The quenching method was used to determine phase relations at liquidus temperatures in the system cobalt oxide‐iron oxide‐silica in air. The crystalline phases coexisting in equilibrium with liquids in the system are silica (SO2), olivine (Co2SiO4), a spinel solid solution ((Co,Fe)3O4), and an oxide solid solution ((Co,Fe)O) with peri‐clase‐type structure. The lowest liquidus temperature is 1313°C. Composition relations among coexisting liquid and solid phases were established in the areas where solid solution crystals are involved in the equilibria.

Caractérisation physicochimique de trois espèces de champignons sauvages comestibles couramment rencontrées dans la région du Haut-Sassandra (Côte d'Ivoire).

The passion fruit or grenadilla is usually consumed in the form of juice and its pleasant intensive aroma and flavor make it an attractive element for the food industry. The objective of the present work is to determine the effects of membrane technologies such as tangential microfiltration and reverse osmosis on the physicochemical characteristics of passion fruit extracts. The characteristics of the various extracts were determined according to conventional methods. In addition, statistical methods were applied to the data collected in order to determine the effects of membrane technologies. The results showed a yield of 89.33% for the extraction of the microfiltered juice and a volume reduction factor of 16.75 for the concentrate. In addition, the microfiltration-concentration process significantly (p <0.05) influenced the physicochemical parameters of the extracts produced. Thus, tangential microfiltration made it possible to clarify the crude extract by changing from a turbidity of 89.23 ± 1.71 to 0.72 ± 0.02 NTU. It has also resulted in a significant decrease in pH and flavonoids contents. Principal component analysis confirmed the existence of differences between the extracts produced despite the various correlations between their characteristics. It revealed that the JB and CMFT extracts are characterized by their high pH and low density. On the other hand, the COI extract is characterized by its brix degree, viscosity, conductivity and high vitamin C content. In addition, reverse osmosis has the advantage of concentrating the compounds of interest of clarified juice with a concentration factor ranging from 2.15 to 9.39.

Objective : The present study aims to compare the fertilizing quality of green algae (Azolla caroliniana), compost and NPK applied to tomato in the Daloa area (Côte d'Ivoire). The parameters evaluated are the vegetative growth and yield of these tomatoes. Methodology and results : The trial is performed as a randomized, complete block of four treatments (Azolla caroliniana, compost, NPK and Control) in four replicates. Data are collected on the vegetative cycle of crops. The treatments were compared according to the vegetative parameters : stem height (ht), neck diameter (dc), leaf length (lf) and yield (r). Except NPK treatments received 200 kg / ha for NPK and 100 kg / ha for urea, treatments are fertilized at the same manure rate (30 t / ha). The results indicate Azolla caroliniana statically differ. The average of (ht) is 49.37 ± 0.55 cm with Azolla caroliniana against 37 ± 1 cm for NPK, 34.57 ± 2.2 for compost and 22.95 ± 0.24 for control, except the growth of (dc) where the smallest difference was not significant. (Dc) is 0.71 ± 0.08; against 0.57 ± 0.03 for NPK, 0.55 ± 0.08 for compost and 0.42 ± 0.07 for the control. Yield was high with Azolla caroliniana (26.13 ± 0.86 t / ha tomato) at a density of 37500 plants / ha. Conclusion and application of results:This study shows that Azolla caroliniana gives a high yield with a high density, restores good soil fertility and increases the productivity of the tomato crop.

The present study was carried out to characterise tomatoes produced on soilless substrates (cocoa, sawdust, cashew and rice husk) and to evaluate their impact on the technological and organoleptic characteristics of the tomato. A tomato crop was grown on these different substrates for three months. The tomato fruits from each substrate were subjected to chemical, technological and sensory analysis. The tomatoes of the different substrates have a high water content (94.83- 96.37%). Regarding the technological properties, the results recorded are for saccharin index (1.15%), saccharin coefficient (121.5%) and acidity coefficient (8.29%). The sensory study of the tomatoes reveals that the tasters perceived sensory differences between the tomatoes. Their overall perception of the tomatoes confirms their good acceptability. Also taste, colour, shape and consistency are important criteria of fresh tomatoes. At the end of this study, it was found that the C100 substrate presented the best physicomorphological parameters. Technologically, tomatoes from the RB5050 and B100 substrates can be recommended for industrial processing.