Phytochemical Study and Comparative Antioxidant Activity of Extracts from Aerial Parts of <i>Chenopodium ambrosioides</i>Linn. (Chenopodiaceae)

The use of Chenopodium ambrosioides in some communities in Togo reveals its importance and its medicinal properties. The plant is often infused for medicinal drinks before use. Thus, through a comparative study, this work focused on the identification of the different phytochemical groups and then on the anti-radical capacities of ethanolic and aqueous extracts of aerial parts (lea- ves and seeds) of Chenopodium ambrosiooides obtained by maceration and infusion. The phytochemical tests, carried out on the various extracts, showed that they contained certain biomolecules such as flavonoids and tannins. Likewise, the presence of terpenoids and terpenes has been detected. However, it is only in aqueous extracts that the alkaloids have been revealed. The determination of the polyphenol content of the extracts revealed that the aqueous infusion contains 25.699 mgGAE/g DE, followed by the aqueous maceration: 24.873 mgGAE/g DE, after the ethanolic infusion: 21.009 mg GAE/g DE and of the ethanolic maceration: 20.625 mg GAE/g DE. The results of the determination of the anti-radical capacity by the DPPH method after calculation of the IC50, revealed that the infusion gives respectively in aqueous and ethanolic medium: 25.541 μg/ml and 48.269 μg/ml while the maceration leads to 29.187 μg/ml 50.999 μg/ml respectively. This study showed that each extract reacted with DPPH and the aqueous infusion was the most reactive.

Impact of Urban Solid Waste on the Water of the Kpondjo River(Sokode,Togo)

The main objective of the work is to search for relevant indicators for assessing the impact of waste on water quality and their contribution to climate change. The leaching test applied allowed accelerated access to the water-soluble material that can be mobilized in the various fractions of household and similar waste from the city of Sokodé, a material that can be salted out by leaching and leaching processes in nature. It has thus made it possible to evaluate the reactivity of the waste by promoting access to the composition and the quality of the released organic matter and to facilitate a follow-up of the recovery of the biological activity over a period of 120 hours. The study of physicochemical quality of the waters of Kpondjo River has shown a link between the deterioration of the quality of the river's water and the manner of waste management. The 17541 m3 of methane generated by sludge from slaughterhouses and fermentable fractions of solid waste, could contribute to climate change. Indeed, a composting valorization of biodegradable fraction of solid waste that is generated in this town would reduce the methane produced by this waste and thus help to reduce global warming trends.