相关实验视频
Updated: Jun 4, 2025

00:05
Preparation of High-Quality Fermented Fish Product
Published on: August 23, 2019
10.3K
随机和决定性过程在储存过程中塑造微生物群落和强烈风味的果汁的风味特征
Shiyuan Ma1, Yong Li2, Yi Dong2
1College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China.
International journal of food microbiology
|December 18, 2024
概括
储存条件显著影响微生物群落和味道化合物在中国Baijiu开头 (daqu). 区域差异和温度等环境因素影响这些变化,为优化生产提供了洞察力.
科学领域:
- 微生物学 微生物学
- 食品科学 食品科学 食品科学
- 发酵技术的发酵技术
背景情况:
- 基于小麦的开胃菜达库 (Daqu) 对于中国的 Baijiu 生产至关重要.
- 达克的质量受到储存条件的严重影响.
- 微生物群落的组合及其在存期间对味道的影响尚不清楚.
研究的目的:
- 在储存期间调查来自中国三个主要Baijiu地区 (卢州,成都,德阳) 的daqu中的微生物社区组合和挥发性化合物概况.
- 识别关键的微生物参与者 (生物标志物,关键物种) 以及它们与风味化合物的关系.
- 阐明微生物社区组合中随机和决定性过程的作用.
主要方法:
- 在来自三个地区的水样中分析微生物群落和挥发性化合物.
- 应用随机森林算法用于生物标记物识别.
- 同时发生的网络分析,以评估社区的稳定性和确定关键物种.
- 利用修改后的随机率 (MST) 和中立社区模型来理解组装机制.
主要成果:
- 确定了15种生物标志物和42种不同的挥发性风味化合物.
- 卢州 (LZ) 的网络表现出最高的稳定性,而成都 (CD) 显示出最低的复杂性和稳定性,确定了14种基石物种.
- 随机和确定性过程都塑造了微生物群落,随机性在Deyang (DY) 中占主导地位,而确定性过程在LZ和CD中占主导地位.
- 环境因素 (温度,露点,气压) 显著影响了关键的微生物种类,并与挥发性风味化合物相关联.
结论:
- 区域差异和储存条件明显影响微生物群落聚集和水中的挥发性风味特征.
- 由环境因素驱动的决定性过程在塑造重要的微生物种类和风味化合物方面发挥着至关重要的作用.
- 调查结果为调控存提供了有价值的见解,以提高中国的质量和生产.
相关概念视频
Microorganisms in Agriculture and Food industry
Microorganisms play a crucial role in agriculture and the food industry, contributing to soil fertility, crop protection, and food production. Their functions range from nitrogen fixation and biopesticide production to fermentation and food preservation, making them indispensable to sustainable farming and food safety.Role in AgricultureNitrogen-fixing bacteria, such as Rhizobium (symbiotic) and Azotobacter (free-living), convert atmospheric nitrogen into ammonia through biological nitrogen...
Factors Influencing Microbial Growth: pH
Microorganisms are classified as acidophiles, neutrophiles, or alkaliphiles based on their pH growth preferences, reflecting their adaptations to specific environments. Maintaining a stable intracellular pH is critical for macromolecular stability and enzymatic activity, which can be challenged by external pH variations.Neutrophiles, such as Escherichia coli, grow optimally between pH 5.5 and 8.0. These microorganisms inhabit neutral or slightly acidic environments and employ mechanisms like...
Microbial Fermentation
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
Sample Handling
87
Transportation of samples from the collection point to the laboratory, as well as storage and preservation techniques, are crucial for maintaining sample integrity and ensuring accurate and reliable test results.
Samples should be transported carefully from collection points to the laboratory. They should be properly sealed and clearly labeled to prevent cross-contamination. To preserve the sample integrity, optimal temperature conditions during transport are essential. This could involve using...
Samples should be transported carefully from collection points to the laboratory. They should be properly sealed and clearly labeled to prevent cross-contamination. To preserve the sample integrity, optimal temperature conditions during transport are essential. This could involve using...
87
Key Techniques in Microbiology
Aseptic techniques prevent contamination, ensure experimental accuracy, and protect researchers and microbial cultures. These techniques are essential in clinical, industrial, and research settings where sterility is required.Maintaining Sterility in Laboratory PracticesScientists maintain sterility by sterilizing tools with heat or chemicals, disinfecting work surfaces, and handling cultures in controlled environments. Working near an open flame or within a laminar flow hood reduces the risk...
Special Staining Techniques
Specialized staining techniques play a vital role in microbiology by enabling the visualization of specific bacterial structures that remain undetectable with standard microscopy methods. These techniques not only enhance the structural visualization of bacterial cells but also provide critical insights into their pathogenicity and classification. Additionally, they support diagnostic and research endeavors in microbiology by identifying key bacterial features.Capsule Staining for Virulence...

