TABLE 3.
Summary of data and methods previously used to determine the cohesive character of biofilms
| Parameter measured | Type of biofilm | Age (days) | Device | Value (N/m2) | Reference |
|---|---|---|---|---|---|
| Apparent elastic modulus | P. aeruginosa SG81 | 1 | Rheometer based on uniaxial compression | 6,500 | 22 |
| P. aeruginosa PAO1 | 12 | Reactor system based on fluctuation in fluid shear | 17-40 | 37 | |
| Mixed culture | 12 | Rotating disk rheometer | 0.2-24 | 40 | |
| Shear modulus | Mixed culture | 60-100 | Collision device | 50-600 | 27 |
| Mixed culture | 23 | Reactor system based on fluctuation in fluid shear | 27 | 37 | |
| Not specified | 1-50 | Tensile test device based on biofilm breakage | 500-1,000 | 28 | |
| Tensile strength | P. aeruginosa | 5 | Glass micropipette based on separation by suction | 395-15,640 | 31 |
| Mixed culture | 60-100 | Rotating device | 1-7 | 27 | |
| Yield strength | P. aeruginosa SG81 | 1 | Rheometer based on uniaxial compression device | 980 | 22 |
| Adhesive strength | P. fluorescens | 10-27 | T-shaped probe | 0.3-0.6a | 11 |
a
This value is expressed in J/m2.