Cenários e ações na pesquisa federal em agricultura orgânica no Brasil

bitstream/CNPAB-2010/35702/1/doc257.pd

An insulation thickness optimization methodology for school buildings rehabilitation combining artificial neural networks and life cycle cost

The energy efficiency of buildings, including public buildings, is a major concern for all European governments, since they are responsible for a large share of the total energy bill of the states. School buildings play an important role in these costs. The best strategy for reversing this scenario includes efforts on buildings retrofit, seeking to optimize their energy efficiency and indoor environmental quality. However, in the unfavourable economic climate we are experiencing, which requires great prudence when it comes to public investment, special attention should be given to this multi-objective optimization process. In this research, a methodology to optimize the insulation thickness of the external walls and roof on school buildings retrofit is proposed. The procedure includes the optimization of the building performance considering the following objectives: the minimization of the annual heating load; the minimization of the discomfort in the classrooms due to overheating; and the minimization of the life cycle cost of retrofitting external walls and roof. This methodology was applied to two Portuguese school buildings

Diagnóstico rápido participativo no Território de Identidade Recôncavo, na Comunidade de Piabas - Cruz das Almas, BA.

O Diagnóstico Rápido Participativo, junto à comunidade de Piabas - Cruz das Almas, BA, no Território de Identidade Recôncavo, apontou os problemas relevantes e limitadores do desenvolvimento local sustentável. O projeto tem como foco a implantação de sistema agroflorestal, por meio de ferramentas de DRP na comunidade de Piabas - Cruz das Almas, BA. Realizou-se a avaliação do DRP efetuado em maio de 2009 que levantou os problemas locais como pragas em culturas agrícolas, cursos ou treinamento em enxertia e manejo de solo, nova cultivar de aipim, escoamento dos produtos e manejo da terra sem mecanização. As principais culturas agrícolas são citrus, feijão, milho, mandioca, fumo, batata-doce e amendoim. A região está localizada nos Tabuleiros Costeiros e as propriedades possuem solos com boa profundidade. Este trabalho tem como objetivo conhecer e avaliar problemas e apontar oportunidades de desenvolvimento local através de alternativas de produção, de inclusão social, aumento de renda e sustentabilidade do produtor de base familiar, através da introdução de frutífera perenes e da cultura do nim indiano (Azadirachta indica), como fonte de energia e matéria prima para controle de pragas na agropecuária.PDF.029

Propagating Torsion in 3D-Gravity and Dynamical Mass Generation

In this paper, fermions are minimally coupled to 3D-gravity where a dynamical torsion is introduced. A Kalb-Ramond field is non-minimally coupled to these fermions in a gauge-invariant way. We show that a 1-loop mass generation mechanism takes place for both the 2-form gauge field and the torsion. As for the fermions, no mass is dynamically generated: at 1-loop, there is only a mass shift proportional to the Yukawa coupling whenever the fermions have a non-vanishing tree-level mass.Comment: 13 pages, latex file, no figures, some corrections adde

Star-Shaped Gold Nanoparticles as Friendly Interfaces for Protein Electrochemistry: the Case Study of Cytochrome c

UID/QUI/50006/2019 POCI‐01‐0145‐FEDER‐007265 UID/Multi/04378/2019 POCI‐01‐0145‐FEDER‐007728 PTDC/NAN‐MAT/30589/2017 grant NORTE‐01‐0145‐FEDER‐000011 SFRH/BD/132057/2017Gold nanostars with an average tip-to-tip length of 52±6 nm were functionalized with different capping agents and used as electrode modification materials for protein electrochemistry. Direct electron transfer between cytochrome c and nanostar-coated pyrolytic graphite electrodes was observed with the protein in solution. The electrochemical response was improved at nanostars functionalized with a 1 : 1 mixture of 11-mercaptoundecanoic acid and 4-mercaptobenzoic acid in comparison with gold nanospheres coated with a similar functionalization. Further immobilization of cytochrome c on pyrolytic graphite while conjugated with the same nanostars guaranteed the maintenance of the protein's native properties, whereas direct adsorption on the bare or nanostar-modified electrodes resulted in an altered conformational state. The pseudo-peroxidase activity of the altered cytochrome c was enhanced in the presence of the nanostars.publishe

Interação entre silício e bioindutores via foliar na supressão de brusone em plantio direto de arroz em rotação com soja.

