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化学处理的Pseudomonas fluorescens生物膜的屈服行为

Samuel G V Charlton^1,2, Saikat Jana^3,2, Jinju Chen^4,2

¹Department of Civil, Environmental and Geomatic Engineering, Institute of Environmental Engineering, ETH Zürich, Zürich, 8093, Switzerland.

|July 29, 2024

概括

了解环境因素如何影响生物膜机制是关键. 这项研究表明,尿素会使生物膜变软,而铁和等离子会使它们变硬,影响生物膜的去除和材料的发展.

科学领域:

微生物学微生物学
材料科学材料科学材料科学
生物物理学的生物物理.

背景情况:

生物膜机制受到其物理化学环境的影响,包括细胞外基质组成和离子度.
了解这些影响可以导致具有可调节性质的新型生物材料.

研究的目的:

为了研究尿素,双价 (铁和) 和蒸脱离离子水对*Pseudomonas fluorescens*生物膜的非线性粘弹性的影响.
在不同的条件下使用非线性风湿学量化生物膜的结构分解.

主要方法:

使用非线性风湿学来测量Pseudomonas fluorescens生物膜的粘弹性和结构分解.
生物膜暴露在尿素,铁离子,离子和蒸脱离离子水中,以评估它们的影响.

主要成果:

尿素诱导的生物膜软化和应变超标类似于蒸脱离离子水,而不会影响微观结构或形态.
双价 (铁和) 加固生物膜,减少弹性能量消散,并导致形态纹.
铁离子导致了取决于速率的产量,而离子显示了取决于速率和应变的产量和分解.

结论:

应变速率对生物膜流动性越来越重要,因为离子会诱导硬化.
这些发现可以为有效的生物膜去除策略和生物膜衍生生物墨水用于增材制造的开发提供信息.

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