Bacterial Polysaccharides
Mostrando 1-12 de 185 artigos, teses e dissertações.
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1. OPTIMIZATION OF BIOFLOCCULANT PRODUCTION BY Bacillus spp. FROM SUGARCANE CROP SOIL OR FROM SLUDGE OF THE AGROINDUSTRIAL EFFLUENT
Abstract Biological flocculants are advantageous due to their biodegradability and safety to living beings. In this work, four bacterial strains, isolated from sugarcane cropped soil (Bacillus megaterium LBPMA-APFSG3Isox and B. toyonensis LBPMA-ACOPR1.Isox) and sludge of an agroindustrial effluent (B. pumilus LBPMA-BLD07 and B. thuringiensis LBPMA-EFIII), we
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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2. Residual polysaccharides from fungi reduce the bacterial spot in tomato plants
Abstract Polysaccharides from fungal wastes were partially characterized and evaluated for their protective effects against bacterial spot caused by Xanthomonas gardneri on four tomato cultivars: Santa Cruz Kada, Natália, BRS Sena and Forty. The polysaccharides were extracted from spent mushroom substrate of Pleurotus ostreatus, residual brewery yeast (Sacc
Bragantia. Publicado em: 22/03/2018
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3. Heparan sulphate, its derivatives and analogues share structural characteristics that can be exploited, particularly in inhibiting microbial attachment
Heparan sulphate (HS) and the related polysaccharide, heparin, exhibit conformational and charge arrangement properties, which provide a degree of redundancy allowing several seemingly distinct sequences to exhibit the same activity. This can also be mimicked by other sulphated polysaccharides, both in overall effect and in the details of interactions and st
Brazilian Journal of Medical and Biological Research. Publicado em: 2012-05
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4. Estrutura populacional, características fenotípicas e variabilidade do lócus de síntese do polissacarídeo capsular de amostras de Porphyromonas gingivalis. / Population structure, phenotypic characteristics and variability of locus of synthesis of the capsular polysaccharide of Porphyromonas gingivalis samples.
Porphyromonas gingivalis é um dos principais organismos associados à periodontite crônica e apresenta intensa diversidade, que poderia refletir em sua virulência. A maioria dos estudos sobre a virulência de P. gingivalis foi realizada com cepas de referência, e pouco se conhece sobre este aspecto em isolados clínicos. A capacidade de indução de absc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2011
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5. Cultivo contínuo de Streptococcus pneumoniae sorotipo 14: metabolismo e cinética de produção de polissacarídeo capsular. / Continuous cultivation of Streptococcus pneumoniae serotype 14: metabolism and kinetics of capsular polysaccharide production.
O polissacarídeo capsular (PS) é o principal fator de virulência do S. pneumoniae e é a base para sua classificação em sorotipos. O objetivo deste trabalho foi estudar o metabolismo de S. pneumoniae sorotipo 14 em cultivo contínuo e, para tanto, foi desenvolvido um ELISA de captura para quantificação do PS produzido (PS14) e a melhor cepa produtora
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/06/2011
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6. Desenvolvimento e validação de um modelo de crescimento de biofilmes de S. mutans e estudo do efeito da sacarose na expressão de gtfBCD e dexA em biofilmes dentais formados in vitro e in situ / Development and validation of S. mutans biofilm growth model and study of effect of sucrose on gene expression of gtfBCD and dexA in dental biofilms formed in vitro and in situ
In vitro and in situ models have been developed to study dental biofilms. Protocols, that simulate the alternations of "feast or famine" episodes that happen in oral environment in the presence of dietary carbohydrates and allowing dental caries evaluation, are necessaries. On the other hand, few studies about gene expression of dental biofilm formed in situ
Publicado em: 2010
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7. Desenvolvimento de uma formulação cólon específica visando o tratamento da colite ulcerativa
Micro and nanoparticulate systems as drug delivery carriers have achieved successful therapeutic use by enhancing efficacy and reducing toxicity of potent drugs. The improvement of pharmaceutical grade polymers has allowed the development of such therapeutic systems. Microencapsulation is a process in which very thin coatings of inert natural or synthetic po
Publicado em: 2009
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8. Efeito do xilitol em pastilhas na composição do biofilme dental e na desmineralização e remineralização do esmalte / Effect of xylitol mints in the dental biofilm composition and in the enamel demineralization and remineralization
In spite of the existing knowledge about xylitol, its effect on the development of dental caries is still a subject that requires further clarifications. Thus, this randomized, double-blind, crossover in situ study aimed at assessing the effect of xylitol mints in the dental biofilm composition and in the processes of enamel demineralization and remineraliza
Publicado em: 2007
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9. Polissacarídeos extracelulares e atividade enzimática das glicosidases no reservatório de Barra Bonita, SP, Brasil.
Release of extracellular polysaccharides can occur from healthy and active cells and has been demonstrated to be an important carbon source for bacteria. In eutrophic environments where large blooms are formed by efficient extracellular polysaccharide producers such as Microcystis aeruginosa and Anabaena spiroides, these organic materials (high molecular wei
Publicado em: 2006
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10. Especificidade em associações alga/bactéria vinculadas aos carbidratos excretados por três espécies fitoplanctônicas de um reservatório tropical eutrófico do Estado de São Paulo (Barra Bonita).
The release of carbohydrates by phytoplankton has been extensively studied because of its ecological significance. Bacterioplankton is a group of organisms that is able to use extracellular phytoplanktonic carbohydrates, as many authors have demonstrated. The aim of this thesis was to identify specific associations algae/bacteria in the planktonic environmen
Publicado em: 2003
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11. Potencial cariogenico "in vitro" de estreptococos grupo mutans da cavidade bucal e seu significado em relação a carie dentaria
In order to analyze the cariogenic potential of some group mutans streptococci species, isolated and in association, by formation of "in vitro" bacterial plaque, production of extracellular polysaccharides and acid production capacity, strains of those microorganisms belonging to the microbial collection of Microbiology and Immunology Laboratory, Dental Scho
Publicado em: 1998
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12. Bacterial Polysaccharides: II. Laboratory-scale Production of Polysaccharides by Species of Xanthomonas12