Publications by authors named "Maria C Mateus"
Article Synopsis
- The study investigates the dielectric properties and photocatalytic behavior of cobalt-doped P25 Degussa powder, focusing on various cobalt concentrations.
- Cobalt doping was achieved using a specific precursor, and the research identified a critical concentration limit beyond which metallic clusters form, affecting the uniformity of cobalt distribution in the titanium oxide matrix.
- Additionally, the findings indicate ongoing relaxation processes at temperatures below 400 °C, and reveal that certain electronic states exist within the energy gap of titanium oxide across all nanopowder samples, influencing their photocatalytic performance.
To investigate bioactive compounds potentially involved in the biotic interactions exhibited by Phlomis purpurea (Lamiaceae) in rhizospheres infested with Phytophthora cinnamomi, the plant rhizome was chemically analysed. The nortriterpenoid (17S)-2α,3α,11α,23,24-pentahydroxy-19(18 → 17)-abeo-28-norolean-12-en-18-one, was isolated and its structure was elucidated by comprehensive spectroscopic analysis, chiefly using 2D NMR experiments, and X-ray analysis. It was shown to be exuded by roots and to exhibit anti-Phytophthora and antitumor activities.
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