Increased resistance to detachment of ...
Document type :
Compte-rendu et recension critique d'ouvrage
Title :
Increased resistance to detachment of adherent microspheres and Bacillus spores subjected to a drying step
Author(s) :
Faille, Christine [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bihi, Ilyesse [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Ronse, Annette [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Ronse, Gilles [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Baudoin, Michael [Auteur]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Zoueshtiagh, Farzam [Auteur]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Unité Matériaux et Transformations - UMR 8207 [UMET]
Bihi, Ilyesse [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Ronse, Annette [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Ronse, Gilles [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Baudoin, Michael [Auteur]

Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Zoueshtiagh, Farzam [Auteur]

Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Journal title :
Colloids and Surfaces B: Biointerfaces
Pages :
293-300
Publisher :
Elsevier
Publication date :
2016
ISSN :
0927-7765
Keyword(s) :
Bacillus spore
liquid bridge
liquid bridge
English keyword(s) :
microspheres
druing
detachment
adhesion
druing
detachment
adhesion
HAL domain(s) :
Sciences du Vivant [q-bio]/Ingénierie des aliments
Sciences de l'ingénieur [physics]/Génie des procédés
Sciences du Vivant [q-bio]
Sciences de l'ingénieur [physics]/Génie des procédés
Sciences du Vivant [q-bio]
English abstract : [en]
In various environments, including that of food processing, adherent bacteria are often subjected to drying conditions. These conditions have been shown to result in changes in the ability of biofilms to cross-contaminate ...
Show more >In various environments, including that of food processing, adherent bacteria are often subjected to drying conditions. These conditions have been shown to result in changes in the ability of biofilms to cross-contaminate food in contact with them. In this study, we investigated the consequences of a drying step on the further ability of adherent bacterial spores to resist detachment. An initial series of experiment was set up with latex microspheres as a model. A microsphere suspension was deposited on a glass slide and incubated at 25, 35 and 50 ◦C for times ranging from 1 h to 48 h. By subjecting the dried slides to increasing water flow rates, we showed that both time and temperature affected the ease of microsphere detachment. Similar observations were made for three Bacillus spores despite differences in their surface properties, especially regarding their surface physicochemistry. The differences in ease of adherent spore detachment could not be clearly linked to the minor changes in spore morphology, observed after drying in various environmental conditions. In order to explain the increased interaction between spheres or spores and glass slides, the authors made several assumptions regarding the possible underlying mechanisms: the shape of the liquid bridge between the sphere and the substratum, which is greatly influenced by the hydrophilic/hydrophobic characters of both surfaces; the accumulation of soil at the liquid/air interface; the presence of trapped nano-bubbles around and/or under the sphere.Show less >
Show more >In various environments, including that of food processing, adherent bacteria are often subjected to drying conditions. These conditions have been shown to result in changes in the ability of biofilms to cross-contaminate food in contact with them. In this study, we investigated the consequences of a drying step on the further ability of adherent bacterial spores to resist detachment. An initial series of experiment was set up with latex microspheres as a model. A microsphere suspension was deposited on a glass slide and incubated at 25, 35 and 50 ◦C for times ranging from 1 h to 48 h. By subjecting the dried slides to increasing water flow rates, we showed that both time and temperature affected the ease of microsphere detachment. Similar observations were made for three Bacillus spores despite differences in their surface properties, especially regarding their surface physicochemistry. The differences in ease of adherent spore detachment could not be clearly linked to the minor changes in spore morphology, observed after drying in various environmental conditions. In order to explain the increased interaction between spheres or spores and glass slides, the authors made several assumptions regarding the possible underlying mechanisms: the shape of the liquid bridge between the sphere and the substratum, which is greatly influenced by the hydrophilic/hydrophobic characters of both surfaces; the accumulation of soil at the liquid/air interface; the presence of trapped nano-bubbles around and/or under the sphere.Show less >
Language :
Anglais
Popular science :
Non
Source :