Assessment of hydrophobicity and roughness of stainless steel adhered by an isolate of Bacillus cereus from a dairy plant

Brazilian Journal of Microbiology

Patrícia Campos Bernardes²  Nélio José De Andrade²  Sukarno Olavo Ferreira¹  João Paulo Natalino De Sá²  Emiliane Andrade Araújo²  Deyse Maria Zanom Delatorre²  Lívia Maria Pinheiro Luiz² 

[1] ,Universidade Federal de Viçosa Departamento de Tecnologia de Alimentos Viçosa MG ,Brasil

关键词: hydrophobicity;    roughness;    Bacillus cereus;    dairy plant;    adhesion;   

DOI  :  10.1590/S1517-83822010000400017

来源: SciELO

【 摘 要 】

The interaction between the surface of stainless steel and Bacillus cereus was studied in terms of the characteristics of interfacial interaction determined from the measurement of the contact angle of the surface of B. cereus and stainless steel in the presence or absence of B. cereus adherence. The microtopographies and the roughness of the surface of stainless steel and stainless steel adhered by B. cereus were evaluated with the help of atomic force microscopy and perfilometry. The strain of B. cereus studied was considered hydrophilic, whereas the stainless steel was considered hydrophobic. The adhesion was not thermodynamically favorable (ΔGadhesion > 0) between the stainless steel and the strain of B. cereus studied. Thus, the interaction between them was not favored by the thermodynamic aspect of adhesion. There was no difference (p > 0.05) in the roughness of the surfaces of stainless steel adhered by B. cereus when analyzed by atomic force microscope and perfilometry.

【 授权许可】

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