RESUMO
To improve the peroxidase-like activities of metal-organic frameworks (MOFs) as nanozymes, a ternary MIL-100(Fe)@PMo12@3DGO nanocomposite was designed and fabricated by encapsulating Keggin-type H3PMo12O40 (PMo12) with fast and reversible multi-electron redox processes and an electron-rich structure into MIL-100(Fe), then being covered by three-dimensional graphene (3DGO) with higher conductivity, larger surface area, higher porosity, and better chemical stability. As a consequence, the as-prepared MIL-100(Fe)@PMo12@3DGO nanocomposite exhibits excellent peroxidase-like activities, namely, the lowest limit of detection (0.14 µM) in the range of 1-100 µM for glucose to date, to the best of our knowledge, attributed to the individual and synergistic effects of H3PMo12O40, 3DGO and MIL-100(Fe).
RESUMO
Effects of concentration of Polyoxyethylene (40) stearate, Na(+) and P-gp inhibitor on cyclosporin A (CyA-SD) absorption were investigated by in situ circulation method. The results showed that the absorption of CyA increased linearly with its concentration, indicating a passive diffusion process was dominated. CyA absorption decreased with the carrier concentration. The concentration of Na(+) didn't influence the drug absorbed (P > 0.05). The P-gp inhibitor enhanced the CyA absorption significantly (P < 0.05). The passive diffusion process during the intestinal absorption indicated that the solubility enhancement of CyA is one of the mechanisms for the absorption of this water insoluble drug.
