3 documents found, page 1 of 1
Excitation and Ionic Fragmentation of Gas-Phase Biomolecules using Electrons an...
Souza, Gerardo Gerson Bezerra de; Coutinho, Lúcia H.; Nunez, Cecilia Veronica; Bernini, Rafael B.; Castilho, Roberto B. de; Lago, Alexsande F.
Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310...
Bernini, Rafael Berrelho; Coutinho, Lúcia H.; Nunez, C. V.; Castilho, R. B. de; Souza, Gerardo Gerson Bezerra deIsoprene, C5H8, is a biogenic volatile compound emitted from plants and animals, playing an important role in atmospheric chemistry. In this work, we have studied the ionic fragmentation of the isoprene molecule induced by high energy photons (synchrotron radiation), both at the valence (12.0, 14.0, 16.0, 18.0, and 21.0 eV) and carbon 1s edge (270 and 310 eV, respectively, below and above edge) energies. The io...
Elemental concentration and sulfur chemical speciation in the amazonian plant a...
Gonzalez, Joselaine C.; Simões, Grazieli; Bernini, Rafael Berrelho; Coutinho, Lúcia H.; Stedile, Fernanda Chiarello; Nunez, C. V.The inorganic composition of the bark and leaf of a plant from the Amazon rainforest, Andira surinamensis, was determined using two non-destructive, multi-element techniques: X-ray fluorescence (XRF) and Rutherford backscattering spectrometry (RBS). XRF measurements were made using both a conventional X-ray source and synchrotron radiation. It was observed that although magnesium, aluminum, silicon, phosphorus,...