Výsledky vyhledávání - "R R, Gonçalves"

Synthesis, Structural, and Spectroscopic Properties of Ln3+ (Ln= Eu, Er and Yb) Doped Y2Sn2O7 Materials

Autor: M.V. Guidorzi, F.H. Borges, R. R. Gonçalves

Publikováno v: Latin America Optics and Photonics (LAOP) Conference 2022.

Synthesis, structural and spectroscopic properties of Ln3+ (Ln= Eu, Er and Yb) in Y2Sn2O7 materials synthesized by co-precipitation, calcined at 700, 900 and 1100 °C using as precursors the Tin (IV) chloride pentahydrate, yttrium chloride and ammoni

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba3c31d611457df7a86ea991da80b86e
https://doi.org/10.1364/laop.2022.w4a.51

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Ultra-long lifetime, persistent luminescence, and scintillation features of Pr3+ and Na+ doped yttrium tantalates

Autor: H. P. Labaki, F. J. Caixeta, N. P. Marques, E. J. Guidelli, L. C. V. Rodrigues, R. R. Gonçalves

Publikováno v: Latin America Optics and Photonics (LAOP) Conference 2022.

In this work, we report the synthesis, structural, morphological, and spectroscopic characterization of Pr3+ and Na+-doped yttrium tantalates. An ultra-long lifetime, persistent luminescence and scintillation were observed making these materials pote

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::da26624178ed355936f2e4d5eddbfbdd
https://doi.org/10.1364/laop.2022.tu4a.23

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The Effect of Reconnection to Mechanical Ventilation for 1 Hour After Spontaneous Breathing Trial on Reintubation Among Patients Ventilated for More Than 12 Hours: A Randomized Clinical Trial

Autor: Michelli M, Dadam, Anderson R R, Gonçalves, Gilvania L, Mortari, André P, Klamt, Andressa, Hippler, Juliane U, Lago, Cintia, Ponikieski, Bruna A, Catelano, Daniela, Delvan, Glauco A, Westphal

Publikováno v: Chest. 160(1)

The resting of the respiratory musculature after undergoing the spontaneous breathing trial (SBT) to prevent extubation failures in critically ill patients needs to be studied further.Is the reconnection to mechanical ventilation (MV) for 1 h after a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::b11fde0fb2ded3b4578ebc1a7977154d
https://pubmed.ncbi.nlm.nih.gov/34246361

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Akademický článek

DETERMINANTS AND CONSEQUENCES OF CONSUMER ENGAGEMENT IN VIRTUAL BRAND COMMUNITIES.

Autor: Cássia de Moura, Andréia¹ acassiabh@yahoo.com.br, Reis Monteiro, Plínio Rafael¹ preisufmg@gmail.com, Augusto Gonçalves, Márcio¹ marcioag@face.ufmg.br

Publikováno v: REMark: Revista Brasileira de Marketing. Jan-Mar2023, Vol. 22 Issue 1, p381-438. 58p.

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Synthesis, structural and morphological characterization of CeO2-ZnO nanosized powder systems from Pechini's method Síntese e caracterização estrutural e morfológica de partículas nanométricas do sistema CeO2-ZnO a partir do método Pechini

Autor: C. Peverari, A. M. Pires, R. R. Gonçalves, O. A. Serra

Publikováno v: Eclética Química, Vol 30, Iss 1, Pp 59-64 (2005)

This work reports on the investigation of nanosized CeO2-ZnO systems prepared by Pechini's method. The structural and morphological characterization of CeO2-ZnO systems as well as the characterization of CeO2 and ZnO separately, showed that the emplo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doajarticles::2a8fcf587f6d6a13315de991e50ca749
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702005000100008

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Energy-Transfer Mechanisms and Emission Quantum Yields In Eu3+-Based Siloxane-Poly(oxyethylene) Nanohybrids

Autor: L. D. Carlos, Sidney José Lima Ribeiro, R. A. Sá Ferreira and, R. R. Gonçalves and, V. de Zea Bermudez

Publikováno v: Chemistry of Materials. 13:2991-2998

We report the energy-transfer mechanisms and emission quantum yield measurements of sol−gel-derived Eu3+-based nanohybrids. The matrix of these materials, classified as diureasils and termed U(2000) and U(600), includes urea cross-links between a s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4f425383345e3ac73419589fb3501523
https://doi.org/10.1021/cm010311o

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Opinion

Autor: Norberto, Cabral, Anderson R R, Gonçalves

Publikováno v: Arquivos de neuro-psiquiatria. 71(6)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::142400f458898ac33ecd3074a401f79a
https://pubmed.ncbi.nlm.nih.gov/23175200

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Rare earth doped SnO2 nanoscaled powders and coatings: enhanced photoluminescence in water and waveguiding properties

Autor: R R, Gonçalves, Y, Messaddeq, M A, Aegerter, S J L, Ribeiro

Publikováno v: Journal of nanoscience and nanotechnology. 11(3)

Luminescent Eu3+ and Er3+ doped SnO2 powders have been prepared by Sn4+ hydrolysis followed by a controlled growth reaction using a particle's surface modifier in order to avoid particles aggregation. The powders so obtained doped with up to 2 mol% r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::9c0830972fa4185d53a8efe195604efd
https://pubmed.ncbi.nlm.nih.gov/21449404

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Broadband NIR emission in sol-gel Er(3+)-activated SiO2-Ta2O5 glass ceramic planar and channel waveguides for optical application

Autor: J L, Ferrari, K O, Limal, L J Q, Maia, S J L, Ribeiro, A S L, Gomes, R R, Gonçalves

Publikováno v: Journal of nanoscience and nanotechnology. 11(3)

An Er(3+)-doped SiO2:Ta2O5 optical channel waveguide and nanocomposite were prepared by the sol-gel route at a Si:Ta 50:50 molar ratio. Channels with an excellent surface profile were easily and quickly fabricated by focusing a femtosecond laser onto

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::846761b4bf35def08c3ccce45edabf79
https://pubmed.ncbi.nlm.nih.gov/21449421

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