2010
DOI: 10.1590/s0103-97332010000400013
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Study of the structure of free radicals in gamma: irradiated amino acid derivatives

Abstract: Electron paramagnetic resonance spectroscopy has been used for the study of the free radicals produced in the powders of L-arginine monohydrochloride, ala-ala and DL-β-leucine gamma-irradiated at room temperature.The structures of the radicals formed in compounds were determined as NH 2 (NH)NHĊHCH 2 CH 2 CH(NH 2 )COOH, CH 3Ċ HCOOH and (CH 3 ) 2Ċ CH(NH 2 )CH 2 COOH respectively. The paramagnetic species were found to be stable at room temperature more than three months. It was determined that unpaired electron … Show more

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Cited by 5 publications
(3 citation statements)
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“…The species found in the paramagnetic field were determined as anions radical with an unpaired electron positioned on the carboxyl carbon (Silva et al, 2008). It is seen that the hyperfine constants are slighter than anion radicals of other amino acids (Aydin, 2010). At around 3300 G (g-factor = 2.0), the peak is related to glycine residue, appeared~•CH as a minor product.…”
Section: Discussionmentioning
confidence: 90%
See 1 more Smart Citation
“…The species found in the paramagnetic field were determined as anions radical with an unpaired electron positioned on the carboxyl carbon (Silva et al, 2008). It is seen that the hyperfine constants are slighter than anion radicals of other amino acids (Aydin, 2010). At around 3300 G (g-factor = 2.0), the peak is related to glycine residue, appeared~•CH as a minor product.…”
Section: Discussionmentioning
confidence: 90%
“…At around 3300 G (g-factor = 2.0), the peak is related to glycine residue, appeared~•CH as a minor product. The other compound of homolytic scission is ~ (O) C• radical that demonstrated an important singlet (Aydin, 2010). The methylene group is capable to offer hydrogen atoms to both radicals •~ which leads to the ~CH formation.…”
Section: Discussionmentioning
confidence: 99%
“…Also, EPR provides the most complete information about the structure and the motional behavior of radicals [40][41][42].…”
Section: Introductionmentioning
confidence: 99%