Turmeric extract is less effective because the main ingredient of curcumin has a low solubility. Therefore, it is necessary to convert turmeric extract into a solid dispersion form to increase the dissolution of curcumin.To determine the antibacterial activity of mucoadhesive gastroretentive drug delivery system of alginate beads containing solid dispersion of turmeric extract.Turmeric powder was macerated with 96% ethanol for 8 days. The macerate was evaporated with a rotary evaporator at 50°C to obtain concentrated extract. Solid dispersion of turmeric extract was prepared by solvent method by using polyvinylpyrrolidone (PVP) K30 with a ratio of 1: 1 and 1: 2. The solid dispersion of turmeric extract was encapsulated with alginate gel by gelation method. The antibacterial of alginate beads containing solid dispersion of turmeric extract was tested by using hole agar plate diffusion method against Staphylococcus aureus and Escherichia coli as bacterial models.The size of alginate beads containing turmeric extract-PVP solid dispersion was about 1.3 mm. Antibacterial activity test against Staphylococcus aureus and Escherichia coli showed that alginate beads containing turmeric extract-PVP solid dispersion gave stronger antibacterial activity than those containing turmeric extract without solid dispersion. The antibacterial activity of alginate beads turmeric extract-PVP (1: 2) solid dispersion was stronger than those containing turmeric-extract (1: 1) solid dispersion.Based on the results of this study it can be concluded that alginate beads containing turmeric extract-PVP solid dispersion gives the stronger antibacterial activity than those containing turmeric extract without solid dispersion.
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