| Abstract [eng] |
Living organisms are continually affected by ionizing radiation emitted by natural sources, such as cosmic rays and radionuclides. Low-energy electrons are generated due to the interaction of gamma and Röntgen rays with biomolecules. These low-energy electrons damage molecules, including amino acids. In this dissertation, the fragments that are produced during L-threonine, L-glutamic acid, L-glutamine, L-leucine and L-isoleucine fragmentation were identified. Additionally, the fragmentation process of these amino acids in vacuum and water was also examined. The results indicate that the production of positively charged fragments with the same mass and chemical composition in water required more appearance energy than that in vacuum. It was determined that the structures of fragments with the same mass and chemical composition depend on the environment. Additionally, L-glutamic acid and L-glutamine, with a similar mass but different chemical compositions, were found to undergo fragmentation in a similar manner. The obtained results also showed that L-leucine and L-isoleucine, with the same mass and chemical composition but different geometrical structures, were also found to undergo fragmentation in a similar manner. |
