Department
Departement of Chemistry
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Recent Publications
Physico-chemical properties of LaAlO3 catalysts
temperatures in order to investigate their physicochemical properties. The prepared samples
were characterized by XRD, TG/DTA, IR, Laser granulometry and cyclic voltammetry. During
calcination temperatures, phase evolution were observed. We observed that, the calcination
temperature affects significantly the particle size and the catalytic activity of the oxide at
higher temperature. The crystallite size result exhibited the same trend with increasing
calcination temperature. Similar results were found with LaCoO3 oxide [1]. Evolution of
Oxygen shows that the current density at 950°C is five times lower than 1050°C. This result
is in good agreement with those reported by Einaga et al. [2] on the benzene oxidation over
LaMO3 (M =Mn, Co and Al) perovskite catalysts. The catalytic performance of the LaAlO3
sample is relevant with the crystalline size and the rate of oxygen migration from bulk
towards surface [3]. This trend agrees well with the average particle size determined from
XRD pattern parameters of the LaAlO3 oxide. From this study, calcination temperature can
be chosen in order to obtain the effective catalyst necessary for the desired catalytic
reaction.
Citation
M. SAADI Houcine, (2023-10-25), "Physico-chemical properties of LaAlO3 catalysts", [international] 1st International seminar on chemical processes and sustainable development , Skikda Algeria
Effects of the Solvent and Calcination Temperature on LaFeO3 Catalysts for Methanol Oxidation
LaFeO3 catalysts by citrate sol gel method. The obtained samples were subjected to various
calcination temperatures in order to study the catalytic activity and stability for methanol
electro-oxidation by XRD, cyclic voltammetry and chronoamperometry. The crystallinity of
the LaFeO3 phase in both cases is improved with increasing calcination temperature. The
samples prepared using ethanol exhibit higher catalytic properties than those prepared in
water for different calcination temperatures. Moreover, the catalyst prepared in ethanol and
calcined at 1050 °C, exhibits a high catalytic activity in methanol electro-oxidation and is ~
two times greater than that obtained at 750 °C.
Citation
M. SAADI Houcine, (2023-10-09), "Effects of the Solvent and Calcination Temperature on LaFeO3 Catalysts for Methanol Oxidation", [international] The 2nd International Conference of Nanotechnology for Environmental Protection and Clean Energy Production , Constantine , Algeria
Bibliographic study in Additive Manufacturing
production of more innovative, customized and sustainable products with high added value. To compete in this turbulent environment,
manufacturers have sought new fabrication techniques to provide the necessary tools to support the need for increased flexibility and enable
economic low volume production. One such emerging technique is Additive manufacturing (AM). AM is a method of manufacture which
involves the joining of materials, usually layer-upon-layer, to create objects from 3D model data. The benefits of this methodology include new
design freedom, removal of tooling requirements, and economic low volumes. AM consists of various technologies to process versatile
materials, and for many years its dominant application has been the manufacture of prototypes, or Rapid prototyping. However, the recent
growth in applications for direct part manufacture, or Rapid Manufacturing, has resulted in much research effort focusing on development of
new processes and materials. This study focuses on the implementation process of AM and is motivated by the lack of socio-technical studies
in this area. It addresses the need for existing and potential future AM project managers to have an implementation framework to guide their
efforts in adopting this new and potentially disruptive technology class to produce high value products and generate new business
opportunities.
Selected applications demonstrate how polymer-based AM is being exploited in lightweight engineering, architecture, food processing, optics,
energy technology, dentistry, drug delivery, and personalized medicine. Unparalleled by metals and ceramics, polymer-based AM plays a key
role in the emerging AM of advanced multifunctional and multimaterial systems including living biological systems as well as life-like
synthetic systems.
Citation
M. SAADI Houcine, (2023-05-18), "Bibliographic study in Additive Manufacturing", [international] Advances In Additive Manufactoring Conference , Hammamet , Tunisia
Etude Phytochimique et Biologique des extraits de Roemeria hybrida et Glaucium corniculatum
Dans la plante glaucium corniculatum, six alcaloïdes ont étaient signalés, Selon le calcul de la constante Rf la majeure partie de la teneur en alcaloïdes était constituée d'allocryptotine.
Citation
M. SAADI Houcine, (2017-10-27), "Etude Phytochimique et Biologique des extraits de Roemeria hybrida et Glaucium corniculatum", [international] séminaire international sur: Phytodiversité et plantes d'intéret ecologique et économique en Algérie , inventaire, concervation et valorisation , M'sila, Algérie
COMPARATIVE STUDY OF ALKALOID PROFILE OF THREE HYPECOUM SPECIES
Mediterranean region, Central Asia and China. The plants are used in Tibetan medicine as an
antipyretic, analgesic and anti-inflammatory remedy [1]. The plants are known for their
biologically and pharmacologically active isoquinoline alkaloids, such as protopines,
protoberberines, aporphines, benzophenantridines, spirobenzylisoquinolines and secoberbines
[2].
Alkaloid profiles of Hypecoum pendulum L. (Algeria), Hypecoum procumbens L.
(Bulgaria) and Hypecoum ponticum Velen. (Bulgaria) - an endemic species for the Balkan
region, were investigated and 10 isoquinoline alkaloids were determined. The main alkaloid
of tertiary alkaloid mixtures in all analyzed samples were protopine. From quaternary alkaloid
mixtures of Hypecoum procumbens and Hypecoum ponticum were identified the alkaloids N-
methilcanadine and N-methylstylopine. These alkaloids were found for the first time from the
species Hypecoum ponticum.
One new natural alkaloid with quaternary structure was isolated from Hypecoum
ponticum and its structure was determined on the basis of detailed spectroscopic analysis,
including1D and 2D NMR and EI MS
Citation
M. SAADI Houcine, (2017-10-18), "COMPARATIVE STUDY OF ALKALOID PROFILE OF THREE HYPECOUM SPECIES", [international] 3th International Conference of Natural Product Utilization: From Plants to Pharmacy Shel , Bansko, Bulgaria