In this research, we aimed to evaluate the effects of various medicinal and aromatic plant aqueous extracts on physicochemical, rheological, sensorial properties of probiotic yogurts and the viability of yogurt bacteria and probiotic bacteria during the storage period. On the 28 day of storage, the maximum Bifidobacterium longum and Lacticaseibacillus casei counts were determined in thyme containing yogurt and mint and basil containing yogurt, respectively. On the 1 st day of storage, the most favoured yogurt was garlic containing sample while on the 14 th day, the control sample was the most favoured one. Hardness values were not showed statistically difference for all sample (p>0.05). Especially the garlic and mint yogurt samples were more liked in terms of sensory properties. Consequently, aqueous extracts of some plants such as garlic, basil and thyme have successfully used in probiotic yogurt production and all yogurt samples containing plants have the enough probiotic counts to show therapeutic effect on human health.
In the present work, the antioxidant, antimicrobial activities, total phenolic content, and microbiological quality of Mozzarella cheeses added with medicinal and aromatic plants namely rosemary (Rosmarinus officinalis L.), basil (Ocimum basilicum L.), peppermint (Mentha piperita L.), and Turkish oregano (Origanum onites L.) were investigated. Results demonstrated that peppermint and Turkish oregano increased antioxidant and antimicrobial activities, while Turkish oregano and basil increased the total phenolic content of the Mozzarella cheese samples. Mozzarella cheese samples added with Turkish oregano exhibited antimicrobial activity against Escherichia coli, Listeria monocytogenes, and Enterococcus faecalis during 30 days of storage. Mozzarella cheese sample added with rosemary and peppermint exhibited antimicrobial activity against Staphylococcus aureus in early storage, and Mozzarella cheese sample added with rosemary and Turkish oregano exhibited antimicrobial activity against Bacillus cereus on the 10th day of storage. It was determined that the highest activity against the tested microorganisms was observed in Mozzarella cheese sample added with Turkish oregano and peppermint. It was also determined that Lactobacillus spp. and Streptococcus thermophilus counts were above log 4 CFU/g for 30 days. The addition of medicinal and aromatic plants to the Mozzarella cheese samples did not affect yeast and mould development, and the yeast and mould counts increased during the storage period.
Mozzarella cheese is produced by kneading the curd, which has a fibrous structure with melting and elongation properties, in hot water. The present study aimed to investigate the impact of the addition of some plants on certain properties of Mozzarella cheese. Rosemary (Rosmarinus officinalis L.), basil (Ocimum basilicum L.), mint (Mentha piperita L.) and Turkish Oregano (Origanum onites L.) were added to Mozzarella cheese
at the curd kneading stage, and physicochemical, textural, microstructural, meltability and sensory properties were investigated during the storage period. No plants were added to the control group cheese. Plant addition to Mozzarella cheese affected some physicochemical properties such as pH, acidity, free fatty acids, as well as textural and microstructural properties. Furthermore, it affected sensory properties, especially Turkish Oregano and mint addition provided high general acceptability and taste-aroma scores. While higher pH and lower titration acidity were determined in rosemary-added cheese samples, the lowest free fatty acid (ADV) levels were determined in the mint-added cheese sample. Rosemary-added cheeses had higher hardness and a more even microstructure, while the highest sensory scores were obstained for cheeses that included Turkish Oregano and mint. In conclusion, the present study findings demonstrated that the short shelf life of Mozzarella cheese could be extended with the addition of various plants due to their effects on pH, acidity and free fatty acids.
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