Uvc
Mostrando 1-12 de 152 artigos, teses e dissertações.
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1. Desenvolvimento de um purificador de ar com radiação UVC e filtro HEPA no contexto de COVID-19
RESUMO A transmissão de infecções respiratórias tem importante impacto na saúde humana, sobretudo no atual contexto da pandemia de COVID-19. Neste trabalho, discute-se um purificador de ar que utiliza radiação ultravioleta-C (UVC) e filtro high efficiency particulate air (HEPA) como mecanismos para descontaminar ambientes internos com baixa circulaç�
Engenharia Sanitaria e Ambiental. Publicado em: 2022
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2. PhotoMetrix UVC: A New Smartphone-Based Device for Digital Image Colorimetric Analysis Using PLS Regression
A novel free PhotoMetrix UVC is proposed for both the operation of a universal serial bus video camera (UVC) and multivariate image analysis, allowing a full solution for point-of-use analysis. A UVC was placed in an open-source 3D-printed chamber illuminated by a white light-emitting diode (LED) with controlled intensity of light. The digital images capture
J. Braz. Chem. Soc.. Publicado em: 2021-03
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3. Effects of ethanol and ultraviolet-c treatments on inactivation of Rhizopus oryzae spores which cause postharvest rot
Abstract Rhizopus oryzae is a filamentous fungi reported as a postharvest pathogen in recent years. Ethanol treatment (0, 10, 20, and 30%) and UVC irradiation (0, 1, 2, 5, 10 minutes) were used both individually and in combination for the inactivation of Rhizopus oryzae spores. Survival ratio of the spores and LD50 values for ethanol and UVC irradiation were
Food Sci. Technol. Publicado em: 14/11/2018
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4. Uso combinado de radiación UV-C y biorecubrimiento de quitosán con aceites esenciales para el control de hongos en papaya Maradol
Abstract Anthracnose and soft rot cause deterioration of quality as well as large losses during post-harvest handling of papaya fruits. The single strategies for disease control is little efficient. We analyzed the effect of to integrate control strategies on the incidence of disease caused by the inoculation of spores of the fungi Colletotrichum gloeospori
Rev. Bras. Frutic.. Publicado em: 24/05/2018
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5. Suspended and Immobilized TiO2 Photocatalytic Degradation of Estrogens: Potential for Application in Wastewater Treatment Processes
This work evaluated the photocatalytic activity of suspended TiO2, and TiO2-coated glass Raschig rings with respect to degradation of estrogens estrone (E1), 17β-estradiol (E2), and 17α-ethinylestradiol (EE2) in aqueous solutions and wastewater effluent samples. Gas chromatography/tandem mass spectrometry (GC-MS/MS) studies were carried out to identify deg
J. Braz. Chem. Soc.. Publicado em: 2018-02
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6. ASSEMBLY OF LOW-COST LAB-MADE PHOTOREACTOR FOR PREPARATION OF NANOMATERIALS
In this paper, a low-cost and versatile lab-made photoreactor was constructed for the preparation of nanomaterials such as gold nanoparticles and reduced graphene oxide. The power of the lab-made photoreactor can be easily adjusted according to the number of lamps turned on. Moreover, the lab-made photoreactor allows the utilization of different sources of i
Quím. Nova. Publicado em: 2018-01
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7. TiO2 thin Films for Biofouling Applications
This work presents a study of TiO2 thin films prepared by sputtering, for using as protection for biofouling action on marine structures. Titanium oxide thin films were prepared with different amount of oxygen on the surface of regular 1020 steel, a structural material for marine technology. The cristalline structure analysis evidenced the formation of anata
Mat. Res.. Publicado em: 23/10/2017
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8. Effect of Fe3+ Doping in the Photocatalytic Properties of BaSnO3 Perovskite
In the last ten years, stannates with perovskite structure have been tested as photocatalysts. In spite of the ability of perovskite materials to accommodate different cations in its structure, evaluation of doped stannates is not a common task in the photocatalysis area. In this work, Fe3+ doped BaSnO3 was synthesized by the modified Pechini method, with ca
Mat. Res.. Publicado em: 10/08/2017
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9. COMPOSIÇÃO FÍSICO-QUÍMICA E ANÁLISE SENSORIAL DO SUCO INTEGRAL DE UVAS IRRADIADAS COM LUZ ULTRAVIOLETA DO TIPO C
RESUMO O suco de uva vem sendo amplamente estudado pela presença dos compostos fenólicos e seu efeito benéfico para saúde humana. A irradiação ultravioleta do tipo C (UV-C) pode aumentar compostos fenólicos, antociânicos e contribuir com a aceitabilidade sensorial. Este trabalho teve como objetivo avaliar no suco o efeito da aplicação de diferente
Rev. Bras. Frutic.. Publicado em: 27/07/2017
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10. CARACTERIZAÇÃO FÍSICO-QUÍMICA E ATIVIDADE ANTIOXIDANTE DE SUCOS ELABORADOS A PARTIR DE UVAS IRRADIADAS
RESUMO O presente trabalho teve como objetivo a caracterização físico-química, bem como a avaliação da atividade antioxidante, teor de fenólicos totais, vitamina C e antocianinas de sucos elaborados a partir de uvas cultivar Isabel submetidas a diferentes doses de radiação UV-C. Os frutos foram colhidos, sanitizados e inseridos em uma câmara de ra
Rev. Bras. Frutic.. Publicado em: 03/07/2017
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11. Caracterização físico-química, atividade antioxidante e teor de fenólicos totais em maçãs 'Gala' submetidas a diferentes doses de radiação UV-C
RESUMO. A radiação UV-C é um método de conservação de alimentos que visa o prolongamento da vida útil do produto, a inativação de microrganismos, além de estimular a síntese de compostos fenólicos. O presente trabalho teve como objetivo a caracterização físico-química, bem como a avaliação da atividade antioxidante e teor de fenólicos tota
Acta Sci., Agron.. Publicado em: 2017-03
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12. Pullulan as a stabilizer agent of polymeric nanocapsules for drug delivery
ABSTRACT Polymeric stabilizers have received attention in the preparation of nanostructured systems due to their ability to enhance formulation stability. Considering this, the objective of this work was to prepare poly(ε-caprolactone) nanocapsules using the pullulan as a polymeric stabilizer. The nanocapsules were prepared using the interfacial deposition
Braz. J. Pharm. Sci.. Publicado em: 2016-12