Diffuse Radiation
Mostrando 1-12 de 43 artigos, teses e dissertações.
-
1. Green Synthesis of Upconverting NaYF4 and NaGdF4 Materials and Energy Levels Determination
An alternative green route using a domestic microwave oven to synthesize NaGdF4:Yb,Tm and NaYF4:Yb,Er was successfully developed. Decreasing dopants concentration increased the β-NaREF4/α-NaREF4 ratio in NaGdF4. The scanning electron microscopy (SEM) images of NaGdF4 showed particles ranging from 500 nm to 1 μm with formation of aggregates up to 100 μm,
J. Braz. Chem. Soc.. Publicado em: 2021-08
-
2. Determination of Diffused Irradiation from Horizontal Global Irradiation - Study for the City of Curitiba
Abstract Understanding the solar radiation values in the surface is important for the development of solar energy projects, obtaining through radiometers installed in certain places or publications as in solar energy atlases. Typically, solar or weather stations do not have sensors to measure diffuse irradiation due to high investment and the need for const
Braz. arch. biol. technol.. Publicado em: 25/11/2019
-
3. 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
-
4. 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
-
5. Consumo de agua y rendimiento de tomate de cáscara bajo diferentes cubiertas de invernaderos
ABSTRACT In Mexico, tomatillo (Physalis ixocarpa) is cultivated in the field, in small areas with low technology and low yields. To understand the behavior of tomatillo and increase its yield, the P. ixocarpa cv. Rendidora crop was evaluated. The evaluation was done in greenhouse under three protective structures covered with different materials and their in
Hortic. Bras.. Publicado em: 2017-04
-
6. INFLUENCIA DEL USO DE MALLA PERLA Y ROJA EN LAS CONDICIONES MICRO-CLIMÁTICAS, DAÑO POR SOL Y DESARROLLO DE COLOR DE FRUTOS EN HUERTOS DE MANZANOS CVS. GALA Y FUJI
ABSTRACT Sun damage and the lack of color of fruits produced by excessive solar radiation and high temperatures is the biggest production problem in apple orchards in Chile. The objective of this research was to evaluate the use of colored nets as a tool for control of sun damage and improve color on apples. During the 2012-13 and 2013-14 season ´Fuji´ an
Rev. Bras. Frutic.. Publicado em: 30/03/2017
-
7. Layered Zinc Hydroxide Salts Intercalated with Anionic Surfactants and Adsolubilized with UV Absorbing Organic Molecules
Two anionic surfactants, dodecylsulfate (DDS) and dodecylbenzenesulfonate (DBS), were intercalated into layered zinc hydroxide salts (LHS) using the direct alkaline co-precipitation method, and characterized by powder X-ray diffraction (PXRD), Fourier-transform infrared (FTIR) and thermogravimetric analysis/differential thermal analysis (TGA/DTA). Different
J. Braz. Chem. Soc.. Publicado em: 2015-09
-
8. Serious stomatitis and esophagitis: a peculiar mucous reaction induced by pegylated liposomal doxorubicin
AbstractPegylated liposomal doxorubicin is an important antineoplastic agent with activity in a variety of solid tumors. It has a totally different profile of pharmacokinetics and toxicity compared with doxorubicin. It rarely causes side-effects like cardiotoxicity or hair loss, but frequently results in many kinds of mucocutaneous reactions, including palma
An. Bras. Dermatol.. Publicado em: 2015-06
-
9. Síntese, caracterização e atividade fotocatalítica de catalisadores nanoestruturados de TiO2 dopados com metais
Titanium dioxide nanostructured catalysts (nanotubes) doped with different metals (silver, gold, copper, palladium and zinc) were synthesized by the hydrothermal method in order to promote an increase in their photocatalytic activity under visible light. The catalysts were characterized by X-ray diffraction, diffuse reflectance spectroscopy, transmission ele
Quím. Nova. Publicado em: 2013
-
10. Calibration of the GEM synchrotron emission map using the ARCADE 2 experiment data / Calibração do mapa de emissão síncrotron do radiotelescópio GEM utilizando os dados de temperatura absoluta do experimento ARCADE 2
The motivation of this work is to produce a synchrotron emission map in a range of frequencies not yet well mapped, between 408 MHz and 23 GHz, in order to assist the foreground separation process on the data analysis of the Cosmic Microwave Background (CMB) radiation. We used the data from GEM (Galactic Emission Mapping) telescope, whose dominant processes
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2011
-
11. Solar radiation use efficiency by soybean under field conditions in the Amazon region.
Abstract ? The objective of this work was to evaluate the efficiency of soybean (Glycine max) in intercepting and using solar radiation under natural field conditions, in the Amazon region, Brazil. The meteorological data and the values of soybean growth and leaf area were obtained from an agrometeorological experiment carried out in Paragominas, Pará state
Pesquisa Agropecuária Brasileira. Publicado em: 2011
-
12. Materiais híbridos orgânico-inorgânicos (ormosil) obtidos por sol-gel com potencial uso como filtro solar
This work aimed at the synthesis and characterization of particles of modified silica containing the organic filter dibenzoylmethane (DBM) by the hydrolytic sol-gel method, with modifications to the Stöber route. The structures of the resulting Xerogels were characterized by diffuse reflectance UV-VIS spectroscopy in the solid state, infrared absorption spe
Química Nova. Publicado em: 2011