在相当于学校食堂共享桌的条件下,滥用牛奶的时间和温度并没有显著降低微生物质量
Gabriella Pinto1, Gustavo A Reyes1, Paola Corea1
1Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801.
Journal of dairy science
|November 10, 2023
概括
分享表可以安全地提供牛奶,因为即使在温度波动的情况下,微生物破坏是最小的. 专注于适当的制冷,以防止细菌生长,减少学校的牛奶浪费.
科学领域:
- 食品科学 食品科学 食品科学
- 微生物学 微生物学
- 公共卫生 公共卫生
背景情况:
- 在学校自助餐厅的共享桌子允许学生捐赠未打开的食物.
- 牛奶是学校午餐计划中浪费的重要产品之一.
- 了解共享表上的牛奶的微生物破坏对于食品安全至关重要.
研究的目的:
- 在学校分享表上评估牛奶的微生物破坏潜力.
- 为了确定环境温度 (冬季/夏季) 对牛奶腐烂的影响.
- 评估初始污染在牛奶腐烂中的作用.
主要方法:
- 牛奶盒 (注射和未注射) 被暴露在环境温度下,模拟学校的分享表.
- 在冬季和夏季条件下,在5天内监测微生物计数.
- 一个以前开发的模型被调整为模拟牛奶在份额表上的停留时间.
主要成果:
- 无菌牛奶在3-4天后超过了腐烂值.
- 没有接种疫苗的牛奶没有达到腐烂水平,这表明初始污染是关键.
- 最大的微生物生长发生在夜间冷藏期间,而不是在共享表上.
- 模拟的牛奶停留时间很短 (85分钟),预计损坏最小.
结论:
- 在分享表上的牛奶不太可能因短暂的停留时间而变坏.
- 控制冷藏温度对于牛奶安全至关重要.
- 分享表可以成为减少学校牛奶浪费的可行选择.
相关概念视频
Physical Methods for Controlling Microbial Growth: Temperature
28
Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
28
Factors Influencing Microbial Growth: Temperature
22
Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
22
Key Techniques in Microbiology
42
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...
42
Factors Affecting Body Temperature
4.3K
As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
Factors may include:
Factors may include:
4.3K
Microorganisms in Agriculture and Food industry
43
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...
43
Methods for Controlling Microbial Growth
42
Microbial growth control refers to various methods employed to inhibit, reduce, or eliminate microorganisms to ensure safety and hygiene across different settings. These methods are categorized based on the target environment and the level of microbial control required.Biocides are versatile agents designed to control microorganisms by either inhibiting their growth or outright killing them. These agents work through various physical, chemical, mechanical, or biological mechanisms. The...
42


