Sunglasses
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Síntese de fotoprotetores e sua imobilização em poli(metacrilato de metilo): um projeto integrado de química orgânica, química de polímeros e fotoquímica
Dibenzalacetone and other aldol condensation products are known sunscreens commonly used in cosmetics. This type of compounds can easily be prepared in an Organic Chemistry Lab by reaction of aldehydes with ketones in basic medium. These compounds can be incorporated in poly(methyl methacrylate) and used as UV light absorbers, for example in sunglasses. This
Química Nova. Publicado em: 2010
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2. Uma contribuição para circuitos eletrônicos de medidores de radiações ultravioleta para lentes / A contribution to electronic circuits of ultraviolet radiation meters lens
O propósito deste trabalho foi o desenvolvimento de um sistema para medir a transmissão das radiações no intervalo 290nm - 380nm, em lentes oftálmicas. O protótipo é um dispositivo opto-eletrônico, composto por uma fonte de ultravioleta; dois sensores de radiação - UVA e UVB (fotodiodos); um circuito eletrônico para a realização das medidas e um
Publicado em: 2009
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3. Spectrophotometric assessment of the effects of 10% carbamide peroxide on enamel translucency
Tooth shade results from the interaction between enamel color, enamel translucency and dentine color. A change in any of these parameters will change a tooth’s color. The objective of this study was to evaluate the changes occurring in enamel translucency during a tooth whitening process. Fourteen human tooth enamel fragments, with a mean thickness of 0.96
Brazilian Oral Research. Publicado em: 2008-03
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4. Do sunglasses protect the retina from light damage?
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5. Passenger side airbag ocular injury while wearing sunglasses.
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6. Sunglasses--an ocular hazard?
A suggestion that protective eye gear can pose a threat either to the crystalline lens or to the retina is examined from an epidemiological point of view. It is concluded that it may accentuate a pre-existing high-risk hazard but has little significance for low-risk hazards.
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7. Trial of a laminated material to reduce glare in cataract.
A recently-introduced laminated material which accepts light only over a small angle on either side of the normal was compared to standard Polaroid sunglasses. A preliminary trial failed to show any superiority of the new material in reducing glare for patients with moderate cataract.
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8. A lysosomal tetraspanin associated with retinal degeneration identified via a genome-wide screen
The Drosophila visual system has provided a model to study phototransduction and retinal degeneration. To identify new candidate proteins that contribute to these processes, we conducted a genome-wide screen for genes expressed predominately in the eye, using DNA microarrays. This screen appeared to be comprehensive as it led to the identification of all 22
Nature Publishing Group.