TABLE 4.
Estimate of the half saturation constant, Km + Sn, and of the maximum velocity, Vmax, of the three hydrolytic enzymes determined for the different sediment types
| Sediment type | Alkaline
phosphatase
|
β-Glucosidase
|
Aminopeptidase
|
|||
|---|---|---|---|---|---|---|
| Km + Sn (μM) | Vmax (nmol · cm−3 · h−1) | Km + Sn (μM) | Vmax (nmol · cm−3 · h−1) | Km + Sn (μM) | Vmax (nmol · cm−3 · h−1) | |
| Dangast | 26.8 ± 5.8 | 115.3 ± 12.0 | 21.1 ± 6.8 | 20.6 ± 1.9 | 26.2 ± 11.1 | 6.1 ± 1.1 |
| Schillig sand | 23.0 ± 20.7 | 55.4 ± 15.3 | 53.0 ± 16.6 | 16.6 ± 2.8 | 42.9 ± 7.0 | 86.0 ± 25.7 |
| Schillig clay | 20.6 ± 16.4 | 15.1 ± 3.7 | 12.1 ± 2.0 | 5.1 ± 0.2 | 36.8 ± 12.8 | 33.1 ± 7.5 |
| Sapropel S3 core 66 | 27.5 ± 5.2 | 1.7 ± 0.1 | NDa | ND | ND | ND |
a
ND, not determined.