http://www.sciepub.com/journal/WJAC World Journal of Analytical Chemistry is a peer-reviewed, open access journal that provides rapid publication of articles in all areas of analytical chemistry. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of analytical chemistry. Science and Education Publishing en 2013 Science and Education Publishing Co. Ltd All rights reserved. World Journal of Analytical Chemistry 10 2 January 2025 2013 Science and Education Publishing Co. Ltd All rights reserved. http://pubs.sciepub.com/wjac/10/2/1 Hibiscus sabdariffa L calyxes, remains a major problem despite the many stabilization techniques that exist. Membrane technologies have played a central role in stabilizing roselle anthocyanins. Until now, dissolved oxygen in juices has been treated by bubbling with an inert gas or by adding other molecules such as preservatives, which can cause considerable damage to human health. The electrochemical approach is a new stabilization technique that reduces dissolved oxygen in juice, cold and without adding other molecules. The reduction of dissolved oxygen on a platinum electrode is a new athermic technique using an electrolysis cell with two compartments separated by a cationic membrane. The fruit juice is stabilized by passing a reduction current through it for a specified period of time. The results obtained from bubbling reveal that it is necessary to bubble with nitrogen gas for 2 hours to obtain an anthocyanin concentration of 279.21 mg/L after storage at 37°C for 30 days, while 282.66 mg/L is obtained for the same extract treated electrochemically (30 min/-6 mA) and stored under the same conditions. Both concentrations are significantly different from the control concentration of 263.37 mg/L. Electrochemical treatment with a time/current combination of 30 min/-6 mA for 500 ml of Hibiscus sabdariffa L extract on a platinum/SCE electrode (in a batch reactor) preserved more than 10% of the anthocyanins at 25°C and 37°C after 30 days of storage, which is significantly more than the control. This had previously been problematic for other treatments. The classic Arrhenius, Ball, and Eyring models used showed the degrading effect of dissolved oxygen in the extract, with a significant difference (Ea = 4000 J/mol) between the activation energy of the electrically reduced extract and the control (untreated). This was corroborated by half-reaction time values of 24 s⁻¹ for the electrochemically treated extract and 20 s⁻¹ for the untreated control after 5 months of storage at 4°C. The activation enthalpy of the electrically reduced hibiscus extract is approximately 6 J/mol/K, and that of the control is 5.72 J/mol/K, showing that the electrochemical process occurs at low energy, i.e., 0.28 J/mol/K for a volume of approximately 250 ml.]]> Ndiaye Khady, Kane Cheikhou, Ayessou Nicolas, Cisse Mady, Diop Codou Mar 2025-10-29 Science and Education Publishing 2025-10-29 2 10 37 47 10.12691/wjac-10-2-1 http://pubs.sciepub.com/wjac/10/2/2 Afnan Wael Ibrahim Alanqar, Mohammed A. Meetani 2025-11-20 Science and Education Publishing 2025-11-20 2 10 48 57 10.12691/wjac-10-2-2 http://pubs.sciepub.com/wjac/10/2/3 This study assessed the physicochemical properties of oils extracted from the kernels of five Hevea brasiliensis clones grown in Côte d’Ivoire: GT1, PB217, IRCA41, IRCA230, and IRCA331. Oil yields ranged from 38.5% (GT1) to 47.2% (IRCA230), showing significant interclonal variability. Densities varied from 0.908 to 0.921 g/cm³, and dynamic viscosities from 45 to 58 mPa·s at 25°C. The acid (1.4–3.1 mg KOH/g), peroxide (2.1–3.8 meq O₂/kg), and saponification indices (183–198 mg KOH/g) indicated good oxidative stability. Principal Component Analysis (PCA) revealed three groups of clones: (i) GT1, PB217, and IRCA331, with dense and stable oils suitable for soap and cosmetic production; (ii) IRCA41, with more fluid oil suited for technical applications; and (iii) IRCA230, with unsaturated, high-yield oil ideal for biodiesel production. Unlike previous studies that focused mainly on Nigerian and other West African clones, this work provides the first comparative dataset for Ivorian GT1, PB217, IRCA41, IRCA230, and IRCA331 under local agro-ecological conditions. By identifying clone-specific profiles linked to different industrial uses, these results offer concrete opportunities for import substitution in oleochemical raw materials and additional income for smallholder rubber farmers. Overall, rubber seed represents a strategic oleaginous resource for local valorization and the development of a sustainable bioeconomy in Côte d’Ivoire.]]> Okoma D. Muriel J., Niamketchi G. Léonce, Sylla Ardjouma, Konan Brou Roger, Konan K. Jean-Louis 2025-11-24 Science and Education Publishing 2025-11-24 2 10 58 63 10.12691/wjac-10-2-3