Table 1. Quantification of amino groups on chemically modified PMMA.

Chemistry incubation conditions		Density (nmol NH2/cm2)
A	1 h	0.28 ± 0.03
	2 h	0.29 ± 0.02
B	Aqueous medium	0.16 ± 0.01

A, aminolysis reaction described in this paper; B, chemistry by Bulmus et al. (26).