Casting
Mostrando 13-24 de 570 artigos, teses e dissertações.
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13. EVALUATION OF POLY(VINYL ALCOHOL) ADDITION EFFECT ON NANOFIBRILLATED CELLULOSE FILMS CHARACTERISTICS
ABSTRACT In this study, based on the mechanical shear treatment, the cellulosic pulp was fibrillated in nanofibrils dispersed in aqueous suspension. Nanofibrillated Cellulose (NFC) matrix - Polyvinyl Alcohol (PVA) nanocomposite films’ were prepared by casting from NFC/PVA suspension mixtures. The thermal and mechanical properties of the obtained films were
CERNE. Publicado em: 2020-03
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14. Chemically Reduced Graphene Oxide on Gold Electrodes from Recordable CDs: Characterization and Potential Sensing Applications
This work presents the development and characterization of a new chemically modified electrode exploiting recordable Au-rewritable compact discs (AuCDs) as substrate for drop casting of a chemically-reduced graphene-oxide slurry focusing on simple and low-cost electrochemical sensors. Increase in electrochemical responses in cyclic voltammetric and amperomet
J. Braz. Chem. Soc.. Publicado em: 2020-03
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15. Polymicrobial Leakage and Retention of MTA and Portland Cement in a Model of Apexification
Abstract Objective: To evaluate the sealing capacity and retention of apical barriers made with mineral trioxide aggregate (MTA) and Portland cement (PC). Material and Methods: Fifty-six bovine incisors were sectioned 8 mm above and 12 mm below the cement-enamel junction. The root canal was enlarged with a diamond drill to create a standard 2.5 mm diameter
Pesqui. Bras. Odontopediatria Clín. Integr.. Publicado em: 13/01/2020
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16. Glass Formation of Null-Matrix Cu-Hf-(Zr, Ti) Alloys
An approach following the null-matrix, Ti/Zr ratio of 2.08, for neutron diffraction was used to calculate the glass formation in Cu-Ti-(Hf,Zr) alloys. The Cu55Zr14.6Ti30.4, Cu61.48Hf18.52Zr6.48Ti13.52, Cu58.1Hf16.9Zr8.1Ti16.9 and Cu52.46Hf14.2Zr10.8Ti22.54 compositions (at. %), were calculated and prepared by argon arc melting. Copper die suction casting was
Mat. Res.. Publicado em: 13/01/2020
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17. Fish news: perceptual skills, technique and distributed cognition in mullet fishing
Resumo Apresenta-se uma investigação sobre percepção, técnica, e cognição distribuída envolvendo coletivos de pescadores e peixes durante temporadas de pesca da tainha, no litoral de Santa Catarina, sul do Brasil. Discute-se o engajamento das técnicas de pesquisa, envolvendo a produção de imagens e sons, com as técnicas corporais e cadeias operat
Vibrant, Virtual Braz. Anthr.. Publicado em: 28/11/2019
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18. Single-Walled Carbon Nanotubes/Poly Vinyl Chloride Nanocomposites and its Properties
ABSTRACT The SWNTs was purified/functionalized by acid treatment method and the F-SWNTs were used as reinforcing materials. The acid treatment introduced carboxyl (–COOH) group to the SWNTs. The PVC and F-SWNTs/PVC films were prepared by solution casting method. The fractured surfaces of sample was analyzed through SEM and showed the dispersion of F-SWNTs
Matéria (Rio J.). Publicado em: 25/11/2019
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19. Characterization and application of ceramic membranes prepared from Algerian kaolin
Resumo Neste estudo, um novo tipo de membrana cerâmica foi usado para a filtração de água com cor. A membrana foi preparada a partir de caulim argelino KT2 do tipo Milia. A escolha desta matéria-prima foi ditada pela sua abundância natural, para formar o suporte macroporoso preparado pela técnica de colagem. Uma camada de película fina funcional (com
Cerâmica. Publicado em: 14/11/2019
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20. Intramedullary Flexible Nailing for Diaphyseal Fractures of Forearm Bones in Children
Resumo Objetivos A maioria das fraturas dos ossos do antebraço em crianças é tratada com sucesso de forma conservadora com redução fechada e imobilização gessada. No entanto, alguns pacientes podem necessitar de manipulação adicional da fratura ou intervenção cirúrgica devido a angulações residuais. O presente estudo avalia o resultado clinico
Rev. bras. ortop.. Publicado em: 14/11/2019
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21. Assessment of concrete anisotropy by means of compression and indirect tensile tests
Resumo Na análise e projeto estrutural de concreto armado, normalmente se assume que o material é isotrópico e homogêneo. As caraterísticas pontuais das estrutura, geralmente exercem pouca influência no comportamento das mesmas, portanto normalmente são desconsideradas. No entanto, existem muitas evidencias de que, na mesoescala, o concreto convencion
Rev. IBRACON Estrut. Mater.. Publicado em: 11/11/2019
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22. Influence of Composition on Mechanical Properties of Cassava Starch, Sisal Fiber and Carnauba Wax Biocomposites
Concern for sustainable development has provided significant improvements in the development of biodegradable materials. This work aims to evaluate, through a central composite design (CCD), the mechanical properties of cassava starch-based biocomposites manufactured with different compositions of carnauba wax (CW), sisal fiber (SF) and glycerol (G). The bio
Mat. Res.. Publicado em: 24/10/2019
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23. Dimensional Stability of Casts Derived from Three Types of Alginate at Different Times After Impression
Abstract Objective: To evaluate the dimensional changes in three types of alginate following three different delay times after casting. Material and Methods: In this laboratory study, a maxillary arch-shaped stainless steel model was prepared and three pins with similar and determined diameters and heights were placed (one at mid-line and two on the unders
Pesqui. Bras. Odontopediatria Clín. Integr.. Publicado em: 10/10/2019
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24. Silver nanoparticles incorporated PVC films: evaluation of structural, thermal, dielectric and catalytic properties
Abstract In this work, silver nanoparticle – polyvinylchloride (SNC-PVC) composites were synthesized by loading 2.5% to 10.0% silver ions to PVC using simple solution casting technique. Material properties including dielectric, thermal stability were discussed in some detail. Incorporation of silver nanoparticles (SNPs) in the PVC matrix was confirmed by U
Polímeros. Publicado em: 03/10/2019