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Three dimensional response surface plots showing the effect of variable on the response:- encapsulation efficiency; (A) effect of PLGA and PVA concentration on encapsulation efficiency (Actual constant ethyl acetate (ml) = 4.25); (B) effect of PLGA and ethyl acetate on encapsulation efficiency (Actual constant PVA (%) = 1.0); (C) effect of PVA and ethyl acetate on encapsulation efficiency (Actual constant PLGA (mg) = 4.5).
