University Peleforo Gon Coulibaly of Korhogo, Department of Biochemistry and Food Sciences, Laboratory of food Microbiology and Biotechnology, Côte d'Ivoire
The aim of this study is to determine the physico-chemical parameters and to evaluate the microbiological quality of zoom-koom, an artisanal beverage sold in Korhogo. It looked at various critical points in the production chain of three processors and one production at the UPGC laboratory. The physico-chemical analyses carried out show that the samples of Zoom-koom have a ph between 3.5 and 6.7 with a titratable acidity ranging from 0.06% to 0.36%. In addition, microbiological analyses showed a mesophilic aerobic germ load ranging from log 5 CFU/ml to log 8.2 CFU/ml. As well, a total coliform load ranging from log 0.7 CFU/ml to log 2.1 CFU/ml was observed, while the yeast load ranged from log 1.2 CFU/ml to log 2.9 CFU/ml. In addition, a lactic acid bacterial load ranging from log 1.2 CFU/ml to log 3.2 CFU/ml was observed in Zoom-koom samples. This beverage is relatively rich in reducing sugars (109-177.3 mg/ml) and protein (8-12 g/ml). Based on the results, Zoom-koom contains nutrients (protein and carbohydrates) that can be used either to provide energy to the body or to help reduce malnutrition.
This study was carried out to determine organic acids in palm saps throughout tapping. Palm wine sample at different stages of processing namely tapping, were collected and analysed for physical, biochemical, nutritional and microbiological parameters (pH, total titratable acidity (TTA), fermenting microorganisms) extracted from two varieties of palm oil tree (Dura and Tenera). Microbiological and biochemical contents of palm wine were determined during the tapping of Dura and Tenera felled oil palm trees for 4 weeks. Some differences in chemical compositions between fresh palm wine samples of two palm trees varieties were observed. In addition the results of pH, total titratable acid and organic acids confirmed the importance of lactic acid bacteria in the tapping of palm wine. The organic acids of fresh palm wines collected during tapping are showed in Fig 3. Organic acids detected in the freshly collected palm wine (first day) included oxalic (0.1
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