Table II.

Molecular Weight (M _w) and Glass Transition Temperature (T _g) of Drug Loaded and Placebo Microspheres Before (Not irr) and After β-irradiation (Irr)

Formulation code	Mw (kDa)		T g (°C)
	Not irr	Irr	Not irr	Irr
MS 2M	16.7 ± 0.2	15.8 ± 0.0	45.39 ± 0.15	45.17 ± 0.21
MS 3A	38.7 ± 0.0	35.3 ± 0.2	49.82 ± 0.13	49.80 ± 0.10
Placebo 2M	15.7 ± 0.6	15.8 ± 0.3	45.18 ± 0.59	44.43 ± 0.06
Placebo 3A	34.8 ± 0.8	33.2 ± 1.0	49.47 ± 0.11	49.18 ± 0.01