Nitrogen source (0.5% in the medium) | Maximum mannanase activity (U/ml) |
---|---|
Penicillium sp. | |
Inorganic nitrogen source | |
Ammonium sulfate | 5.729 ± 1.39 |
Ammonium nitrate | 6.325 ± 1.55 |
Sodium nitrate | 5.446 ± 1.25 |
Potassium nitrate | 5.623 ± 1.30 |
Ammonium acetate | 5.429 ± 1.14 |
Urea | 5.463 ± 1.30 |
Organic nitrogen source | |
Yeast extract | 6.736 ± 1.62 |
Beef extract | 5.821 ± 1.30 |
Peptone | 5.916 ± 1.47 |
Casein | 5.431 ± 1.30 |
Soybean meal (defatted) | 5.402 ± 0.99 |
Combined form* | |
Yeast extract + ammonium nitrate | 6.672 ± 2.00 |
Peptone + ammonium nitrate | 5.838 ± 1.80 |
Casein + ammonium nitrate | 5.841 ± 1.43 |
Soybean meal + ammonium nitrate | 5.624 ± 1.30 |