O uso de silício na adubação tem mostrado inúmeros benefícios, incluindo aumentos na produtividade e na resistência contra pragas e doenças. Com o objetivo determinar o efeito da adubação de silicato de cálcio e magnésio, e sua interação com plantas pulverizadas com rizobactérias, um experimento foi realizado na Embrapa Arroz e Feijão, em sistema de plantio direto em rotação com soja.Pôster - pós-graduação

Supressão de brusone com o uso de silício e bioindutores via semente, no plantio direto de arroz em rotação com soja.

Este trabalho teve como objetivo comparar o efeito da adubação com silicato de cálcio e magnésio, aplicada no plantio da soja versus a aplicada no plantio do arroz e determinar a interação entre adubação silicatada e bioindutores aplicados via semente.Pôster - pós-graduação

Homogeneous and heterogenised new gold C-scorpionate complexes as catalysts for cyclohexane oxidation

Gold(III) complexes of type [AuCl2{eta(2)-RC(R'pz)(3)}]Cl [R = R' = H (1), R = CH2OH, R' = H (2) and R = H, R' = 3,5-Me-2(3), pz = pyrazol-1-yl] were supported on carbon materials (activated carbon, carbon xerogel and carbon nanotubes) and used for the oxidation of cyclohexane to cyclohexanol and cyclohexanone, with aqueous H2O2, under mild conditions

Microbiological quality and physicochemical characterization of Brazilian bee pollen

Bee Research Association. Sixty-two commercial samples of dehydrated bee pollen (Apis mellifera bees) collected in Brazil (eight states and the Federal District) were analyzed for commercial quality (moisture, ash, lipids, proteins, and carbohydrates), and hygiene (aerobic mesophiles, yeasts and molds, coliforms, Escherichia coli, Staphylococcus aureus and sulfite-reducing Clostridium). The analyzed samples were within the regulatory limits established by the legislation for ash, lipid and protein, except for moisture content. The analyzed hygiene parameters evaluated for bee pollen are not regulated by the Brazilian legislation, and the data discussed can contribute to regulatory agencies. Only moderate and weak correlations were observed between dehydrated pollen samples and the parameters evaluated.This work was supported by the Sa˜o Paulo Research Foundation (FAPESP) [grant number 2009/52163–5]; Coordination for the Improvement of Higher Education Personnel (CAPES).info:eu-repo/semantics/publishedVersio

Sorghum intercropped with Piatã Grass in eucalyptus sub-forest.

The objective of this study was to evaluate the behavior of forage sorghum when intercropped with piatã grass and cultivated in eucalyptus sub-forest. The experiment was carried out at the Embrapa Gado de Corte, in Campo Grande - MS. The experimental design was a randomized complete block design with three replications. The main treatments were: monoculture (single sorghum); intercropping (simultaneous sowing of sorghum + piatã grass). The secondary treatments were composed by the sampling sites, with five sites equidistant between the rows of eucalyptus trees (CLFI), with full sun as a control (CLI). The percentage of shading was always higher than 30% in the sub-forest, and the overall average of the system with 63% shade, even after 50% thinning of eucalyptus trees. The intercropping with the grass, an interesting fact, did not affect sorghum grain yield, since it validates the potential of forage sorghum for use in intercropping with perennial grasses, with average grain yield of 2,404.63 kg ha-1. Regarding the sampling sites, it was observed a higher yield in the full sun with 3,283 kg ha-1. The weight of 100 grains was higher for sorghum in monoculture. On the other hand, the upper W1000 was observed at sites A and C. The weight of 1000 grains is considered stable, being affected only under conditions of stress during grain formation. The sorghum intercropped with the piatã grass did not influence the harvest index (HI), while in the shaded environment there was an increase in the harvest index in relation to the full sun