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 study is related to a cross reading of the legislation governing the waste processing in the Democratic republic of the Congo (DRC), the Cameroon and in Congo-Brazza. It is important to note that one concise inventory of the legal texts reveal that there is an innovation in the taking into account of the question related to the non biodegradable packing in these countries. Thus, notwithstanding the relevant provisions relating to environmental protection envisaged in the legal and regulatory texts, the African cities in fact the megalopolis of Kinshasa in Congo and that of Yaound
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