Research
Electrochemical Evaluation of the Antioxidant Capacity of Moroccan Olive Kernel
The aim of this study was to evaluate the total antioxidant capacity of different Moroccan olive kernel samples by the electrochemical methods. The paper presents the preparation and characterization of the H2O2 amperometric sensor and its utilization for antioxidant evaluation of some real olive oil samples from different regions of Morocco. The obtained results were found in good correlation with reality. The analytical calibration graph was recorded for H2O2 species. This method was used for determine the antioxidant capacity of olive kernel, obtaining results consistent with their phenol profiles.
New Process Based on the Coupling of an Electrochemical Sensor and Bioanalytical Column for Determining Antioxidant Capacity
A new approach, for antioxidant capacity determination was proposed. It is based on the using of the xanthine-xanthine oxidase system coupled with H2O2 electrochemical sensor. The paper presents the preparation and characterization of the H2O2 amperometric sensor and its utilization for antioxidant evaluation of some real samples (Garlic, tea and coffee). The obtained results were found in good correlation with reality.
Ni-NP/Ni Anodes with Varying Ni: NP Ratio Prepared by Electrodeposition for the Direct Methanol Fuel Cell
Ni-NP/Ni anodes with varying Ni:NP ratio were prepared by electrodeposition of a thin Ni-NP (Nickel-Natural Phosphate) catalyst layer onto Ni plate for a direct methanol fuel cell (DMFC). The morphology and structure of the catalyst layers were analyzed by TEM and EDX. The catalyst coating layer shows an alloy character. The results show that these electrodes are very active for the methanol oxidation and that the optimum Ni: NP surface coverage was 50: 50 at % for DMFC operating at room temperature.
