Saltar para:
Logótipo
Comuta visibilidade da coluna esquerda
Você está em: Início > Publicações > Visualização > Biofouling control using microparticles carrying a biocide

Biofouling control using microparticles carrying a biocide

Título
Biofouling control using microparticles carrying a biocide
Tipo
Artigo em Revista Científica Internacional
Ano
2010
Autores
C. Ferreira
(Autor)
Outra
A pessoa não pertence à instituição. A pessoa não pertence à instituição. A pessoa não pertence à instituição. Sem AUTHENTICUS Sem ORCID
R. Rosmaninho
(Autor)
Outra
A pessoa não pertence à instituição. A pessoa não pertence à instituição. A pessoa não pertence à instituição. Sem AUTHENTICUS Sem ORCID
M. Simões
(Autor)
FEUP
M. M. S. M. Bastos
(Autor)
FEUP
O. C. Nunes
(Autor)
FEUP
M. Coelho
(Autor)
FEUP
L. F. Melo
(Autor)
FEUP
Revista
Título: BIOFOULINGImportada do Authenticus Pesquisar Publicações da Revista
Vol. 26
Páginas: 205-212
ISSN: 0892-7014
Editora: Taylor & Francis
Classificação Científica
FOS: Ciências exactas e naturais > Ciências biológicas
Outras Informações
ID Authenticus: P-003-A8R
Abstract (EN): This study presents a new technological approach to minimize the use of antimicrobial (AMB) agents and their deleterious effects, based on the principle of drug-delivery systems whereby the AMB chemicals are transported on microparticles. The efficacy of microparticles carrying the quaternary ammonium compound (QAC), benzyldimethyldodecyl ammonium chloride (BDMDAC), was assessed against Pseudomonas fluorescens in both the planktonic and the biofilm state. The microparticles were prepared using a layer-by-layer (LBL) self-assembly technique. Oppositely charged molecules of polyethyleneimine (PEI), sodium polystyrene sulfonate (PSS), and BDMDAC were assembled on polystyrene (PS) cores. BDMDAC-coated particles were observed by CryoSEM and their composition analyzed by X-ray microanalysis. Zeta potential measurements indicated that changes in surface charge were compatible with a BDMDAC/particle interaction. This biocidal carrier structure had significant stability, verified by the release of only 15% of the BDMDAC when immersed in water for 18 months. Biocidal carrier activity was evaluated by determining the survival ratio of P. fluorescens planktonic and biofilm cells after different exposure periods to BDMDAC-coated particles. Tests with biofilm cells were also performed with the free QAC. An efficient AMB effect (minimum bactericidal concentration) against suspended cells was found for a concentration of 9.2 mg l(-1) of BDMDAC on coated particles after incubation for 30 min and 6.5 mg l(-1) of BDMDAC on coated particles after 60 min. Exposure of biofilms to PS-PEI/PSS/BDMDAC (0.87 mg l(-1)) resulted in a decrease in viability of 60.5% and 66.5% of the total biofilm population for 30 and 60 min exposure times, respectively. Exposure for 60 min to 6.33 mg l(-1) and 11.75 mg l(-1) of BDMDAC in PS-PEI/PSS/BDMDAC particles promoted inactivation of 80.6% and 87.2% of the total population, respectively. The AMB effects obtained with the application of free BDMDAC were statistically similar to those promoted by the application of BDMDAC coated particles. The overall results indicate that this novel AMB strategy has potential for the control of microbial growth of planktonic cells and biofouling. Moreover, the technique allows the reuse of AMB molecules and consequently reduces the environmental risks associated with excessive use of AMB agents, thereby providing real benefits to public health.
Idioma: Inglês
Tipo (Avaliação Docente): Científica
Contacto: lmelo@fe.up.pt
Nº de páginas: 8
Documentos
Não foi encontrado nenhum documento associado à publicação com acesso permitido.
Publicações Relacionadas

Da mesma revista

96-well microtiter plates for biofouling simulation in biomedical settings (2014)
Artigo em Revista Científica Internacional
L. C. Gomes; J. M. R. Moreira; J. S. Teodósio; J. D. P. Araújo; J. M. Miranda; M. Simões ; L. F. Melo; F. J. Mergulhão
Validation of respirometry as a short-term method to assess the efficacy of biocides (2005)
Artigo em Revista Científica Internacional
Simoes, M; Pereira, MO; Vieira, MJ
Unsteady state flow and stagnation in distribution systems affect the biological stability of drinking water (2010)
Artigo em Revista Científica Internacional
Manuel, CM; Nunes, OC; Melo, LF
The effects of metabolite molecules produced by drinking water-isolated bacteria on their single and multispecies biofilms (2011)
Artigo em Revista Científica Internacional
Lucia Chaves Simoes; Manuel Simoes; Maria Joao Vieira
The effects of glutaraldehyde on the control of single and dual biofilms of Bacillus cereus and Pseudomonas fluorescens (2011)
Artigo em Revista Científica Internacional
Lucia C Simoes; Madalena Lemos; Paula Araujo; Ana Margarida Pereira; Manuel Simoes

Ver todas (34)

Recomendar Página Voltar ao Topo
Copyright 1996-2021 © Reitoria da Universidade do Porto  I Termos e Condições  I Acessibilidade  I Índice A-Z  I Livro de Visitas
Página gerada em: 2021-04-10 às 13:39:46 | Política de Utilização Aceitável | Política de Proteção de Dados Pessoais