638 research outputs found
Estimation of genetic parameters and verification of early selection efficiency in baru (Dipteryx alata).
This study aimed at verifying the efficiency of early selection, and estimating the genetic parameters in Dipteryx alata. The 66 half-sib families were obtained from three seed provenances at the Brazilian Savannah of the state of Minas Gerais. The experiment was carried out in a randomized block design with 3 replications and 5 plants per plot. Data diameters at breast height (DBH) and total height (TH) were taken at the ages of 64, 125 and 138 months. REML/BLUP methodology was applied in the D. alata different provenances and progenies. Analysis indicated significant genetic variability (P < 0.01) between and within provenances. Both traits, DBH and TH, presented high narrow sense heritability for the ages analyzed. High genetic correlation occurred between DBH and TH traits, and between ages (age-age); thus, it allowed indirect selection, as well as early selection with high genetics gains
AKAP79/150 Anchoring of Calcineurin Controls Neuronal L-Type Ca2+ Channel Activity and Nuclear Signaling
SummaryNeuronal L-type calcium channels contribute to dendritic excitability and activity-dependent changes in gene expression that influence synaptic strength. Phosphorylation-mediated enhancement of L-type channels containing the CaV1.2 pore-forming subunit is promoted by A-kinase anchoring proteins (AKAPs) that target cAMP-dependent protein kinase (PKA) to the channel. Although PKA increases L-type channel activity in dendrites and dendritic spines, the mechanism of enhancement in neurons remains poorly understood. Here, we show that CaV1.2 interacts directly with AKAP79/150, which binds both PKA and the Ca2+/calmodulin-activated phosphatase calcineurin (CaN). Cotargeting of PKA and CaN by AKAP79/150 confers bidirectional regulation of L-type current amplitude in transfected HEK293 cells and hippocampal neurons. However, anchored CaN dominantly suppresses PKA enhancement of the channel. Additionally, activation of the transcription factor NFATc4 via local Ca2+ influx through L-type channels requires AKAP79/150, suggesting that this signaling complex promotes neuronal L channel signaling to the nucleus through NFATc4
Recommended from our members
Three Dimensional Printing of Tungsten Carbide-Cobalt Using a Cobalt Oxide Precursor
Tungsten Carbide 10 wt% Cobalt parts were formed by Slurry-based Three
Dimensional Printing (3DPTM). The slurry contained a mixture of Tungsten Carbide and
Cobalt Oxide powders, as well as dispersing and redispersing agents. The cobalt oxide is
fully reduced to cobalt metal during the early stages of the sintering process. A new binder
system, polyethylenimine, is described for use with powders with acidic surfaces, such as
WC. Sintered densities approach the theoretical values for WC-10% Co, and the
microstructures produced are similar to those of conventionally processed (press and sinter)
materials. Up to four parts were produced in a single print run using a layer thickness of 25
Pm, with good dimensional agreement between them, and within the range of target
dimensions after sintering.Mechanical Engineerin
THE FACE OF IMMIGRATION IN THE NORTH OF PORTUGAL
This study seeks to understand the consequences of this phenomenon in the relocation of human resources from other countries to Portugal and to evaluate the impact of immigrants in northern Portugal, including help to clarify the mechanisms for determining the measures of economic policy (sectors most wanted, integration,
interactions in organizations). With decolonization and later integration into the European Union, the social and cultural fabric has undergone profound changes. Portugal has become a host country.info:eu-repo/semantics/publishedVersio
Avaliação clonal para identificação de matrizes promissoras de cupuaçuzeiro (Theobroma grandiflorum).
O cupuaçuzeiro, Theobroma grandiflorum (Willd. ex Spreng.) Schumm., é uma fruteira que, apesar da importância econômica que representa para a economia da região amazônica, sendo a segunda espécie frutícola mais importante com cerca de 10% do mercado de todas as frutas, ainda depende de ajustes no seu sistema produtivo. Entre as carências de pesquisa destaca-se a necessidade de materiais de plantação. Este trabalho teve por objetivo avaliar um conjunto de genótipos de cupuaçuzeiro, a fim de selecionar materiais promissores para o programa de melhoramento genético. O experimento foi conduzido em parceria com um produtor rural do município de Tomé Açu, no período de 2006 a 2011. A análise dos resultados do desenvolvimento vegetativo de todos os 25 clones, nos anos de 2006 a 2007, demonstrou que altura média das plantas foi de 1,6 m e o diâmetro do tronco ficou em 3,4 cm. Em relação ao número de frutos, a média do experimento, cresceu lentamente nas três primeiras safras, até atingir, na safra 2010/2011, a produção de 17,6 frutos/planta/safra. Dos 10 clones procedentes da fazenda do Sr. Inada, 8 (clones 7, 9, 6, 8, 10, 4, 11 e 5) encontram-se no grupo dos mais produtivos. Vale ressaltar que as cultivares Coari (174), Codajás (186) e Manacapuru (215) também fizeram parte desse seleto grupo. Nenhum clone foi afetado pela vassoura de bruxa nessa primeira etapa de avaliação.PIBIC-2011
Conservation Laws in Higher-Order Nonlinear Optical Effects
Conservation laws of the nonlinear Schr\"{o}dinger equation are studied in
the presence of higher-order nonlinear optical effects including the
third-order dispersion and the self-steepening. In a context of group theory,
we derive a general expression for infinitely many conserved currents and
charges of the coupled higher-order nonlinear Schr\"{o}dinger equation. The
first few currents and charges are also presented explicitly. Due to the
higher-order effects, conservation laws of the nonlinear Schr\"{o}dinger
equation are violated in general. The differences between the types of the
conserved currents for the Hirota and the Sasa-Satsuma equations imply that the
higher-order terms determine the inherent types of conserved quantities for
each integrable cases of the higher-order nonlinear Schr\"{o}dinger equation
The Ubiquitous Inflaton in String-Inspired Models
A string theory based inflationary model is developed where the inflaton
interacts with a multitude of massive string level states causing dissipation
of vacuum energy. Inflation terminates in a warm Universe without the need for
reheating.Comment: In Press Physical Review Letters 1999, modified titl
Geoestatística aplicada aos atributos físicos e químicos do solo relacionados com a produção da cultura da soja.
A combinação de dados espacialmente distribuídos da produção agrícola, como os de produtividade e atributos do solo, constitui importante ferramenta de diagnóstico para uso mais eficiente das informações, possibilitando melhor manejo da variabilidade no campo. O objetivo do presente trabalho foi analisar a variabilidade espacial dos atributos físicos e químicos do solo e da produtividade da soja por meio da análise geoestatística, com o intuito de colaborar com a avaliação da qualidade do solo no Município de Campinas, SP. Os dados foram obtidos por meio de amostragem em 50 pontos georreferenciados: atributos físicos (densidade do solo e infiltração de água no solo) e químicos (pH, soma de bases e saturação por bases) e a produtividade da soja foram submetidos à análise de dependência espacial. A análise geoestatística possibilitou a identificação da variabilidade espacial de alguns atributos físicos e químicos do solo e da produtividade de soja. Mapas de isolinhas permitiram estabelecer relações entre os atributos físicos e químicos do solo. Houve semelhanças quanto aos locais de melhor fertilidade do solo em relação aos valores de pH e saturação por bases de 10-20 cm e maiores valores de produtividade da soja. Em relação aos atributos físicos, esta relação não foi detectada espacialmente
- …