Electrocatalytic oxidation of dopamine, ascorbic acid and uric acid at poly­2,6­diaminopyridine on the surface of carbon nanotubes/gc electrodes

Electrochemical characterization of poly(fuchsine acid) modified glassy carbon electrode and its application for simultaneous determination of ascorbic acid, epinephrine and uric acid

“…By plotting E p vs. pH, it was observed that there is a linear relationship with slopes − 0.059, − 0.056, and − 0.055 V pH −1 over the range of pH 3.0 to 8.0 for AA, EP and UA, respectively. The resulted slopes of the plot in the pH range 3.0-8.0 also indicate a two electron-two proton process for the oxidation of AA, EP and UA as reported previously [30].…”

Bacterial Stress and Osteoblast Responses on Graphene Oxide-Hydroxyapatite Electrodeposited on Titanium Dioxide Nanotube Arrays

“…There was no oxidation peak but there was a reduction peak, which may be due to the reduction of some of the C-C bonds of GO detected in PBS (Figure 6(b)). Such behavior was previously reported by Kamyabi and Shafiee [32].…”

Mathematical Modeling of Ascorbic Acid Thermal Degradation in Orange Juice during Industrial Pasteurizations

“…However, the domestic consumption of orange juice in Brazil is usually based on fresh juice, where there is no thermal treatment or compensation of degraded AA. The nutritional and organoleptic proprieties of this beverage may be affected by several factors such as microbiological or enzymatic, or even by chemical reactions that are dependent on environmental conditions such as pH, dissolved oxygen, temperature, metal catalysis and light exposure (Vieira et al 2000;Choi et al 2002;Moya and Coichev 2006;Kamyabi and Shafiee 2012).…”