Ultra Violet Radiation
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Inactivation of pathogens tracers in combined systems for sanitary sewer treatment and pre-disinfection / Inativação de indicadores patogênicos em sistemas combinados de tratamento e pré-desinfecção de esgoto sanitário
A proposta apresentada se baseia na introdução de um estágio intermediário de desinfecção previamento ao tratamento biológico visando intensificar os efeitos do estágio seguinte destinado à desinfecção convencional. Para estudo de caso foram aplicadas as técnicas de ozonização e radiação UV combinadas em instalações piloto que simulam duas
Publicado em: 2006
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2. Evaluation of Escherichia coli cells damages induced by ultraviolet and proton beam radiation
Prokaryote cells were exposed to ultra violet (UVc) radiation and to proton beams in order for the induced effects to be studied. Morphological and physiological alterations occurred in Escherichia coli (E. coli) cells exposed to the beams were investigated. The measurements using UVc radiation were made at the Biology Department of CEFET-PR while the measur
Brazilian Journal of Physics. Publicado em: 2005-09
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3. Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânio
Photodegradation of the PAHs anthracene, chrysene and benzo[k]fluoranthane on silica gel impregnated with TiO2 and over glass plates holding TiO2 was studied. Silica gel plates holding these substances were exposed to solar radiation, developed with hexane and photographed under ultra-violet light. The plates containing benzo[k]fluoranthene were also analyse
Química Nova. Publicado em: 2005-06
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4. Estabilidade à radiaÃÃo gama do poli(cloreto de vinila) aditivado e do poli(cloreto de vinila) quimicamente modificado
Poly (vinyl chloride)-PVC is a polar thermoplastic polymer compatible with a wide array of additives, which is used in several practical applications. Among the products made of PVC there are medical devices which need to be sterilized through gamma irradiation. In this work a study was made to evaluate the stability to gamma radiation of PVC additivated, as
Publicado em: 2004
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5. Sintese de fosfatidilcolinas diacetilenicas, preparação e caracterização de lipossomas polimerizados para aplicações na liberação controlada de medicamentos
Development of liposome applications has been limited by lipid bilayer instability, mainly for in vivo applications. Polymerizable lipids leads to more stable liposomes afier polymerization process, which represents a promising altemative for drug delivery by the oral administration route specially. In this work, diacetylenic polymerizable phoshpolipids anal
Publicado em: 2001
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6. The photodynamic action of UV sensitized methylene blue on the venom of Thailand cobra Naja siamensis
The photodynamic action of UV sensitized methylene blue (MB) was studied on the venom of Thailand cobra Naja siamensis. The reaction mixture comprising phosphate buffer (B), methylene blue (S), and venom protein (P) was exposed to UVR (ultra violet radiation) for 2 hours at 37°C. Stable excited species (S’) were generated by photodynamic action. These in
Journal of Venomous Animals and Toxins. Publicado em: 2000
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7. Construção e calibração energética por efeito fotoacústico de um laser de nitrogênio para uso em ensino e pesquisa. / Construction and energy calibration by photoacoustic effect of a nitrogen laser for use in teaching and research.
This dissertation treats the theory and construction of a pulsed molecular Nitrogen laser with high peak power which functions in the ultra-violet region (337,1 nm) for use in teaching and research. In addition we show the design and construction of a photo-acoustic cell whose function is to measure the energy of the laser pulses. This sensitive and precise
Publicado em: 1987
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8. ULTRA-VIOLET RADIATION IN ITS GENERAL APPLICATION TO DISEASE*
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9. ROENTGEN AND ULTRA-VIOLET RADIATION IN DERMATOLOGY: USES AND LIMITATIONS *
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10. The Action of Radiation in the Extreme Ultra-violet on Bacillus subtilis Spores
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11. Experimental Coronary Angioplasty Using a UV-Excimer Laser
Both conventional Argon- and NdYAG-lasers in continuous wave or pulsed application and far ultraviolet laser radiation are able to cause a loss of substance of biologic tissue. The thermic and ablative effects of NdYAG-lasers and UV-Excimer lasers at the wavelengths of 193 nm (ArF) and 248 mm (KrF) on inconspicuous and atherosclerotic human and animal corona
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12. Recombination in Saccharomyces cerevisiae: a DNA repair mutation associated with elevated mitotic gene conversion.
A mutant haploid strain of Saccharomyces cerevisiae has been isolated that is sensitive to the alkylating agent methyl methanesulfonate at a concentration of 0.01% (vol/vol). The strain also shows sensitivities to x-rays and ultra-violet light, which cosegregate with sensitivity to methyl methanesulfonate as a single gene defect. An analysis of the sensitivi