.
研究的目的:
- 开发以益生菌细菌为增强保质期的植物性模型零食.
- 评估益生菌形式,注射方法和储存条件对细菌生存的影响.
- 评估开发的零食的协生潜力,营养特征和感官属性.
主要方法:
- 使用活性生物质,微囊和冷干燥形式对益生菌生存的比较分析.
- 接种策略:直接添加到基质,而不是加入到低水活性填充物中.
- 优化储存条件 (4°C和20°C) 和评估水活动 (aw) 影响.
- 评估抗氧化能力,多醇含量,纤维含量和感官分析.
- 在六个月的储存期内监测营养特性和质感的变化.
主要成果:
- 微封装的益生菌在4°C显示出更高的生存率,而冷干燥的益生菌在20°C表现更好.
- 与没有填充 (aw=0.53) 的零食相比,在低aw (0.27) 的花生填充中封装时,益生菌的存活率显著提高.
- 在5个月的环境温度下,在低aw填充中保持益生菌计数>6logCFU/g.
- 零食显示高纤维 (10.2 g/100g),抗氧化能力 (300 mg AAE/100g) 和多含量 (357 mg GAE/100g).
- 感官分析得出高整体质量 (7.1/10),经过六个月的储存后没有显著变化.
- 观察到潜在的协生效应,表明模型零食与对照中的细菌生长率较高.
结论:
- 植物性零食具有低aw填充有效地保护益生菌,确保延长环境储存的可行性.
- 开发的零食是一个有前途的功能性食品,提供高营养价值和可接受的感官品质.
- 这项研究解决了关于零食矩阵中益生菌生存的关键知识差距,为新型功能性食品开发铺平了道路.
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