Partial Characterization
Mostrando 1-12 de 1440 artigos, teses e dissertações.
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1. 1H NMR and Chemometric Methods to Estimate the Octane Number in Brazilian C Gasolines
Brazilian gasoline type C can be purchased with octane number as the main difference. This quality parameter directly affects the price. Intermediate formulations may not be easily distinguished from conform samples due to similarity in visual appearance and physicochemical properties. The use of anhydrous ethanol as an additive also influences the octane va
J. Braz. Chem. Soc.. Publicado em: 2020-08
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2. Study of the Effect of Inhibitors Solutions on the Chemical Composition of Waxes by Rheology Tests and High Resolution Mass Spectrometry
Wax deposit is of a great concern in the petroleum industry and causes partial or total blockage of the pipelines. In this work, four Brazilian crude oils (P1-P4) and five inhibitors solutions (I1-I5) were used associating rheology results to understand, at a molecular level, the characteristics of the saturated fractions by high-resolution mass spectrometry
J. Braz. Chem. Soc.. Publicado em: 2020-04
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3. Evaluation of the Influence of the Substituting Cation on the Structural and Morphological Properties of the New Garnet Sm3−xREExFe5O12 (REE = Dy, Gd and Lu)
Rare earth garnets (REE3Fe5O12) have magnetic-electric and optical properties that can be used in transmitters, microwave and data storage devices. These properties depend mainly on partial or total substitution of the cationic sites, as well as by the synthesis method used. Therefore, in this work was studied the influence of the substituting cation on the
Mat. Res.. Publicado em: 20/01/2020
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4. Disponibilidade hídrica e fertilização mineral nas características da madeira e do carvão vegetal de Eucalyptus grandis W. Hill ex Maiden
Resumo As alterações na qualidade da madeira das árvores de Eucalyptus causadas pela fertilização e disponibilidade hídrica podem influenciar as características da biomassa e do carvão vegetal. O objetivo deste trabalho foi avaliar as características da madeira e do carvão vegetal de Eucalyptus grandis sob o efeito da fertilização com potássio e
Ciênc. Florest.. Publicado em: 02/12/2019
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5. Molecular characterization and genetic relationships of seven piranha species of the genera Serrasalmus and Pygocentrus (Characiformes: Serrasalmidae) from Paraná-Paraguay, São Francisco and Tocantins River basins in Brazil
Resumo Relações genéticas e filogenéticas de sete espécies de piranhas dos gêneros Serrasalmus e Pygocentrus das bacias hidrográficas Paraná-Paraguai, São Francisco e Tocantins foram avaliadas com base em sequências parciais dos genes mitocondriais Citocromo b e Citocromo c Oxidase I. Foram realizadas análises filogenéticas de Máxima Verossimilh
Braz. J. Biol.. Publicado em: 25/11/2019
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6. Partial characterization of ethanolic extract of Melipona beecheii propolis and in vitro evaluation of its antifungal activity
ABSTRACT The ethanolic extract of Melipona beecheii Bennett 1831, propolis from Yucatán Mexico was evaluated in vitro for the determination of its phenolic compound content, antioxidant capacity and antifungal activity. The results were compared against those of the ethanolic extract of Apis mellifera propolis. The total phenolic content, flavonoid content
Rev. bras. farmacogn.. Publicado em: 26/08/2019
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7. Waste tires and the burning of sugarcane bagasse in the manufacture of concrete pavers (pavers)
Resumo A pesquisa desenvolvida tem como proposta analisar a potencialidade de utilização da cinza do bagaço da cana-de-açúcar e do resíduo de pneus na confecção de blocos de concreto para pavimentação (pavers) em substituição do agregado miúdo, a areia natural. Para atingir este objetivo a metodologia adotada compreende etapas como: a caracteriz
Rev. IBRACON Estrut. Mater.. Publicado em: 18/07/2019
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8. Identification of two species of Binema Travassos 1925 (Oxyurida: Travassosinematidae) and Cameronia arecoensis Marchissio and Miralles 1987 (Oxyurida: Thelastomatidae) based on morphological and 18S rRNA partial sequence
Abstract: Oxyurid nematodes parasitizing the mole cricket Neoscapteriscus vicinus were isolated in the framework of sampling fields of mole-crickets from the pampean region, in Argentina. In this work, molecular characterization of the 18S rRNA partial sequence of nematodes belonging to the families Thelastomatidae (Cameronia arecoensis Marchissio and Mirall
An. Acad. Bras. Ciênc.. Publicado em: 19/06/2019
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9. CHARACTERIZATION OF SEVERAL GENERATIONS OF NiMo HYDROPROCESSING CATALYSTS EMPLOYED IN THE SAME HYDROTREATER
This work details the chemical characterization of four NiMo/Al2O3 hydroprocessing generation catalysts (1979-1986, 1993-1998, 2003-2008 and 2008-2011) employed to perform hydrodesulfurization (HDS) of diesel fractions in the same hydrotreater of a Brazilian refinery. The basic differences are the quality of the feedstocks and the HDS experimental conditions
Quím. Nova. Publicado em: 27/05/2019
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10. Molecular characterization of virulence genes cctA, nanA, and fliC in Clostridium chauvoei from Rio Grande do Sul and São Paulo State, Brazil
RESUMO: Toxina A de Clostridium chauvoei (CctA), neuraminidase (NanA) e flagelina (FliC) são proteínas que contribuem para a patogenicidade de Clostridium chauvoei, o agente causador do carbúnculo sintomático em bovinos. O objetivo deste estudo foi analisar a variabilidade genética dos genes cctA, nanA, e fliC em C. chauvoei isolados em diferentes per�
Cienc. Rural. Publicado em: 02/05/2019
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11. Functional and biological insights of rCollinein-1, a recombinant serine protease from Crotalus durissus collilineatus
ABSTRACT Background: The prevalent class of snake venom serine proteases (SVSP) in Viperidae venoms is the thrombin-like enzymes, which, similarly to human thrombin, convert fibrinogen into insoluble fibrin monomers. However, thrombin-like serine proteases differ from thrombin by being unable to activate factor XIII, thus leading to the formation of loose c
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 08/04/2019
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12. Perfil e reabilitação fonoaudiológica de pacientes com câncer de laringe
RESUMO Objetivo descrever o perfil clínico e sociodemográfico e o desfecho da reabilitação fonoaudiológica de pacientes com câncer de laringe. Método estudo transversal com 204 pessoas atendidas entre 1989 e 2015. A associação entre desfecho da fonoterapia e variáveis de caracterização sociodemográfica e clínicas foi verificada por técnica
CoDAS. Publicado em: 07/03/2019