CI
Professeur
Activité scientifique
Profil chercheur
Enseignant-chercheur à l’Université de Yaoundé I. Grade : Professeur.
Publications scientifiques
Alfred K. Njamnshi, Jacques Fame Ndongo, Ferdinand Ngoh Ngoh, Lejeune Mbella Mbella, P.M. Ghogomu, Seraphin M. Fouda et 94 autre(s)
Neuroscience
Alfred K. Njamnshi, Jacques Fame Ndongo, P.M. Ghogomu, Marie-Thérèse O. Ondoua, Seraphin M. Fouda, Madeleine Tchuinte et 94 autre(s)
SSRN Electronic Journal
Daouda Abia, Gaël Claude Mbafou Fondjo, Elie Acayanka, Serge Alain Djepang, Abba Paltahe, Samuel Laminsi et 1 autre(s)
International Journal of Environmental Studies
Wastewater samples from liquid effluents of cotton oil refinery in Far-Northern Cameroon were exposed to a gliding arc discharge for various exposure times in a cold plasma reactor. The analysed results showed high levels of organic pollution parameters (TOC = 4635 mg/L, COD = 6943, 98 mg/L) before treatment. More than 56% TOC and 75% COD abatement were obtained after 30 min treatment in batch conditions with a laboratory reactor. The resultant pollution abatement is attributed both to strong oxidizing effects of °OH and NO° radicals formed in the plasma and their derivatives (H2O2, ONO2H and NO3H). The conductivity and TDS increase linearly and the pH, TOC and COD decrease with increasing exposure time to the discharge. The oxidation obeys a pseudo first-order kinetics law (kinetic rate: k1DCO = 0, 0381 min−1 and k1COT = 0, 0245 min−1).
Njoyim Estella Buleng Tamungang, Samuel Laminsi, P.M. Ghogomu, D. Njopwouo, J. L. Brisset
Chemical Engineering Journal
Estella Tamungang Njoyim, P.M. Ghogomu, Samuel Laminsi, Serge Nzali, Avaly Doubla, Jean‐Louis Brisset
Industrial & Engineering Chemistry Research
Adsorption on oyster shell powder (OS) was combined with gliding electric discharge to abate pollution of surface waters sampled in brooks passing through large Cameroonian cities and collecting industrial and domestic wastes. OS powder incorporated into the aqueous samples after exposure to the discharge improved pollutant abatement as compared to the plasma treatment alone. The process kinetics involved pseudo zero-order reactions for treatments longer than 5 min. Total organic carbon linearly decreases with increasing exposure time to the discharge ( k ≈ 0.13 mg C L −1 min −1 for a 1 g L −1 standard OS charge). The rate constant linearly increases with the incorporated OS mass, which increases the sample pH. The coupled process is more efficient than a single plasma treatment of the polluted liquid in terms of operation cost, waste abatement ratio, and reaction rate. A chemical model involving known plasma generated species and matching acid−base effects is proposed.
P.M. Ghogomu, R. Rakotosaona, M. Bouroukba, D. Petitjean, Nathalie Hubert, M. Dirand
Molecular Crystals and Liquid Crystals
The phase diagram of (naphthalene + n-pentacosane) has been determined by thermometrical and differential thermal analyses and X-ray diffraction carried out on the two pure compounds and twelve binary mixtures. The solids phases of the pure compounds are immiscible, but there is cosolubility in the liquid state. With increasing temperature, the binary mixtures undergo structural changes corresponding to those of pure n-pentacosane, while naphthalene seems to retain its initial crystalline structure until fusion occurs. The binary diagram, determined by experiments, displays an eutectic solidification with immiscibility in the solid state:
P.M. Ghogomu, R. Rakotosaona, M. Bouroukba, D. Petitjean, Nathalie Hubert, M. Dirand
Fuel
P.M. Ghogomu, Élise Provost, M. Bouroukba, M. Dirand, Michael Hoch
Journal of Thermal Analysis and Calorimetry
P.M. Ghogomu, M. Bouroukba, J. Dellacherie, D. Balesdent, M. Dirand
Thermochimica Acta
P.M. Ghogomu, L. Schuffenecker, J. Dellacherie, M. Dirand, D. Balesdent
Thermochimica Acta
P.M. Ghogomu, J. Dellacherie, D. Balesdent
Thermochimica Acta
P.M. Ghogomu, J. Dellacherie, D. Balesdent
The Journal of Chemical Thermodynamics
Apres une etude preliminaire de l'influence des impuretes sur la solubilite des n-alcanes dans l'ethylbenzene, la solubilite des n-paraffines pures (C20) a C24), de 17 melanges binaires C22C24 et de 11 melanges binaires C23-C24 a ete mesuree par analyse thermique, a des temperatures comprises entre 265-305K. Les cristaux deposes a 290K ont ete analyses par chromatographie en phase gazeuse. Les enthalpies de dissolution des n-paraffines pures et des melanges binaires dans l'ethylbenzene ont ete determinees par calorimetrie de chute. L'etude theorique des equilibres de cristallisation a permis d'etablir les deux diagrammes de phases : C22-C24 et C23-C24
Olivia Nail-Beatty, Agustín Ibáñez, Rym Ayadi, Paweł Świeboda, Alfred K. Njamnshi, Jo‐An Occhipinti et 21 autre(s)
Brain Communications
Optimal brain health is essential to smoothing major global skill-intensive economic transitions, such as the bioeconomy, green, care economy and digital transitions. Good brain health is vital to socio-economic sustainability, productivity and well-being. The care transition focuses on recognizing and investing in care services and care work as essential for economic growth and social well-being. The green transition involves shifting towards environmentally sustainable and fairer societies to combat climate change and environmental degradation. The digital transition aims to unlock digital growth potential and deploy innovative solutions for businesses and citizens, and to improve the accessibility and efficiency of services. The bioeconomy transition refers to the shift towards an economy based on products, services and processes derived from biological resources, such as plants and microorganisms. Brain capital, which encompasses brain health and brain skills, is a critical economic asset for the success of economies of the future. The brain economy transition from a brain-negative (brain-unhealthy) economy, which depletes brain capital, to a brain-positive (brain-healthy) economy, which arrests and reverses the loss of brain capital, will be foundational to these major transitions. Increased brain capital is vital to educational attainment, upskilling and reskilling. In this paper, we provide a detailed roadmap for the brain economy transition.
Daouda Abia, Serge Nzali, Elie Acayanka, Georges Y. Kamgang, Samuel Laminsi, P.M. Ghogomu
Journal of Industrial and Engineering Chemistry
P.M. Ghogomu, M. Bouroukba, J. Dellacherie, D. Balesdent, M. Dirand
Thermochimica Acta
P.M. Ghogomu, M. Bouroukba, J. Dellacherie, D. Balesdent, Michel Dirand
Thermochimica Acta
Profil chercheur
Publications scientifiques
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Collaborations
