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2008 | 58 | 2 |

Tytuł artykułu

Antioxidant activity of phenolic fractions of Litsea monopetala [Persimon-leaved litsea] bark extract

Treść / Zawartość

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Phenolic compounds were extracted from Litsea monopetala bark using methanol. Four fractions (I-IV) were separated from extract on a Sephadex LH-20 column using methanol as the mobile phase evaluated for their total antioxidant activity, antiradical activity against DPPH•, (2,2-diphenyl-1-picrylhydrazyl radical), and reducing power. The total phenolics and tannin contents of the fractions were determined. The highest relative content in the crude extract was found for fraction I. The content of total phenolics in fractions ranged from 169 mg/g (fraction I) to 753 mg/g (fraction II). Condensed tannins were detected in fractions II-IV. The fractions exhibited the total antioxidant activity from 1.90 mmol Trolox/g (fraction I) to 7.06 mmol Trolox/g (fraction IV). Fraction III was characterised by the highest antiradical activity against DPPH• (EC50 = 0.011 mg/assay). Fractions II and III showed the strongest reducing power which was app. four times higher than that of fractions I. The presence of three main phenolic compounds in fraction I was confirmed using RP-HPLC.

Wydawca

-

Rocznik

Tom

58

Numer

2

Opis fizyczny

p.229-233,fig.,ref.

Twórcy

autor
  • Polish Academy of Sciences, Tuwima 10, P.O.Box 55, 10-747 Olsztyn, Poland
autor
autor
autor
autor

Bibliografia

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Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

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