Basic ESR studies on recent corals

ESR investigation of gamma irradiated sulbactam sodium

“…4, respectively. Calculated rhombic g values correlate well with both experimental g values determined in the present work for strong resonance peaks: 8 (g 8 = 2.0082); 9 (g 9 = 2.0057); 10 (g 10 = 2.0022) and with those reported in the literature for SO 2 − ionic radical induced in sulphur containing compounds irradiated by gamma radiation [7][8][9][10][11][12][13][14]. In fact, SO 2 is the most sensitive sub group to radiation in SS molecule due to its high electrophilic feature, and is expected to be at the origin of the observed three strong resonance lines dominating ESR spectra through the formation of SO 2 − ionic radical species that is called radical B in the present work.…”

“…Spectroscopic parameters determined from spectrum simulation calculations for proposed tentative radical species were found to correlate well with those reported in the literature for similar radicals [8][9][10][11][12][13][14][19][20][21]. Radical species A and B are relatively stable at room temperature, however, species B has a higher activation energy (E B = 82(±3) kJ/mol) than the species A (E A = 46(±4) kJ/mol).…”

Investigation of radiosterilization and dosimetric features of sulfacetamide sodium

“…The samples irradiated at room temperature were heated to predetermined temperatures (358, 393 and 413 K) kept at these temperatures for predetermined times (3,5,8,10,13,16,20,26,30,35,41,45,55, 60, 80, 90, 120, 160, 220 min), then they were cooled to room temperature and their ESR spectra were recorded. The results were the average of five replicates for each radiation dose.…”

“…SO 2 is the most sensitive group to radiation in SS molecule due to its high electrophilic feature. Therefore, radicals with unpaired electrons localised on SO 2 group is expected to be likely produced upon irradiation of SS as in the case of sulphur containing compounds [24][25][26][27][28][29][30]. These radicals exhibit no hyperfine structure and they have g tensor of orthorombic symmetry with an average value varying between 2.0037 and 2.0059 [24][25][26].…”

ESR response of gamma-irradiated sulfamethazine

“…Therefore, the radicals with unpaired electrons localized on S atoms are expected to be produced Downloaded by [Dalhousie University] at 09:47 10 October 2014 in sulfonamides and, as a member of this group, in SMH upon irradiation, as in the case of sulphur-containing compounds (7)(8)(9)(10)(11)(12)(13). Sulphur radicals do not exhibit hyperfine structures, but they have g tensors of orthorombic symmetry with an average value varying between 2.0037 and 2.0059 (7)(8)(9).…”