Lateral and Perpendicular Interaction Forces Involved in Mobile and Immobile Adhesion of Microorganisms on Model Solid Surfaces |
| |
Authors: | Henk J Busscher Albert T Poortinga Rolf Bos |
| |
Institution: | (1) Laboratory for Materia Technica, University of Groningen, Bloemsingel 10, 9712 KZ Groningen, The Netherlands , NL |
| |
Abstract: | Gliding and near-surface swimming of microorganisms are described as a mobile form of microbial adhesion that need not necessarily
be reversible. It is argued that the reversibility of microbial adhesion depends on the depth of the secondary interaction
minimum, calculated from the forces between an organism and a substratum acting in a direction perpendicular to the substratum
surface. The mobility of adhering microorganisms depends on lateral interactions between the organisms. On ideally homogeneous
and smooth model surfaces, only mobile adhesion occurs because the multibody, lateral interactions are weak compared with
the thermal or Brownian motion energy of the organisms. Minor chemical or structural heterogeneities, which exist on all real-life
surfaces, yield a lateral interaction on adhering microorganisms. This causes their immobilization, which helps to explain
the physicochemical nature of microbial gliding or near-surface swimming. Moreover, these lateral interaction energies are
one order of magnitude smaller than the Lifshitz-Van der Waals, electrostatic, and acid-base forces acting perpendicular to
substratum surfaces that are responsible for adhesion.
Received: 2 April 1998 / Accepted: 26 May 1998 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|