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Relationships between polydispersity index values and particle size of risedronate sodium in relation to applied excipients. (SDS = sodium dodecyl sulfate, PLS = polysorbate 80, PEG = macrogol 6000, SCMC = sodium carboxymethyl cellulose, SCMD = sodium carboxymethyl dextran, DSP = sodium dodecyl sulfate/macrogol 6000; fill colour of individual symbols depends on concentration of excipient: 1% = blue, 3% = red, 5% = green).
