Fibre Z25 studied in 5.0 mm caffeine: temperature = 6.1 °C, Ri = 383.9 Ω cm. Initial cable constants: λ = 2.0 mm, ri = 9734.0 kΩ cm−1, d = 70.9 μm, rm = 398.1 kΩ cm, Rm = 8.86 kΩ cm2, Cm = 8.6 μF cm−2. Final cable constants: λ = 1.9 mm, ri = 10839 kΩ cm−1, d = 67.2 μm, rm = 335.9 kΩ cm, Rm = 7.51 kΩ cm2, Cm = 8.6 μF cm−2.