Zobrazeno 1 - 10
of 80
pro vyhledávání: '"M.A.S. Oliveira"'
Autor:
B. Aquino, A.A. Stefanello, M.A.S. Oliveira, F.O. Pedrosa, E.M. Souza, R.A. Monteiro, L.S. Chubatsu
Publikováno v:
Brazilian Journal of Medical and Biological Research, Vol 48, Iss 8, Pp 683-690 (2015)
NifA is the transcriptional activator of the nif genes in Proteobacteria. It is usually regulated by nitrogen and oxygen, allowing biological nitrogen fixation to occur under appropriate conditions. NifA proteins have a typical three-domain structure
Externí odkaz:
https://doaj.org/article/354de773b4db4fe1ab06e6c4d3b1bdfd
Publikováno v:
Materials Research, Vol 3, Iss 3, Pp 51-60 (2000)
The kinetic model for change of phases developed by M. Avrami at the end of the thirties has been used to describe the temporal behavior of phase changes. Until today this model is studied and adapted to include broader hypotheses. However, the mathe
Externí odkaz:
https://doaj.org/article/c808ae6973f0454c96a81b06fcbd7737
Akademický článek
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Publikováno v:
Química Nova v.40 n.2 2017
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova, Volume: 40, Issue: 2, Pages: 146-153, Published: FEB 2017
Química Nova, Vol 40, Iss 2, Pp 146-153
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova, Volume: 40, Issue: 2, Pages: 146-153, Published: FEB 2017
Química Nova, Vol 40, Iss 2, Pp 146-153
Epoxy resins are an important class of thermostable polymers, widely used in structural applications or as adhesives. However, the low fracture resistance is their main weakness in many applications. Due to this fact, this study aims to modify a poly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11779e2ba5378bb4788125ff27a75a27
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422017000200146
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422017000200146
Akademický článek
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Publikováno v:
Progress in Organic Coatings. 65:348-356
Films of polyaniline doped with poly(methylmethacrylate-co-acrylic acid) – PAni-PMMA-co-AA – were prepared on AA3104-H19 alloy, an aluminum alloy used in the Brazilian can industry, by immersion of the pre-treated surfaces into a PAni-PMMA-co-AA
Publikováno v:
Journal of the European Ceramic Society. 25:743-748
PZT powders were synthesized by a chemical method using the conventional Pechini method and a urea-modified Pechini method, where the smooth pH increase, by the decomposition of urea, allows a better control of the pH. The FTIR spectra revealed that
Autor:
Gilmar Patrocínio Thim, Hermi F. Brito, Sandra A. Silva, Maria C.F.C. Felinto, M.A.S. Oliveira
Publikováno v:
Journal of Solid State Chemistry. 171:375-381
The photoluminescence properties of the Eu3+ ion doped into α-cordierite were studied based on the excitation and emission spectra and lifetime measurements. These samples were prepared by the sol–gel method and calcined by heating the xerogel at
Autor:
A.L. Campos, Francisco Cristóvão Lourenço de Melo, N. T. Silva, M.A.S. Oliveira, Gilmar Patrocínio Thim
Publikováno v:
Journal of Non-Crystalline Solids. 304:19-24
The kinetics parameters of orthorhombic mullite (o-mullite) crystallization from a diphasic gel were measured using a non-isothermal differential thermal analysis method. The diphasic gel was obtained from aqueous solutions containing silic acid and
Publikováno v:
Journal of Non-Crystalline Solids. 304:31-35
α-Cordierite (Mg2Al4Si5O18) was obtained, by a sol–gel aqueous route, from aqueous solutions containing Si:Al:Mg in a molar ratio equal to 5:2.15:2.25 and citric ( l cit samples), or oxalic ( l ox samples), or tartaric acid ( l tart samples), in s