Solar Activity
Mostrando 13-24 de 113 artigos, teses e dissertações.
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13. Body orientation for thermoregulation and daily activity cycle of Mabuya macrorhyncha (Squamata: Scincidae)
ABSTRACT We investigated the daily activity and thermoregulatory body orientation of Mabuya macrorhyncha (Hoge, 1947), a lizard species that occurs in the Brazilian Atlantic Forest. We conducted this investigation in a sandy coastal dune remnant (“restinga” ecosystem) in Grussaí, state of Rio de Janeiro, Brazil, during the summer. The daily activity cyc
Zoologia (Curitiba). Publicado em: 26/04/2018
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14. Brazilian clinical engineering regulations: health equipment management and conditions for professional exercise
Abstract Introduction In Brazil, professionals, scientific community, and members of regulatory bodies have not yet achieved a consensus regarding who can legally perform the professional duties of a clinical engineer. We aim at clarifying this aspect, based on a detailed analysis of the pertinent regulations. Methods We acted on three fronts: (i) reviewin
Res. Biomed. Eng.. Publicado em: 13/11/2017
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15. Synthesis, Characterization, and Photocatalytic Activity of Pure and N-, B-, or Ag- Doped TiO2
This article reports the synthesis and characterization of pure and N-, B-, and Ag-doped TiO2 and the ability of these oxides to photodegrade methylene blue (MB) under sunlight or UV-ABC radiation. The compounds were synthesized using the sol-gel method and characterized by scanning electron microscopy, X-ray diffraction, diffuse reflectance spectroscopy, Fo
J. Braz. Chem. Soc.. Publicado em: 2017-09
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16. In vitro and in vivo evaluation of efficacy and safety of photoprotective formulations containing antioxidant extracts
ABSTRACT Chronic exposure to solar radiation could contribute to premature skin aging and skin cancer. Skin presents its own antioxidant defense, however when defenses are out of balance, reactive oxygen species could damage biological structures. In the present work, an oil-in-water photoprotective emulsion was developed and Bauhinia microstachya var. massa
Rev. bras. farmacogn.. Publicado em: 2016-04
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17. Assessment of cellulolytic microorganisms in soils of Nevados Park, Colombia
A systematized survey was conducted to find soil-borne microbes that degrade cellulose in soils from unique ecosystems, such as the Superpáramo, Páramo, and the High Andean Forest in the Nevados National Natural Park (NNNP), Colombia. These high mountain ecosystems represent extreme environments, such as high levels of solar radiation, low atmospheric pres
Braz. J. Microbiol.. Publicado em: 2014-12
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18. Frequency of estrus in Santa Inês, Texel and Ile de France ewes in the northwest of Paraná State, Brazil
The incidence of estrus in nulliparous Santa Inês (n = 16), Texel (n = 16) and Ile de France (n = 15) ewes fed two levels of crude protein (CP, 12 or 16%) was monitored from July 2005 to December 2006, and seasonality in the Santa Inês breed in the south of Brazil was characterized. The solar radiation data were recorded daily, and samples of blood were co
R. Bras. Zootec.. Publicado em: 2013-10
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19. ZnO electrodeposition onto gold from recordable compact discs and its use as photocatalyst under solar irradiation
A ZnO film was electrodeposited onto a gold substrate obtained from a recordable compact disc and tested as photocatalyst in degradation of dye in aqueous solution. X-ray diffractometry and atomic force microscopic analysis showed a pure ZnO phase with particle sizes in the nanometric scale. The results showed that the photocatalytic activity of the film is
Braz. J. Chem. Eng.. Publicado em: 2013-03
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20. Biomonitoramento vegetal da qualidade do ar em Ribeirão Preto - SP / Biomonitoring of air quality with plants in Ribeirão Preto - SP.
The air quality monitoring in Ribeirão Preto is carried out by Cetesb with conventional methods and, until now, no experimental study on air pollution biomonitoring was conducted in the region. The city has a growing number of motor vehicles and is located in one of the most important regions of the country for the sugarcane sector. The frequent burning of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/11/2012
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21. Variabilidade climática e correlação entre TSM e vazão fluvial nos rios Amazonas e Negro / Climate variability of the Atlantic and Pacific oceans and flow of the rivers Amazonas and Negro
Climate variability is a complex system generated by the participation of various actors and their role in atmospheric dynamics, the Sea Surface Temperature(SST) plays a key role in influencing the several features of the climate indexes: Southern Hemisphere Cancel Index Mode (SAM), Southern Oscillation Index (SOI), El Nino / Southern Oscillation (ENSO), (TN
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/03/2012
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22. Propagação guiada de ondas de VLF: aplicação ao estudo de fenômenos atmosféricos e naturais
Deep amplitude minima are observed in the daily records of Very Low Frequency (VLF, between 3 - 30 kHz) wave amplitudes. Amplitude minima are attributed to modal interference and modal conversion of waves propagating in the Earth - Ionosphere waveguide. The time of amplitude minima is related with the localization of the Terminator line and, therefore, is de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/02/2012
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23. PROTETORES SOLARES À BASE DE FILTROS INORGÂNICOS: DESENVOLVIMENTO E CARACTERIZAÇÃO
The inorganic sunscreens represented mainly by titanium dioxide (TiO2) and Zinc Oxide (ZnO), were classified as inert particles, therefore, they are pointed out as the best way to protect the skin against the harmful effects of ultraviolet radiation (UV). However, recent studies suggest that these particles have several stability problems that may lead to a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/01/2012
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24. Avaliação do farelo de mamona processado na alimentação de codornas japonesas. / Evaluation of castor meal processed in feeding of Japanese quail.
The experiments were conducted to evaluate the use of processed castor meal (FM) in diets of Japanese quail. Two experiments were conducted: the first was to determine the bromatological and the coefficients of metabolization of dry matter (CMMS), nitrogen (CMN) and gross energy (CMEB), as apparent metabolizable energy (EMA) and corrected for apparent nitrog
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/07/2011