Investigation of 60Co γ-irradiated l-(−) malic acid, N-methyl-dl-valine and l-glutamic acid γ-ethyl ester by electron paramagnetic resonance technique

Gama Işınları ile Işınlanmış Amino Asit Türevlerinin EPR ve Simulasyon Metodu ile İncelenmesi

“…The linewidth of the spectrum is somewhat larger than the hyperfine coupling constant of the nitrogen nuclei, and therefore the hyperfine splitting of the nitrogen nuclei is not observed in the spectrum. A similar situation has been observed in some studies in the literature [23][24][25][26]. The intense nine-line spectrum arises from the hyperfine interaction with four protons of nearly equal magnitude.…”

EPR study of γ-irradiated tetra-N-butylammonium iodide

“…The average values for a C α H 2 , a C β H 2 and g-value are 15.5G, 15.5G and 2.0023, respectively. The EPR parameters obtained from our study are in good agreement with values in the literature for similar radicals (2,(4)(5)(6)(7)(8)(9)(10)(11)(12) and are given in Table 2.…”

“…Therefore, we concluded that there is one radical. According to the chemical structure of the substance and the available data in literature (2,(4)(5)(6)(7)(8)(9)(10)(11)(12), these intensity ratios were attributed to + 60 Co-γ The spectra of intensity ratios indicate that the unpaired electron spin interacts with six hydrogen protons of the tetra-N-butylammonium iodide sample. Therefore, the spectra are attributed to the (C α H 2 C β H 2 C γ H 2 CH 3 ) radical.…”

EPR and FT-IR spectroscopic studies of l-lysine monohydrochloride and l-glutamic acid hydrochloride powders

“…Furthermore, the study of the nucleosome core showed that the direct interactions between DNA and histone predominantly involve arginine and lysine [4]. Glutamic acid is a potential source of energy and it is important in brain metabolisms [5].…”