Résumé:
Plant-based NP green synthesis is now regarded as a gold standard among these green biological
techniques owing to its ease of use and the diversity of plants. However, (MnO NPs) have gained
importance in the synthesis and manufacturing processes because of their lower toxicity. The aim of
this study was to quantify the phytochemical Ocimum basilicum L. compounds and to greenly
synthesize of manganese oxide nanoparticles (MnO NPs) using basil leaves aqueous extract and their
in vitro antioxidant power assessment. Bioactive molecules extraction and qualitative analysis of some
phytochemical compounds were released by using standard protocols. Moreover, green synthesis of
manganese oxide nanoparticles was carried up. In vitro anti-oxidant power was studied by DPPH
freeradical scavenging activity and ferric reducing antioxidant power FRAP. Results of phytochemical
essays showed that aqueous extract of Ocimum basilicum L. is very rich on different chemical
compounds such as saponins phenols, flavonoids, catechic tannins, saponins, reducing sugars, alkaloids
and terpenes. The UV-Vis absorption of NPs presenting the maximum absorption peak at the
wavelength of 405 nm that confirm the MnO NPs' green synthesis. IC50 values in the DPPH and FRAP
assays indicate that this plant has a high anti-oxidant activity. In conclusion, this study confirmed that
aqueous extract of Ocimum basilicum L. is rich of important bioactives compounds that have potential
properties as biocatalyst for the biosynthesis of manganese oxide nanoparticles (MnO NPs). In addition,
MnO NPs was able to induce highly effective anti-oxidant power which qualify to protect against
oxidative stress
