Development and In-Vitro Evaluation of pH Responsive Polymeric Nano Hydrogel Carrier System for Gastro-Protective Delivery of Naproxen Sodium

Figure 2

(a) Degree of swelling of formulation N1–N9 at pH 1.2. (b) Degree of swelling of formulation N1–N9 at pH 6.8.

(a)

(b)