This study aims to evaluate the metal pollution levels after water from the underground mine Kipushi located south of the Democratic Republic of Congo in the Kafubu River. To achieve this, the waters were sampled at three sampling campaigns (February, March and April of 2012) from the drain into the Katapula Kafubu River downstream of the confluence with the river Kipushi. It has been shown that cadmium and zinc values at 83.3% and 66.7% respectively were higher than those of the standard set by the European Union and 16.7%, 66.7% are higher as the Mining Regulations of the Democratic Republic of Congo for liquid effluents. Moreover, these high levels could pose health risks to the local population of Kafubu River. Our results serve as a warning bell to national environmental policies to protect the people living in a mining environment.
Antidrepanocytary activity of Ipomoea batatas, an edible and therapeutic plant used in traditional medicine of Katanga for burns and sickle cell disease was evaluated using the Emmel test. Crude extracts extracted by water, methanol and ethanol, have shown activity antidrepanocytory activity in vitro. The chemical screening showed that the leaves of Ipomoea batatas mainly contain alkaloids, flavonoids, tannins, quinones, leucoanthocyanes, saponins and steroids. The evaluation of the effect of heat, studied by UV-Visible spectrophotometry at 262nm for the aqueous extracts and at 268nm for the methanolic and ethanolic extracts by exposing extracts obtained in the oven at various times and temperatures, have shown that crude substances extracted from Ipomoea batatas are heat sensitive.
This work aimed to make a phytochemical study of nine vegetables (Adeniagummifera, Bidenspilosa, Celosia trigyna, Crassocephalumpicridifolium, Cleome monophylla, Fagarachalybeum, Solanumnigrum, Polygonumsalicifolumand Ipomoea Aquatica) consumed in Haut-Katanga and assess their antioxidant activity. The phytochemical study showed that each specie contains at least three groups of substances including tannins (88.8%), anthocyanins (88.8%) and flavanoids (77.8%), saponins (77, 7%), alkaloids (44.4%), cyanogenic glycosides (44.4%) and terpenoids (33.3%). The evaluation of the antioxidant activity showed that vegetables studied contain substances which are able to inhibit the action of free radicals as DPPH. Indeed, all the extracts inhibited DPPH with at least 19% during 10 or 30 minutes of incubation. Furthermore, evaluation of the effect of temperature has shown that antioxidants had reached a maximum concentration at 70
The chemical screening has showed that 17 edible and non-edible mushrooms studied contained saponins (100%), tannins (82.4%), anthocyanins (70.58%), coumarins (29.5%), flavonoids (23.5%) and steroids (17.6%). However, alkaloids, terpenoids and quinones have been identified in fungi studied. All of the extracts have inhibited the action of bacteria studied, but the most active extracts were those of Amanita rubescens (0.3125mg/mL), Schizophyllium commune (0.625mg/mL) and Trichaptum abietinum (0.625mg/mL) on S. aureus and Stereum hirsitum (0.625mg/mL) on S. aureus and S. pneumoniae. Moreover, all of extracts have got bacteriostatic effect (87.5%) on the tested germs except Ganoderma lucidum extract on S. aureus, Lactarius angusters on S. sonnei, Schizophyllium commune on S. sonnei and S. aureus, Trametes gibbosa on S. sonnei et de Trichaptum abietinum sur S. sonnei which have bactericidal effect against the same germs studied. Moreover, all the extracts showed antioxidant activity except extract Trichaptum abietinum.
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