Titre :

Increased resistance to detachment of adherent microspheres and Bacillus spores subjected to a drying step

Auteur(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]

Titre de la revue :

Colloids and Surfaces B: Biointerfaces

Pagination :

293-300

Éditeur :

Elsevier

Date de publication :

2016

ISSN :

0927-7765

Mot(s)-clé(s) :

Bacillus spore
liquid bridge

Mot(s)-clé(s) en anglais :

microspheres
druing
detachment
adhesion

Discipline(s) HAL :

Sciences du Vivant [q-bio]/Ingénierie des aliments
Sciences de l'ingénieur [physics]/Génie des procédés
Sciences du Vivant [q-bio]

Résumé en anglais : [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 ...
Lire la suite >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.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL