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Tea extracts as free radical scavengers

100%

Gramza A., Pawlak-Lemanska K., Korczak J., Wasowicz E., Rudzinska M.

Polish Journal of Environmental Studies

2005

tom 14

nr 6

Antiradical activity was measured with the use of two different methods of scavenging the stable free radicals ABTS+• and DPPH• . Examined tea extracts showed different antiradical activity. Best activity in scavenging ABTS+• expressed as TAA (total antioxidant activity) showed black tea aqueous and ethanol extracts. Green tea extracts were four times less effective. Antiradical activity showed that the lowest concentration needed to scavenge the 50% of initial DPPH• radical (EC₅₀) was green and black tea ethanol extracts. Aqueous extracts showed 50% lower activity than equivalent ethanol extracts. Research proved that antiradical activity of plant extracts is dependent on mechanisms of oxidative activity of free radicals used and the chemical structure of contained antioxidants.

Can the Rosa canina plant be used against alkylating agents as a radical scavenger?

80%

Kizilet H., Kasimoglu C., Uysal H.

Polish Journal of Environmental Studies

2013

tom 22

nr 4

In this study we used the somatic mutation and recombination test (SMART) in Drosophila melanogaster to evaluate the genotoxicity of ethyl methanesulfonate (EMS) and the effect of Rosa canina L. ethanol extract (RCeta) on the genotoxicity of EMS. Application groups were prepared as Drosophila instant medium (DIM), including only 1ppm EMS and different concentrations (1, 2, and 4ppm) of RCeta were added to DIM, including 1 ppm EMS. As a result of our study, statistically significant genotoxic effects of EMS (P<0.05) were removed by RCeta. A particularly positive genotoxic effect of EMS has become inconclusive/ negative efficacy in both wing phenotypes on 2 and 4 ppm EMS+RCeta application groups.

Ograniczanie wyników

2 Polish Journal of Environmental Studies

1 Gramza A.

1 Kasimoglu C.

1 Kizilet H.

1 Korczak J.

1 Pawlak-Lemanska K.

1 Rudzinska M.

1 Uysal H.

1 Wasowicz E.

1 2013

1 2005

Wyniki wyszukiwania

Tea extracts as free radical scavengers

Can the Rosa canina plant be used against alkylating agents as a radical scavenger?