Extracellular Polymer
Mostrando 1-12 de 109 artigos, teses e dissertações.
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1. EFFECT OF ALUMINUM SULFATE AND CATIONIC POLYMER ADDITION IN THE MIXED LIQUOR OF A SUBMERGED MEMBRANE BIOREACTOR (SMBR): SLUDGE CHARACTERISTICS AND ORTHOPHOSPHATE REMOVAL IN BATCH EXPERIMENTS
Abstract Submerged Membranes Bioreactors (SMBR) are an established technology for wastewater treatment for water recovery and reuse. However, its routine application is still compromised by the high energy consumption to overcome the fouling effect. This study evaluated the effect of aluminum sulfate and cationic polymer in the orthophosphate removal and slu
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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2. Candida albicans BIOFILM DEVELOPMENT IN VITRO FOR PHOTODYNAMIC THERAPY STUDY / Desenvolvimento de biofilme formado por Candida albicans in vitro para estudo do efeito fotodinâmico
Photodynamic therapy (PDT) is a phototherapy based on the use of a photosensitizer (PS) in the presence of low intensity light with resonant wavelength of absorption of the PS and biological systems that can raise awareness, generating reactive oxygen species. Studies show that PDT has a lethal effect on Candida albicans. The biofilm formed by C. albicans is
Publicado em: 2009
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3. Polymeric microcapsules poduction from sodium alginic acid for cell therapy
Development of polymeric materials has been increasingly emphasized in Biomedicine. Here, we evaluate the use of microcapsules made of Biodritin®, a biocompatible polymer compound which contains sodium alginic acid, a natural polymer extracted from algae, and Cis-Chondroitin sulfate, a glycosaminoglycan from the extracellular matrix. Gelation of this polyme
Materials Research. Publicado em: 2007-12
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4. Effects of Aspergillus niger inoculum concentration upon the kinetics of starchy wastewater pretreatment in a tanks-in-series bioreactor under transitory conditions
This paper discusses the effects of three Aspergillus niger inoculum concentrations (0.12, 2.3 and 3.6 g/l) upon the kinetics of starch pretreatment under aerobic and transitory conditions using a tanks-in-series reactor. A synthetic wastewater containing starch as model polysaccharide was fed into the reactor system to study this polymer transformation by A
Brazilian Journal of Chemical Engineering. Publicado em: 2007-12
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5. Polímeros extracelulares insolúveis (EPS) nos reatores anaeróbios operados em bateladas seqüenciais: caracterização e fatores que favorecem a produção / Insoluble exopolysaccharides (EPS) in the anaerobic sequential batch biofilm reactor: characterization and factors that enhance the production
The insoluble exopolysaccharides (EPS) produced in anaerobic treatment processes from some kinds of wastewater are unwelcome due to operational problems that it may cause, making the process unfeasible most of times. The anaerobic sequential batch biofilm reactor (ASBBR), containing immobilized biomass, is a new configuration of reactor that has been studied
Publicado em: 2006
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6. Avaliação da produção de exopolissacarideo insoluvel por duas linhagens de Agrobacterium sp
Some bacteria of Agrobacterium genus isolated from soil samples and not pathogenic produce two extracellular polysaccharides: an acid and soluble succinoglycan and curdlan gum, an insoluble and neutral polymer. The last one, which received the approval of the FDA - Food and Drug Administration - USA - in 1996, is usually used in food industry because of its
Publicado em: 2002
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7. A fucan from the brown seaweed Spatoglossum schröederi inhibits Chinese hamster ovary cell adhesion to several extracellular matrix proteins
Fucans, a family of sulfated polysaccharides present in brown seaweed, have several biological activities. Their use as drugs would offer the advantage of no potential risk of contamination with viruses or particles such as prions. A fucan prepared from Spatoglossum schröederi was tested as a possible inhibitor of cell-matrix interactions using wild-type Ch
Brazilian Journal of Medical and Biological Research. Publicado em: 2001-05
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8. Critical-Point Drying: Rapid Method for the Determination of Bacterial Extracellular Polymer and Surface Structures
The relative amount of extracellular polymer which remains about Azotobacter vinelandii, Zoogloea ramigera, Klebsiella pneumoniae, and Diplococcus pneumoniae after critical-point drying was studied by electron microscopy. The results obtained with this technique are compared to those obtained with methods that illustrate extracellular polymer, such as freeze
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9. Production of Extracellular Polysaccharide Matrix by Zoogloea ramigera
Zoogloea ramigera 115 synthesized large amounts of matrix polymer from fructose, galactose, glucose, lactose, mannose, soluble starch, and sucrose when these carbohydrates were used as supplements to a chemically defined medium. All of them supported polymer synthesis to the extent that cultures thickened to a gel. Concentration of carbohydrate nutrients in
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10. Comparison of Bacterial Extracellular Polymer Extraction Methods
Five different bacterial extracellular polymer extraction methods and a combination of two of these methods were compared on cultures of activated sludge, synthetic activated sludge, and Klebsiella aerogenes. High-speed centrifugation was the most effective extraction method for the K. aerogenes culture, based on the comparatively small amount of cell disrup
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11. Characterization of a Sinorhizobium Isolate and Its Extracellular Polymer Implicated in Pollutant Transport in Soil
A bacterium isolated from soil (designated 9702-M4) synthesizes an extracellular polymer that facilitates the transport of such hydrophobic pollutants as polynuclear aromatic hydrocarbons, as well as the toxic metals lead and cadmium in soil. Biolog analysis, growth rate determinations, and percent G+C content identify 9702-M4 as a strain of Sinorhizobium me
American Society for Microbiology.
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12. Production and Characterization of a Polymer from Arthrobacter sp
An Arthrobacter sp. isolated from a glucose-sucrose agar plate was found to produce a neutral, extremely viscous, opalescent extracellular polymer. Growth, polymer production, and rheological properties and chemical composition of the isolated polymer were examined. The polymer was found to be substantially different from other arthrobacter polymers. Some un