by Kokou Agbossou, Komi Apélété Amou, Tchamye T. E. Boroze, Kossi Napo and Andre D.L. Batako
Original Research
This study focuses on a drying system consisting of a flat air solar collector coupled longitudinally to a drying chamber in the climatic conditions of tropical regions and the case of Togo was presented. The study was carried out using mathematical models obtained by writing the laws of energy conservation in the different components of the system. Simulations were achieved using experimental measurements of daily solar radiation and ambient temperature on a typical day in Lomé (Togo). The results highlight the importance of solar radiation and the use of fins on the performance of the drying system. It reveals that an optimal range of solar daily radiation for the proposed insulator for drying is 400 W/m2 to 1000W/m2, with an ambient air speed of 1.5 m/s to 4.5 m /s and a temperature variation of 20°C to 45°C.
American Journal of Food Science and Technology. 2023, 11(5), 183-188. DOI: 10.12691/ajfst-11-5-3
Pub. Date: November 21, 2023
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by Gbraguhé Désirée Victoire, Adjouman Yao Désiré, Adou Marc, Akely Pierre Martial Thierry and Tetchi Fabrice Achille
Original Research
Watermelon (Citrullus lanatus) has been described as an important source of nutritional compounds. Investigations carried out in Côte d'Ivoire show that there is very little scientific data on it. The aim of this study was to compare the physico-chemical and biochemical compositions of the pulp of two watermelon cultivars (Kaolack and Sugar Baby) from Jacqueville, Divo and Bassam, by production area and variety. The results showed that the Kaolack variety from Jacqueville was more acidic (0.17±0.00%) and had higher lipid contents (0.1±0.01 mg/g), while that from Divo had a higher dry matter content (5.37±0.06%). And finally, the Kaolack variety from Bassam appeared to be sweeter ESS (7.8±0.10%) and had a higher moisture content (98.47±0.06%) and pH (5.38±0.01). Sugar Baby from Jacqueville had high dry matter (5.73±0.4%) and fiber (0.46±0.01%), Sugar Baby from Divo was more concentrated in acid (0.17±0.00%), protein (0.58±0.02%) and moisture (97.57±0, 06%) and the Sugar Baby variety from Bassam was more concentrated in ESS sugar (7.89±0.06%) with a pH of (5.47±0.01) and high carbohydrate (11.65±0.07 mg/g), total sugar (0.70±0.00 mg/g) and reducing agent (0.52±0.00 mg/g) contents. The study highlighted the physico-chemical and biochemical composition of watermelon varieties grown in Côte d'Ivoire. However, these parameters differed from one production area to another and from one variety to another, which could be due to the impact of the production area and the variety.
American Journal of Food Science and Technology. 2023, 11(5), 175-182. DOI: 10.12691/ajfst-11-5-2
Pub. Date: November 17, 2023
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by Tchumou Messou, Wohi Maniga, Oupoh Bada Bedos and Tano Kablan
Original Research
To enable growers and provide consumers with Phaseolus lunatus (L.) seeds of good nutritional quality, this study was carried out on Phaseolus lunatus seeds obtained from pods of white, red and black cultivars harvested at stage 1 (32 days), stage 2 (38 days), stage 3 (45 days) and stage 4 (52 days) after fertilisation. Weight of pods and seeds at harvest decreases from stage 1 to stage 4 of maturity. Major biochemical compounds such as crude protein, carbohydrates and lipids of seeds are highest at stage 4 (52 days) of maturity. Seeds of the black cultivar are richer in protein, with a content varying between 17.51 ± 0.17 and 21.21 ± 0.18 % at stage 4 (52 days) of maturity. Seeds of black cultivar produced at stage 4 (52 days) are rich in vitamins B1, B2, B6 and B9 and antioxidants such as carotenoids and flavonoids. These seeds contain high levels of vitamins B6 (pyridoxine) and B9 (folic acid). The concentrations of these vitamins vary from 1900 to 2000.03 μg/100g of dry matter and from 599.93 ± 0.86 to 600 ± 1.00 μg/100g of dry matter respectively. P. lunatus seeds obtained at stage 4 (52 days) were rich in minerals. The Na/K ratio of white, red and black bean seeds varies from 0.04 to 0.05, i.e. less than 1. As a result, eating these Phaseolus lunatus bean seeds would probably reduce high blood pressure. In conclusion, Phaseolus lunatus seeds have good nutritional quality, the pods must be harvested at stage 4 (52 days) after fertilisation in order to satisfy consumers.
American Journal of Food Science and Technology. 2023, 11(5), 162-174. DOI: 10.12691/ajfst-11-5-1
Pub. Date: October 20, 2023
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