антиоксидант

Algerian flora contains a wide range of aromatic plants of great therapeutic interest thanks to their biologically active secondary metabolites which makes them a subject of scientific interest. In this work, we were interested in Ocimum basilicum L. of Lamiaceae family cultivated and harvested in Biskra city located at South-East of Algeria. Phytochemical screening has been per-formed to reveal the presence of flavonoids, tannins, coumarins, essential oil, and other phytochemicals. The contents of total polyphenols, total flavonoids and total tannins have been determined.

Snails are often found in Indonesia, especially at Kediri, but the snail shell has no commercial value. This research report describes the characterization and antioxidant activity of chitosan from snail shell waste (chitosan-SSW) by ultrasonic technique and analyzes the potential of chitosan as an inhibitor of receptors of free radicals using an in silico molecular docking method.

Some new hydroxyxanthone compounds were prepared through one pot cyclodehydration reaction of hydroxybenzoic acid derivatives (salicylic acid or resorcylic acid) with phloroglucinol or pyrogallol in the presence of Eaton’s reagent (P2O5/MeSO3H). The synthesized compounds were screened for their antioxidant activities by 2,2-diphenyl-1-picrylhydrazyl (DPPH) methods to determine their inhibitory concentration (IC50). Cytotoxicity of the prepared compounds was also evaluated by MMT assay on Vero cell line.