THE USE OF EPR SIGNALS OF PLANTS AS BIOINDICATIVE PARAMETERSIN THESTUDY OF ENVIRONMENTAL POLLUTION
Objective: The change of the signal intensity of the electron paramagnetic resonance (EPR) of plants as privet-Ligustrum japonicum, olive â€“ Olea europea and pyrocantha â€“ Pyracantha coccinea was studied. Ä°n the study of environmental pollution was used EPR signals of plants.
Methods: In all study areas the exposure dose rate (EDR) was measured using a MKS- 1125 AT, Atomtex dosimeter - radiometer. EPR spectra of dry plant objects were recorded using "BRUKER" EPR spectrometer. Radionuclide composition and specific activity of radionuclides in the samples were determined by gamma spectrometry.
Results: It is shown that the intensity of the broad EPR signal (Î”HÂ â‰ˆÂ 450Â G, gÂ =Â 2.32) that presumably belong to iron oxide nanoparticles, rises with the increase of environmental pollution. The comparative analysis of intensity changes of broad EPR signals depending on the level of contamination was studied. EDR of the areas where plants were collected was measured. The elemental and radionuclide composition was determined and the specific activity of radionuclides in the leaves of test plants was measured.
Conclusion: The obtained results allow us to use the EPR spectra that belong to nanoparticles of iron oxide as bio indicative parameters of environmental pollution.
2. Garibov AA, Parmon VN, Agaev TN, Kasumov RD. Influence of the polymorphous forms of the oxide and the temperature on the transfer of energy during radiation-induced heterogeneous processes in the Al2O3+H2O System. High Energy Chem 1991;25(2):86-90.
3. Khalilov RI, Nasibova AN. The endogenous EPR-detectable iron nanoparticles in plants. News Baku University 2010;3:35-45.
4. Khalilov RI, Nasibova AN, Serezhenkov VA, Ramazanov MA, Kerimov MK, Garibov AA, et al. Accumulation of magnetic nanoparticles in plants grown on soils of apsheron peninsula. Biophysics 2011;56:316-22.
5. Gubin SP, Koksharov Yu A, Khomutov GB, Yurkov GY. Magnetic nanoparticles: preparation, structure and properties. Russ Chem Rev 2005;74:539-74.
6. Khomutov GB, Koksharov YA. In: â€œMagnetic Nanoparticlesâ€, Edited by SP Gubin. WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim; 2009. p. 117-95.
7. Yashchenok AM, Gorin DA, Badylevich M, Serdobintse AA, Bedard M, Fedorenko YG, et al. Impact of magnetite nanoparticle incorporation on optical and electrical properties of nanocompositeLbL assemblies. J Physical Chem Chem Physics 2010;12:10469-75.
8. Giersig M, Khomutov GB. Nanomaterials for application in medicine and biology. Springer, Dordrecht, The Netherlands; 2009. p. 178-88.
9. Lesin VI, KoksharovYu A, Chomutov GB. Magnetic nanoparticles inoil colloidal particles fractal aggregates. Transp Process 2009;3:95-7.
10. Mann S. Biomineralization: Principles and Concepts in Bioinorganic Materials Chemistry. Oxford Univ. Press, Oxford; 2001. p. 103-24