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Mostrando 1-12 de 135 artigos, teses e dissertações.
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1. Effects of Soil and Vineyard Characteristics on Volatile, Phenolic Composition and Sensory Profile of Cabernet Sauvignon Wines of Campanha Gaúcha
The influence of vineyard on wines was evaluated for the first time using a broader analytical approach: sensory analyses and several analytical techniques (gas chromatography-mass spectrometry (GC-MS), GC flame ionization detection (FID), GC-olfactometry-Osme technique (GC-O-Osme), GC × GC-MS), taking into account odoriferous compounds of Cabernet Sauvigno
J. Braz. Chem. Soc.. Publicado em: 2020-06
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2. Electrolytic polishing of compacted graphite iron for revealing subsurface graphite of honed cylinders
ABSTRACT The superficial characteristics of honed surfaces are relevant for the tribological performance of cylinders of internal combustion engines (MCI). Recent studies found a correlation between the occurrence of the phenomenon called folded metal and the presence of graphite of cast irons. However, the honing process tends to overlap the graphite, such
Matéria (Rio J.). Publicado em: 20/05/2019
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3. Experiências com as leituras de João Gilberto Noll
Resumo O presente texto está pautado por uma espécie de profanação do artigo acadêmico. A partir de uma explícita exposição da subjetividade e da confessionalidade, orquestra-se um ensaio-experimento (ensaio-experiência), marcado pela fusão entre escrita criativa e teoria literária. Ao recorrer ao texto dramático, busco registrar dialogicamente q
Estud. Lit. Bras. Contemp.. Publicado em: 20/05/2019
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4. DLLME-GC/ECD Method for the Residual Analysis of Parathion-Methyl and its Application in the Study of the UV-Photodegradation Process
A new method has been developed to determine trace levels of organophosphorus pesticide parathion-methyl in water samples by using dispersive liquid-liquid microextraction (DLLME), followed by gas chromatograph coupled with electron capture detector (GC/ECD) analysis. The optimized and validated method showed high extraction recovery (101.1%), high enrichmen
J. Braz. Chem. Soc.. Publicado em: 2017-11
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5. Structural Characterization of ZnTe Grown by Atomic-Layer-Deposition Regime on GaAs and GaSb (100) Oriented Substrates
This work presents the characterization of ZnTe nanolayers grown on GaAs and GaSb (100) substrates by the Atomic Layer Deposition (ALD) regime. Under certain conditions, the alternating exposition of a substrate surface to the element vapours makes possible the growth of atomic layers in a reactor where the atmosphere is high-purity hydrogen. ZnTe was grown
Mat. Res.. Publicado em: 23/03/2017
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6. Complete supine PCNL: ultrasound vs. fluoroscopic guided: a randomized clinical trial
ABSTRACT Introduction and Hypothesis: To compare complications and outcomes of complete supine percutaneous nephrolithotomy (csPCNL) with ultrasound guided and fluoroscopically guided procedure. Materials and Methods: In this randomized clinical trial study from January 2009 to September 2010, 26 of 51 patients with renal stones underwent csPCNL with ultra
Int. braz j urol.. Publicado em: 2016-08
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7. Comportamiento Tribológico y Microestructural en Recubrimientos Aplicados por GTAW y HVOF (Proceso Térmico de Espreado) y Usado en Recuperación de Aceros Grado Herramienta AISI/SAE D2
Abstract The Fe-Cr-Mo alloys are use in covers to protect the components that are under wear and corrosion. The high velocity thermo spray covering by HVOF (high velocity oxi-fuel) in Fe-Cr-Mo alloys has reported as a good result in projection fields for the steel tool grade for cold work. The HOVF is an attractive method to apply covering and recuperate dia
Soldag. insp.. Publicado em: 2016-06
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8. El efecto Hall cuántico y sus contextos
In this paper we address several conceptual and historical aspects of the quantum Hall effect. We argue that this effect offers a variety of perspectives for philosophical reflection, from the generation of theoretical entities to the epistemology of experimentation. The exposition attempts to maintain a certain sensitivity to the historical dynamics around
Sci. stud.. Publicado em: 2013-03
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9. Desinfestação e estabelecimento in vitro de segmentos caulinares de camu-camuzeiro / Disinfestation and in vitro establishment of stem segments of camu-camu tree
The camu-camu tree (Myrciaria dubia (H.B.K.) McVaugh) is a fruit-bearing species belonging to the family Myrtaceae of spontaneous occurrence on the banks of rivers and lakes of Amazonia. It presents economic potential, since its fruits are thought the greatest natural source of vitamin C, bordering 6,112g of ascorbic acid per 100 g of pulp, arising commercia
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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10. Indução do sistema citocromo P450 em linhagens de hepatoma humano para utilização como modelo in vitro no desenvolvimento de fármacos / Induction of cytochrome P450 system in human hepatoma cell lines for using as in vitro model in drug development
In the early development stage of the new drugs, the pharmacological and toxicological properties are critical to define the potential use of the candidate drug. During this stage, several in vitro models systems are employed, including human hepatoma cell lines. However, the main limitation of the use of cell lines as in vitro model is the low expression le
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/01/2012
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11. Avaliação da eficácia da desinfecção de instrumentos usados durante o período transoperatório do tratamento endodôntico / Evaluation of the desinfection efficacy of instruments used during the transoperatory period in endodontic treatment
This investigation aimed to evaluate the antimicrobial efficacy of disinfectant agents used to maintain the disinfection of endodontic instruments during the transoperatory period in endodontic treatment. The antimicrobial activity of disinfectants isopropyl alcohol, acetone and peracetic acid were evaluated upon planktonic micro-organisms by time kill assay
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/01/2012
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12. Corrosion evaluation of orthodontic wires in artificial saliva solutions by using response surface methodology
In the present work, stainless steel and Ni-Ti commercial orthodontic wires were immersed in artificial saliva solutions, containing or not F- ions, in different pH values, during 30 days. The weight loss and the Ni2+ content in the solutions at 15 and 30 days of exposition were evaluated using a composite design 2³ and response surface methodology. The ope
Mat. Res.. Publicado em: 11/12/2012