Rodriguez D, Einarsson B, Carpio A
Departamento de Matemática Aplicada, Universidad Complutense de Madrid, Madrid, Spain.
Phys Rev E Stat Nonlin Soft Matter Phys. 2012 Dec;86(6 Pt 1):061914. doi: 10.1103/PhysRevE.86.061914. Epub 2012 Dec 27.
A stochastic model is used to assess the effect of external parameters on the development of submerged biofilms on smooth and rough surfaces. The model includes basic cellular mechanisms, such as division and spreading, together with an elementary description of the interaction with the surrounding flow and probabilistic rules for extracellular polymeric substance matrix generation, cell decay, and adhesion. Insight into the interplay of competing mechanisms such as the flow or the nutrient concentration change is gained. Erosion and growth processes combined produce biofilm structures moving downstream. A rich variety of patterns are generated: shrinking biofilms, patches, ripplelike structures traveling downstream, fingers, mounds, streamerlike patterns, flat layers, and porous and dendritic structures. The observed regimes depend on the carbon source and the type of bacteria.
一个随机模型用于评估外部参数对光滑和粗糙表面上淹没生物膜生长的影响。该模型包括基本的细胞机制，如分裂和扩散，以及与周围水流相互作用的基本描述，还有细胞外聚合物基质生成、细胞衰减和粘附的概率规则。深入了解了诸如水流或营养物浓度变化等竞争机制之间的相互作用。侵蚀和生长过程共同产生向下游移动的生物膜结构。产生了各种各样的模式：收缩的生物膜、斑块、向下游移动的波纹状结构、指状结构、丘状结构、带状模式、平坦层以及多孔和树枝状结构。观察到的状态取决于碳源和细菌类型。
