Results 51 to 60 of about 45,927 (121)

Expediente

Revista Espaço, 1991
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Editor/a Espaço
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Avaliação do efeito da moagem no desempenho e na caracterização DRIFT-NIR de microbicidas na superfície de tintas comerciais

Polímeros, 2014
Neste trabalho, é mostrada a avaliação da técnica FT-IR, refletância difusa (DRIFT), na região NIR (DRIFT/NIR) para a caracterização de OIT, carbendazim e diuron em composições de tintas acrílicas, contendo esses microbicidas moídos e reduzidos a ...
Ricardo Pedro, Rita de Cássia Lazzarini Dutra, Milton Faria Diniz, Elizabeth da Costa Mattos   +3 more
doaj   +1 more source

Caracterização por FT-IR da superfície de borracha EPDM tratada via plasma por micro-ondas

Polímeros, 2012
A superfície de uma borracha de etileno-propileno-dieno (EPDM) vulcanizada foi modificada via plasma por microondas, com gases Ar, Ar/O2, N2/O2 e N2/H2, tendo como objetivo melhorar as propriedades adesivas da superfície.
Renata P. dos Santos, Mauro S. de O. Junior, Elizabeth da C. Mattos, Milton F. Diniz, Rita de C. L. Dutra   +4 more
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Modelling solar radial velocities and photometric variability with SOAP

Astronomy & Astrophysics
Context. Stellar activity remains one of the main limitations in the detection of Earth-like planets using radial velocity (RV) measurements. The Sun, as the only star for which surface features can be spatially resolved, offers a unique testbed for ...
Barka A., Cristo E., Santos Â. R. G., Santos N. C., Al Moulla K., Barata T., Gafeira R., Cretignier M.   +7 more
doaj   +1 more source

Impact of stellar spots on the high-resolution transmission spectra of a giant planet around a Sun-like star

Astronomy & Astrophysics
Context. Transmission spectroscopy has enabled the analysis of exoplanet atmospheres. However, a major challenge in this field is the “noise” from host stars, caused by stellar activity such as dark spots and bright plages.
Lucero Jennifer P., Demangeon O. D. S., Cristo E., Dethier W., Santos N. C.   +4 more
doaj   +1 more source

Lasers e preenchimentos: possíveis complicações

Surgical & Cosmetic Dermatology, 2017
O tratamento das cicatrizes de acne, queixa dermatológica comum e motivo de ansiedade para os pacientes é desafiante, consistindo geralmente em múltiplas abordagens seriadas.
Bruna Sabatovich Villarejo Iosifovich, Bruna Melhoranse Gouveia, Maria Paulina Villarejo Kede   +2 more
doaj   +1 more source

ADN – THE NEW OXIDIZER AROUND THE CORNER FOR AN ENVIRONMENTALLY FRIENDLY SMOKELESS PROPELLANT. doi:10.5028/jatm.2009.0102153160

Journal of Aerospace Technology and Management, 2011
The search for a smokeless propellant has encouraged scientists and engineers to look for a chlorine-free oxidizer as a substitute for AP (ammonium perchlorate).
Márcio Y. Nagamachi, José Irineu S. Oliveira, Aparecida M. Kawamoto, Rita de Cássia L. Dutra   +3 more
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THE ROLE OF ANTIOXIDANT ON PROPELLANT BINDER REACTIVITY DURING THERMAL AGING. doi: 10.5028/jatm.2010.02027310

Journal of Aerospace Technology and Management, 2011
Thermal aging of hydroxy-terminated polybutadiene (HTPB) stabilized with 2,6-di(tert-butyl)hydroxytoluene (BHT) was carried out at 60°C from 1 to 11 weeks.
Luciene Dias Villar, Rafael Filadelfo da Silva, Milton Faria Diniz, Marta Ferreira K. Takahashi, Luis Claúdio Rezende   +4 more
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Exploring the surface of HD 189733 via Doppler shadow analysis of planetary transits

Astronomy & Astrophysics
Context. Transmission spectroscopy has advanced our understanding of exoplanet atmospheres, but it can be hindered by contamination originating in stellar heterogeneities, mainly coming from line-of-sight effects.
Gonçalves E. C., Cristo E., Dethier W., Santos N. C., Sousa S. G., Viana P. T. P., Azevedo Silva T., Allart R., Bourrier V.   +8 more
doaj   +1 more source

MICROWAVE ABSORBING PAINTS AND SHEETS BASED ON CARBONYL IRON AND POLYANILINE: MEASUREMENT AND SIMULATION OF THEIR PROPERTIES. doi: 10.5028/jatm.2010.02016370

Journal of Aerospace Technology and Management, 2011
This paper presents the processing and characterization of electromagnetic radiation absorbing paints and sheets based on magnetic and dielectric materials dispersed in polymeric matrices.
Luiza de C. Folgueras, Mauro A. Alves, Mirabel C. Rezende   +2 more
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