Comparison of antioxidative activity data for aqueous extracts of lemon balm (Melissa officinalis L.), oregano (Origanum vulgare L.), thyme (Thymus vulgaris L.), and agrimony (Agrimonia eupatoria L.) obtained by conventional methods and the DNA-based biosensor

Ľ. Heilerová, M. Bučková, P. Tarapčík, S. Šilhár and J. Labuda
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Ľ. Heilerová: Food Research Institute Bratislava, Biocentre Modra, Modra, Slovakia
M. Bučková: Food Research Institute Bratislava, Biocentre Modra, Modra, Slovakia
P. Tarapčík: Food Research Institute Bratislava, Biocentre Modra, Modra, Slovakia
S. Šilhár: Food Research Institute Bratislava, Biocentre Modra, Modra, Slovakia
J. Labuda: Food Research Institute Bratislava, Biocentre Modra, Modra, Slovakia

Czech Journal of Food Sciences, 2003, vol. 21, issue 2, 78-84

Abstract: The antioxidative properties of aqueous plant extracts were evaluated using common methods such as the Rancimat and 2,2'-diphenyl-1-picrylhydrazyl (DPPH) free radical method. Moreover, a voltammetric procedure based on the protective effect of antioxidants against the oxidative DNA damage was employed using a disposable DNA biosensor fabricated as a screen-printed electrode chemically modified by calf thymus double stranded (ds) DNA. The total polyphenols were also determined spectrophotometrically with the Folin-Ciocalteu agent. The extracts of oregano and lemon balm exhibited significantly higher activity than those of thyme and agrimony. The results were treated statistically and their operational character is discussed.

Keywords: antioxidants; plant extracts; Rancimat method; DPPH radical; DNA biosensor (search for similar items in EconPapers)
Date: 2003
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:21:y:2003:i:2:id:3480-cjfs

DOI: 10.17221/3480-CJFS

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