Podridão radicular em mandioca no norte do Estado do Maranhão.

bitstream/item/58029/1/CT-192-.pd

Astrometry of mutual approximations between natural satellites. Application to the Galilean moons

Typically we can deliver astrometric positions of natural satellites with errors in the 50-150 mas range. Apparent distances from mutual phenomena, have much smaller errors, less than 10 mas. However, this method can only be applied during the equinox of the planets. We developed a method that can provide accurate astrometric data for natural satellites -- the mutual approximations. The method can be applied when any two satellites pass close by each other in the apparent sky plane. The fundamental parameter is the central instant $t_0$ of the passage when the distances reach a minimum. We applied the method for the Galilean moons. All observations were made with a 0.6 m telescope with a narrow-band filter centred at 889 nm with width of 15 nm which attenuated Jupiter's scattered light. We obtained central instants for 14 mutual approximations observed in 2014-2015. We determined $t_0$ with an average precision of 3.42 mas (10.43 km). For comparison, we also applied the method for 5 occultations in the 2009 mutual phenomena campaign and for 22 occultations in the 2014-2015 campaign. The comparisons of $t_0$ determined by our method with the results from mutual phenomena show an agreement by less than 1-sigma error in $t_0$, typically less than 10 mas. This new method is particularly suitable for observations by small telescopes.Comment: 13 pages, 11 figures and 8 tables. Based on observations made at the Laborat\'orio Nacional de Astrof\'isica (LNA), Itajub\'a-MG, Brazi

Importância do manejo de entressafra.

bitstream/item/57789/1/Importancia-manejo.pd

Digestão de tecido vegetal em forno de micro-ondas via sistema aberto.

bitstream/item/72356/1/ID-29940.pd

Morfologia urbana e qualidade do ar: uma proposição metodológica aplicada em caso empíricono Rio de Janeiro

Considerando a importância das cidades como fontes emissoras de poluentes e polos de concentração de população, o trabalho investigapossíveis impactos de aspectos da forma urbana nas concentrações de poluentes. O artigo discute o estado da artesobre as interações entre a qualidade do ar e indicadoresda forma urbana, compara e testa diferentes indicadores da forma urbana, incluindo um indicador de compacidadetridimensional proposto. O artigo sugere uma forma de modelagem e avaliação dessas relações, e apresenta, por fim, um estudo de caso na cidade do Rio de Janeiro, envolvendo métodos estatísticos aplicados a poluentes (SO2, CO e PI), variáveis morfológicas (taxa de ocupação e percentagem de verticalização) e meteorológicas (vento – direção e velocidade -, precipitação pluvial e temperatura do ar). Os resultados apontam para graus de influência das variáveis taxa de ocupação e verticalização na concentração dos poluentes considerados.Considering the importance of cities as pollutants emission sources and population hubs, the work researches possible impacts of the urban form aspects on pollutants concentrations. The paper discussesthe state of art of interactions between air quality and urban form indexes, compares and tests different indicators of urban form, including a proposed tridimensional compacity index. It.s suggested a way of modeling and testing these relations andpresented a case study in Rio de Janeiro city, involving statistical methods applied to pollutants (SO2, CO e PI), morphological variables (ground space index and verticalization) and meteorological (wind . direction and speed - , rainfall and air temperature). Results point to gradesof influenceof the ground space index and verticalizationon concentrations of considered pollutants

Distribution of annual rainfall in homogeneous regions through data mining techniques in southern Brazil.

This study aimed to transform time series of annual data of precipitation of Rio Grande do Sul in homogeneous precipitation regions through clustering techniques (data mining).Resumo em português: Distribuição da precipitação pluvial anual em regiões homogêneas por meio de mineração de dados, no sul do Brasil. SIC 2015

Behaviour and performance of lactating sows housed in different types of farrowing rooms during summer

AbstractThirty mixed-parity Landrace×Large White sows were used to evaluate the effects of the type of farrowing room on 28-day lactation behaviour under tropical conditions during summer. The sows were allocated in a completely randomised design with three treatments with 10 replicates according to parity number and body weight, with each animal being considered an experimental unit. The treatments consisted of a conventional farrowing room (T1); a conventional farrowing room with floor cooling under the sow (T2); and a semi-outdoor farrowing room without a cage and with access to a fenced field (T3). The sows from T1 and T2 groups were exposed to mean maximum and minimum environmental temperatures of 25.7 and 21.0°C, respectively, and the sows from the T3 group to average maximum and minimum environmental temperatures of 26.5 and 20.7°C, respectively. The feed consumption of T3 sows was numerically higher than the T1 and T2 sows (+9.5% on average). The body-weight loss was influenced at 28days (P<0.10) by treatment, being that the T3 sows gained weight (+4.7kg) while the T1 and T2 sows lost weight (−11.9 and −3.7kg, respectively for T1 and T2). The T3 sows showed a higher percentual litter mortality than the T1 and T2 sows (3.2% vs. 0% vs. 7.8%, respectively for T1, T2 and T3 sows). From farrowing until day 28 of lactation, the T2 and T3 sows showed higher lactation efficiency when compared with the T1 sows (72% vs. 87% vs. 88%, respectively for T1, T2 and T3 sows). The T1 sows showed higher (P<0.01) frequencies of visits to the feeder and drinker (+38% on average). The T3 sows spent more time (P<0.01) at the drinker than T1 and T2 sows (23 vs. 23 vs. 32min, respectively for T1, T2 and T3 sows). The T3 sows showed a higher (P<0.10) frequency of nursing than the other treatments (+15% on average). T1 and T2 sows were found to spend more time (P<0.01) performing other postures during 24h than sows maintained in T3 (50 vs. 51 vs. 22min/d, respectively for T1, T2 and T3). It is concluded that cooling of the floor under the sow in the conventional farrowing room or the use of semi-outdoor farrowing rooms improves the thermal environment and the lactation efficiency of the sows housed in hot ambient temperatures at 28-day lactation in the summer period, indicating an improved welfare

Imazaquin sorption in surface and subsurface soil samples.

The objective of this work was to study the sorption and desorption of imazaquin, in surface and subsurface soil samples from Brazil. Sorption and desorption steps were carried out using batch equilibration and high performance liquid chromatography analytical routines. The value of Kf,ads was positively correlated with clay content, and negatively correlated with pH of supernatant. Samples from Typic Haplustox, clayey soil profile having high clay content, provided higher Kf,ads values, and negative correlation with organic carbon, silt content, cation exchange capacity and pH

Agroecologia: manejo de pragas e doenças de plantas.

Agroecologia é uma ciência em construção que busca modificar o curso alterado dos processos de uso e manejo dos recursos naturais, de forma a ampliar a inclusão social, reduzir os danos ambientais, fortalecer a autonomia e segurança alimentar. Sendo assim, exige dos extensionistas, agricultores e pesquisadores a modificação dos sistemas de produção que causam degradação social e ecológica. Para tanto, faz-se necessário pensar no sistema agrícola ao longo do tempo, a partir do conhecimento popular que, integrado ao conhecimento científico, poderá transformar a realidade local, melhorando, sobretudo, a qualidade de vida das pessoas

Seleção de equações para o paricá (Schizolobium amazonicum huber ex ducke), no estado de Roraima.

bitstream/item/130481/1/BP04-parica-helio.pd