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Type: Artigo de periódico
Title: Fractal analysis of Xylella fastidiosa biofilm formation
Author: Moreau, ALD
Lorite, GS
Rodrigues, CM
Souza, AA
Cotta, MA
Abstract: We have investigated the growth process of Xylella fastidiosa biofilms inoculated on a glass. The size and the distance between biofilms were analyzed by optical images; a fractal analysis was carried out using scaling concepts and atomic force microscopy images. We observed that different biofilms show similar fractal characteristics, although morphological variations can be identified for different biofilm stages. Two types of structural patterns are suggested from the observed fractal dimensions D(f). In the initial and final stages of biofilm formation, D(f) is 2.73 + 0.06 and 2.68 + 0.06, respectively, while in the maturation stage, D(f) = 2.57 + 0.08. These values suggest that the biofilm growth can be understood as an Eden model in the former case, while diffusion-limited aggregation (DLA) seems to dominate the maturation stage. Changes in the correlation length parallel to the surface were also observed; these results were correlated with the biofilm matrix formation, which can hinder nutrient diffusion and thus create conditions to drive DLA growth. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3173172]
Country: EUA
Editor: Amer Inst Physics
Citation: Journal Of Applied Physics. Amer Inst Physics, v. 106, n. 2, 2009.
Rights: aberto
Identifier DOI: 10.1063/1.3173172
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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