Zobrazeno 1 - 10
of 509
pro vyhledávání: '"M. M. OLIVEIRA"'
Autor:
M. C. Viegas, G. P. de Figueredo, S. F. Rodrigues, A. A. Cabral, M. A. M. Castro, M. M. Oliveira
Publikováno v:
Cerâmica, Vol 69, Iss 389, Pp 1-5 (2023)
Abstract CuCrO2 was synthesized by solution combustion synthesis (SCS) and applied as a heterogeneous catalyst to produce soybean biodiesel. The combustion reaction was carried out using urea as a fuel, and copper (II) and chromium (III) nitrates as
Externí odkaz:
https://doaj.org/article/43ffa316fea3475db1be3b5ff2668cb5
Publikováno v:
Cerâmica, Vol 67, Iss 381, Pp 28-31 (2021)
Abstract MnTiO3 is a semiconductor that has relevant dielectric and optical properties. For the synthesis of manganese titanate (MnTiO3) powders, the combustion method via microwave and subsequent calcination at 500, 700, and 900 °C were used. The s
Externí odkaz:
https://doaj.org/article/d5f74d5be4ce4698ae8f7b9560f2939c
Publikováno v:
Cerâmica, Vol 66, Iss 380, Pp 474-482 (2020)
Abstract This study aimed to obtain ceramic filters with bactericidal action for water disinfection. For this, aqueous suspensions of montmorillonite K10 clay were prepared at concentrations of 48%, 50%, and 52%. Later, these were impregnated into po
Externí odkaz:
https://doaj.org/article/247d91f21cd44ea6a9db372374b19927
Autor:
F. N. Morgado, L. M. V. de Carvalho, J. Leite-Silva, A. J. Seba, M. I. F. Pimentel, A. Fagundes, M. F. Madeira, M. R. Lyra, M. M. Oliveira, A. O. Schubach, F. Conceição-Silva
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
Abstract The clinical presentations of skin diseases produced by different pathogens, as American tegumentary leishmaniasis (ATL) and sporotrichosis can be similar and possibly influenced by the skin immune system (SIS). The aim of the study was to u
Externí odkaz:
https://doaj.org/article/3e1a4b23c850435f82be61c1be2b08ad
Publikováno v:
Biologia Plantarum, Vol 61, Iss 4, Pp 631-640 (2017)
Seasonal growth is characteristic for many tree species including almond. Varying conditions during the season are responsible for growth cessation, bud set, dormancy entry, cold hardening, and bud burst. Here, we report the characterization of an al
Externí odkaz:
https://doaj.org/article/b20cb91cca7a48a3b7dedd3bf70b2fd0
Outcomes from patients with presumed drug resistant tuberculosis in five reference centers in Brazil
Autor:
D. M. P. Ramalho, P. F. C. Miranda, M. K. Andrade, T. Brígido, M. P. Dalcolmo, E. Mesquita, C. F. Dias, A. N. Gambirasio, J. Ueleres Braga, A. Detjen, P. P. J. Phillips, I. Langley, P. I. Fujiwara, S. B. Squire, M. M. Oliveira, A. L. Kritski, for Rede-TB Study group
Publikováno v:
BMC Infectious Diseases, Vol 17, Iss 1, Pp 1-13 (2017)
Abstract Background The implementation of rapid drug susceptibility testing (DST) is a current global priority for TB control. However, data are scarce on patient-relevant outcomes for presumptive diagnosis of drug-resistant tuberculosis (pDR-TB) eva
Externí odkaz:
https://doaj.org/article/d39c6d1b5f5145e3b64deabbe4217a04
Publikováno v:
Cerâmica, Vol 60, Iss 355, Pp 397-401 (2014)
As propriedades físicas e químicas de materiais em escala nanométrica são de imenso interesse e sua importância tem crescido em diversas aplicações tecnológicas. Este trabalho abordou o estudo da influência do método hidrotermal assistido p
Externí odkaz:
https://doaj.org/article/c16096c91fad47a6aded95216a7d0a50
Autor:
R. L. Brito, P. A. P. Pessôa, J. S. Vasconcelos, L. P. S. dos Santos, J. H. G. Rangel, E. Longo, V. C. de Sousa, M. A. Ramirez, M. M. Oliveira
Publikováno v:
Cerâmica, Vol 58, Iss 347, Pp 349-356 (2012)
Neste trabalho foi realizado um estudo das propriedades elétricas de blocos varistores à base de SnO2. Foram avaliadas a não linearidade destas cerâmicas por meio da caracterização tensão-corrente, bem como a altura, largura e os portadores de
Externí odkaz:
https://doaj.org/article/709e93b65bf14681a16e92367e1fcf09
Publikováno v:
Cerâmica, Vol 58, Iss 346, Pp 151-157 (2012)
An investigation was made of the microstructural and electrical properties of SnO2-based varistors microwave sintered at 1200 ºC, applying a heating rate of 120 ºC/min and treatment times of 10, 20, 30, 40, 50 and 60 min. The system used in this st
Externí odkaz:
https://doaj.org/article/86ec26efe69b4b80ab1a1bac7ca70178
Publikováno v:
Cerâmica, Vol 54, Iss 331, Pp 296-302 (2008)
O estudo da adição de dopantes trivalentes é uma das principais pesquisas na área de varistores. Vários autores têm buscado entender os efeitos destes dopantes nas propriedades elétricas e microestruturais destas cerâmicas eletrônicas. Tanto
Externí odkaz:
https://doaj.org/article/d26e675198a343e6a6c95c5fd9637e5f