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Elaheh Ahmadi
Elaheh Ahmadi
Young Researchers and Elites Club, Science and Research Branch,
Tehran
West Indies
Publications
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Research Article
The Effect of Heat Inactivating Process on Biochemical, Microbiological and Sensory Characteristics of Iranian Drink Based on Fermented Milk (Doogh)
Author(s): Elaheh Ahmadi, Amir Mohammad Mortazavian and Reza MohammadiElaheh Ahmadi, Amir Mohammad Mortazavian and Reza Mohammadi
This study investigates the effects of heat inactivating processing of yogurt bacteria compared with other sequential inoculation on biochemical, microbiological, and sensory characteristics of typical Iranian drink based on fermented milk (Doogh). The yogurt bacteria (Streptococcus thermophilus and Lactobacillus delbrueckiis sp. bulgaricus) were used in all treatments. Bifidobacterium animlis spp. lactis PTCC 1631 was used as probiotic bacteria. A pH, titrable acidity, redox potential, fermentation time, and viability of probiotic organisms were analyzed during fermentation and over the refrigeration storage for21 days at 5°C. Also, the sensory attributes of treatments were determined at the end of fermentation. The greatest (p<0.05) mean pH drop rate was observed in BlY-40-4.5 treatment (B. animlis spp. lactis PTCC 1631 was co-cultured with yogurt starter bacteria and incubat.. View More»
DOI: 10.4172/2157-7110.1000271