Fig. 4.
Scanning electron microscopy of NAG prepared by film hydration method. A) Span 40:chol:DCP (2.8:3.35:1 mole ratio), B) Span 60:chol:DCP (2.8:2.35:1 mole ratio), C) Span 80:chol:DCP (2.8.3.35:1 mole ratio).
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