Table 2.
Percentage ± standard deviation of immobile D. magna individuals after 48 h of exposure to maximum concentration samples (100 mg/L). The assay was performed at 25° ± 2° C, in darkness. N°. organisms/replicate = 10; n = 3. EC50 K2Cr2O7 = 0.586 mg/L (C.L. 95% = 0.401–0.772)
| Samples | Mean immobile individual % at max concentration | S.D |
|---|---|---|
| CTRL | 0.00 | 0.00 |
| betaine:ethylene glycol | 5.00 | 0.50 |
| betaine:citric acid | 0.00 | 0.00 |
| betaine:glycerol | 5.00 | 0.50 |
| betaine:levulinic acid | 10.00 | 0.58 |
| betaine:L-lactic acid | 0.00 | 0.00 |
| proline:glycerol | 5.00 | 0.50 |
| proline:lactic acid | 0.00 | 0.00 |
| proline:levulinic acid | 0.00 | 0.00 |
| proline:malic acid | 0.00 | 0.00 |
| cholinium bitartrate:citric acid | 10.00 | 0.58 |
| choline acetate:imidazole | 15.00 | 0.50 |
| choline acetate:levulinic acid | 5.00 | 0.50 |
| choline acetate:glycolic acid | 0.00 | 0.00 |
| choline acetate:diglycolic acid | 10.00 | 0.58 |
| choline acetate:citric acid | 5.00 | 0.50 |