The relation between Escherichia coli surface functional groups' composition and their physicochemical properties

Brazilian Journal of Microbiology

Fatima Hamadi²  Hassan Latrache²  Hafida Zahir²  Abderrahmene Elghmari¹  Mohamed Timinouni¹  Mostapha Ellouali² 

[1] ,FST L'environmental et la Santé Beni Mellal,Marocco

关键词: Escherichia coli;    surface functional groups;    hydrophobicity;    electrophoretic mobility;    Escherichia coli;    grupos funcionais de superfície;    hidrofobicidade;    mobilidade eletroforética;   

DOI  :  10.1590/S1517-83822008000100003

来源: SciELO

【 摘 要 】

Escherichia coli surface characteristics including hydrophobicity, electrophoretic mobility and surface functional groups' composition were investigated. These characteristics were determined respectively by water contact angle measurements, microelectrophoresis and x-ray photoelectron spectroscopy (XPS). The relation between the physicochemical properties and functional groups' composition was also examined. The electrophoretic mobility at pH 7 appeared to be governed on the cell surface by the (O=C) functional groups. The cell surface's hydrophilicity was associated with high levels of (C-(O.N)) and (OH-(C-O-C)) functional groups, whereas the cell surface's hydrophobicity was associated with (C-(C,H)) functional groups.

【 授权许可】

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