Accelerated Techniques
Mostrando 1-12 de 60 artigos, teses e dissertações.
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1. Growth dynamics of container seedlings of Eucalyptus grandis x Eucalyptus urophylla and Hymenaea courbaril L.
ABSTRACT Growth analysis (GA) is used to quantify plant development based on morphophysiological changes. GA is a practical tool to evaluate nursery techniques to make them more efficient. The objective of this essay was to quantity measure morphophysiological growth variables of Eucalyptus grandis x Eucalyptus urophylla and Hymenaea courbaril (jatoba) conta
Revista Ceres. Publicado em: 2022
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2. Ouvindo silêncios: Daniel Hogan, o mundo rural e a natureza
Resumo A produção e as atitudes de Daniel Hogan (1942-2010) permanecem fundamentais para compreender as relações entre população e ambiente no rural brasileiro, especialmente no que diz respeito às grandes migrações, à urbanização acelerada e seus efeitos sobre o meio. Essas contribuições aparecem em estudos que pesquisaram silêncios – grand
Rev. bras. estud. popul.. Publicado em: 03/06/2019
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3. Effect of Hot Deformation on Microstructure, Hardness and Precipitation Kinetics in a C350 Maraging Steel Modified by Titanium Addition
Maraging steels are alloys with a good balance between strength and fracture toughness. These properties are obtained by quenching and aging treatments, where the precipitation of intermetallic compounds is promoted in a martensitic matrix. In this context, this paper aims to evaluate the effect of hot deformation on microstructure, kinetics and formation of
Mat. Res.. Publicado em: 17/09/2018
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4. INFLUÊNCIA DO ENVELHECIMENTO ACELERADO EM FLARES MAGNÉSIO/PTFE/FPM
Magnesium/PTFE/FPM decoy flares, also named conventional flares, were designed in order to protect combat aircraft from the threat caused by infrared-guided missiles. Adverse storage or transport conditions may cause reactions that deteriorates chemical properties of the conventional flares, causing the aging and compromising its performance. The aim of this
Quím. Nova. Publicado em: 2017-09
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5. A New Dynamic Powder Consolidation Technique Using Shock Waves
Techniques for shock consolidation of powders have been developed for different purposes, including the synthesis of diamond from carbon powder. In this work, a new device configuration for dynamic consolidation is proposed. It consists of three coaxial tubes, with a conical cover made of explosive at the top of the device. The inner tube contains the powder
Mat. Res.. Publicado em: 13/07/2017
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6. Visualisation of the Galvanic Effects at Welds on Carbon Steel
Non-destructive classical techniques, such as electrochemical impedance spectroscopy (EIS) and open circuit potential (OCP) measurement, were complemented with advanced techniques, including the scanning vibrating electrode technique (SVET) and localised electrochemical impedance spectroscopy (LEIS) to examine galvanic effects at welds on carbon steel. The c
J. Braz. Chem. Soc.. Publicado em: 2015-04
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7. Avaliação de território e coremática. Aplicação ao município de São Paulo / Evaluation of territory and coremática. Application to São Paulo City
In a period where the changes occur at an accelerated way, operating a growing number of actors and the general processes that directly or indirectly reflect the local dynamics, we need to find analytical tools that can assist in understanding these changes. Even though global events strongly influence the location, increasingly smaller scales have greater r
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/09/2012
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8. Rapid validated HPTLC method for estimation of piperine and piperlongumine in root of Piper longum extract and its commercial formulation
Piperine and piperlongumine, alkaloids having diverse biological activities, commonly occur in roots of Piper longum L., Piperaceae, which have high commercial, economical and medicinal value. In present study, rapid, validated HPTLC method has been established for the determination of piperine and piperlongumine in methanolic root extract and its commercial
Rev. bras. farmacogn.. Publicado em: 20/09/2012
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9. Avaliação da atividade antioxidante dos ácidos caféico e ferúlico no controle da estabilidade oxidativa do biodiesel de soja. / Evaluation of antioxidant activity of caffeic and ferulic acids in controlling the oxidative stability of biodiesel from soybean.
A oxidação lipídica é um fator crítico na perda da qualidade do biodiesel, em particular do biodiesel de soja, pois a sua composição em ésteres favorece o desenvolvimento da degradação oxidativa, devido à quantidade em ésteres de ácidos graxos insaturados tais como, oleato, linoleato e linolenato de etila. Neste trabalho, técnicas aceleradas (r
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2011
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10. Estudo da distribuição de tensões e da resistência à tração de interfaces adesivas dentina-resina de duas formas de espécimes submetidos a diferentes protocolos de envelhecimento acelerado / Study of stress distribution and tensile bond strength of dentin-resin adhesive interfaces of two types of specimens submitted to different protocols of accelerated aging
The rapid and frequent development of new materials and restorative techniques necessitate rapid assessments to estimate their clinical outcomes. This study sought to evaluate protocols for accelerated aging, in vitro, capable of simulating the performance of adhesive restorations with challenges inherent to the oral environment. The study included 36 molars
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/07/2011
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11. Predição em modelos de tempo de falha acelerado com efeito aleatório para avaliação de riscos de falha em poços petrolíferos
We considered prediction techniques based on models of accelerated failure time with random eects for correlated survival data. Besides the bayesian approach through empirical Bayes estimator, we also discussed about the use of a classical predictor, the Empirical Best Linear Unbiased Predictor (EBLUP). In order to illustrate the use of these predictors, we
Publicado em: 2010
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12. Cardanol e Eugenol Modificados Uso Como Antioxidante no Controle do Processo Oxidativo do Biodiesel de Algodão / Modified Cardanol and Eugenol Using as Antioxidant on the control of the Oxidative Process in Cotton Biodiesel
Biodiesel is composed by a mixture of different kinds of esters that may have unsaturations in their chains. These unsaturations are susceptible to oxidation processes, especially in the presence of oxygen. The oxidative stability of biodiesel becomes therefore an important quality parameter since the oxidation of the esters may cause some problems when usin
Publicado em: 2010