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Evaluation of milk drinks fermented by probiotic bacteria and fortified with zinc salt

100%

Seleet F. L., El-Kholy W. I., Abd-Rabou N. S.

Polish Journal of Food and Nutrition Sciences

2011

tom 61

nr 1

Fermented milk drinks were made with buffalo’s milk produced by three probiotic bacteria Lactobacillus acidophilus L-a-5, Bifidobacterium bifidum and Lactococcus lactis ss lactis biovar diacetilactis MD 099(1:1:1). Four treatments fortified with 10 and 20 mg zinc element/L (as zinc sulphate or zinc acetate), respectively, were studied in comparison with a control sample for 10 days of storage at 5ºC. The sensory properties and cell viability of the fermented products were evaluated. The gross chemical composition, pH, flavor components (acetaldehyde and diacetyl) and viscosity were determined. The results showed that zinc salts activated the development of bacterial counts. Counts were increasing gradually during the first day of incubation till the end of the 5th day, then were gradually decreasing. The control and treatment samples contained the recommended levels of survival cells (106–107 CFU/g) of probiotic bacteria at the end of the 10th day. Statistical analysis of odour intensity, acidity, sweetness, bitterness, saltiness, creaminess, feeling after swallowing for fatty, astringency and metallic taste were sensory evaluated. A correlation was observed between sensory properties characteristics of fortified fermented milk drinks as affected by the addition of different levels of zinc salts.

Ograniczanie wyników

1 Polish Journal of Food and Nutrition Sciences

1 Abd-Rabou N. S.

1 El-Kholy W. I.

1 Seleet F. L.

1 2011

Wyniki wyszukiwania

Evaluation of milk drinks fermented by probiotic bacteria and fortified with zinc salt