Artigos Científicos - FACFIS/ICEN
URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/3216
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Navegando Artigos Científicos - FACFIS/ICEN por Assunto "Amazônia brasileira"
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Item Acesso aberto (Open Access) Characterization of Buriti (Mauritia flexuosa L.) oil by absorption and emission spectroscopies(2005-12) ALBUQUERQUE, Marcos Lázaro de Souza; SILVA, Ilde Guedes da; ALCANTARA JUNIOR, Petrus Agrippino de; MOREIRA, Sanclayton Geraldo Carneiro; BARBOSA NETO, Newton Martins; CORRÊA, Daniel Souza; ZILIO, Sérgio CarlosOil samples obtained from Buriti (Mauritia flexuosa L.) palm tree fruits were characterized by absorption and emission spectroscopies. The absorption spectrum was recorded in the range from 300 to 2000 nm, while the emission spectrum was analyzed between 400 and 800 nm, where several bands were observed. To better understand these complex spectra, we recorded both absorption and emission spectra of its major components. By correlating these data, we present a discussion on the possible origin of the bands observed.Item Acesso aberto (Open Access) Determinação da velocidade e sentido do fluxo de águas subterrâneas utilizando radioisótopos pela técnica do poço único(2008-06) NERY, José Reinaldo Cardoso; FERREIRA, Leopoldino dos Santos; MOURA, Helyelson ParedesRadioisotope methodology through the single-well technique have been used with the objective of determining velocity and direction of groundwater flow with radioactive tracers in boreholes located at Universidade Federal do Pará (UFPA), Belém-PA, Brazil, next to Guamá river. We used radiotracer iodine-131 and data was acquired by means of espectrometric system with radiation detectors. The application of this technique to determine jointly velocity and direction of flow, despite not usual, appeared to be a good alternative for further practical applications.Item Acesso aberto (Open Access) Sir William Thomsom e a instalação do cabo telegráfico submarino entre Pernambuco e o Pará(2007) BASSALO, José Maria Filardo; CRISPINO, Luís Carlos BassaloIn this paper we report the participation of Sir William Thomson in the installation of the submarine telegraph cable between Pernambuco and Pará by the Western and Brazilian Telegraph Company in August and September of 1873.