Expansion Of Membranes
Mostrando 1-12 de 60 artigos, teses e dissertações.
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1. Regenerated Cellulose Membrane from Peanut Shell for Biodiesel Purification
Biodiesel purification by water washing has been proved to be an unattractive process from an economic and environmental point of view. In this work, we propose the use of regenerated cellulose membranes from peanut shell as an alternative in the biodiesel purification. The preparation of the membranes was optimized from a central composite design, resulting
J. Braz. Chem. Soc.. Publicado em: 2020-05
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2. Diabetic nephropathy
Diabetic nephropathy is the leading cause of chronic renal disease and a major cause of cardiovascular mortality. Diabetic nephropathy has been categorized into stages: microalbuminuria and macroalbuminuria. The cut-off values of micro- and macroalbuminuria are arbitrary and their values have been questioned. Subjects in the upper-normal range of albuminuria
Publicado em: 2010
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3. Mortalidade infantil em Londrina (PR) em anos recentes : características e percepções de gestores e profissionais de saúde
Infant mortality reaches a population group of liveborn infants younger than one year of age, who are vulnerable to life conditions, both to intra and extra-uterine environments. Knowing the causes of deaths and factors associated to them may provide valuable information to health care providers for improving health care. Therefore, this study had two approa
Publicado em: 2010
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4. Geometria, Topologia e Elasticidade: aplicações a membranas e outros sistemas bidimensionais
Geometry, topology and elasticity are found in various branchs of physics and they play important roles in the understanding of many physical phenomena. In this work, we present three diferent systems where we can see such importance. First, a quantum neutral particle, constrained to move on a conical surface, is used as a toy model to explore bound states d
Publicado em: 2009
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5. Microscopia eletrÃnica de varredura do endosperma do cafà (Coffea arabica L.) durante o processo de secagem / Scanning electronic microscopy in the endosperm of coffee (Coffea arabica L.) during the drying process.
After harvesting the type of processing and drying method used and the storage conditions contribute to the final drinking quality of coffee. The maintenance of the integrity of the cellular membranes, among other events, is a strong indicator that the quality of the coffee was preserved after harvesting. Therefore, this work aimed to analyze the effect of d
Publicado em: 2007
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6. ANÁLISE NUMÉRICA E EXPERIMENTAL DO COMPORTAMENTO DE EXPANSORES DE PELE SOBRE BASE ELÁSTICA / NUMERICAL AND EXPERIMENTAL ANALYSIS OF THE BEHAVIOR OF SKIN EXPANDERS ON ELASTIC FOUNDATION
Despite the knowledge of the behavior of structures on elastic base being important for the engineering of general form, the motivation of this work is focused in the Biomechanics, in our works involving the group of research of the Clinic of the Dr.Ivo Pitanguy and the Saint Casa de Misericórdia. In recent thesis of Dsc., a modeling of the surgical techniq
Publicado em: 2006
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7. Structural and magnetic properties in arrays of Ni and Co nanowires / Propriedades estruturais e magneticas de nanofios de Ni e Co
Arrays of magnetic nanowires have attracted considerable interest, mainly motivated by their use as model systems and by possible applications in high-density magnetic information storage. The macroscopic magnetic behavior of such systems is strongly dependent on the effective magnetic anisotropy (mainly determined by shape and crystalline contributions). In
Publicado em: 2006
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8. Caracterização de genes de Arabidopsis thaliana e Saccharum spp envolvidos na resposta ao frio e oxido nitrico
Nitric oxide (NO) is a reactive nitrogen species relatively unstable that has great versatility. NO acts as a secondary messenger and may be even cytotoxic, depending on its concentration. Actions of the NO as secondary messenger have been described in neurotransmission, regulation of the blood circulation and inflammatory processes mainly in mammals where t
Publicado em: 2004
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9. Spinning process variables and polymer solution effects in the die-swell phenomenon during hollow fiber membranes formation
During hollow fiber spinning many variables are involved whose effects are still not completely clear. However, its understanding is of great interest because the control of these variables may originate membranes with the desired morphologies and physical properties. In this work, the phase inversion process induced by the immersion precipitation technique
Brazilian Journal of Chemical Engineering. Publicado em: 2000-12
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10. ANÁLISIS NUMÉRICA DE MEMBRANAS Y BIOMEMBRANAS VISCOELÁSTICAS SUBMETIDAS A EXPANSIÓN ASIMÉTRICA / ANÁLISE NUMÉRICA DE MEMBRANAS E BIOMEMBRANAS VISCOELÁSTICAS SUBMETIDAS À EXPANSÃO AXISSIMÉTRICA / NUMERICAL ANALYSIS OF VISCOELASTIC MEMBRANES AND BIOMEMBRANES SUBJECTED TO AXIALLY-SYMMETRIC EXPANSION
Tissue expansion is a well-known plastic surgery technique, based on the ability of biologic membranes to increase its surface area when a deformation is imposed. It is used to repair a wound area (scars, burns), to remove tattoos, in breast reconstruction, etc. This involves inserting a silicon-rubber prosthesis (expander) in its collapsed state under the s
Publicado em: 1999
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11. Membrane skeleton restraint of surface shape change during fusion of erythrocyte membranes: evidence from use of osmotic and dielectrophoretic microforces as probes.
The role of the spectrin-based membrane skeleton in cell fusion was studied by following the condition-dependent diameter versus time expansion signature of the fusion zone in electrofused pairs of erythrocyte ghost membranes. Previous work showed that the presence of the dielectrophoresis-inducing alternating electric field, which is used to bring membranes
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12. Pulmonary Surfactant Protein SP-C Counteracts the Deleterious Effects of Cholesterol on the Activity of Surfactant Films under Physiologically Relevant Compression-Expansion Dynamics
The presence of cholesterol is critical in defining a dynamic lateral structure in pulmonary surfactant membranes. However, an excess of cholesterol has been associated with impaired surface activity of surfactant. It has also been reported that surfactant protein SP-C interacts with cholesterol in lipid/protein interfacial films. In this study, we analyzed
The Biophysical Society.