Studies on Antioxidant Properties before and after UV- And Γ-Irradiation of Bulgarian Lavender Essential Oil Isolated fromLavandula AngostifoliaMill

Comparative Real Time EPR Investigation of Natural and Synthetic Antioxidants: As Potential Anticancer Agents and Radio-protectors

“…Findings that of SQGD and P. corylifolia showed close DPPH activity which was not affected after radiation might be partially explained with presence of similar radical structures confirmed formerly and by the present EPR study. In a large number of studies was reported that low doses of ionising radiation did not affect in antioxidant activity and protective effects of natural compounds, which also additionally supported present results [27][28][29][30] . Building on evidence demonstrating the selective accumulation of TEMPO 36 and the accumulation of synthetic antioxidants and triazenes in certain organs and blood 15 were studied and compared the biodistribution of spin-labelled nitrosoureas and plant antioxidants.…”

“…EPR spin trapping technique allows be monitored processes related to generating unstable radicals (ROS and RNS), the mechanisms of their transformations and changes in membraneoxidation levels 27 . Moreover, EPR spectra provide information about chemical structure of the studied radicals and as well as, evaluation of antioxidant activity and radical-scavenging capacity 27 of different compounds 27,28 . All advantages of EPR spectroscopy led us to conduct current research.…”

Investigation of the modulatory role of Bulgarian Mentha Piperita L. oil against radiation-induced oxidative disorders and antioxidant status In Vitro

“…The emergence of a new radical structure in 10 Gy irradiated M. piperita oil is due the lower g-value. Similar structural alterations after radiation exposure were recorded in Lavandula Angustifolia M., Rosa Damascena L. and Silybum Marianum [56,57,58]. DPPH stable radical easily react with in vitro antioxidants and free radicals that possess functional groups donating H .…”

“…IR is recognized method for maintaining the quality of aromatic herbs, oils, spices and vegetable, for a long time (Directive 1999/3/EC) [21]. Increased antioxidant activity was observed in essential oils derived from pre-irradiated leaves and fruits [22,23]. Statistical analyses of antioxidant effects of UVB and gamma (γ) radiation on the content of volatile oils in spices showed that there were significant differences between γ-radiated and samples alone [22][23][24].…”

“…The usage of in vitro and in vivo model systems, serve as models for preliminary observations in the evaluation of pharmacological activities, radiation-induced oxidative changes in chemical composition and different EPR spectrum shapes as a function of temperature and time [23,25,26].…”