Dates as a potential substrate for single cell protein production |
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Authors: | Basil S Kamel |
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Institution: | University of Maryland, Food Science Program, College Park, Maryland 20742, USA |
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Abstract: | The use of date juice as a substrate for single cell protein production was investigated. Four strains of Saccharomyces cerevisiae and two strains of Candida utilis were examined as possible production cultures. The criteria used for screening the organisms were total cell count, total protein and decrease in soluble solids. S. cerevisiae ATCC 4111 gave the highest protein and cell production. The optimum substrate concentration was 4 - 5% soluble solids. At this concentration, 55% of the sugars was utilized. Cell mass after 12 h fermentation was 4.86 g l−1. The harvested and freeze-dried cells contained 8.6% nitrogen. The best combination of nutrient supplementation was found to be 0.25% (NH4)2HPO4 and 0.1% FeNH4(SO4)2; addition of MgSO4 and (NH4)2SO4 did not increase cell production. |
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