Identification of irradiated sage tea (Salvia officinalis L.) by ESR spectroscopy |
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| Authors: | Semra Tepe Çam Birol Engin |
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| Institution: | 1. Gazi University, Faculty of Medicine, Biophysics Department, 06500 Be?evler, Ankara, Turkey;2. Turkish Atomic Energy Authority, Sarayköy Nuclear Research and Training Center, 06983 Ankara, Turkey;1. Turkish Atomic Energy Authority, Sarayköy Nuclear Research and Training Center, 06983, Saray, Ankara, Turkey;2. Physics Department, Faculty of Science, Dokuz Eylül Üniversity, 35390, Buca, ?zmir, Turkey;3. Institute of Nuclear Sciences, Ankara University, Be?evler, 06100, Ankara, Turkey;1. Institute of Agriculture and Tourism, Karla Huguesa 8, 52440 Pore?, Croatia;2. Centre of Excellence for Biodiversity and Molecular Plant Breeding, Sveto?imunska 25, 10000 Zagreb, Croatia;3. Institute for Adriatic Crops and Karst Reclamation, Put Duilova 11, HR-21000 Split, Croatia;4. Department of Food Technology and Control, Faculty of Medicine, University of Rijeka, HR-51000 Rijeka, Croatia;1. Departamento de Química, Instituto Nacional de Investigaciones Nucleares, Apdo. Postal 18-1027, 11801 Ciudad de México, Mexico;2. Instituto Tecnológico de Toluca, Ex-Rancho la Virgen S/N, Metepec, Mexico;1. Turkish Atomic Energy Authority, Sarayköy Nuclear Research and Training Center, 06983 Saray, Kazan, Ankara, Turkey;2. Dokuz Eylül University, Faculty of Science, Department of Physics, 35160 Buca, ?zmir, Turkey |
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| Abstract: | The use of electron spin resonance (ESR) spectroscopy to accurately distinguish irradiated from unirradiated sage tea was examined. Before irradiation, sage tea samples exhibit one asymmetric singlet ESR signal centered at g=2.0037. Besides this central signal, two weak satellite signals situated about 3 mT left and right to it in radiation-induced spectra. Irradiation with increasing doses caused a significant increase in radiation-induced ESR signal intensity at g=2.0265 (the left satellite signal) and this increase was found to be explained by a polynomial varying function. The stability of that radiation-induced ESR signal at room temperature was studied over a storage period of 9 months. Also, the kinetic of signal at g=2.0265 was studied in detail over a temperature range 313–353 K by annealing samples at different temperatures for various times. |
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