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Preparation and characterization of polysaccharides/PVA blend nanofibrous membr...
Santos, Carla; Silva, Carla J.; Büttel, Zsófia; Guimarães, Rodrigo; Pereira, Sara B.; Tamagnini, Paula; Zille, AndreaA series of polyvinyl alcohol (PVA), PVA/chitosan (CS) and PVA/cyanobacterial extracellular polymeric substances (EPS) blended nanofibrous membranes were produced by electrospinning using a microfiltration poly(vinylidene fluoride) (PVDF) basal membrane, for potential applications in water filtration. Nanofibres were obtained from solutions of 20% (w/w) PVA with 1% (w/w) CS or EPS, using a weight ratio of 60/40...
Alkali and acid polysaccharides blend nanofibrous membranes prepared by electro...
Santos, Carla; Silva, Carla J.; Büttel, Zsófia; Guimarães, Rodrigo; Tamagnini, Paula; Zille, AndreaPoster apresentado no "Smart and functional coatings conference", Torino, Italy, 2013 ; Electrospinning allows the production of polymer fibres with diameters in the sub-micron size range, through the application of an external electric field, keeping intact the bulk properties of the polymers. Electrospun membranes possess some unique structural features, such as a high surface to volume ratio and very good m...
Fabrication and characterization of PVA, PVA/chitosan, and PVA/cyanobacterial e...
Santos, Carla; Silva, Carla J.; Guimarães, Rodrigo; Büttel, Zsófia; Tamagnini, Paula; Zille, AndreaApresentação efetuada no "245th ACS National Meeting and Exposition", em New Orleans, Louisiana, 2013 ; A series of poly(vinyl alcohol) (PVA), PVA/chitosan (CS) and PVA/cyanobacterial exopolysaccharide (EPS) blend nanofibrous membranes were fabricated by electrospinning using a microfiltration poly(vinylidene fluoride) (PVDF) as a basal membrane, in order to obtain thin-layer composite (TFC) nanofiltration mem...
Thin-layer nanofiltration membranes using engineered biopolymers for seawater d...
Büttel, Zsófia; Guimarães, Rodrigo; Santos, Carla; Silva, Carla J.; Pereira, Sara B.; Mota, Rita; Tamagnini, Paula; Zille, AndreaNowadays water demand already exceeds supply and water scarcity is a global problem. So it is necessary to develop novel technologies to be able to use poorer quality source waters for drinking water production. Once considered as an expensive, ultimate solution for water supply, desalination is becoming affordable. The two most commonly used seawater desalination methods are Multi-stage Flash Distillation (MSF...
Production and characterization of extracellular carbohydrate polymer from Cyan...
Mota, Rita; Guimarães, Rodrigo; Büttel, Zsófia; Rossi, Federico; Colica, Giovanni; Silva, Carla J.; Santos, Carla; Gales, Luís; Zille, AndreaCyanobacterial extracellular polymeric substances (EPS) are heteropolysaccharides that possess characteristics suitable for industrial applications, notably a high number of different monomers, strong anionic nature and high hydrophobicity. However, systematic studies that unveil the conditions influencing EPS synthesis and/or its characteristics are mandatory. In this work, Cyanothece sp. CCY 0110 was used as ...
Modulation of poly-N-acetylglucosamine accumulation within mature Staphylococcu...
Cerca, Filipe; França, Ângela; Guimarães, Rodrigo; Hinzmann, Mariana; Cerca, Nuno; Cunha, Alexandre Lobo da; Azeredo, Joana; Vilanova, ManuelPNAG is a major component of Staphylococcus epidermidis biofilms involved in intercellular adhesion as well as in the interaction of the biofilm with components of the host immune response. Synthesis of PNAG has been found to be regulated by several environmental factors. In the present study, the effect of glucose metabolism-dependent culture medium acidification in PNAG accumulation was evaluated. Established...
Sistema nacional de cultura : a tradução do dinâmico e do formal nos municípios...
Carvalho, Cristina Amelia Pereira de; Silva, Rosimeri de Fatima Carvalho da; Guimarães, Rodrigo GameiroA trajetória das políticas públicas da cultura no país, desde a era Vargas até o atual momento de institucionalização do Sistema Nacional de Cultura (SNC), evidencia a disputa entre os agentes sociais que lutam pela preservação da hegemonia de um modelo excludente e aqueles que defendem a cultura como um direito social. A construção e a instauração do Sistema pela sua própria lógica, só podem ser concretizadas ...
Estudo do tratamento das fraturas da cabeça do fêmur
Guimarães,Rodrigo Pereira; Souza,Gilliatt Saeki de; Reginaldo,Sandro da Silva; Ono,Nelson Keiske; Honda,Emerson Kiyoshi; Polesello,Giancarlo CavalliOBJETIVO: Estabelecer diretrizes para o tratamento das fraturas da cabeça femoral e determinar a melhor via de acesso nos casos tratados cirurgicamente. MÉTODOS: Avaliamos os resultados clínicos e radiográficos de 13 pacientes (13 fraturas) tratados cirurgicamente entre maio de 1986 e julho de 1996 no Departamento de Ortopedia e Traumatologia da Santa Casa de Misericórdia de São Paulo (SCMSP), Pavilhão "Fernand...
Artroplastia parcial no tratamento das fraturas do colo do fêmur
Ono,Nelson Keiske; Lima,Guilherme Didier de Andrade; Honda,Emerson Kiyoshi; Polesello,Giancarlo Cavalli; Guimarães,Rodrigo PereiraOBJETIVO: Realizar avaliação epidemiológica e clínica dos pacientes com fratura desviada do colo femoral, que foram submetidos ao tratamento cirúrgico, com artroplastia parcial do quadril cimentada. MÉTODOS: Foram avaliados, de forma retrospectiva, todos os pacientes com fratura desviada do colo do fêmur (Garden III e IV) submetidos à artroplastia parcial do quadril com prótese unipolar (Thompson), cimentada pe...
Free radical scavenging and anti-edematogenic activities of Paullinia elegans C...
Guimarães,Rodrigo N.; Truitti,Maria Conceição T.; Bersani-Amado,Ciomar A.; Formagio,Anelise S. N.; Cardoso,Flávia P.; Costa,Willian F. daEthanol extract of the leaves of Paullinia elegans Cambess., Sapindaceae, and its hexane, chloroform, ethyl acetate, and hydroethanol fractions were evaluated for their antiedematogenic and free radical scavenging activities. The ethanol extract and the hexane fraction produced statistically significant inhibition (74.4 and 76.0%, respectively) of the ear edema induced by croton oil in mice, observed at doses o...
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