Salt Modulates Bacterial Hydrophobicity and Charge Properties Influencing Adhesion of Pseudomonas Aeruginosa (PA01) in Aqueous Suspensions
作者： Jacob J. Shephard , David M. Savory , Phil J. Bremer , A. James McQuillan
DOI: 10.1021/LA1007878
关键词:
摘要: The influence on cell hydrophobicity of differential extension with ionic strength lipopolysaccharide molecules (LPS), which exist as charged and uncharged polymers at the surface Gram-negative bacterium Pseudomonas aeruginosa (PA01), has been investigated. Attenuated total reflection infrared (ATR-IR) spectral absorptions from a single layer cells adsorbed to ZnSe increased in intensity increasing NaCl concentration up 0.1 mol L−1. Dynamic contact angle measurements (Wilhelmy plate tensiometry) made having an adherence hexadecane suggest that PA01 were most hydrophobic L−1 solutions. These data indicate charge screening induced compression LPS decreasing cell-surface approach distance due greater predominance polymers. Interestingly, layers 0.3 had lower...
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