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- Title
Bacillus cereus adhesion: Real time investigation of the effect on the chemistry of industrial stainless steel.
- Authors
Hamid, Ksontini; Faten, Kachouri; Soumya, El; Saad, Ibnsouda; Hasna, Meftah; Hassan, Latrache; Moktar, Hamdi
- Abstract
The initial microorganism adhesion on substrate is an important step for the biofilm formation. The surface properties of the stainless steel and B. cereus were characterized by the sessile drop technique. Moreover, the physicochemical properties of surface adhesion and the impact of bio adhesion to the stainless steel were determined at different time of contact (2, 4, 7, 9 and 24 h). The results showed that the strain was hydrophilic (Giwi = 3.37 mJ/m), whereas the substratum has hydrophobic character (Giwi = −57.6 mJ/m). Stainless steel surface presents a weak electron-donor character (γ = 4.1 mJ/m) conversely to B. cereus that presents an important parameter (γ = 31.6 mJ/m). The bio adhesion was investigated at different time of contact. The data analysis after 2 h, confirmed the adhesion of B. cereus with an amount of 10 cfu/cm which increased to 1.210 cfu/cm after 24 h. Interestingly, despite the difference of hydropohbicity, the interaction between B. cereus and substratum was favored by the thermodynamic aspect of adhesion (ΔG < 0). Interestingly, the study of the effect of B. cereus adhesion on the stainless steel has revealed that, the substratum becomes hydrophilic (θ° = 41.3, ΔGiwi = 39.6 mJ/m) and highly electron donor (Γ = 52.9 mJ/m) after 2 h of bio adhesion.
- Subjects
BACILLUS cereus; BACTERIAL adhesion; BIOFILMS; HYDROPHILIC compounds; EFFECT of temperature on stainless steel
- Publication
Microbiology (00262617), 2013, Vol 82, Issue 1, p22
- ISSN
0026-2617
- Publication type
Article
- DOI
10.1134/S0026261713010165