Faten Abbassi's scientific contributions

In the present study, the phenolic compounds, mineral composition, of ethanol and water extracts from different Reamuria vermiculata parts (leaves, stems and roots) was investigated. The antioxidant and antimicrobial proprieties were screened using experimental and computational approaches. Results have reported that the fraction aqueous of roots had a higher amount of polyphenol, flavonoid and tanins than stems and leaves (1153.29 mg GAE/g, 308.16 mg CE/g, 31.84 mg CE/g DW) respectively. Also, the same extract has significant scavenging activity to decrease free radicals especially for DPPH (IC50 = 0.04 mg/mL), ABTS radicals (IC50 = 0.002 mg/mL) and β-carotene (IC50 = 0.06 mg/mL). In addition, the minerals K, Mg, Na, and Ca were detected as considerably high quantities in leaves. Moreover, the ethanol extract of roots exhibited an antimicrobial property against bacterial strains Listeria monocytogenes with MIC =0.0781 mg/ml, staphylococcus aureus and Bacillus subtilis with MIC = 0.3125 mg/ml. The overall results provided some valuable information that spices have powerful antioxidant and antimicrobial potentials, which could be an interesting material for industrial purposes.

The aim of this study is to determine the phytochemical analyses, antioxidant and antimicrobial activities of Reamuria vermiculata leaves extracts. Organic extracts (methanol, hexane, ethyl acetate, petroleum ether) were screened for their biochemical composition as well as antioxidant and antibacterial activities. In fact, Phytochemical screening of Reamuria vermiculata leaves showed the presence of flavonoids, coumarins, saponins, tannins, terpenes, and quinones. Biochemical screening showed that the methanol was the richest extract in phenolic and tanins with 179.68 mg GAE/ g and 56.25 mg CE/g, respectively. The analysis of DPPH radical scavenging activity and ABTS showed an important scavenging with ethyl acetate extract with IC50 of 0.0012mg/mL, and 0.0006mg/mL respectively. As well as, the methanol extract exhibited an antimicrobial property against bacterial strains. Listeria monocytogenes and Salmonella typhimurium were the most sensitive strains with minimum inhibitory concentration values of 0.3125 mg/mL. These results allow us to propose that Reamuria vermiculata is an excellent source for bioactive molecules exhibiting interesting biological capacities.