Sba 15
Mostrando 1-12 de 63 artigos, teses e dissertações.
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1. Emergence delirium in children: a Brazilian survey
Abstract Background: Pediatric emergence delirium is characterized by a disturbance of a child’s awareness during the early postoperative period that manifests as disorientation, altered attention and perception. The incidence of emergence delirium varies between 18% and 80% depending on risk factors and how it is measured. Reports from Canada, Germany, I
Brazilian Journal of Anesthesiology. Publicado em: 2022
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2. Synthesis and characterization of mesoporous materials with SBA and MCM structure types
Resumo Materiais mesoporosos são estruturas promissoras para aplicação em catálise e adsorção devido à elevada área superficial e grande tamanho dos poros. Materiais mesoporosos foram sintetizados pelo método hidrotérmico com novos surfactantes, distintos daqueles observados na literatura, a fim de realizar um estudo de sua estrutura e obter materi
Cerâmica. Publicado em: 14/11/2019
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3. Influence of Crystallization and Ageing Time on the Reproducibility of Mesoporous Molecular Sieve SBA-15
ABSTRACT The study aimed to assess how the crystallization and ageing times in SBA-15 synthesis influence the reproducibility and particle size of mesoporous molecular sieves. X-ray diffraction showed that higher crystallization times provide greater reproducibility of mesoporous silica, due to the fact that there is no significant variation in the width and
Matéria (Rio J.). Publicado em: 10/06/2019
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4. Esterificação do ácido oleico utilizando aluminossilicato mesoporoso modificado com óxido de zircônio
RESUMO Os desafios decorrentes do aumento populacional, do uso extensivo e degradação dos recursos naturais e da dependência dos recursos fósseis, tem despertado o interesse pelo desenvolvimento de tecnologias para a produção de combustíveis renováveis. Dentro deste contexto tecnologias para a produção de biodiesel tem sido bastante estudadas de fo
Matéria (Rio J.). Publicado em: 20/05/2019
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5. Incorporating Aluminum Into the Structure of SBA-15 by Adjusting the pH and Adding NaF
The Al incorporation on SBA-15 type material and the effects of pH adjusting and presence of NaF were studied. The direct synthesis method was performed for comparison. The following parameters were evaluated: the Si/Al ratio, pH increase, and amount of NaF added. These parameters have a great influence on the synthesis of the mesoporous Al/SBA-15 type, but
Mat. Res.. Publicado em: 18/04/2019
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6. Importance of the Order of Addition of the Alumina Precursor and its Type Into Al-SBA-15 Mesoporous Materials for Use as Water Adsorbents
In the present report, Al-SBA mesoporous materials were investigated for use as water adsorbents. Different precursors for aluminum were investigated: aluminum sulfate and nitrate, boehmite, and aluminum tri-sec-butoxide. Furthermore, three different procedures for addition of the silica and alumina sources were tested. Samples were characterized by nitrogen
Mat. Res.. Publicado em: 10/12/2018
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7. SBA-15 as a Support for Nickel-Based Catalysts for Polymerization Reactions
Two mesoporous SBA-15 materials with different morphologies (spherical and fiber-shaped) were synthesized and evaluated as supports for nickel-based catalysts for polymerization reactions. The supports were pretreated with trimethylaluminum (TMA), and the catalyst dibromo-bis(4-amino-2,3,5,6-tetramethylimino)acenaphthene nickel(II) was attached to the suppor
J. Braz. Chem. Soc.. Publicado em: 2018-02
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8. Termodinâmica da adsorção de CO2 em materiais mesoporosos impregnados com níquel
Resumo A capacidade de adsorção de CO2 em materiais mesoporosos com estruturas diferentes foi avaliada. Para este efeito, MCM-48 e SBA-15 impregnados com níquel em proporções de 5%, 10% e 20% (m/m) foram utilizados. Os resultados mostraram que a impregnação com níquel promoveu um aumento da interação entre o CO2 e a superfície do material. Os dado
Cerâmica. Publicado em: 2017-12
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9. Persistência de anticorpos seguida de vacina conjugada meningocócica C em crianças e adolescentes infectados por vírus da imunodeficiência humana
Resumo Objetivo: As pessoas infectadas pelo HIV (HIVI) estão sujeitas a infecção meningocócica e apresentam menor resposta a vacinas. São escassos os dados a respeito da persistência de longo prazo do anticorpo bactericida no soro humano (hSBA) após vacina conjugada meningocócica C (MCC) em HIVI jovens e visamos a descrever essa persistência em HIV
J. Pediatr. (Rio J.). Publicado em: 2017-10
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10. Effect of the chemical attack on the properties of cimentititous composites with partial substitution of ash from sugar cane bagasse in natura
ABSTRACT Seeking the reutilization of waste from agriculture and urban sources, studies have presented an option in the inclusion of such waste into new low-cost materials that are environmentally viable. One possibility is the reutilization of sugarcane bagasse ashes (SBA), the final waste in the productive process of the Brazilian alcohol sector. In additi
Matéria (Rio J.). Publicado em: 20/07/2017
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11. Seroprevalence of bactericidal antibodies against serogroup B and C Meningococci in a University Hospital
Meningococcus serogroup B (MenB), clonal complex 32 (cc 32), was the Brazilian epidemic strain of meningococcal disease (MD) in the 1990’s. Currently, meningococcus serogroup C (MenC), cc 103, is responsible for most of the cases of the disease in Brazil. The aim of this study was to investigate the seroprevalence of bactericidal antibody (SBA) against rep
Braz J Med Biol Res. Publicado em: 20/04/2017
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12. A New Post-Metallocene-Ti Catalyst with Maltolate Bidentade Ligand: an Investigation in Heterogeneous Polymerization Reactions in Different Mesoporous Supports
A new titanium catalyst easily synthesized from ethylmaltol bidentate chelator ligand was studied in homogeneous and heterogeneous ethylene polymerization. The dichlorobis(3-hydroxy-2-ethyl-4-pyrone)titanium(IV) complex was characterized by 1H and 13C NMR (nuclear magnetic resonance), UV-Vis and elemental analysis. Theoretical study by density functional the
J. Braz. Chem. Soc.. Publicado em: 2016-11