Encontrados 45 documentos, a visualizar página 1 de 5
Influence of composition, bonding characteristics and microstructure on the ele...
Borges, Joel; Fonseca, C.; Barradas, Nuno P.; Alves, Eduardo; Girardeau, Thierry; Paumier, Fabien; Vaz, F.; Marques, L.Thin films of AlOxNy were deposited by magnetron sputtering in a wide composition range. Different structures and morphologies were observed, depending on the composition and bonding states, which opened the possibility to tailor the properties of this oxynitride system between those of pure Al and those of nitride and oxide films. In a wide range of stoichiometries, one can report the formation of nanocomposit...
Influence of stoichiometry and structure on the optical properties of AlNxOy films
Borges, Joel; Barradas, N. P.; Alves, Eduardo; Beaufort, Marie France; Eyidi, Dominique; Vaz, F.; Marques, L.The AlNxOy system offers the possibility to obtain a wide range of responses, by tailoring the properties between Al, AlN and Al2O3, opening a significant number of possible applications. The aim of this work is to correlate the optical properties of AlNxOy thin films with their composition and structural features, taking as reference the binary systems AlNx and AlOy. In the AlNx system, the increase of the nit...
Electrical and optical properties of AlNxOy thin films deposited by reactive DC...
Borges, Joel; Martin, Nicolas; Barradas, Nuno; Alves, Eduardo; Eyidi, Dominique; Beaufort, Marie France; Girardeau, Thierry; Paumier, Fabien; Vaz, F.Resumo e poster ; Aluminium, Al, is a metallic material used in a large variety of technological fields, such as surface plasmon-coupled emission (SPCE) devices for biochemical applications and it is also a good candidate to be used as nonresonante plasmonic nanoparticle in thin-film silicon solar cells. Aluminium nitride, AlN, is a semiconductor material and it can be used in the fabrication of optical sensor...
Effects of annealing on the electrical and optical properties of AlNxOy thin films
Borges, Joel; Arvinte, R.; Barradas, Nuno; Alves, Eduardo; Camelio, Sophie; Girardeau, Thierry; Paumier, Fabien; Vaz, F.; Marques, L.Resumo e poster ; Aluminium oxynitride is known to be a ceramic material with high strength and hardness, resulting from a stabilization of alumina (Al2O3) with nitrogen, in a cubic spinel structure, at thermodynamic conditions very different from those found in low plasma temperature deposition processes. Beyond this stable phase of AlNxOy, the available knowledge on this system is still very reduced and the ...
Potential of essential oils for the control of brown eye spot in coffee plants
Pereira,Ricardo Borges; Lucas,Gilvaine Ciavareli; Perina,Fabiano José; Resende,Mário Lúcio Vilela de; Alves,EduardoThe objectives of this work were to assess the in vitro effect of essential oils extracted from cinnamon, citronella, lemon grass, India clove, tea tree, thyme, neem and eucalyptus on the conidia germination and on mycelial growth of Cercospora coffeicola, and their efficacy to control the brown eye spot in coffee seedlings (cultivars Catucaí 2SL, Catuaí IAC 62 and Mundo Novo 379/19) in a greenhouse, as well as...
Anatomia foliar de microtomateiros fitocromo-mutantes e ultra-estrutura de clor...
Melo,Hyrandir Cabral de; Castro,Evaristo Mauro de; Alves,Eduardo; Perina,Fabiano JoséPlantas fitocromo-mutantes têm sido utilizadas com o intuito de caracterizar isoladamente, dentre os demais fotorreceptores, a ação dos fitocromos sobre eventos ligados à fotomorfogênese. Raros são os estudos que relatam a ação dos fitocromos sobre aspectos estruturais, embora sejam fundamentais à compreensão do desenvolvimento das plantas. Neste trabalho, objetivou-se analisar características ultraestruturais ...
Polar S810 como recurso alternativo ao eletrocardiograma no teste de exercício ...
Pimentel,Alan Santos; Alves,Eduardo da Silva; Alvim,Rafael de Oliveira; Nunes,Rogério Tasca; Costa,Carlos Magno Amaral; Lovisi,Júlio Cesar MoraesFUNDAMENTO: O teste de exercício de 4 segundos (T4s) avalia o tônus vagal cardíaco durante o transiente inicial da frequência cardíaca (FC), em exercício dinâmico súbito, por meio da identificação do índice vagal cardíaco (IVC) obtido a partir do eletrocardiograma (ECG). OBJETIVO: Testar a utilização do monitor de frequência cardíaca (MFC) Polar S810 como recurso alternativo ao ECG na aplicação do T4s. MÉTODOS:...
Ultrastructural calli analysis of Inga vera Willd. subsp. Affinis (DC.) T.D. Penn
Stein,Vanessa Cristina; Paiva,Renato; Vargas,Daiane Peixoto; Soares,Fernanda Pereira; Alves,Eduardo; Nogueira,Gabriela FerreiraSubcellular changes are relevant to understand plant organogenesis and embryogenesis in the early stages of cell development. The cytology during cell development in tissue culture is however still poorly characterized. This study aimed to characterize the ultrastructural differences related to callogenesis of anthers, ovaries, leaf and nodal segments of Inga vera Willd. subsp. Affinis (DC.) T.D. Penn. Flower b...
Bacterial spot and early blight biocontrol by epiphytic bacteria in tomato plants
Lanna Filho,Roberto; Romeiro,Reginaldo da Silva; Alves,EduardoThe objective of this work was to evaluate in vitro and in vivo biocontrol of bacterial spot (Xanthomonas vesicatoria) and early blight (Alternaria solani) by the epiphytic bacteria Paenibacillus macerans and Bacillus pumilus. Tomato plants were previously sprayed with epiphytic bacteria, benzalkonium chloride and PBS buffer and, after four days, they were inoculated with A. solani and X. vesicatoria. To determ...
Teores de pigmentos fotossintéticos e estrutura de cloroplastos de Alfavaca-cra...
Martins,Joeferson Reis; Alvarenga,Amauri Alves de; Castro,Evaristo Mauro de; Silva,Ana Paula Oliveira da; Alves,EduardoA Alfavaca-cravo é uma espécie medicinal produtora de óleo essencial de elevada eficácia no combate de diversos organismos patogênicos. Por isso, o entendimento do comportamento fisiológico dessa espécie e as respostas desse comportamento às condições do ambiente tornam-se necessários ao aperfeiçoamento dos métodos de cultivo. Nesse contexto, este estudo objetivou avaliar o efeito da intensidade e qualidade da ...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||