Cupper
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Metais traço e aminas bioativas em alface proveniente da agricultura urbana
Urban agriculture is an activity being practiced in every city of the world. Its practice has provided several benefits to growers, among them, availability of fresh vegetables, source of vitamins, minerals and bioactive compounds such as polyamines, which have shown antioxidant activity. However, urban agriculture can be a risk in case the vegetables are co
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/05/2012
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2. Estudos mecanísticos da interferência de íons cobre(II) e zinco(II) na reação de Fenton / Mechanistic studies of the interference of the cupper(II) and zinc(II) ions on the Fenton reaction
O objetivo principal deste trabalho foi estudar a interferência de íons Cu2+ e Zn2+ na degradação do fenol pela reação de Fenton (Fe2+/Fe3+ + H2O2). Ambos os íons apresentaram efeito catalítico na reação de Fenton, porém atuam em etapas diferentes durante essa reação. Um dos primeiros intermediários da degradação, o catecol, é capaz de reduz
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/08/2011
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3. Nutrição mineral de bovinos de corte do Pantanal Mato-Grossense: 2. Micronutrientes na Nhecolandia (Parte Central).
Realatam-se resultados de analise de solos, agua, e gramineas nativas, coletadas em 1979, maio/80 e ago/80, e de figado de bovinos, nessas epocas e em fev/80, na sub-regiao de Nhecolandia, do Pantanal Mato-Grossense. Solos e gramineas foram coletados em cino unidades de paisagem : mata, cerrado, caronal, campo limpo e lagoa. Os resultados sugerem a possibili
Pesquisa agropecuária brasileira. Publicado em: 2011
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4. Estudo da dispersão de pigmentos orgânicos em resina de polipropileno para aplicação em fibras e filamentos / Study of dispersion of organic pigments in polypropylene resin for fiber and filaments applications
Polypropylene has become widely used in fiber and filament applications; most part of these applications use colorful pigments to satisfy aesthetic necessities, communication, identification and others. To achieve the effect of the needed color it is necessary that the pigment has been well dispersed and distribute in the polymer. The appropriate dispersion
Publicado em: 2009
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5. Avaliação do hipoclorito de sódio na severidade da ferrugem asiática, do oídio e nas características químicas da soja
Soybean [Glycine max (L) Merril] is a crop with great world economic expression due to its nutritional content and multiple usages. Its constant cultivation has lead to the development of many diseases affecting yield and quality. Powdery mildew (Erysiphe diffusa (Cooke &Peck)) and asian soybean rust (Phakopsora pachyrhizi (Syd. &P. Syd)) are among the most
Publicado em: 2009
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6. The role of phenols from bagasse vacuum pyrolysis bio-oil in cupper sulfured ore flotation
Vacuum pyrolysis bagasse bio-oil collected in a series of sequential fractions was analyzed for total percentage of phenols and levoglucosan components. It was established that the ratio total phenols- to-levoglucosan could be used as an indicator of the performance of alkaline solutions of bio-oil fractions (SABO) when they are used as foaming agents to ben
Brazilian Journal of Chemical Engineering. Publicado em: 2008-12
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7. Estudos da corrosão anisotrópica do silício frente soluções de KOH e sais metálicos. / Monocristalin silicon anisotropic etching study in KOH solution with metallic salts.
In the past few years it has been a huge evolution in industrial area of MEMS, and this one is characterized by the development of the processes of microelectronic to reduce cost and to integrate different systems that become very trustful in different applications. It is being done a work in silicon anisotropic etching in Potassium hydroxide (KOH) added wit
Publicado em: 2008
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8. Polpa de bocaiúva [Acrocomia aculeata (jacq.) Lodd.] : composição química e biodisponibilidade de carotenóides
In Central-West Brazil, where the Cerrado predominates, there are many species of native fruits considered to be sources of nutritive elements. The bocaiuva, Acrocomia aculeata (Jacq.) Lodd., is a native palm which is abundant in Mato Grosso do Sul State. Its pulp has a variable color from yellow to orange when ripe, and is consumed fresh or in the form of f
Publicado em: 2007
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9. Efeito hall planar e magnetoimpedÃncia gigante em liga ferromagnÃtica amorfa Co75Fe5Si15B10
We developed a melt-spinning to produce metallic ribbons. The system is essentially made of a radio frequency oven generating 8 kVA of 450 kHz was used to melt the compound, and a cupper used to cool down the melting
Publicado em: 2006
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10. Evaluation of carbon effect in mould fluxes for continuous casting of steel. / Avaliação do efeito do carbono em fluxantes para lingotamento contínuo de aços.
In order to assure good performance of mould flux for continuous casting of steel, the chemical composition definition is important to guarantee the properties needs to its perfect behavior in the mould. Carbon is added to the mould flux to control the melting rate, since this property is related to the availability of liquid slag to fill in the gap between
Publicado em: 2006
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11. Slow sand filter in the treatment of leachate of the sanitary landfill of Limeira -SP / Sistema de filtração lenta no tratamento de percolado do aterro sanitario de Limeira-SP
The final disposition of solids residues is a practice that still brings serious impacts to the environment. In sanitary landfill, the residues goes through physical, chemical and biological decomposition processes, generating into a gas phase (mainly composed by CH4 and CO2) and a liquid phase known as leachate. The waste leachate is a liquid with high poll
Publicado em: 2006
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12. Nitrogen and micronutrients fertilization on yield and occurrence of leaf diseases on maize / Adubação nitrogenada e de micronutrientes na produtividade e incidência de doenças foliares em milho
Doses elevadas de nitrogênio podem retardar a fase de maturação e aumentar o risco de infecção da planta devido ao tempo de exposição no campo e a predominância de substâncias de baixa massa molecular presentes no tecido. O efeito do cobre, no controle de patógenos, deve-se à pequena quantidade requerida pelos microrganismos em relação às plant
Publicado em: 2006