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Growth hormone release from two crosslinked polymer systems (90-150 μm particle size, both prepared from 1:1 monomer molar feed ratios and using 1% EGDMA as a crosslinking agent. Release was in 1× PBS and 0.1N HCl. 1× PBS. Polymer particle samples: P(MAA-co-NVP) (◆), P(MAA-g-PEG) (■) both in 0.1N HCl. Also polymer particle samples P(MAA-co-NVP) (◊), P(MAA-g-PEG) (□) in 1× PBS samples (n=3 ± SD); 0.1N HCl samples (n=1).
