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Gelatin microparticles containing propolis obtained by spray-drying technique: preparation and characterization

Authors
Journal
International Journal of Pharmaceutics
0378-5173
Publisher
Elsevier
Publication Date
Volume
264
Identifiers
DOI: 10.1016/s0378-5173(03)00386-7
Keywords
  • Propolis
  • Gelatin
  • Spray-Drying
  • Microparticle Characterization
  • Optimization

Abstract

Abstract Gelatin microparticles containing propolis extractive solution (PES) were prepared by spray-drying technique. The optimization of the spray-drying operating conditions and the proportions of gelatin and mannitol were investigated. Regular particle morphology was obtained when mannitol was used, whereas mannitol absence produced a substantial number of coalesced and agglomerated microparticles. Microparticles had a mean diameter of 2.70 μm without mannitol and 2.50 μm with mannitol. The entrapment efficiency for propolis of the microparticles was upto 41% without mannitol and 39% with mannitol. The microencapsulation by spray-drying technique maintained the activity of propolis against Staphylococcus aureus. These gelatin microparticles containing propolis would be useful for developing intermediary or eventual propolis dosage form without the PES’ strong and unpleasant taste, aromatic odour, and presence of ethanol.

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