Antioxidant, antimicrobial and anti-inflammatory activities development of methanol extract of Cyclamen africanum B. et R., growth in Jijel - Algeria

The genus Cyclamen L. (Primulaceae) is represented by 20 species, where inter alia Cyclamen africanum B. et R, is the only endemic species presented in Algeria. The study of their biological potentialities was evaluated through antioxidant, antimicrobial and anti-inflammatory activities. The antioxidant activity was evaluated by DPPH and the reducing power essay, the antimicrobial activity was tested with three bacterial strains and one yeast (Staphylococcus aureus ATCC25923, Klebsiella pneumonia ATCC700603, Bacillus subtilis ATCC6633 and Candida albicans ATCC1024) and anti-inflammatory activity with the Human Red Blood Cell (HRBC) membrane stabilization method. The results demonstrate a perfect antioxidant activity and an excellent anti- inflammatory power at very small concentrations. Keywords: Cyclamen; crude extract; reducing power; antimicrobial; HRBC

In-vitro Antioxidant and anti-inflammatory activities valorisation of tannin crude extract of Helianthemum helianthemoïdes (Desf.) Grosser

Plants have always been used by humans to relieve and cure many diseases unfortunately the majority of them still unknown. The aims of this study were to evaluate the antioxidant and anti-inflammatory properties of tannin crude extract of Helianthemum helianthemoïdes (Desf.) Grosser. The antioxidant activity was performed by DPPH radical scavenging method and the reducing power essay; however, the anti-inflammatory activity was tested with the Human Red Blood Cell (HRBC) membrane stabilization method. The obtained results indicated high antioxidant potential and a perfect anti-inflammatory agent. Keywords: Helianthemum helianthemoïdes;  DPPH; reducing power; HRB

Antimicrobial and Antioxidant Activities of Flavonoids Extracted from Pistacia lentiscus L., Leaves

Increasingly, the flavonoids becoming the subject of biomedical researches, and many groups have isolated and identified the structures of flavonoids possessing important biological activities. This assess investigates the antimicrobial fight and the antioxidant strengths of flavonoids extracted from Pistacia lentiscus L. leaves.  The extract was first analyzed for its phenolic content, then the flavonoids were tested for their antimicrobial capacities by the method of diffusion against fourteen bacteria, two fungi and one yeast. The minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) of flavonoids were determined using the dilution method on solid medium, however, the antioxidant activity was evaluated through the ability of the extract to scavenge DPPH (1,1-diphenyl-2-picrylhydrazyl) radicals and the reducing power essay. The results indicate that flavonoids extract contain other phenolics groups. On the other side, the Antibacterial tests exhibited different activities depending on the strains. Unlike, the MIC and the MBC showed that the flavonoids extract showed a best activity against Candida albicans and Vibrio cholerae. Concerning antioxidant activity, the results indicate a moderate capacity of the flavonoid extract. These preliminary results may justify the use of this plant in the treatment of some diseases and may be exploited for therapeutic purposes. Keywords: Antimicrobial, Antioxidant, Pistacia lentiscus, flavonoids, MIC, MBC

Bis(2,2′-bi-1H-imidazole)­copper(II) bis­(1,1,3,3-tetra­cyano-2-eth­oxy­propenide)

In the title compound, [Cu(C6H6N4)2](C9H5N4O)2, the Cu2+ ion (site symmetry ) is coordinated by two N,N′-bidentate 2,2′-biimidazole (H2biim) ligands, generating a square-planar CuN4 geometry. The dihedral angle between the aromatic rings in the ligand is 0.70 (9)°. In the polynitrile 1,1,3,3-tetra­cyano-2-eth­oxy­propenide (tcnoet) anion, the C—N, C—C and C—O bond lengths indicate extensive electronic delocalization. An alternative description for the metal-ion geometry is an extremely distorted CuN6 octa­hedron, with two N-bonded tcnoet anions completing the coordination. In the crystal, the components are linked by N—H⋯N and C—H⋯N inter­actions

Antioxidant and antimicrobial activities of flavonoids extract of Phlomis herba venti L.

Phlomis herba venti L is commun plant growth in fields of all Algeria, tested for their antioxidant and antimicrobial activity for the investigation of news natural alternatives products. Antioxidant properties were evaluated through the ability of the extract to scavenge DPPH radicals and the reducing power essay, however, the antimicrobial activity was tested with four bacterial strains and three fungi including yeast (Staphylococcus aureus ATCC25923, Escherichia coli ATCC 25922, Bacillus subtilis ATCC6633, Salmonella typhimurium ATCC 13311, Aspergillus niger 2CA936, Aspergillus flavius NRRL3357 and Candida albicans ATCC1024). The results give an excellent antioxidant capacities and a powerful effect against Aspergillus niger.