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. 2005 Dec 1;570(Pt 3):485–499. doi: 10.1113/jphysiol.2005.100933

Figure 1. Sensitivity and time resolution of the volume recording.

Figure 1

The relative change in volume of a wild type oocyte (ΔVT/VT) was monitored at a noise level of 0.20 × 10−4 (0.02‰) calculated as two times the standard deviation of the data point obtained under baseline conditions. Previously published methods had noise levels 10–25 times higher: 0.3 × 10−3 (Zeuthen et al. 1997), and 0.5 × 10−3 (Gagnon et al. 2004) as indicated by the vertical lines Z and L. At time zero a volume increase of 0.5 × 10−3 was simulated by changing the bathing solution to one in which a low concentration of Lissamine green had been added (see text). The time constant of the solution change around the oocyte was about 0.5 s.