Composed Resins
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. QUANTIFICAÇÃO DE CANABINOIDES EM EXTRATOS MEDICINAIS DE Cannabis POR CROMATOGRAFIA LÍQUIDA DE ALTA EFICIÊNCIA
Cannabidiol (CBD) and tetrahydrocannabinol (THC) are the main active principles in the Cannabis extracts. Rich-CBD extracts are indicated to control seizures in epileptic patients, THC is indicated as antiemetic to patients in chemotherapy treatment and extracts with THC and CBD in proportions of approximately 1:1 are indicated to control spasticity in patie
Quím. Nova. Publicado em: 2020-01
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2. Influencia de la temperatura en ensayos de arrancamiento sobre diferentes sistemas epoxi-acero de uso en conectores de ductos flexibles
ABSTRACT In the offshore oil fields located in deep and ultra-deep waters they are used flexible pipes. In many cases inside these pipes, the hydrocarbons are transported at elevated temperatures. At the ends of the flexible pipes are installed end fittings, these are the connection with sea platforms and different subsea systems. In the assembly of end fitt
Matéria (Rio J.). Publicado em: 19/07/2018
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3. CORRELAÇÕES GEOQUÍMICAS ENTRE AMOSTRAS DE PETRÓLEO DA BACIA POTIGUAR E DEFINIÇÃO DE SUAS POSSÍVEIS ROCHAS GERADORAS
Eight petroleum samples from Potiguar Basin were submitted for determination of saturated biomarkers by gas chromatography (fingerprint), liquid chromatography (saturates, aromatics, resins and asphaltenes), gas chromatography-mass spectrometry (GC-MS), nickel and vanadium by high resolution continuum source graphite furnace atomic absorption spectrometry (H
Quím. Nova. Publicado em: 2018-04
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4. Evaluation of Out-of-Autoclave (OOA) epoxy system
Abstract Epoxy resins (EP) usually cure in autoclave to minimize resin voids and to achieve the desired resin/fiber ratio. Cure parameters such as temperature, vacuum and pressure levels are controlled and monitored. Aiming time and cost optimization, new out-of-autoclave (OOA) cure processes have been developed lately. This study evaluated the cure cycle an
Polímeros. Publicado em: 2017-12
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5. Effect of the loading of organomodified clays on the thermal and mechanical properties of a model dental resin
Experimental dental resins composed of triethyleneglycol dimethacrylate, urethane dimethacrylate, ethoxylated bisphenol-A-dimethacrylate and bisphenol A glycidyl methacrylate containing an organoclay as filler were prepared by photopolymerization. The addition of organoclay fillers results in slower polymerization rates (0.59 and 0.24 mol L-1 min-1, for the
Mat. Res.. Publicado em: 05/02/2016
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6. Wear mechanisms of dental composite restorative materials by two different in-vitro methods
In this work two very simple apparatuses, namely the ball crater (or ball-on-plate) and the linear reciprocating (or pin-on-plate) tests, were used in order to investigate the wear mechanisms of TPH Spectrum® and Resilab Master® dental composite resins. Loads in the range of 100 g to 1 kg and a total number of up to 24000 cycles were employed. During some
Mat. Res.. Publicado em: 21/12/2012
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7. Recuperação de urânio de rejeito de mina por meio de lixiviação alcalina / Recovery of uranium from mine wastes by alkaline leaching
Appropriate management of wastes is one of the most important environmental problems, particularly concerning the tailings of mining activities. Interim storage of the tailings at incorrect places pending treatment demands an urgent solution. The Osamu Utsumi Mine located in the city of Caldas, Minas Gerais, has faced such problem. The waste of the mine cons
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2010
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8. Study of partition of ovomucoid protein in aqueous twophase systems and anionic or hydrophobic resins / Estudo da partição da proteína ovomucoide em sistemas aquosos bifásicos e em resinas aniônica ou hidrofóbica
In this work, the application of the liquid-liquid extraction technique with aqueous two-phase systems (ATPS) was evaluated for the separation of ovomucoid, an egg white protein. This technique is an advisable purification process applied to large scale since it provides a selective partition with high yields. The ATPS were composed by PEG 1500 and an inorga
Publicado em: 2009
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9. Shrinkage reduction in dental resins and composites by addition of polymeric crosslinked nanoparticles / Redução da contração de polimerização em resinas e compositos odontologicos pela adição de nanoparticulas polimericas reticuladas
Neste estudo foi avaliado o efeito da adição de nanopartículas poliméricas reticuladas (nanogéis) em resinas e compósitos odontológicos baseados em dimetacrilatos na contração volumétrica de polimerização. As partículas poliméricas foram sintetizadas utilizando mistura dos monômeros uretano dimetacrilato e isobornil metacrilato (razão 30:70 m
Publicado em: 2009
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10. Efeito do tempo e tipo de fotoativação e da ciclagem mecanica e termica na infiltração marginal de restaurações adesivas / Effect of light polimerization mode, time and mechanical and thermal load cycling on microleakage in adhesive restorations
The maintenance of the bond integrity between tooth and resin systems is important for the clinical success of composite resin restorations. Thus, the aim of this "in vitro" study composed of two manuscripts, was to evaluate the microleakage of Class II dental restorations: 1) made with an adhesive system and a dental composite, varying light curing time and
Publicado em: 2009
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11. Influence of resin-composite formulation on the intra-oral degradation : in vitro study / Influencia da formulação de resinas compostas na resistencia a degradação intra-oral : estudo in vitro
Natural teeth, as well as restorations, are composed of materials that are subject to deterioration. Besides chemical, mechanical and thermo degradation, the formulation and post-cure composites network are dominant mechanism to determine the restorations longevity. The purpose of this study was to investigate the effect of materials formulation, light
Publicado em: 2008
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12. Influência de diferentes fontes fotoativadoras na conversão de resinas compostas
This study evaluated the influence of different light sources on the conversion of different composite resins by Differential Scanning Calorimetry (DSC). Initially was determined the standard of the devices emission of light, one halogen light curing unit (Optilux 500 - Demetron/Kerr) and three generations of LEDs (LEC-470 I - MMOptics, Radii Plus - SDI and
Publicado em: 2007