Improving The Properties of The Egyptian Hard Cheese (Ras Type) with Adding Some Probiotic Lactobacillus spp. as Adjunct Cultures (original) (raw)

The objective of the present study was to improve the quality of the Egyptian hard cheese (Ras type) by adding some Lactobacillus spp. as probiotic adjunct cultures. Strains of Lb. acidophilus , Lb. helveticus and Lb. casei were used and the chemical, microbiological and sensory characteristics of the cheese during 90 days of ripening were evaluated. The obtained data indicated that pH values and moisture content were decreased, while the total nitrogen (TN), fat, fat/dry matter, titratable acidity and salt contents were increased significantly during the ripening period in all treatments. For the ripening indices, significantly higher content of soluble nitrogen (SN), SN/TN, soluble tyrosine, soluble tryptophan and total volatile fatty acids were found in the experimental cheese compared to the Control cheese. Higher Lactobacilli count were observed in the adjunct treated cheeses, which reflects the positive retention of Lactobacilli in the experimental cheeses. Also, the use of pr...

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