Multi Reference
Mostrando 1-12 de 103 artigos, teses e dissertações.
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1. Development of Analytical Method for Determination of Inorganic Constituents in Powder Refreshment Using Dilute Mineral Acids and Detection by ICP OES
An analytical method for multi-elementary determination in powder refreshment, based on sample digestion using dilute mineral acids and detection by inductively plasma coupled optical emission spectrometry (ICP OES) is proposed. Chemometric tools, such as fractional factorial design and principal component analysis (PCA) and hierarchical cluster analysis (HC
J. Braz. Chem. Soc.. Publicado em: 2021-07
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2. SEQUENTIAL MULTI-ELEMENT DETERMINATION OF TRACE-METALS IN BIODIESEL SAMPLES USING HR-CS FAAS
In this work the feasibility of sequential multi-element determination of Zn, Fe, Mg, Cu, Na, K, Cr, Al and Ca in biodiesel samples by high-resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS) was investigated. Biodiesel samples obtained from different sources and different chemical processes were analysed. The samples were diluted w
Quím. Nova. Publicado em: 2021-02
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3. Phylogenetic placement of Tritirachium strains from the URM culture collection originally founded by Augusto Chaves Batista (1916-1967) in Brazil, and the description of T. batistae sp. nov.
ABSTRACT Twenty-seven Tritirachium strains were present in the URM culture collection originally founded in Brazil by Augusto Chaves Batista. Fifteen freshly-prepared cultures were obtained from these original strains preserved under mineral oil. DNA was extracted for analysing phylogenetic relationships using the sequence information available from Tritirac
Acta Bot. Bras.. Publicado em: 2020-06
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4. Multi-Energy Calibration: A Practical Method for Determination of Macro and Micro Nutrients in Meat by ICP OES
The multi-energy calibration (MEC) was evaluated for the determination of Ca, Cu, Fe, K, Mg, Na, P, S, and Zn in meat samples by inductively coupled plasma optical spectrometry (ICP OES). This calibration method consists of using only two calibration standards and several atomic and ionic emission wavelengths with different sensitivities to determine the ana
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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5. Fatores associados à depressão em homens e mulheres presos
RESUMO: Introdução: As prevalências de depressão em presídios são altas, porém não há clareza sobre os fatores de risco entre os sexos. Analisamos os fatores associados à depressão entre homens e mulheres presos no estado de São Paulo. Metodologia: Estudo transversal, de 2006 a 2007, com amostra probabilística estratificada e em múltiplos e
Rev. bras. epidemiol.. Publicado em: 23/09/2019
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6. Modelo conceitual para avaliação da infraestrutura escolar no ensino fundamental
Resumo: Apresenta um modelo conceitual para avaliar a infraestrutura escolar no ensino fundamental, tendo como referência os marcos legais e baseando-se na literatura nacional e internacional sobre o tema. A garantia da infraestrutura escolar com padrões mínimos de qualidade está presente no ordenamento legal do País, mas permanece como um desafio para
Rev. Bras. Estud. Pedagog.. Publicado em: 12/09/2019
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7. Investigation of resistance of Salmonella spp. isolated from products and raw material of animal origin (swine and poultry)to antibiotics and disinfectants
RESUMO O gênero Salmonella spp. Possui distribuição geográfica mundial constituindo-se como potencial risco para a saúde animal e saúde humana. O uso inadequado bem como a exposição continuada aos antibióticos e aos desinfetantes pode resultar no surgimento de resistência desses microrganismos frente aos compostos antimicrobianos. Os objetivos do t
Rev. bras. saúde prod. anim.. Publicado em: 01/07/2019
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8. Multi-walled carbon nanotube reinforced polymer as a bonded repair for Al 2024-T3 fatigue crack growth
ABSTRACT The influence on multi walled carbon nanotubes (MWCNT, or simply CNT) as a reinforcement material in an epoxy resin in order to decrease the fatigue crack propagation rate in the 2024 T3 aeronautical Al alloy was studied. CT samples were pre-cracked in a resonant fatigue machine until a 4 mm pre-crack length. Four groups of samples were considered:
Matéria (Rio J.). Publicado em: 06/12/2018
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9. A review of required features for a disaster response system on top of a multi-criteria decision: a Brazilian perspective
Abstract Paper aims The purpose of this paper is to analyze the current Brazilian Integrated Disaster Information System (S2iD), designed to qualify and give transparency to the disaster management in Brazil. Originality Providing an analysis of the system features and its prioritization, this paper can also serve as a reference for implementing software
Prod.. Publicado em: 02/07/2018
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10. REFERENCE EVAPOTRANSPIRATION FORECASTING BY ARTIFICIAL NEURAL NETWORKS
ABSTRACT: Evapotranspiration (ET) is the main component of water balance in agricultural systems and the most active variable of the hydrological cycle. In the literature, few studies have used the forecast the day before via Artificial Neural Networks (ANNs) for the northern region of São Paulo state, Brazil. Therefore, this aimed to predict the reference
Eng. Agríc.. Publicado em: 2017-12
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11. Survey of mycotoxins in Southern Brazilian wheat and evaluation of immunoassay methods
ABSTRACT One hundred commercial wheat grain samples were collected during the 2015 sea-son across 78 municipalities in the states of Paraná (PR), Rio Grande do Sul (RS), and São Paulo (SP), Brazil. Separate subsamples were analyzed for the concentration of deoxynivalenol (DON), zearalenona (ZEA) and ochratoxin A (OTA) mycotoxins using two methods: UHPLC-MS
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-08
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12. A Multi-Pumping Flow System with Pulsed Fluidization to Evaluate Soil Capacity for Phosphate Adsorption
Soils with high levels of iron and aluminum, thus negatively the phosphorous availability, affecting crop yields. A prior determination of the soil capacity to adsorb phosphate is relevant to attaining good agricultural performance. To this end, a multi-pumping flow system with pulsed fluidization is proposed. The procedure takes into account the amount of r
J. Braz. Chem. Soc.. Publicado em: 2017-07