Black plum, the fruit of Vitex doniana, was harvested in three (3) regions belonging to different climatic zones in northern Côte d'Ivoire. Biochemical characteristics of the pulps were studied in order to highlight their nutritional potential and the variability of this composition according to study areas. From the conventional biochemical analyzes used, it appears that the fruit pulp is acidic and mostly made up of water. It is rich in sugars and has antioxidant power between 18.63 ± 0.02 and 35.54 ± 0.01 µg.mL -1 . There is also the presence of polyphenols (166.67 ± 0.01 -196.67 ± 0.01 mEq A.G./100g) and vitamin C (14.34 ± 0.02 -15.05 ± 0.07 mg/100g). Ashes consist of minerals such as magnesium, potassium and calcium. The analysis of the variance showed that the mean of the parameters studied are significantly different from one region to the other, except the ash rate and vitamin C content. In view of its nutritional quality, black plum presents itself as an interesting fruit to be taken into account in the prevention of certain dietary imbalances and which can even intervene at low cost in the treatment European Scientific Journal January 2018 edition Vol.14, No.3 ISSN: 1857 -7881 (Print) e -ISSN 1857- RésuméLa prune noire, fruit du Vitex doniana a été récoltée dans trois (3) régions appartenant à des zones climatiques différentes du Nord de la Côte d'Ivoire. Les caractéristiques biochimiques des pulpes ont fait l'objet d'une étude qui visait la mise en exergue de leur potentiel nutritionnel et la variabilité de cette composition suivant les zones d'étude. Des analyses biochimiques classiques utilisées, il ressort que la pulpe des fruits est acide et majoritairement constituée d'eau. Elle est riche en sucres et a un pouvoir antioxydant compris entre 18,63 ± 0,02 et 35,54 ± 0,01 µg.mL -1 . On note également la présence de polyphénols (166,67 ± 0,01 -196,67 ± 0,01 mEq A.G./100g) et de la vitamine C (14,34 ± 0,02 -15,05 ± 0,07 mg/100g). Les cendres se composent de minéraux tels le magnésium, le potassium et le calcium. L'analyse de la variance a montré que les moyennes des paramètres étudiés sont significativement différentes d'une région à l'autre, hormis le taux de cendres et la teneur en vitamine C. Au regard de sa qualité nutritionnelle, la prune noire se présente comme un fruit intéressant à prendre en compte dans la prévention de certains déséquilibres alimentaires et pouvant même intervenir à moindre frais dans le traitement de certaines pathologies.

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Solar drying remains for developing African countries the only economical means of preserving foodstuffs for which post-harvest losses sometimes reach 60%. It was modeled in this work, the different elements that constitute a solar drying system by natural convection. This model is described by heat, mass and momentum balance equations between the different exchange media. The model initially made it possible to describe the dynamic behavior and calorific value of greenhouse-type solar dryers. The optimization study through simulations also made it possible to compare the drying power of more than 180 solar dryers. The analysis of the simulation results gave the dryer a small size (h = 2.5 m and l = 3 m) with large identical openings (inlet = loutlet = 25 cm) positioned at the two extremes: bottom for the inlet (Ye = 0.1 m) and high for the air outlet (Ys = 1.65 m), as an energy-efficient dryer (Taverage = 50.73 oC). The fluidity of the air (Vaverage = 0.58 m.s-1) in this dryer is also remarkable and could be used for drying food products.