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Adhesion. Definition. noun. (physics, chemistry) The force of attraction between unlike molecules, or the attraction between the surfaces of contacting bodies.(cell biology) The binding of a cell to another cell, or a cell to a surface, via specific cell adhesion molecules.upplement. Adhesion may refer to the joining of two different substances due to attractive forces that hold them. For instance, cohesion causes water to form drops and adhesion keeps the water drops on the surfaces of leaves and flowers in place.
To measure the strength of bacterial adhesion it is necessary to remove them from a surface. Fowler and McKay [79] described two types of adhesion measurement: (a) adhesion number (the counting of cells before and after an event) and (b) critical force (measurements during an event).t is believed that the effect was due to a decrease in the bacterial surface polymer at lower temperatures as well as effects such as reduced surface area. However, Herald and Zottola [65] observed that the presence of bacterial surface appendages was dependent on temperature.