Decomposition Method
Mostrando 1-12 de 287 artigos, teses e dissertações.
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1. Thermostimulated crystal structure transformation of the polymineral clay submicron particles
Abstract Changes in the structure of phyllosilicate microparticles of submicron fractions of polymineral clay with an average size of 290 nm, as well as changes in the positions of impurity ions of transition metals in the crystal lattice, were studied by X-ray diffraction analysis, Fourier transform infrared spectroscopy, and high-resolution electron parama
Cerâmica. Publicado em: 2022
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2. CLOROFILA EXTRAÍDA DE RESÍDUO INDUSTRIAL DA ERVA-MATE (Ilex paraguaiensis) UMA POSSIBILIDADE DE ECONOMIA CIRCULAR
Chlorophyll is the most abundant green pigment on the planet, it is unstable and decomposes naturally. Mate-herb is a traditional native plant in the southern region of South America, and its tea is part of the local culture and extractive agriculture. The mate-herb industry generates as a by-product a resinous material rich in chlorophyll whose use is propo
Química Nova. Publicado em: 2022
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3. Adaptability and stability of maize genotypes in growing regions of central Brazil
ABSTRACT This study aimed to estimate and compare parameters of adaptability and stability for maize grain yield in a variety of environments by different projection methods. Data from experiments on 36 maize genotypes, in simple lattice 6x6, in 2012/13 season performed at nine growing locations in central Brazil were used. Adaptability and stability analyse
Rev. Ceres. Publicado em: 2021-06
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4. Effect of pH level and calcination on the production of calcium phosphates by acidic route of wet precipitation
Abstract Multiphasic calcium phosphate powders were synthesized by the acidic route, using lactic acid as a chelating agent that allows the production of a stable and rich solution of calcium and phosphate ions at room temperature. After pH adjusting, without varying the concentrations of precursor solution, XRD and FTIR analyses showed different CaP phases
Cerâmica. Publicado em: 2021-06
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5. EFFECT OF WAVELET DE-NOISING ON THE CLASSIFICATION OF PIG BEHAVIOUR
ABSTRACT To efficiently eliminate the noise generated by the triaxial accelerometer when collecting pigs’ behavioural data, this paper adopted SNR and MSE as the indexes to evaluate the de-noising effect of pigs’ acceleration signal under various combinations of wavelet basis, decomposition layer, threshold rule and threshold function. Based on the optim
Eng. Agríc.. Publicado em: 2021-05
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6. Economic inequality in prevalence of underweight and short stature in children and adolescents: the weight disorders survey of the CASPIAN-IV study
ABSTRACT Objective: The aim of this study was to determine the determinants of socio-economic inequality in the prevalence of short stature and underweight in Iranian children and adolescents. Subjects and methods: This cross-sectional nationwide study was conducted on 36,486 participants, aged 6-18 years. This school-based surveillance (CASPIAN- IV) progr
Arch. Endocrinol. Metab.. Publicado em: 2020-10
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7. Kinetic parameters study for the slow pyrolysis of coffee residues based on thermogravimetric analysis
Thermal decomposition of coffee husks was investigated by thermogravimetric analyses. The proximate, ultimate and composition analyses were performed. Thermogravimetric tests were realized, the material was heated to 1173 K using five heating rates: 5, 10, 15, 20, 25 K min-1. The kinetic parameters were estimated using the methods of Kissinger-Akahira-Sunose
Quím. Nova. Publicado em: 2020-04
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8. Kinetics of Lumefantrine Thermal Decomposition Employing Isoconversional Models and Artificial Neural Network
Thermal analysis can be used to determine shelf-life and kinetic parameters in pharmaceutical systems. This work investigates the kinetic of lumefantrine thermal decomposition, an antimalarial, using non-isothermal and isothermal experimental data. The non-isothermal conditions are analyzed applying Vyazovkin method, while isothermal conditions employ models
J. Braz. Chem. Soc.. Publicado em: 2020-03
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9. Analysis of the agricultural productivity of the sugarcane crop in regions of new agricultural expansions of sugarcane
Resumo O lançamento dos veículos bicombustíveis, no ano de 2003, propiciou a retomada da importância da produção de etanol e, consequentemente, numa nova fase de expansão do cultivo de cana-de-açúcar no Brasil. Embora o aumento da área de produção e da quantidade produzida de cana-de-açúcar mereça destaque no agronegócio brasileiro, o mesmo
Gest. Prod.. Publicado em: 12/08/2019
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10. Concreto com borracha de recauchutagem de pneu para uso em pavimentação de baixo tráfego
RESUMO O aumento da demanda por veículos acarreta maior produção de novos pneus. No entanto, após o término de sua vida útil, eles se tornam um passivo ambiental de difícil descarte adequado, tanto pela demora em se decompor quanto por seu grande volume. Sua disposição inadequada causa grandes danos ao meio ambiente e favorece a proliferação de ve
Matéria (Rio J.). Publicado em: 10/06/2019
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11. Self-assembly modification of polyamide membrane by coating titanium dioxide nanoparticles for water treatment applications
Resumo O principal objetivo do presente estudo foi modificar a superfície de uma membrana de poliamida comercial com a deposição de nanopartículas de TiO2 pelo método self-assembly sob pressão com alta permeabilidade e atividade fotocatalítica. Mudanças nas características da membrana e seu desempenho nas propriedades fotocatalíticas foram avaliado
Rev. Ambient. Água. Publicado em: 20/05/2019
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12. Diferenciais de rendimento entre os setores de serviços e da indústria no Brasil: uma análise de decomposição
Resumo Este trabalho teve por objetivo analisar o diferencial de rendimentos entre os setores de serviços e da indústria no Brasil com base nas PNADs para os anos de 2004, 2009 e 2014. No primeiro momento, procurou-se analisar o hiato salarial entre os setores citados através da decomposição proposta por Oaxaca e Blinder, seguindo a análise através do
Econ. soc.. Publicado em: 29/04/2019