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Comparisons of DPPH scavenging EC50 of curcumin, SCNP, and CSCNP while with and without UV irradiation (μg/mL).
| Sample Name | Irradiated at 0 Hour | Irradiated at Overnight | Efficiency a |
|---|---|---|---|
| Curcumin | 59 | 68 | 86.8% |
| CSCNP | 32 | 28 | 114.3% |
| SCNP | 44 | 23 | 191.3% |
a Formula = 1/(Irradiated overnight EC50/Irradiated 0-h EC50) × 100. EC50: half maximal effective concentration SCNP: silica-encapsulated curcumin nanoparticles; CSCNP: chitosan and silica co-encapsulated curcumin nanoparticles.
