"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

EPR investigation of antioxidant characteristics of some irradiated natural extracts

D. PETRISOR1, G. DAMIAN1,* , S. SIMON1, SCHMUTZER1, A. HOSU2, V. MICLAUS2

Affiliation

  1. Babes-Bolyai University, Faculty of Physics, Cluj-Napoca, Romania
  2. Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, Cluj-Napoca, Romania

Abstract

The aim of the present work is to study the antioxidant characteristics of some irradiated natural extracts, like white Seaberry (Hippophae Rhamnoides) and Spirulina (Spirulina Platensis) using EPR (Electron Paramagnetic Resonance) spectroscopy technique. The methods used in this research concern the utilization of stable free radicals from nitrone classes, like nitroxide radical Tempol (2,2,6,6-tetramethyl-4-hydroxypiperidine-oxyl) and spin trap PBN (N-t-Butyl- α- phenylnitrone). The purpose is to see which are the changes induced in antioxidant activity by irradiation process, depending on irradiation absorbed doses. For low adsorbed doses was observed an increasing of antioxidant activity for all studied samples..

Keywords

Antioxidant characteristics, EPR Spectroscopy, Free radicals, Tempol, PBN.

Submitted at: Nov. 15, 2006
Accepted at: March 15, 2007

Citation

D. PETRISOR, G. DAMIAN, S. SIMON, SCHMUTZER, A. HOSU, V. MICLAUS, EPR investigation of antioxidant characteristics of some irradiated natural extracts, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 3, pp. 760-763 (2007)