@Article{PortugalPilBodRotAnd:2014:AlZwFo,
               author = "Portugal, Williamary and Pilling, Sergio and Boduch, Philippe and 
                         Rothard, Hermann and Andrade, Diana P. P",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Radiolysis of amino acids by heavy and energetic cosmic ray 
                         analogues in simulated space environments: alpha-glycine 
                         zwitterion form",
              journal = "Monthly Notices of the Royal Astronomical Society",
                 year = "2014",
               volume = "441",
                pages = "3209--3225",
             keywords = "laboratory, cosmic rays, molecules, molecular data, 
                         astrochemistry, astrobiology.",
             abstract = "In this work, we studied the stability of the glycine molecule in 
                         the crystalline zwitterion form, known as \α-glycine 
                         (+NH3CH2COO\−), under the action of heavy cosmic ray 
                         analogues. The experiments were conducted in a high vacuum chamber 
                         at the heavy-ion accelerator Grand Acc{\'e}l{\'e}rateur National 
                         dIons Lourds (GANIL), in Caen, France. The samples were bombarded 
                         at two temperatures (14 and 300 K) by 58Ni11+ ions of 46MeV, up to 
                         a final fluence of 1013 ion cm\−2. The chemical evolution 
                         of the sample was evaluated in situ using a Fourier Transform 
                         Infrared Spectrometer (FTIR). The bombardment at 14K produced 
                         several daughter species, such as OCN\−, CO, CO2 and 
                         CN\−. The results also suggest the appearance of peptide 
                         bonds during irradiation, but this must be confirmed by further 
                         experiments. The half-life of glycine in the interstellar medium 
                         was estimated to be 7.8 × 103 yr (300 K) and 2.8 × 103 yr (14K). 
                         In the Solar system, the values were 8.4 × 102 yr (300 K) and 3.6 
                         × 103 yr (14 K). It is believed that glycine could be present in 
                         space environments that suffered aqueous changes, such as the 
                         interiors of comets, meteorites and planetesimals. This molecule 
                         is present in the proteins of all living beings. Therefore, 
                         studying its stability in these environments will provide further 
                         understanding of the role of this species in prebiotic chemistry 
                         on Earth.",
                  doi = "10.1093/mnras/stu656",
                  url = "http://dx.doi.org/10.1093/mnras/stu656",
                 issn = "0035-8711",
                label = "lattes: 4597543516602317 1 PortugalPilBodRotAnd:2014:GlZwFo",
             language = "en",
           targetfile = "MNRAS-2014-Portugal-3209-25.pdf",
        urlaccessdate = "04 jun. 2024"
}