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Table 4 Inner wall surface properties of two different sized pipettes.

From: Surface properties of glass micropipettes and their effect on biological studies

Name Value (D t = 13 μm) Value (D t = 9 μm) Description
S a 31.1 nm 22.2 nm Average height of selected area
S q 39.0 nm 28.4 nm Root-mean-square height of selected area
S p 158.5 nm 151 nm Maximum peak height of selected area
S v 150.3 nm 132.6 nm Maximum valley depth of selected area
S z 308.9 nm 303.6 nm Maximum height of selected area
S 10z 273.3 nm 247.5 nm Ten-point height of selected area
S sk 0.0267 0.186 Skewness of selected area
S ku 2.945 3.740 Kurtosis of selected area
S dq 0.616 0.838 Root-mean-square gradient
S dr 17.773% 31.965% Developed interfacial area ratio