Role of cohesion in the material description of biofilms.
Role of cohesion in the material description of biofilms.
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DOI：
10.1103/physreve.74.031902
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发表时间：
2006-09
期刊：
影响因子：
--
通讯作者：
Isaac Klapper;J. Dockery
中科院分区：
文献类型：
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作者：
Isaac Klapper;J. Dockery
生物膜的结构对生物膜的功能和控制起着重要的作用。因此，重要的是要确定力学在多大程度上可以决定生物膜的结构。我们认为一个通用的定性生物膜的组成描述，作为假设的一个小数目的基本物理性质的生物膜的粘弹性和凝聚力。内聚能对生物膜结构的影响，然后探讨。稳定的解决方案和能量极小值进行了研究，它表明，凝聚能自然导致一个自由表面膜状态。研究发现，在许多情况下，生物膜可以通过旋节分解形成异质性。这种材料的异质性可能有重要的影响，在生物膜的结构稳定性在短期和长期的时间尺度。
Biofilm structure plays an important role in biofilm function and control. It is thus important to determine the extent to which mechanics may determine structure in biofilms. We consider a generic qualitative constitutive description of biofilm incorporating as assumptions a small number of fundamental physical properties of biofilm viscoelasticity and cohesion. Implications of cohesive energy on biofilm structure are then explored. Steady solutions and energy minima are studied and it is demonstrated that cohesion energy leads naturally to a free surface film state. It is found that in many circumstances, biofilms could be subject to heterogeneity formation via spinodal decomposition. Such material heterogeneity may have important implications for structural stability in biofilms both on short and long time scales.