Experimental Film
Mostrando 13-24 de 204 artigos, teses e dissertações.
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13. Factors and mass ratio analyses for Reactive Blue 19 dye decolorization using ozone: an experimental and analytical modelling approach
RESUMO Os corantes reduzem significativamente a penetração da luz solar no corpo d’água e, consequentemente, afetam a fotossíntese e a transferência de oxigênio. Realizaram-se modelagens experimental e analítica da remoção do azul reativo 19 por ozônio. Para isso, avaliaram-se os atributos e a taxa mássica por ensaios em batelada. A eficiência
Eng. Sanit. Ambient.. Publicado em: 30/05/2019
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14. Application of Taguchi Method to Study Morphological Evolution of TiO2 Nanotubes Obtained Via Anodization Process
The growth of titanium dioxide nanotubes (TiO2) via anodization process depends on the controlling parameters such as applied potential, anodization time, and electrolyte composition. In the present work, the Taguchi method was applied to evaluate statistically the influence of the anodization parameters on the morphology of anodized TiO2 films. Mixture of e
Mat. Res.. Publicado em: 15/03/2018
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15. EXPERIMENTAL AND THEORETICAL ANALYSIS OF NA OXAZINOQUINOXALINE DERIVATIVE FOR CORROSION INHIBITION OF AISI 1018 STEEL
The inhibitory ability of an oxazinoquinoxaline derivative (OAQX) against the corrosion of AISI 1018 mild steel induced by aqueous 0.6 mol L-1 NaCl solution is herein evaluated. Linear polarization resistance studies showed the inhibitory efficiency of OAQX varying from 62.75% to 75.93% with OAQX concentration ranged from 0.259 x 10-4 mol L-1 to 3.243 x 10-4
Quím. Nova. Publicado em: 2018-03
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16. Produtividade da alface cultivada em sistema aquapônico sob diferentes substratos
RESUMO No sistema de aquaponia as características dos materiais utilizados como substrato afetam diretamente no desenvolvimento das plantas, pois além de atuarem como base de sustentação, devem apresentar uma superfície para fixação de microrganismos, responsáveis pela conversão de nutrientes para formas mais facilmente disponíveis para plantas. As
Rev. bras. eng. agríc. ambient.. Publicado em: 2018-01
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17. In situ effect of titanium tetrafluoride varnish on enamel demineralization
Abstract The effect of a 4% titanium tetrafluoride (TiF 4 ) varnish on enamel demineralization was evaluated. Twelve volunteers participated in this double-blind, randomized crossover study. Six enamel specimens were positioned in intraoral appliances throughout four treatment stages: 4% TiF 4 varnish (experimental varnish), 5% sodium fluoride (NaF) varnish
Braz. oral res.. Publicado em: 06/11/2017
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18. DESEMPENHO DO ELETRODO DE FILME DE PALÁDIO NA DETERMINAÇÃO DE TÁLIO E CHUMBO EM AMOSTRAS DE ÁGUAS NATURAIS POR VOLTAMETRIA DE REDISSOLUÇÃO ANÓDICA COM PULSO DIFERENCIAL
The use of a palladium film electrode (PdFE) as an alternative electrode for the determination of thallium (Tl+) and lead (Pb2+) in water samples by anodic stripping voltammetry is proposed. Preliminary studies of the influence of the substrate were performed on the electrochemical behavior of PdFE prepared ex situ. Using a silver solid amalgam electrode as
Quím. Nova. Publicado em: 2017-09
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19. Extraction and properties of starches from the non-traditional vegetables Yam and Taro
Abstract The objective of this study was to assess the chemical, physical, morphological, crystalline and thermal properties of starch from two non-traditional vegetables, yam and taro. The analyses included proximate composition percent, amylose and mineral content, water absorption capacity, absolute density, morphological properties, X-ray diffractometry,
Polímeros. Publicado em: 29/06/2017
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20. Determination of Film Thickness Through Simulation of Vickers Hardness Testing
In recent decades, changes in the surface properties of materials have been used to improve their tribology characteristics. However, this improvement depends on the process, treatment time and, essentially, the thickness of this surface film layer. Physical vapor deposition (PVD) has been used to increase the surface hardness of metallic materials. The aim
Mat. Res.. Publicado em: 13/04/2017
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21. Study of the Nanostructure Effect on Polyalkylthiophene Derivatives Films Using Impedance Spectroscopy
In this paper, devices fabricated with a diode-like structure (electrode/polymer/electrode) from spin-coated and nanostructured (Langmuir-Schaefer) films of polythiophene derivatives were characterized by impedance spectroscopy and studied by theoretical fitting to reach a better understanding of the physical processes in the devices. The materials used for
Mat. Res.. Publicado em: 20/03/2017
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22. Incorporation of N in the TiO2 Lattice Versus Oxidation of TiN: Influence of the Deposition Method on the Energy Gap of N-Doped TiO2 Deposited by Reactive Magnetron Sputtering
N-doped TiO2 can be deposited by reactive magnetron sputtering by two methods: incorporation of nitrogen particles in the TiO2 lattice or incorporation of oxygen particles in the TiN lattice (oxidation). This paper investigates both procedures by experimental and numerical methods in order to establish the best way for incorporation of substitutional nitroge
Mat. Res.. Publicado em: 02/03/2017
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23. Nanocomposites films obtained from protein isolates of mechanically deboned chicken meat added with montmorillonite
Abstract The aim of this study was to evaluate the properties of nanocomposite films of protein isolates from mechanically deboned chicken meat with organoclay (montmorillonite). For the film development, a 23 experimental design was performed with three levels, protein isolate (2, 3.5, 5 g.100 mL-1 of solution), montmorillonite (0.3, 0.5, 0.7 g.100mL-1 of s
Polímeros. Publicado em: 2017-03
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24. Ibuprofen, Carbamazepine and β-Estradiol Determination Using Thin-Film Microextraction and Gas Chromatography-Mass Spectrometry
The use of thin-film microextraction for the extraction of selected pharmaceutical compounds followed by gas chromatography-mass spectrometry detection was evaluated. A segment of polysiloxanes polymer sheet was used as low cost, single use, disposable extraction phase, while Milli-Q water spiked at 20 µg L−1 with the analytes was used for the optimizatio
J. Braz. Chem. Soc.. Publicado em: 2016-10