乳制品加工工厂在两个季节的不同加工阶段收集的牛奶样本的泡性质
Thao M Ho1,2,3, Bhesh R Bhandari2,3, Nidhi Bansal2,3
1Department of Food and Nutrition, University of Helsinki, Helsinki, Finland.
Journal of the science of food and agriculture
|October 7, 2023
概括
由于成分的变化,牛奶泡质量因季节而异,春季牛奶显示出更好的蒸汽注射泡性. 像同质化这样的加工步骤显著改善了牛奶发泡的特性.
科学领域:
- 食品科学 食品科学 食品科学
- 乳制品技术 乳制品技术
- 饮料科学 饮料科学
背景情况:
- 牛奶泡对于卡布奇诺酒的质量至关重要,但泡不良,尤其是在夏季,是常见的问题.
- 之前关于奶泡的研究是基于实验室的,不反映真实的乳制品工厂条件.
- 这项研究调查了来自乳制品工厂跨季节的牛奶成分和泡性质.
研究的目的:
- 确定牛奶泡性质季节性变化的原因.
- 调查牛奶成分和物理性质对泡性和泡稳定性的影响.
- 评估乳制品加工步骤对牛奶泡的影响.
主要方法:
- 在两个季节内从一个乳制品工厂收集了大约40个牛奶样本.
- 分析的牛奶成分 (脂肪,蛋白质,Ca2+离子等) 和物理特性 (粒子大小,表面张力).
- 使用机械混合和蒸汽注入方法评估发泡特性.
主要成果:
- 夏季牛奶含有更多的脂肪,自由脂肪酸,Ca2+离子和更大的颗粒大小,但蛋白质,固体和表面张力比春季牛奶低.
- 与夏季牛奶相比,春季牛奶表现出优越的蒸汽注入泡性.
- 季节性因素没有影响蒸汽注射泡的稳定性或机械混合泡性/稳定性. 一个赛季内的批量变化是最小的.
结论:
- 牛奶成分和物理性质的季节性差异解释了泡度的变化,而不是泡稳定性.
- 乳制品加工步骤包括标准化,同质化和巴氏杀菌,显著提高了牛奶发泡的特性.
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