Irradiance
Mostrando 13-24 de 318 artigos, teses e dissertações.
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13. Impact of light quality on flavonoid production and growth of Hyptis marrubioides seedlings cultivated in vitro
ABSTRACT Hyptis marrubioides Epling, Lamiaceae, a species from Brazilian Cerrado, has been used against gastrointestinal infections, skin infections, pain, and cramps. Herein, H. marrubioides seedlings were cultured in vitro under different wavelengths (white, blue, green, red, and yellow) with 50 µmol m-2 s-1 irradiance and a 16-h photoperiod. After 20 and
Rev. bras. farmacogn.. Publicado em: 2017-08
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14. Fruit sphere microenvironments and berry phenolic content of Cabernet Sauvignon (Vitis vinifera L.) cultivated under rain-shelter systems with coloured plastic film
Abstract Rain-shelter cultivation has been proven an important cultivation method for grape-plantings in continental monsoon climate zones, of which white plastic films are the most common shelter material. However, while this method and material reduces the occurrence of the disease, it can also decrease the grape berry quality. Five colours (including red,
Food Sci. Technol. Publicado em: 20/07/2017
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15. Partitioning of the diffuse attenuation coefficient for photosynthetically available irradiance in a deep dendritic tropical lake
ABSTRACT We studied the effects of particulate and dissolved optically active components on the attenuation of photosynthetic active radiation (PAR) in a tropical lake. The temporal and spatial distribution of tripton, Chl-a and aCDOM(440) and their relative contribution to the diffuse PAR attenuation coefficient (Kd) was investigated at 21 sites (dry and we
An. Acad. Bras. Ciênc.. Publicado em: 2017-05
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16. Growth, photosynthetic pigments and production of essential oil of long-pepper under different light conditions
ABSTRACT Piper hispidinervum C. DC. is popularly known as long-pepper and it owns a commercial value due to the essential oil it produces. Long-pepper oil is rich in safrole and eugenoln components that have insecticidal, fungicidal and bactericidal activity. It has been establish that to medicinal plants light influences not only growth but also essential o
An. Acad. Bras. Ciênc.. Publicado em: 27/04/2017
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17. Effects of modeling liquid/resin and polishing on the color change of resin composite
Abstract Modeling liquids/resins have been used to build up resin composite (RC) restorations, although there is a lack of information regarding their effects on the color stability of the latter. Therefore, the purpose of the present study was to evaluate the effects of the presence of modeling liquid between layers of RC and the finishing/polishing state o
Braz. oral res.. Publicado em: 18/08/2016
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18. Exploring Light-Based Technology for Wound Healing and Appliance Disinfection
Our goal was to build, characterize and test a red light-emitting diode (LED) device suitable for wound healing and disinfection of biomedical appliances. We designed and built a unique irradiator metallic box, for which irradiation distribution and spectral irradiance were calculated. In addition, we explored the device’s potential in photobiology compari
J. Braz. Chem. Soc.. Publicado em: 2015-12
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19. Production of phycobiliproteins by Arthrospira platensis under different lightconditions for application in food products
There has been an increase in investment in research on new sources of natural pigments for food application. Some cyanobacteria can change the structures responsible for light harvesting and cellular processes according to the wavelength and light intensity. This phenomenon has been described as complementary chromatic adaptation. The present study aimed
Food Sci. Technol. Publicado em: 2015-04
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20. Biomass production by Arthrospira platensis under different culture conditions
In biotechnological processes, the culture media components are responsible for high costs and exert a strong influence on the cyanobacteria behavior. The objective of this study was to evaluate the Arthrospira platensis growth potential for biomass production under different cultivation conditions using an experimental design. Three factors that are importa
Food Sci. Technol. Publicado em: 2015-03
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21. Changes in irradiance and energy density in relation to different curing distances
The present study aimed to assess the influence of curing distance on the loss of irradiance and power density of four curing light devices. The behavior in terms of power density of four different dental curing devices was analyzed (Valo, Elipar 2, Radii-Cal, and Optilux-401) using three different distances of photopolymerization (0 mm, 4 mm, and 8 mm). All
Braz. oral res.. Publicado em: 2015
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22. Light affects Varronia curassavica essential oil yield by increasing trichomes frequency
Light can act on essential oil yield directly on synthesis of secondary metabolites, or indirectly on plant growth. Varronia curassavica Jacq., Boraginaceae, is a native medicinal species from Brazil known as “erva-baleeira”, with anti-inflammatory activity related to its essential oil. Despite pharmacological evidences of this species and its economic i
Rev. bras. farmacogn.. Publicado em: 2014-10
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23. Microhabitat de Tolypothrix distorta Kütz. ex Bornet & Flahault (Microchaetaceae, Cyanophyta) em dois riachos da região Centro-Sul do Estado do Paraná, Brasil
This study aimed to evaluate some microhabitat characteristics of two populations of Tolypothrix distorta in streams from midsouthern region of Paraná State on a seasonal period. Each population was monthly investigated for the abundance of T. distorta and environmental variables such as depth, current velocity, irradiance, richness, and substrate diversity
Hoehnea. Publicado em: 2013-12
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24. Laboratory apparatus to evaluate microalgae production
The application of microalgae for energy purposes and CO2 biomitigation continues to present a number of challenges, including the optimization of culture conditions. The application of experimental designs for microalgae cultivation is difficult, since experiments involving such microorganisms generally last days or weeks. This work proposes a multipurpose
Braz. J. Chem. Eng.. Publicado em: 2013-09