Specimen Preparation
Mostrando 1-12 de 101 artigos, teses e dissertações.
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1. Colorimetric analysis of dental porcelains: effects of the background color
Abstract This study evaluated how the background (white or gray) affects the color parameter measurements and color difference calculations (∆Eab and ∆E00) of dental ceramics. Disc-shaped feldspathic ceramic specimens were prepared with two shades (enamel and dentin) and stained in red wine (7-day immersion). A spectrophotometer was used to perform color
Cerâmica. Publicado em: 2022
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2. ESTUDO DESCRITIVO E MORFOMÉTRICO DO CRÂNIO DO Ramphastos toco (AVES: PICIFORMES)
Resumo O estudo de caracteres morfológicos e suas funções biomecânicas na estrutura craniana das aves levanta debates de cunho filogenético, taxonômico e morfofuncional. O objetivo deste trabalho foi descrever e analisar caracteres morfológicos e morfométricos do esqueleto do Ramphastos toco e confrontá-los com a bibliografia disponível. Foram anal
Ciênc. anim. bras.. Publicado em: 24/10/2019
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3. Impact of methods used to reconstitute tailings specimens on the liquefaction potential assessment of tailings dams
Abstract The aim of this research is to investigate the liquefaction susceptibility of silt sandy mining tailings by experimental laboratory techniques. The main aspect analyzed is how techniques of sample reconstitution impact the results obtained in static undrained triaxial tests. Different methods of sample preparation are reviewed, such as moist tamping
REM, Int. Eng. J.. Publicado em: 19/06/2019
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4. Resistência mecânica à adesão em superfícies de madeira de pinus aplainadas e unidas por adesivos PVAc
RESUMO Este trabalho teve como objetivo analisar o desempenho de juntas coladas de madeiras da espécie Pinus elliottii com a utilização de dois adesivos comerciais à base de poliacetato de vinila (PVAc), com diferentes características físicas e composição química, ambos testados nas formas diluída em água e não diluída. As superfícies dos corpo
Matéria (Rio J.). Publicado em: 20/05/2019
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5. Methods of biological maceration in the preparation of bat skulls: benefits and limitations
Abstract Osteologic collections are used as an aid to scientific and teaching activities, to provide information on specific vertebrate characteristics, such as body support, posture, mode of locomotion, feeding habits and ecological niche. Known techniques for cleaning entire skeletons or mammalian skulls vary according to the destination of the material, t
Pap. Avulsos Zool.. Publicado em: 22/10/2018
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6. Preparation and Ablation Performance of Lightweight Phenolic Composite Material under Oxyacetylene Torch Environment
ABSTRACT The present study investigates the influence of fiber content on thermal properties of short silica fiber (SSF) reinforced modified resole resin (MRR) composites. For this purpose, different SSF loading composites were prepared: 40, 55, and 65 wt.%. The ablation resistance related to mass loss parameters was quantified by testing under an oxyacetyle
J. Aerosp. Technol. Manag.. Publicado em: 21/06/2018
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7. Porosity Characterization of Iron Ore Pellets by X-Ray Microtomography
This work proposes a three-dimensional methodology to characterize porosity in iron ore pellets by X-ray Microtomography (microCT). An image analysis routine was developed to discriminate and quantify open/closed porosity. The results were compared to the traditional techniques of mercury intrusion porosimetry (MIP) and optical microscopy (OM). As expected,
Mat. Res.. Publicado em: 22/01/2018
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8. Influence of crosshead speed on failure load and failure mode of restored maxillary premolars
We analyzed the effect of the crosshead speed of an applied load on failure load and failure mode of restored human premolars. Fifty intact, noncarious human premolars were selected. Class II mesio-occlusodistal preparations were made with a water-cooled high-speed preparation machine, and the teeth were restored with composite resin. The specimens were divi
Braz. oral res.. Publicado em: 15/12/2015
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9. Shaping ability of Reciproc and TF Adaptive systems in severely curved canals of rapid microCT-based prototyping molar replicas
Objective: To evaluate the shaping ability of Reciproc and Twisted-File Adaptive systems in rapid prototyping replicas. Material and Methods: Two mandibular molars showing S-shaped and 62-degree curvatures in the mesial root were scanned by using a microcomputed tomography (μCT) system. The data were exported in the stereolitograhic format and 20 samples
J. Appl. Oral Sci.. Publicado em: 10/06/2014
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10. Designing of CK45 carbon steel and AISI 304 stainless steel dissimilar welds
Gas tungsten arc welding of CK45 and AISI304 stainless steel was performed through preparation of different types of samples using ER308L and ERNi-1 wires. Welded samples were studied by different techniques including optical metallography, scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEM-EDS), X-ray diffraction, hardness
Mat. Res.. Publicado em: 11/10/2013
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11. Discovery of a second geophilomorph species (Myriapoda: Chilopoda) having twenty-seven leg-bearing segments, the lowest number recorded up to the present in the centipede order Geophilomorpha
Schendylops ramirezi sp. nov. (Myriapoda: Chilopoda), a tiny schendylid centipede (from Rio de Janeiro State, Brazil), is hereby described and illustrated based on the female holotype, male and female paratypes, and additional non-type specimens. This discovery represents the second geophilomorph species characterized by having twenty-seven leg-bearing segme
Pap. Avulsos Zool. (São Paulo). Publicado em: 2013
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12. Experimental evaluation in dogs of importance of bowel preparation on colo-colonic anastomosis. / AvaliaÃÃo da anastomose colo-cÃlica com e sem preparo intestinal. Estudo experimental em cÃes
The objective of this study was to evaluate the efficacy of colo-colonic anastomosis in dogs with and without preoperative bowel preparation. The experiment included 42 healthy female mongrel dogs (Canis familiaris) weighing 8.4-16.9 Kg, supplied by the municipal dog pound of Teresina, PiauÃ. The animals were distributed at random in two groups of 21 animal
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/12/2012