Chemical Engineering Department, School of Industrial Engineering - Centro de Investigación Tecnológico Industrial (MTI), University of Vigo, Campus As Lagoas-Marcosende, Vigo, Spain.
J Sci Food Agric. 2019 Jan 30;99(2):824-830. doi: 10.1002/jsfa.9251. Epub 2018 Aug 29.
Recent studies have proven that biosurfactants (BS) obtained from controlled fermentation have shown surfactant and antimicrobial properties. In this work a biosurfactant extract obtained from a raw agroindustrial stream from the corn-milling industry was introduced into a drinkable probiotic yogurt containing Lactobacillus casei.
The effect of the biosurfactant extract on the probiotic population was determined under different biosurfactant concentration, temperature, and time conditions. This extract was able to reduce the surface tension of water by 30 mN/m and it was observed that its addition to a drinkable probiotic yogurt did not negatively affect the biomass of L. casei during incubation. It also had a positive effect on the population of L. casei, increasing the growth of the probiotic bacterium in the yogurt under optimum temperature conditions for the growth of L. casei, in the range of 30-40 °C. Likewise, the biosurfactant extract did not modify the homofermentative pathway of L. casei; hence no acetic acid was detected in the presence of the biosurfactant extract in the drinkable yogurt.
This is the first time that a biosurfactant extract, obtained from natural sources, has been introduced into a food product like a drinkable probiotic yogurt, producing a positive effect in the growth of probiotic bacterium. © 2018 Society of Chemical Industry.
最近的研究证明，通过控制发酵获得的生物表面活性剂（BS）表现出表面活性剂和抗菌特性。在这项工作中，从玉米加工工业的原始农业工业流中获得的生物表面活性剂提取物被引入含有干酪乳杆菌的可饮用益生菌酸奶中。
在不同的生物表面活性剂浓度、温度和时间条件下，确定了生物表面活性剂提取物对益生菌种群的影响。该提取物能够将水的表面张力降低 30 mN/m，并且观察到将其添加到可饮用的益生菌酸奶中不会在培养过程中对干酪乳杆菌的生物量产生负面影响。它还对干酪乳杆菌的种群产生了积极的影响，在干酪乳杆菌生长的最佳温度条件下，即在 30-40°C 的范围内，增加了酸奶中益生菌的生长。同样，生物表面活性剂提取物没有改变干酪乳杆菌的同型发酵途径；因此，在可饮用酸奶中存在生物表面活性剂提取物的情况下，没有检测到乙酸。
这是首次将从天然来源获得的生物表面活性剂提取物引入到像可饮用益生菌酸奶这样的食品产品中，对益生菌细菌的生长产生了积极的影响。 © 2018 化学工业协会。
