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早期葡萄酒发酵阶段的化学和微生物学评估可以预测在发酵后的过程中酵母细胞的活力
Jacopo Sica1, Giulia Crosato1, Zeno Molinelli1
1Department of Agronomy Food Natural resources Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro, PD, Italy.
International journal of food microbiology
|December 12, 2024
概括
酵母活力在发酵后仍然很高,这与之前的看法相反. 这项研究使用早期发酵数据开发了一种葡萄酵母细胞活力的预测模型.
科学领域:
- 葡萄酒学 葡萄酒学
- 微生物学 微生物学
- 食品科学 食品科学 食品科学
背景情况:
- 葡萄酒的氧化管理在发酵后至关重要.
- 酵母的成分提供了一些保护,但活性细胞的作用还没有得到充分研究.
- 现有的生存能力评估往往低估了实际可行的酵母菌种群.
研究的目的:
- 调查Saccharomyces cerevisiae酵母在发酵后阶段的生存能力.
- 为了将发酵参数与酵母活性的相关性.
- 开发一个预测模型,用于发酵后的酵母活力.
主要方法:
- 在天然葡萄汁中发酵后45天内监测12种Saccharomyces cerevisiae菌株.
- 在早期和最终阶段测量关键的发酵参数 (糖,,乙醇,糖醇).
- 评估总和可活细胞计数,使用超出盘子计数的方法.
主要成果:
- 在发酵后阶段表现出出乎意料的高酵母活力,因菌株而异.
- 建立了早期发酵参数和后来的细胞活力之间的相关性.
- 成功开发了一个预测模型,用于发酵后的生存能力.
结论:
- 酵母菌株显著影响发酵后的生存能力.
- 使用早期发酵数据的预测模型可以估计发酵后的生存能力.
- 该模型为葡萄酒厂提供了一种实际的工具,用于管理葡萄酒的氧化.
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