将K5用作新型潜在益生菌冻干发酵剂用于菲达型奶酪生产

Employment of K5 as a Novel Potentially Probiotic Freeze-Dried Starter for Feta-Type Cheese Production.

作者信息

Terpou Antonia, Mantzourani Ioanna, Galanis Alex, Kanellaki Maria, Bezirtzoglou Eugenia, Bekatorou Argyro, Koutinas Athanasios A, Plessas Stavros

机构信息

Food Biotechnology Group, Section of Analytical Environmental and Applied Chemistry, Department of Chemistry, University of Patras, GR-26500, Patras, Greece.

Laboratory of Microbiology, Biotechnology & Hygiene, Faculty of Agricultural Development, Democritus University of Thrace, 68200 Orestiada, Greece.

出版信息

Microorganisms. 2018 Dec 26;7(1):3. doi: 10.3390/microorganisms7010003.

Abstract

In the present study, a novel potentially probiotic strain, previously isolated from dairy products, was evaluated as a starter culture of Feta-type cheese production. Targeting industrial applications, the starter culture was applied as a ready-to-use freeze-dried culture that was either free or immobilized. The immobilized biocatalyst composed of K5 cells absorbed within delignified wheat bran prebiotic carrier. All produced cheeses were compared with cheese manufactured by renin enzyme. Several parameters that affect acceptability, quality and shelf-life of Feta-type cheese were investigated, including microbial populations, physicochemical characteristics and cheese volatiles through 90 days of ripening and storage. Survival of K5 remained in high levels (≥6.0 log cfu/g) after the 90th day of cheese production, as recorded by combining microbiological enumeration and strain-specific multiplex PCR analysis. The use of the freeze-dried novel starter culture (free or immobilized) enhanced the aromatic profile of Feta-type cheeses. Finally, the use of the potentially synbiotic immobilized biocatalyst further improved aromatic characteristics of produced cheese and decrease of possible spoilage or pathogenic microorganisms. These findings indicate the potential industrial use of freeze-dried K5 as starter culture for the production of good-quality functional Feta-type cheese.

摘要

在本研究中,一种先前从乳制品中分离出的新型潜在益生菌菌株被评估为费塔型奶酪生产的发酵剂。针对工业应用,该发酵剂以即用型冷冻干燥培养物的形式应用,其可以是游离的或固定化的。固定化生物催化剂由吸附在脱木质素麦麸益生元载体中的K5细胞组成。将所有生产的奶酪与用凝乳酶制造的奶酪进行比较。研究了影响费塔型奶酪可接受性、质量和保质期的几个参数,包括在90天的成熟和储存过程中的微生物种群、理化特性和奶酪挥发物。通过微生物计数和菌株特异性多重PCR分析记录,在奶酪生产第90天后,K5的存活率仍保持在较高水平(≥6.0 log cfu/g)。使用冷冻干燥的新型发酵剂(游离或固定化)增强了费塔型奶酪的香气特征。最后,使用潜在的合生元固定化生物催化剂进一步改善了所生产奶酪的香气特性,并减少了可能的腐败或致病微生物。这些发现表明冷冻干燥的K5作为生产优质功能性费塔型奶酪的发酵剂具有潜在的工业用途。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d2e7/6352075/8224bd985804/microorganisms-07-00003-g001.jpg

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