1,937 research outputs found
Disentangling the near infrared continuum spectral components of the inner 500 pc of Mrk 573: two-dimensional maps
We present a near infrared study of the spectral components of the continuum
in the inner 500500 pc of the nearby Seyfert galaxy Mrk573 using
adaptive optics near-infrared integral field spectroscopy with the instrument
NIFS of the Gemini North Telescope at a spatial resolution of 50 pc. We
performed spectral synthesis using the {\sc starlight} code and constructed
maps for the contributions of different age components of the stellar
population: young ( Myr), young-intermediate (
Myr), intermediate-old ( Myr Gyr) to the
near-IR K-band continuum, as well as their contribution to the total stellar
mass. We found that the old stellar population is dominant within the inner 250
pc, while the intermediate age components dominate the continuum at larger
distances. A young stellar component contributes up to 20% within the
inner 70 pc, while hot dust emission and featureless continuum components
are also necessary to fit the nuclear spectrum, contributing up to 20% of the
K-band flux there. The radial distribution of the different age components in
the inner kiloparsec of Mrk573 is similar to those obtained by our group for
the Seyfert galaxies Mrk1066, Mrk1157 and NGC1068 in previous works using a
similar methodology. Young stellar populations (100 Myr) are seen in the
inner 200-300 pc for all galaxies contributing with 20% of the K-band
flux, while the near-IR continuum is dominated by the contribution of
intermediate-age stars (100 Myr-2 Gyr) at larger distances. Older stellar
populations dominate in the inner 250 pc
Avaliação preliminar do comportamento de cultivares de sorgo sacarino em Capitão Poço-PA.
bitstream/item/33800/1/CPATU-CirTec32.pd
Aptidão edafo-climática da região situada entre a Serra dos Carajás e o Porto de Itaqui para mandioca, babaçu, dendê, cana-de-açúcar e seringueira.
bitstream/item/28927/1/CPATU-BP18.pd
Estudos mesoclimáticos: variação termopluviométrica em campos experimentais da EMBRAPA-CPATU no Estado do Pará.
O estudo visa a obtenção e análise de dados meteorológicos na região amazônica em Unidades de Pesquisa da EMBRAPA e em áreas agrícolas sob pressão de ocupação, carentes de informações climáticas. O objetivo é contribuir para a expansão da rede meteorológica regional e conhecimento das condições climáticas e sua variabilidade para a orientação a programas de pesquisa e de desenvolvimento ligados à agropecuária ou a outras atividades humanas notadamente saúde, transporte e construção civil.bitstream/item/57660/1/CPATU-PA134.pd
Soroprevalência da infecção por Chlamydophila abortus em pequenos ruminantes explorados na microrregião do Alto Médio Gurguéia, no estado do Piauí, Brasil.
[Chlamydophila abortus infection seroprevalence in small ruminants exploited in the Upper Middle Gurguéia Microregion, State of Piaui, Brazil]. Abstract: Aiming estimate the Chlamydophila abortus seroprevalence in small ruminants at upper middle Gurguéia microregion, 352 sheep and 298 goats serum samples were collected. Complement Fixation test was performed for Chlamydophila sp. diagnosis (OIE, 2000). The reaction was conducted in microplates using test serum dilutions of 1:16 to 1:512. The prevalence in small ruminants was 12.61% (82/650). Therefore, the infectious agent Chlamydophila abortus is present in sheep and goat flocks in microregion of the High Middle Gurguéia in the state of Piauí.Trabalho apresentado nos Anais do VII Congresso Norte Nordeste de Reprodução Anima (CONERA), Mossoró, maio, 2014
Efeito do inseticida ciromazina sobre parasitoides idiobiontes da mosca-minadora em plantas de meloeiro.
O presente trabalho objetivou verificar o efeito do inseticida, ciromazina, sobre os parasitoides idiobiontes da mosca-minadora em meloeiro
Multi-Analytical approach reveals potential microbial indicators in soil for sugarcane model systems.
This study focused on the effects of organic and inorganic amendments and straw retention on the microbial biomass (MB) and taxonomic groups of bacteria in sugarcane-cultivated soils in a greenhouse mesocosm experiment monitored for gas emissions and chemical factors. The experiment consisted of combinations of synthetic nitrogen (N), vinasse (V; a liquid waste from ethanol production), and sugarcane-straw blankets. Increases in CO2-C and N2O-N emissions were identified shortly after the addition of both N and V to the soils, thus increasing MB nitrogen (MB-N) and decreasing MB carbon (MB-C) in the N+V- amended soils and altering soil chemical factors that were correlated with the MB. Across 57 soil metagenomic datasets, Actinobacteria (31.5%), Planctomycetes (12.3%), Deltaproteobacteria (12.3%), Alphaproteobacteria (12.0%) and Betaproteobacteria (11.1%) were the most dominant bacterial groups during the experiment. Differences in relative abun- dance of metagenomic sequences were mainly revealed for Acidobacteria, Actinobacteria, Gammaproteobacteria and Verrucomicrobia with regard to N+V fertilization and straw re- tention. Differential abundances in bacterial groups were confirmed using 16S rRNA gene- targeted phylum-specific primers for real-time PCR analysis in all soil samples, whose re- sults were in accordance with sequence data, except for Gammaproteobacteria. Actino- bacteria were more responsive to straw retention with Rubrobacterales, Bifidobacteriales and Actinomycetales related to the chemical factors of N+V-amended soils. Acidobacteria subgroup 7 and Opitutae, a verrucomicrobial class, were related to the chemical factors of soils without straw retention as a surface blanket. Taken together, the results showed that MB-C and MB-N responded to changes in soil chemical factors and CO2-C and N2O-N emissions, especially for N+V-amended soils. The results also indicated that several taxo- nomic groups of bacteria, such as Acidobacteria, Actinobacteria and Verrucomicrobia, and Competing Interests: The authors have declared that no competing interests exist. their subgroups acted as early-warning indicators of N+V amendments and straw retention in sugarcane-cultivated soils, which can alter the soil chemical factors
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