Mgo
Mostrando 1-12 de 287 artigos, teses e dissertações.
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1. Sedimentation and rheological behavior of reactive and non-reactive magnesium hydroxide pulps for industrial spray dryer processing
Abstract Two different reactive concentrated magnesium hydroxide (HM) pulps, produced in a lab reactor mill, and a synthetic and non-reactive HM-pulp, for comparative analyses, have been prepared and studied. Sodium polyacrylate was selected as a dispersant for improving the HM pulp fluidity, with concentrations varying from 0.42% to 2.0% on a dry basis. The
Cerâmica. Publicado em: 2023
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2. Evaluation of the self-healing capacity of ceramics produced with alumina and silicon carbide
Abstract The self-healing capacity of a ceramic material produced by uniaxial pressing with alumina (Al2O3), silicon carbide (SiC), and magnesium oxide (MgO) was evaluated. To assess self-healing, a discontinuity was generated on the surface of the specimens. The healing time in the oven, at a temperature of 1000 ºC, was 1, 30, and 60 min. The specimens wer
Cerâmica. Publicado em: 2022
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3. Dolomite-zirconia reaction sintered bonded coarse magnesia ceramics: effect of the bonding proportion
Abstract Refractory ceramic materials were manufactured, mainly composed of magnesia grains (coarse and medium fraction) and CaZrO3/MgO as a binding phase produced from the reaction sintering between CaMg(CO3)2 (dolomite) and m-ZrO2 (monoclinic zirconia), which constituted the finer fraction. Different relationships between the proportion and the size of the
Cerâmica. Publicado em: 2021-06
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4. Editorial Comment: Luts-V: A new simplified score for assessing lower urinary tract symptoms in men
Abstract Refractory ceramic materials were manufactured, mainly composed of magnesia grains (coarse and medium fraction) and CaZrO3/MgO as a binding phase produced from the reaction sintering between CaMg(CO3)2 (dolomite) and m-ZrO2 (monoclinic zirconia), which constituted the finer fraction. Different relationships between the proportion and the size of the
Int. braz j urol.. Publicado em: 2021-06
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5. Oxidative Stress & Male Infertility - A necessary and conflicted indissociable marriage: How and when to call for evaluation?
Abstract Refractory ceramic materials were manufactured, mainly composed of magnesia grains (coarse and medium fraction) and CaZrO3/MgO as a binding phase produced from the reaction sintering between CaMg(CO3)2 (dolomite) and m-ZrO2 (monoclinic zirconia), which constituted the finer fraction. Different relationships between the proportion and the size of the
Int. braz j urol.. Publicado em: 2021-06
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6. Editorial Comment: Vasectomy re-reversal: effectiveness and parameters associated with its success
Abstract Refractory ceramic materials were manufactured, mainly composed of magnesia grains (coarse and medium fraction) and CaZrO3/MgO as a binding phase produced from the reaction sintering between CaMg(CO3)2 (dolomite) and m-ZrO2 (monoclinic zirconia), which constituted the finer fraction. Different relationships between the proportion and the size of the
Int. braz j urol.. Publicado em: 2021-06
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7. Dysplasia of the fibrous sheath with axonemal and centriolar defects combined with lack of mitochondrial activity as associated factors of ICSI failure in primary ciliary dyskinesia syndrome
Abstract Refractory ceramic materials were manufactured, mainly composed of magnesia grains (coarse and medium fraction) and CaZrO3/MgO as a binding phase produced from the reaction sintering between CaMg(CO3)2 (dolomite) and m-ZrO2 (monoclinic zirconia), which constituted the finer fraction. Different relationships between the proportion and the size of the
Int. braz j urol.. Publicado em: 2021-06
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8. Design, Synthesis, and Application of Colored Cobalt Pigments (Pink, Blue, Green)
The combination of white or colorless oxides (MgO, Al2O3, ZnO) with colorant ions (Co2+) generates colored pigments (pink, blue, green). The color is caused by the insertion of the colorant ion in the respective crystal lattices (periclase, alumina, wurtzite), as verified by X-ray diffraction. Absorption spectra in the visible region show analogous triplet b
J. Braz. Chem. Soc.. Publicado em: 2020-11
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9. Influência do MgO e CaCl 2 nas propriedades reológicas de argilas bentoníticas dos novos depósitos da Paraíba-Brasil utilizando planejamento experimental e análise estatística
Resumo Novos depósitos de argila bentonítica foram descobertos no estado brasileiro da Paraíba, sendo o mais recente no município de Olivedos. Estudos recentes descobriram a presença de altos níveis de minerais não argilosos que podem produzir resultados insatisfatórios ao tentar usar essas argilas em fluidos de perfuração. Para torná-los adequado
Cerâmica. Publicado em: 2020-03
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10. Avaliação do desempenho de manta geotêxtil em reator em batelada sequencial no tratamento de esgoto sanitário
RESUMO No presente trabalho, foi avaliado o desempenho de um sistema de lodo ativado em batelada, com módulo de filtração, proporcionado por uma manta geotêxtil, na remoção de matéria orgânica presente em esgoto sanitário. O reator em escala piloto tinha volume útil de 85 L e foi operado durante 182 dias, com tempo total de ciclo de 24 horas de dur
Eng. Sanit. Ambient.. Publicado em: 2020-03
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11. CATALYST PREPARATION METHODS TO REDUCE CONTAMINANTS IN A HIGH-YIELD PURIFICATION PROCESS OF MULTIWALLED CARBON NANOTUBES
Abstract CoMo/MgO catalysts with low loading of cobalt and molybdenum were prepared by incipient wetness impregnation and the sol-gel method for high yield production of carbon nanotubes (CNT). A detailed characterization of the catalysts, as-produced CNT and purified CNT, indicated a relationship between carbon nanotube properties, synthesis and purificatio
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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12. Lodo ativado com aeração prolongada operado sob baixa concentração de oxigênio dissolvido: comportamento cinético das bactérias heterotróficas e autotróficas nitrificantes
RESUMO Este trabalho teve como objetivo a determinação dos parâmetros cinéticos que descrevem o crescimento das bactérias heterotróficas e autotróficas nitrificantes em três sistemas de lodos ativados com aeração prolongada, operados com baixa aeração, a fim de se obter a remoção de nitrogênio de esgoto sanitário pelo processo de nitrificaç�
Eng. Sanit. Ambient.. Publicado em: 25/11/2019