Estimativas de custos de instalação e manutenção de cerca elétrica solar, como divisória de pastagem, no estado do Acre.

O elevado custo das cercas tradicionais, compostas basicamente por estacas e mourões de madeira e arame farpado, fez surgir uma crescente demanda por cercas elétricas como divisórias de pastagem, no processo de intensificação do sistema de produção. O objetivos deste estudo foi estimar o custo de instalação e manutenção de cercas elétricas divisórias de pastagem na região próxima ao município de Rio Branco, Acre, considerando-se os equipamentos disponíveis no mercado local.bitstream/CPAF-AC/3679/1/comunicado120.pd

Perdas de grãos na cultura do milho: pré-colheita, colheita, transporte e armazenamento.

Perdas na pre-colheita; Perdas na colheita; Perdas na pos-colheita; Principais pragas dos graos armazenados; Conseguencias do ataque de insetos; Formas de armazenamento e recomendacoes.bitstream/item/37533/1/circ-24.pd

Smart and sustainable cities in the Mediterranean region: The contribution of short supply chains of food

The cities around the world in general, and in the Mediterranean area in particular, are facing tremendous challenges at the environmental, social, economic, and institutional levels, due to the urbanization trend, environmental climatic changes and challenges due to the ongoing COVID-19 pandemic. Therefore, cities need to be sustainable and smart in the future. An economically important and innovative sector in urban areas is food security. Nowadays, most of the literature explores the concept of smart cities from the point of view of information and communications technology, indeed, the connection with the sustainability aspects of the food supply chain and the ways to operationalize that, remains unsolved. This paper tries to overcome this gap in the literature. The main aim is to analyze the contribution of the short supply chain of food in terms of sustainability in smart cities, regarding current urban trends in cities in general and in Mediterranean areas in particular. The methodology was based on a literature review and includes quantitative and qualitative analysis. The results confirm the existence of positive impacts in the short supply chains of food in urban areas in terms of sustainability. Despite the existence of a considerable number of papers about smart cities and ICT-related topics, the benefits from society of short supply chains of food, and the linkage among the topics and subjects, remain unreferred to or with a limited knowledge exchange. The conclusions of this paper will be helpful for public decision makers to implement policies in order to promote the sustainability of Mediterranean cities.info:eu-repo/semantics/publishedVersio

Clonagem do gene do capsídeo do Pineapple mealybug associated virus-1 para expressão de proteína e produção de antissoros.

O Pineapple Mealibug Wilt associated Virus (PMWaV - 1 a 3) é o agente etiológico de uma doença que causa perdas significativas à cultura do abacaxizeiro, denominada murcha do abacaxi. Esta doença é transmitida pela Cochonilha Dysmicoccus brevipes sempre ocorre quando o inseto infectivo se alimenta da seiva da planta

Structural modification of TiO2 nanorod films with an influence on the photovoltaic efficiency of a dye-sensitized solar cell (DSSC)

Structural modification of TiO2 nanorod films with an influence on the photovoltaic efficiency of a dye-sensitized solar cell (DSSC). Lijian Meng a,b)∗, Can Lic) and M.P. dos Santos d) a). Departamento de Física, Instituto Superior de Engenharia do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal. b). Centro de Física, Universidade do Minho, 4800-058 Guimarães, Portugal. c). State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023,China. d). CEFITEC,Faculdade de Ciências e Tecnologia,FCT,Universidade Nova de Lisboa,2829-516Caparica,Portugal/Escola de Ciências e Tecnologia,ECT,Universidade de Évora,7000-671Évora,Portugal Abstract TiO2 nanorod films have been deposited on ITO substrates by dc reactive magnetron sputtering technique. The structures of these nanorod films were modified by the variation of the oxygen pressure during the sputtering process. Although all these TiO2 nanorod films deposited at different oxygen pressures show an anatase structure, the orientation of the nanorod films varies with the oxygen pressure. Only a very weak (101) diffraction peak can be observed for the TiO2 nanorod film prepared at low oxygen pressure. However, as the oxygen pressure is increased, the (220) diffraction peak appears and the intensity of this diffraction peak is increased with the oxygen pressure. The results of the SEM show that these TiO2 nanorods are perpendicular to the ITO substrate. At low oxygen pressure, these sputtered TiO2 nanorods stick together and have a dense structure. As the oxygen pressure is increased, these sputtered TiO2 nanorods get separated gradually and have a porous structure. The optical transmittance of these TiO2 nanorod films has been measured and then fitted by OJL model. The porosities of the TiO2 nanorod films have been calculated. The TiO2 nanorod film prepared at high oxygen pressure shows a high porosity. The dye-sensitized solar cells (DSSCs) have been assembled using these TiO2 nanorod films prepared at different oxygen pressures as photoelectrode. The optimum performance was achieved for the DSSC using the TiO2 nanorod film with the highest (220) diffraction peak and the highest porosity

Stoichiometry, structure, and transport in the quasi-one-dimensional metal, Li(0.9)Mo(6)O(17)

A correlation between lattice parameters, oxygen composition, and the thermoelectric and Hall coefficients is presented for single-crystal Li(0.9)Mo(6)O(17), a quasi-one-dimensional (Q1D) metallic compound. The possibility that this compound is a compensated metal is discussed in light of a substantial variability observed in the literature for these transport coefficients.Comment: 5 pages, 4 Figures; Phys. Rev. B (in press

Análise de risco em quatro sistemas de rotação de culturas para trigo, num período de dez anos, em Passo Fundo, RS.

Made available in DSpace on 2011-04-09T17:22:15Z (GMT). No. of bitstreams: 1 pab13596.pdf: 81381 bytes, checksum: bc690154d01a8fbfbfbd2fe9a46261f6 (MD5) Previous issue date: 1999-06-0

Diagnóstico ambiental do município de Santana do Ipanema, Alagoas.

bitstream/CNPS-2010/14878/1/bpd76-2005-santana-ipanema.pd