Photo Aging
Mostrando 1-10 de 10 artigos, teses e dissertações.
-
1. Materiales eco-compatibles reforzados a base de almidón de mandioca para aplicaciones agronómicas
ABSTRACT Plastic mulch is used in various crops production in order to increase yield, extend growing season, weed control, increase fertilizers efficiency and improve soil conditions. However, since such plastics removal and disposal represent not only an additional cost, but also a source of environmental pollution, interest in starch-based materials as a
Matéria (Rio J.). Publicado em: 02/08/2018
-
2. Optimal hydrated lime concentration in asphalt binder to improve photo degradation resistance
Abstract The effect of short-term oxidation, evaluated by using a Rolling Thin Film Oven Test, and the effect of weathering aging on the oxidation process of hydrated lime modified asphalts were studied. Hydrated lime (HL) has been known as an additive for asphalt mixtures and is now considered as a binder additive that increases asphalt mixture durability.
REM, Int. Eng. J.. Publicado em: 2018-04
-
3. Effects of cement-curing mode and light-curing unit on the bond durability of ceramic cemented to dentin
The aim of this study was to evaluate the effects of different light-curing units and resin cement curing types on the bond durability of a feldspathic ceramic bonded to dentin. The crowns of 40 human molars were sectioned, exposing the dentin. Forty ceramic blocks of VITA VM7 were produced according to the manufacturer's recommendations. The ceramic surface
Braz. oral res.. Publicado em: 01/03/2013
-
4. Classification of polymers insulators hydrophobicity basead on digital image processing
Although the hydrophobicity is usually an arduous parameter to be determined in the field, it has been pointed out as a good option to monitor aging of polymeric outdoor insulators. Concerning this purpose, digital image processing of photos taken from wet insulators has been the main technique nowadays. However, important challenges on this technique still
Materials Research. Publicado em: 27/03/2012
-
5. Evaluation of the proliferative and synthesis effects induced by intense pulsed light in human fibroblasts and endothelial cells / Avaliação dos efeitos proliferativos e de síntese induzidos pela luz intensa pulsada em fibroblastos e células endoteliais humanas
A luz intensa pulsada é amplamente utilizada para o tratamento do fotoenvelhecimento e de lesões vasculares congênitas e adquiridas, porém, seus efeitos biológicos ainda não são completamente esclarecidos. Neste estudo, foram avaliadas as respostas proliferativas e de síntese em fibroblastos e células endoteliais humanas após a irradiação com a l
Publicado em: 2011
-
6. Estudo da pele humana fotoenvelhecida após tratamento com terapia fotodinâmica associada ao ácido 5-delta-aminolevulínico tópíco: avaliação imunoistoquímica, do colágeno e do tecido elástico / Study of photo aged human skin after photodynamic therapy treatment with topic 5 delta aminolevulinic acid: immunohistochemical, colagenous and elastic fibre analysis.
PDT is nowadays considered one of the therapies for photo-aging, since it gives a satisfactory response for both, aesthetic result as well as treating and preventing pre-malignous lesions that are a frequent outcome of photo-aged skin. The selective destruction of target tissue occurs through a chemical reaction, by using a photosensitizing agent exposed to
Publicado em: 2007
-
7. Influencia do tipo de fonte fotoativadora e meios de envelhecimento sobre a natureza e integridade marginal de restaurações em resina composta / Influence of photo-curing devices and aging types on the hardness and marginal integrity of composite resin restorations
Atualmente no mercado, muitos são os aparelhos utilizados para fotoativação das restaurações em resina composta. Uma polimerização adequada é essencial para obtenção de restaurações com propriedades físico-mecânicas ideais e resistentes aos desafios encontrados no meio bucal. Os objetivos deste estudo foram avaliar a influência do tipo de font
Publicado em: 2007
-
8. Influence of photo-curing devices and aging types on the hardness and marginal integrity of composite resin restorations / Influencia do tipo de fonte fotoativadora e meios de envelhecimento sobre a natureza e integridade marginal de restaurações em resina composta
Atualmente no mercado, muitos são os aparelhos utilizados para fotoativação das restaurações em resina composta. Uma polimerização adequada é essencial para obtenção de restaurações com propriedades físico-mecânicas ideais e resistentes aos desafios encontrados no meio bucal. Os objetivos deste estudo foram avaliar a influência do tipo de font
Publicado em: 2007
-
9. Evaluation of parameters associated with UV/EB cured clearcoats degradation used in outdoor environment / Avaliação da formação e degradação de filmes de vernizes curados por radiação ultravioleta e feixe de elétrons e expostos ao envelhecimento acelerado
The materials curable by ultraviolet (UV) or electron beam (EB) radiation such as inks, adhesives and coatings are reactive compounds made up of resin, monomer, photoinitiator and additives which undergo polymerization and crosslinking under irradiation producing thermoset products. This technology has been used in a great variety of industrial applications,
Publicado em: 2003
-
10. Degradação foto-oxidativa da borracha deEPDM vulcanizada
ln this thesis the photo-oxidative degradation of dicumyl peroxide vulcanized EPDM rubber was studied. This rubber is an ethylene/propylene/ ethylidene norbornene terpolymer. Due to its random structure it is an amorphous material. The first part of the thesis describes the photo and thermal oxidation and the photo stabilization of thin films. The oxidation
Publicado em: 1990