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Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Mechanical behavior of PVD coatings deposited on ADI
ABSTRACT In this work, the mechanical behavior of the coated ADI system is studied. For this purpose, single layer Ti and bilayer Ti/TiN and TiAl/TiAlN coatings, with different thicknesses, were deposited by the PVD technique of cathodic arc deposition on high strength ADI substrates using industrial and experimental devices. The characterization of the coat
Matéria (Rio J.). Publicado em: 25/11/2019
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2. A novel voltage-mode CMOS quaternary logic design
This brief presents a novel kind of voltage-mode CMOS design that uses multiple threshold voltage transistors and three power supply lines to implement quaternary logic gates, showing lower power dissipation and using less area than the present voltage-mode quaternary circuits. Inverter, NMIN, and NMAX gates are simulated with the Spice tool using TSMC 0.18-
Publicado em: 2011
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3. Nitrogen release in different soils and growing seasons under organic fertilization / Liberação de nitrogênio em diferentes solos e épocas de cultivo sob adubação orgânica
Os adubos orgânicos promovem melhorias nas propriedades do solo e são importantes no fornecimento equilibrado de nutrientes às plantas. Os parâmetros oficiais adotados pela Comissão de Química e Física do Solo dos Estados do Rio Grande do Sul Santa Catarina para calcular a quantidade de adubo orgânico, são a sua composição média e o índice de ef
Publicado em: 2010
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4. MudanÃas na matÃria orgÃnica (c, n e p) de solos sob agricultura de subsistÃncia.
A produtividade em sistemas agrÃcolas de subsistÃncia ou de baixos insumos depende do fornecimento de nutrientes provenientes da mineralizaÃÃo da matÃria orgÃnica do solo (MOS). Os poucos resultados disponÃveis na literatura tÃm mostrado declÃnios na fertilidade de solos sob este sistema de exploraÃÃo, particularmente nos teores de MOS. Objetivand
Publicado em: 2007
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5. Atividade invertásica de células intactas de levedura (Saccharomyces cerevisiae) obtidas por cultivo contínuo / Invertase activity of intact yeast cells (Saccharomyces cerevisiae) attained form continuos culture
Mediu-se a atividade invertásica de células intactas de levedura (S. cerevisiae) cultivadas por processo contínuo em meio preparado a partir de melaço de cana-de-açúcar, nas seguintes condições: a) aerobiose, com adição de nutrientes ao meio D(h-1): 0,10 e 0,24 Φ (l/l.min): 1 e 2 N(min-1): 500 e 700 b) aerobiose, sem adição de nutrientes ao
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/04/1986
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6. Parameters of bacterial killing and regrowth kinetics and antimicrobial effect examined in terms of area under the concentration-time curve relationships: action of ciprofloxacin against Escherichia coli in an in vitro dynamic model.
Although many parameters have been described to quantitate the killing and regrowth of bacteria, substantial shortcomings are inherent in most of them, such as low sensitivity to pharmacokinetic determinants of the antimicrobial effect, an inability to predict a total effect, insufficient robustness, and uncertain interrelations between the parameters that p
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7. A low resolution model for the chromatin core particle by neutron scattering
Neutron scattering studies have been applied to chromatin core particles in solution, using the contrast variation technique. On the basis of the contrast dependance of the radius of gyration and the radial distribution function it is shown that the core particle consists of a core containing most of the histone around which is wound the DNA helix,following
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8. Net effect of inoculum size on antimicrobial action of ampicillin-sulbactam: studies using an in vitro dynamic model.
To examine the predictable effect of inoculum size on the kinetics of the antimicrobial action of ampicillin-sulbactam, five TEM-1 beta-lactamase-producing Escherichia coli strains were studied in an in vitro dynamic model at two different initial inocula (N0S). All bacteria were exposed to ampicillin-sulbactam in a simulated system reflecting the pharmacoki