867 resultados para Coco - Refrigeração


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Different growing media were compared as to water adsorption and water loss, at Jaboticabal, SP, Brazil, through a three-year period. The objective was to recommend substrates other than tree fern fiber for cultivation of epiphytic orchids. Two treatments of each substrate were used in each sampling: materials stored in laboratory (without use) and materials exposed to conditions of orchid cultivation under laths (used). Generally, the substrates without use adsorbed less water than used substrates. When materials without use were compared, the tree fern fiber retained initially the greatest quantity of water and the blocks of pressed coconut bark, the smallest. However, these blocks gained a great capacity of water adsorption after being used. Charcoal added to the growing media did not cause significant alterations in the studied characteristics. In terms of water relations, the best growing media to substitute the tree fern fiber were composed by blocks of pressed coconut bark or by mixtures of this material with charcoal or Eucalyptus grandis bark. Bark of E grandis alone or in mixture with charcoal did not give good results.

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This chapter deals with the cellulose produced by the Glucanacetobacter xylinus strain, called bacterial cellulose, which is a remarkably versatile biomaterial usable in wide variety of domains, such as papermaking, optics, electronics, acoustics, and biomedical devices. Its unique structure shows entangled ultrafine fibers, which provide excellent mechanical strength, besides biodegradability, biocompatibility, high water-holding capacity, and high crystallinity. Some of its applications are described, such as complementary nutrition (. nata de coco), artificial temporary skin for wounds and burns, dental aid, artificial blood vessels and micronerve surgery, DNA separation, composite reinforcement, electronic paper, light emitting diodes, and fuel cell membranes. © 2007 Elsevier Ltd. All rights reserved.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Pós-graduação em Agronomia (Agricultura) - FCA

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Engenharia e Ciência de Alimentos - IBILCE

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Pós-graduação em Engenharia e Ciência de Alimentos - IBILCE

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Engenharia Mecânica - FEIS

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Pós-graduação em Engenharia Mecânica - FEIS

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)