Encontrados 6 documentos, a visualizar página 1 de 1
Innovative reactor prototype for Hydrogen production in a stationary applicatio...
Barbosa, Rui; Ferreira, V.; Silva, D.; Condes, J.; Ramos, S.; Amaral, V.; Pinto, A. M. F. R.; Figueiredo, A.; Rangel, C. M.Hydrogen storage has proved to be the greatest obstacle preventing hydrogen from replacing fossil fuels. Hence, a safe, efficient and economical method of storing hydrogen must be available to turn viable a hydrogen economy based on renewable resources [1]. Hydrogen can be stored in chemical hydrides such as sodium borohydride (NaBH4), with large theoretical H2 content of 10,9 wt%. With the aid of catalysts, an...
Magnetic and transport studies of [sigma]-phase Fe50V50 alloys with different t...
Costa, B. F. O.; Amaral, V. S.; Le Caër, G.; Braga, M. E.; Amado, M. M.; Rocco, D. L.; Sousa, J. B.http://www.sciencedirect.com/science/article/B6TXM-4TRM3MB-3/2/a3801608d0695335d1eccf6692a4287d
Planktonic availability and settlement of Carcinus maenas megalopae at high tem...
Amaral, V.; Queiroga, H.; Skov, M.; Paula, J.The current conceptual model of reinvasion and settlement for estuarine brachyuran crabs in mesotidal systems is that megalopae undergo selective tidal stream transport, in an upstream direction, and settle by the end of the flood tide. Recent studies on recruitment processes of Carcinus maenas (L.) have reported a clear decoupling between supply, as larval influx, and settlement events in the lower Mira Estuar...
Mechanically induced phase transformations of the sigma phase of nanograined an...
Costa, B. F. O.; Caër, G. Le; Loureiro, J. M.; Amaral, V. S.A coarse-grained tetragonal sigma phase [sigma]-Fe0.54Cr0.46, prepared from an as-cast alloy, and a nanocrystalline [sigma]-Fe0.52Cr0.48 phase were ball-milled in argon in a Fritsch P0 ball-mill at different vibration amplitudes. X-ray diffraction evidences solely a gradual transformation of the sigma phases into bcc phases. Room-temperature Mössbauer spectroscopy shows further the presence of a non-magnetic ph...
Cytological and histopathological aspects of lipomas in Bothrops moojeni
Cassali,G.D.; Amaral,V.F.; Silva,A.E.; Macri,I.; Maciel,R.O presente relato descreve os achados citológicos e histológicos de seis neoplasias benignas em cinco ofídios da espécie Bothrops moojeni mantidas em cativeiro por um período médio de 11,4 anos. Os animais apresentavam nódulos subcutâneos com localização variada desde o terço anterior até a porção mediana. Os exames citológico e histopatológico revelaram tratar-se de tumores lipomatosos benignos compatíveis com...
Espectroscopia Raman em compostos KBr-Br2, KI-Br2 e do HOPG-Br2
Vanda do Amaral V. PedreiraThe ionics crystals KBr and KI do not present Raman activity. Raman spectra of these crystals after immersing in liquid bromine exhibits lines with frequencies identified as been due to the compounds KBr3 and IBr, to the alotrophics forms 79Br - 79Br, 79Br- 81Br and 81Br - 81Br and to the ions Br3- and Br5-. -Raman spectra of highly oriented pyrolitic graphite (HOPG) intercalated with Br2 were also investigated...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||