在斯里兰卡的不同农业气候地区生产的不同品种茶的微生物质量
S H S Karunaratne1, G A S I Abeygunawardena2, D L Jayaratne2
1Industrial Technology Institute, 363, Bauddhaloka Mawatha, Colombo 07, Sri Lanka.
Heliyon
|March 28, 2024
概括
斯里兰卡茶的微生物分析显示质量可接受,大多数样品符合标准. 虽然细菌和酵母/菌的数量因地区而异,但不存在大肠杆菌和沙门氏菌等有害细菌.
科学领域:
- 食品微生物学 食品微生物学
- 农业科学 农业科学
- 质量控制 质量控制
背景情况:
- 斯里兰卡在各种农业气候地区和海拔地区生产各种茶叶等级.
- 微生物质量对于食品安全和消费者对茶叶产品的信任至关重要.
- 了解不同茶类和地点的微生物特征是必不可少的.
研究的目的:
- 评估不同茶品种和来自斯里兰卡工厂的复合样本的微生物质量.
- 为了确定茶叶中存在的微生物的类型和水平.
- 评估是否符合微生物质量指南.
主要方法:
- 从不同地理高度的工厂收集茶样.
- 量化有氧板数 (APC),酵母和菌数,以及大肠杆菌.
- 测试特定病原体的存在,如大肠杆菌 (大肠杆菌) 和沙门氏菌.
主要成果:
- 微生物数量 (APC,酵母和菌,大肠杆菌) 在不同茶品种和地点有所不同.
- 在任何茶样中都没有检测到大肠杆菌和沙门氏菌.
- 中国家茶具有最高的APC,而低国家茶显示出较高的酵母和菌数量.
- 超过70%的样本符合斯里兰卡茶叶局 (SLTB) 的微生物指南.
- 微生物分布因地理来源而有显著差异.
结论:
- 斯里兰卡茶一般表现出可接受的微生物质量,没有检测到病原体.
- 地理因素显著影响茶中的微生物负载.
- 大多数茶叶产品符合已确定的微生物安全标准.
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...
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 Beverage Production
Alcoholic beverages such as wine, beer, and spirits are the products of microbial fermentation processes that transform simple sugars into ethanol and a wide array of complex flavor compounds. These transformations rely on the metabolic activities of specific yeasts and bacteria, which are selected and controlled to yield the desired beverage characteristics.Wine Fermentation and MaturationWine production begins with the crushing of grapes to release juice and pulp, forming a must that is...
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...


