Indigenous <i>Lactococcus lactis</i> with Probiotic Properties: Evaluation of Wet, Thermally- and Freeze-Dried Raisins as Supports for Cell Immobilization, Viability and Aromatic Profile in Fresh Curd Cheese

Indigenous <i>Lactococcus lactis</i> enriched raisins were incorporated in fresh curd cheese in wet, thermally dried, and freeze-dried form to produce a novel probiotic dairy product. Symbiotic cheese represents a rising trend in the global market. The viability of <i>L. lactis<...

Full description

Bibliographic Details
Main Authors: Justina Mileriene, Loreta Serniene, Kristina Kondrotiene, Valentini Santarmaki, Yiannis Kourkoutas, Agne Vasiliauskaite, Lina Lauciene, Mindaugas Malakauskas
Format: Article
Language:English
Published: MDPI AG 2022-04-01
Series:Foods
Subjects:
Online Access:https://www.mdpi.com/2304-8158/11/9/1311
Description
Summary:Indigenous <i>Lactococcus lactis</i> enriched raisins were incorporated in fresh curd cheese in wet, thermally dried, and freeze-dried form to produce a novel probiotic dairy product. Symbiotic cheese represents a rising trend in the global market. The viability of <i>L. lactis</i> cells was assessed in the cheeses during storage at 4 °C for 14 days and the effect of the added enriched raisins on physicochemical parameters, microbiological characteristics, and sugar content, aromatic profile, and sensory acceptance of cheeses were evaluated. Immobilized <i>L. lactis</i> cells maintained viability at necessary levels (>6 log cfu/g) during storage and significantly increased the acceptability of cheese. The addition of raisins enhanced the volatile profile of cheeses with 2-furanmethanol, 1-octanol, 3-methylbutanal, 2-methylbutanal, 2-furancarboxaldehyde, 1-(2-furanyl)-ethanone, 5-methyl-2-furancarboxaldehyde. The obtained results are encouraging for the production of novel fresh cheeses with improved sensorial and nutritional characteristics on industrial and/or small industrial scale.
ISSN:2304-8158