Contact angles of three liquids on the glandular surface of the digestive zone and the external surface of the pitcher, and free surface energy (total and its dispersion and polar contributions) of the surfaces calculated according to the Owens-Wendt-Kaelble method (OW) and the Wu method(W)
| . | . | Contact angle (deg.) . | . | Surface energy OW (mN m−1) . | . | . | Surface energy W (mN m−1) . | . | . | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Plant . | Liquid . | Mean ± s.d. . | n . | Total . | Dispersion . | Polar . | Total . | Dispersion . | Polar . | |||||
| Glandular surface | ||||||||||||||
| 1 | Water | 36.7±1.2 | 3 | 56.84 | 12.62 | 44.41 | 56.98 | 24.05 | 32.93 | |||||
| Diiodomethane | 50.6±2.8 | 3 | ||||||||||||
| Ethylene glycol | 40.0±0.8 | 3 | ||||||||||||
| 2 | Water | 30.0±5.3 | 5 | 60.80 | 15.90 | 44.90 | 61.93 | 28.85 | 33.09 | |||||
| Diiodomethane | 36.0±4.6 | 5 | ||||||||||||
| Ethylene glycol | 32.7±6.1 | 5 | ||||||||||||
| 3 | Water | 31.9±4.6 | 5 | 61.57 | 8.87 | 52.70 | 58.19 | 21.68 | 36.51 | |||||
| Diiodomethane | 54.7±11.4 | 5 | ||||||||||||
| Ethylene glycol | 43.3±10.9 | 5 | ||||||||||||
| External surface | ||||||||||||||
| 1 | Water | 70.5±0.2 | 3 | 38.09 | 26.08 | 12.01 | 43.59 | 31.36 | 12.23 | |||||
| Diiodomethane | 39.5±3.9 | 4 | ||||||||||||
| Ethylene glycol | 48.8±11.3 | 4 | ||||||||||||
| 2 | Water | 59.3±4.5 | 5 | 41.76 | 19.24 | 22.52 | 46.67 | 28.13 | 18.54 | |||||
| Diiodomethane | 42.0±2.5 | 5 | ||||||||||||
| Ethylene glycol | 50.7±2.3 | 5 | ||||||||||||
| 3 | Water | 62.2±9.2 | 5 | 41.34 | 21.60 | 19.74 | 46.83 | 29.77 | 17.06 | |||||
| Diiodomethane | 40.5±2.3 | 5 | ||||||||||||
| Ethylene glycol | 45.5±5.4 | 5 | ||||||||||||
| . | . | Contact angle (deg.) . | . | Surface energy OW (mN m−1) . | . | . | Surface energy W (mN m−1) . | . | . | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Plant . | Liquid . | Mean ± s.d. . | n . | Total . | Dispersion . | Polar . | Total . | Dispersion . | Polar . | |||||
| Glandular surface | ||||||||||||||
| 1 | Water | 36.7±1.2 | 3 | 56.84 | 12.62 | 44.41 | 56.98 | 24.05 | 32.93 | |||||
| Diiodomethane | 50.6±2.8 | 3 | ||||||||||||
| Ethylene glycol | 40.0±0.8 | 3 | ||||||||||||
| 2 | Water | 30.0±5.3 | 5 | 60.80 | 15.90 | 44.90 | 61.93 | 28.85 | 33.09 | |||||
| Diiodomethane | 36.0±4.6 | 5 | ||||||||||||
| Ethylene glycol | 32.7±6.1 | 5 | ||||||||||||
| 3 | Water | 31.9±4.6 | 5 | 61.57 | 8.87 | 52.70 | 58.19 | 21.68 | 36.51 | |||||
| Diiodomethane | 54.7±11.4 | 5 | ||||||||||||
| Ethylene glycol | 43.3±10.9 | 5 | ||||||||||||
| External surface | ||||||||||||||
| 1 | Water | 70.5±0.2 | 3 | 38.09 | 26.08 | 12.01 | 43.59 | 31.36 | 12.23 | |||||
| Diiodomethane | 39.5±3.9 | 4 | ||||||||||||
| Ethylene glycol | 48.8±11.3 | 4 | ||||||||||||
| 2 | Water | 59.3±4.5 | 5 | 41.76 | 19.24 | 22.52 | 46.67 | 28.13 | 18.54 | |||||
| Diiodomethane | 42.0±2.5 | 5 | ||||||||||||
| Ethylene glycol | 50.7±2.3 | 5 | ||||||||||||
| 3 | Water | 62.2±9.2 | 5 | 41.34 | 21.60 | 19.74 | 46.83 | 29.77 | 17.06 | |||||
| Diiodomethane | 40.5±2.3 | 5 | ||||||||||||
| Ethylene glycol | 45.5±5.4 | 5 | ||||||||||||
n, number of measurements.