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Position: Home > Articles > On Biological Characteristics of Bacillus in Raw Milk Journal of Anhui Agricultural Sciences 2014 (14) 4426-4427

牛乳中芽孢杆菌生物学特性研究

作  者:
李笑坤;殷文政
单  位:
内蒙古农业大学食品科学与工程学院;伊金霍洛视频药品监督管理局
关键词:
原料乳;芽孢杆菌;形态特性;生理生化
摘  要:
[目的]研究乳制品中芽孢杆菌的生物学特性,为控制当地乳制品生产中芽孢杆菌所引起的质量问题提供理论依据。[方法]以内蒙古牧场的乳制品为原料,分离纯化了40株芽孢杆菌,对其进行了菌落和菌体的形态学鉴定并研究其生物学特性。[结果]试验发现,芽孢杆菌菌株革兰氏染色反应为阳性,大部分有荚膜菌体呈杆状,两端钝圆,长1.5~6.5μm,宽0.5~3.5μm,芽孢椭圆形,中生、近中生或偏端,孢囊大多数明显膨大,少数不明显膨大或不膨大。最高生长温度为60℃,最低为10℃,大部分为需氧菌,少数为厌氧菌,NaCl浓度大于10%将抑制其生长,pH在5.7时部分不发生反应,部分糖分有益于芽孢的生长。[结论]研究证明了营养物质、氧气、pH的控制将有效抑制芽孢杆菌的生长,从而提高乳制品的质量。
译  名:
On Biological Characteristics of Bacillus in Raw Milk
作  者:
LI Xiao-kun;School of Food Science and Engineering,Inner Mongolia Agricultural University;
关键词:
Raw milk;;Bacillus;;Morphological characteristics;;Physiological and biochemical characteristics
摘  要:
[Objective] To study biological characteristics of Bacillus in raw milk,and provide theoretical reference for controlling quality problems caused by Bacillus. [Method]With dairy products from Inner Mongolia as raw material,40 strains of Bacillus were isolated and purified,the morphology of colony and mycelia was identified,the biological characteristics were studied. [Result]The experiment showed that Gram staining reaction of Bacillus is positive,the length is 1. 5- 6. 5 μm,width 0. 5- 3. 5 μm. The highest growth temperature is 60 ℃,the lowest temperature is 10 ℃,the majority is aerobic bacteria and the minority is anaerobic bacteria. > 10% NaCl could inhibit the growth,no reaction when pH is 5. 7. [Conclusion] It was proved that the control of nutrients,oxygen and pH can effectively inhibit the growth of Bacillus,so as to improve quality of dairy products.

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