Radiation damage produced in powder of α-(methylamino)isobutyric acid, α -aminoisobutyric acid methyl ester hydrochloride and diethylmalonic acid

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

“…The radiation damage centers of these samples have been attributed to the HOOCCH 2 CH 2 Ċ HCOOH radical and the reported values of the hyperfine constants a LGAHCl. Moreover, the g value of the radical discussed here seems to be in agreement with the literature data for their analogs and various other alkyl type radicals [28][29][30].…”

Identification of free radicals induced by gamma irradiation in amino acid derivatives

“…The simulation of the spectrum, with the above given values, is shown in figure 1b. The g value and the hyperfine constants of methyl protons of the radical discussed here agree well with some other literature data [21][22][23][24]. In the gamma irradiated N-formyl-L-leucine, at room temperature, the free radical has been attributed to the (CH 3 ) 2Ċ CH 2 CH(NHCOH)CO 2 radical [25].…”

Stability toward High Energy Radiation of Non-Proteinogenic Amino Acids: Implications for the Origins of Life

“…The radiolysis of amino acids was studied in the past for various reasons ranging from food sterilization [ 48 , 49 ] to radiation dose determination [ 50 ], taking advantage of the fact that amino acids are able to form stable radicals [ 51 , 52 , 53 , 54 , 55 ]. About amino acids radiolysis, there are available also the very important and classical works of Bonner and colleagues [ 21 , 56 , 57 , 58 , 59 , 60 ], which were specifically designed to test the Wester-Ulbricht hypothesis that parity violation in the β-decay may have originated the enantiomeric excess in the biochemical world, and the work of Kminek and Bada [ 61 ].…”

“…It is expected that also the radiolysis of α-methyl amino acids and β-amino acids should yield ammonia as the main radiolysis product [ 54 ].…”