Patrignani Francesca, Burns Patricia, Serrazanetti Diana, Vinderola Gabriel, Reinheimer Jorge, Lanciotti Rosalba, Guerzoni M Elisabetta
Dipartimento di Scienze degli Alimenti, University of Bologna, p.zza Goidanich 60, 47023, Cesena, Italy.
J Dairy Res. 2009 Feb;76(1):74-82. doi: 10.1017/S0022029908003828. Epub 2009 Jan 5.
High pressure homogenization (HPH) is one of the most promising alternatives to traditional thermal treatment for food preservation and diversification. In order to evaluate its potential for the production of fermented milks carrying probiotic bacteria, four types of fermented milks were manufactured from HPH treated and heat treated (HT) milk with and without added probiotics. Microbiological, physicochemical and organoleptic analyses were carried out during the refrigerated period (35 d at 4 degrees C). HPH application to milk did not modify the viability of the probiotic cultures but did increase the cell loads of the starter cultures (ca. 1 log order) compared with traditional products. The coagula from HPH-milk was significantly more compacted (P<0.05) (higher firmness) than that obtained with HT-milk, and it had the highest values of consistency, cohesiveness and viscosity indexes compared with fermented milks produced without HPH treatment. All the samples received high sensory analysis scores for each descriptor considered. HPH treatment of milk can potentially diversify the market for probiotic fermented milks, especially in terms of texture parameters.
高压均质化(HPH)是传统热处理用于食品保鲜和多样化最具前景的替代方法之一。为了评估其在生产携带益生菌的发酵乳方面的潜力,用添加和未添加益生菌的经HPH处理和热处理(HT)的牛奶制备了四种类型的发酵乳。在冷藏期(4℃下35天)进行了微生物、理化和感官分析。与传统产品相比,对牛奶应用HPH不会改变益生菌培养物的活力,但会增加发酵剂培养物的细胞数量(约1个对数级)。HPH处理牛奶得到的凝乳比HT处理牛奶得到的凝乳显著更紧实(P<0.05)(硬度更高),与未进行HPH处理生产的发酵乳相比,其稠度、内聚性和粘度指数值最高。对于所考虑的每个描述符,所有样品的感官分析得分都很高。牛奶的HPH处理有可能使益生菌发酵乳市场多样化,特别是在质地参数方面。