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Antimicrobial and antioxidant activity of the polyphenol mangiferin

100%

Stoilova I., Gargova S., Stoyanova A., Ho I.

Herba Polonica

2005

tom 51

nr 1-2

The antimicrobial effect of the polyphenol mangiferin obtained from leaves of mango tr was studied according to the diffusion method. The solutions of mangiferin in polyetl ene glycol-400 showed an activity with regard to seven bacterial and five fungal spec - Bacillus pumilus, Bacillus cereus, Staphylococcus aureus, Staphylococcus citreus, Escherichia ( Salmonella agona, Klebsiella pneumoniae, Saccharomyces cerevisiae, Thermoascus aurantiai Trichoderma reesei, Aspergillus ßavus and Aspergillus fiimigatus. Its antioxidant activity w regard to the free radical 2,2-diphenyl-l-picrylhydrazyl (DPPH) was also studied, as concentration of mangiferin causing 50% inhibition of the free radical (ICS0) was assa; to be 7.5 ± 0.0075 jug/ml.

Antioxidant activity of extract from elder flower [Sambucus nigra L.]

88%

Stoilova I., Wilker M., Stoyanova A., Krastanov A., Stanchev V.

Herba Polonica

2007

tom 53

nr 1

The antioxidant activity of an extract from elder flower (Sambucus nigra L.) was tested by assessing its ability to neutralize DPPH and hydroxyl (OH•) radicals. The IC50 concentrations for the inhibition of the respective radicals were found to be 0.152 μg/ml and 0.0122 μg/ml. The extract possesses antioxidant activity in a linoleic acid model system, as 0.005% extract concentration resulted in 57.60% inhibition of conjugated dienes formation, while at a concentration of 0.01% the extract inhibited 76.02% of the generation of secondary linoleic acid oxidized products.

Ograniczanie wyników

2 Herba Polonica

2 Stoilova I.

2 Stoyanova A.

1 Gargova S.

1 Ho I.

1 Krastanov A.

1 Stanchev V.

1 Wilker M.

1 2007

1 2005

Wyniki wyszukiwania

Antimicrobial and antioxidant activity of the polyphenol mangiferin

Antioxidant activity of extract from elder flower [Sambucus nigra L.]