Natural Terrestrial Radiation
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Avaliação das doses efetivas e efetivas coletivas da radiação natural na região de Ribeirão Preto (SP) / Effective Dose and Collective Effective Dose Evaluation from Natural Radiation in the Region of Ribeirão Preto (SP)
Medidas da radiação gama ambiental foram feitas em algumas regiões da cidade de Ribeirão Preto-SP, de forma a contribuir para o conhecimento acerca dos níveis desse tipo de radiação no estado de São Paulo e no território brasileiro. Escolheu-se determinar as médias anuais de dose efetiva e dose efetiva coletiva, uma vez que estas grandezas levam em
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/03/2012
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2. Investigation the natural radioactivity in local and imported chemical fertilizers
In order to assess the radioactive level in the environment, the specific activities of 238U, 232Th and 40K were measured by using a gamma ray spectrometer based on a NaI(Tl) detector. The results showed that the specific activities of 238U, 232Th and 40K were 12.846-88.585, 1.304-26.656 and 11.598-2275.896 Bq/kg respectively. The radium equivalent activity
Brazilian Archives of Biology and Technology. Publicado em: 2011-08
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3. Analysis microclimatic of mangroves in Barra of river Ribeira-Iguape / SP / Análise microclimática dos manguezais da Barra do Ribeira-Iguape/SP
The mangrove is defined as a coastal ecosystem of transition between terrestrial and marine environments and is characterized by salinized environment and the constant flooding caused by tides. With emphasis in the area of coastal systems Cananéia - Iguape, its importance is more related to the production of biomass, inserted in the natural bioenergy system
Publicado em: 2009
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4. Estudo cristaloquímico de quatro derivados fenazínicos utilizando a difração de raios-X.
In general, natural and synthetic phenazines have attracted much attention because of their biological activities, like antitumour agents antimalarials, antibiotics, among others. The natural phenazines are isolated as secondary metabolites of terrestrial and marine microorganisms, mainly of Pseudomonas spp. and Streptomyces spp. This work aiming the structu
Publicado em: 2008
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5. "Geographic Cosmography: the astronomy in geography teaching" / "Cosmografia geográfica: a astronomia no ensino de geografia"
This research relates Astronomy Teaching to Geography Teaching and approaches a great number of subjects that express important relations between the terrestrial knowledge and the celestial knowledge. We have studied a field that is part of Cosmography and consists in a new reading in the Geography area, which is designated as "Geographic Cosmography", inste
Publicado em: 2006
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6. Avaliação da atenuação da vegetação da Mata Atlantica a radiação gama natural emitida pela superficie
Several natural alpha, beta and gamma radionuclides are known. Most of them occur in rock-forming minerals Potassium, uranium and thorium are the main natural gamma radiation producers. This radiation can be measured in the laboratory, field or from aircrafts. In this case, besides atmospheric attenuation, vegetation can absorb substantial amounts of radiati
Publicado em: 1997
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7. Solar UV-B Radiation Inhibits the Growth of Antarctic Terrestrial Fungi
We tested the effects of solar radiation, and UV-B in particular, on the growth of Antarctic terrestrial fungi. The growth responses to solar radiation of five fungi, Geomyces pannorum, Phoma herbarum, Pythium sp., Verticillium sp., and Mortierella parvispora, each isolated from Antarctic terrestrial habitats, were examined on an agar medium in the natural A
American Society for Microbiology.
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8. Bacteria in the Leaf Ecosystem with Emphasis on Pseudomonas syringae—a Pathogen, Ice Nucleus, and Epiphyte
The extremely large number of leaves produced by terrestrial and aquatic plants provide habitats for colonization by a diversity of microorganisms. This review focuses on the bacterial component of leaf microbial communities, with emphasis on Pseudomonas syringae—a species that participates in leaf ecosystems as a pathogen, ice nucleus, and epiphyte. Among
American Society for Microbiology.
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9. The ammonia monooxygenase structural gene amoA as a functional marker: molecular fine-scale analysis of natural ammonia-oxidizing populations.
The naturally occurring genetic heterogeneity of autotrophic ammonia-oxidizing populations belonging to the beta subclass of the Proteobacteria was studied by using a newly developed PCR-based assay targeting a partial stretch of the gene which encodes the active-site polypeptide of ammonia monooxygenase (amoA). The PCR yielded a specific 491-bp fragment wit