结合热辐射微压和皮提取物添加,以实现酸奶发酵中的质量和酸化后控制
Xiaohui Zhang1, Yuanrong Zheng2, Changyu Zhou1
1College of Food Science and Engineering, Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China.
Ultrasonics sonochemistry
|March 29, 2024
概括
这项研究表明,将热化预先条件的乳酸细菌 (LAB) 与酸奶中的皮提取物相结合,有效地减少了酸化后,并增强了抗氧化特性. 这种方法可以在储存期间保持酸奶的质量和益生菌功能.
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
- 生物化学 生物化学
背景情况:
- 由于储存期间的酸性后变化,酸奶的质量往往会下降.
- 乳酸细菌 (LAB) 对于酸奶发酵至关重要,但可能导致过度酸性化.
- 使用天然提取物可以提供功能益处和保存.
研究的目的:
- 研究热预先调节的LAB和超声波辅助的皮提取物对酸奶质量的联合作用.
- 评估对后酸化,物理化学性质和抗氧化活性的影响.
- 评估益生菌性质和感官特征的保存情况.
主要方法:
- 酸奶使用热预先调节的LAB和超声波辅助的皮提取物 (UU组) 制备,并与对照组进行比较.
- 分析了物理化学性质 (酸度,乳糖,粘度,硬度,颜色),有机酸特征,抗氧化活性 (DPPH,ABTS) 和微生物粘附.
- 使用有针对性的代谢学来了解代谢变化.
主要成果:
- 在冷藏14天后,UU组的酸度显著降低 (0.5-2°T),乳糖含量更高.
- 总含量和抗氧化活性 (DPPH,ABTS) 在UU组显著更高.
- 没有观察到粘度,硬度或颜色的显著变化; 益生菌粘附性保持.
结论:
- 这种组合策略有效地抑制了酸化后的过程,并延迟了酸奶中的乳糖代谢.
- 这种方法可以增强抗氧化能力,而不会损害物理化学或感官属性.
- 使用具有预先条件的LAB的水果副产品提供了一种有前途的方法来改善酸奶的保存和功能.
相关概念视频
Microbes in Food Production
Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
Microbes in the Production of Fermented Foods
Lactic acid bacteria (LAB) and molds are instrumental in fermenting plant-based foods to enhance preservation and ensure year-round availability. These microbial processes convert plant carbohydrates into organic acids and other metabolites that inhibit spoilage organisms and contribute to the sensory qualities of the final product.In sauerkraut production, cabbage goes through a microbial succession that starts with cocci such as Leuconostoc mesenteroides. These microbes begin fermentation by...
Pasteurization and Food Preservation
Pasteurization is a widely employed thermal processing technique designed to enhance the safety and shelf life of perishable food and beverages. By subjecting products to specific high temperatures for controlled durations, this method effectively inactivates pathogenic microorganisms and spoilage enzymes without significantly compromising sensory qualities. The technique has been pivotal in food safety management, especially for consumables susceptible to microbial contamination such as milk,...
Methods of Controlling Food Spoilage
Food spoilage is caused by microbial growth or by chemical and physical changes, all of which affect the taste, texture, and safety of food.Temperature-Based PreservationRefrigeration at 0–4 °C slows microbial growth and enzyme activity, making it ideal for short-term storage. However, certain spoilage organisms—such as psychrotrophs like Listeria monocytogenes—can still proliferate at these temperatures. Freezing below -18 °C further slows biological processes by forming ice crystals, which...
Bioreactor Controls-III
Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
Production of Organic Acids
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...


