2.3. Morphological characterization of the microparticles by optical
and scanning electron microscopy
Optical microscopy of the moist microparticles was performed
using a microscope MDL-150-TPI model, and a digital camera
Samsung 14.2 model for image capture. The morphology of the
freeze-dried microparticles was evaluated using a scanning electron
microscope JEOL brand, model JM6360. The microcapsules
were fixed with a double sided tape on aluminum stubs and coated
with a thin layer of gold.