紫外线C (UV-C) 辐射对猪肉中食物传播病原体无活化的影响及其物理化学性质的变化
Jiseon Lee1, Sumi Lee1,2, Ui Sub Jung2
1Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul 05029, Korea.
Food science of animal resources
|March 17, 2025
概括
紫外线C光可以有效地使准备食用的猪肉中的乙型肝炎病毒 (HEV),大肠杆菌 (Escherichia coli) 和单细胞菌 (Listeria monocytogenes) 不活化. 这种非热方法可以提高食品安全,而不影响产品质量.
科学领域:
- 食品科学 食品科学 食品科学
- 微生物学 微生物学
- 食品保存 食品的保存方法
背景情况:
- 准备好吃的肉类,如猪肉,可以藏食物传播的病原体,如肝炎E病毒 (HEV),大肠杆菌O157:H7和Listeria monocytogenes.
- 确保这些产品的微生物安全性对于公众健康至关重要.
研究的目的:
- 评估紫外线C (UV-C) 光处理对减少准备食用猪肉中的病原体负载的有效性.
- 评估紫外线对猪肉质量属性的影响.
主要方法:
- 准备食用的猪肉样本被注射了HEV,大肠杆菌O157:H7或L.单细胞菌.
- 样品经过265和275nm波长的UV-C光处理,强度为10和50mW.
- 评估了微生物数量和质量参数 (颜色,纹理,pH值,含水量,水容量,氧化度,新鲜度).
主要成果:
- 紫外线 (UV-C) 光处理导致了猪肉颜色的变化,脂质氧化和蛋白质氧化,由于自由基的产生.
- 观察到大肠杆菌O157:H7 (高达2.23日志CFU/g) 和L. monocytogenes (高达1.85日志CFU/g) 的显著减少.
- 肝炎E病毒显著减少 (p<0.05),在50mW强度的治疗10分钟后没有检测到.
结论:
- 在波长超过265nm,50mW强度的UV-C光处理,为10分钟,是一种有效的非热方法,用于肉中的病原体无活化.
- 这种处理策略可以提高食品安全,同时保持产品质量.
- 紫外线 (UV-C) 光显示出作为一种先进的非热性食品保存技术的前景.
相关概念视频
01:29Methods of Sterilization I: Physical Methods
19.5K
As used in a healthcare facility, sterilization destroys all microorganisms through physical or chemical methods. The physical method includes steam, dry heat, boiling water, and radiation.
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
19.5K
01:35Mutations
32.8K
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
32.8K