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Developpement mathematique et applications de la gravitation quantique a boucles
(2016-01-02)Loop Quantum gravity is a tentative theory to describe the quantum structure of spacetime at the Planck scale, the scale at which both general relativity and quantum theory manifest equally. The theory comes in three versions: ... -
Dégradation de produits pharmaceutiques photoinduite par les oxychlorures de bismuth et par les ions persulfate dans le compartiment aquatique
(2016-09-29)"This work is a contribution to the elimination of three pharmaceutical compounds from different therapeutic classes: carbamazepine (anti-epileptic), diclofenac (antiinflammatory) and venlafaxine (anti-depressor) by ... -
Etude phytochimique et évaluation des activités biologiques des espèces
(Universite des freres mentouri constantine, 2016-10-10)This present work concerns the phytochemical and biological study of three Algerian plants belonging to the Lamiaceae family : Mentha aquatica L., Stachys guyoniana de Noé and Thymus dreatensis Batt. Chromatographic ... -
Synthèse et propriétés d’organo-chélates tinctoriaux
(جامعة الإخوة منتوري قسنطينة, 2016-10-27)This doctoral thesis is devoted to the study of azo dyes and their organometallic complexes, which are a particular class of chemistry whose importance and interest to remain our considerable days. The dye industry is ... -
Etude phytochimique et evaluation biologique de l’espèce senecio delphinifolius Vahl
(جامعة الإخوة منتوري قسنطينة, 2016-10-30)Although Senecio species are known as sources of potentially toxic pyrrolizidine alkaloids (PAs), some species of this genus are traditionally used as remedies. In this work the evaluation of biological activities and the ... -
تحسين الخصائص الميكانيكية و البيوحيوية للهيدروكسيأباتيت الطبيعي
(جامعة الإخوة منتوري قسنطينة, 2016-11-02)The main objective of this research is to study the hydroxyapatite (HA: Ca10(PO4)6(OH)2,) which was extracted from cortical bovine. This latter because of both its abundance and high purity may be considered as an exciting ... -
Réalisation de dispositifs microélectroniques à base de films organiques
(Universite des freres mentouri constantine, 2016-11-08)This thesis focuses on the realization of microelectronic devices based on organic materials. In order to develop next generation devices those have applications in the topic of solarphotovoltaic energy. Organic semiconductors ... -
Contribution à l’étude de l’implantation des ions de carbone dans le silicium
(Universite des freres mentouri constantine, 2016-11-17)In this work, we studied the ion implantation of carbon in silicon by simulation and experimentally. Several phenomena related to carbon implantation in Si (100) were simulated using two codes: Trim and Crystal ... -
Degradation d’un polluant organique (herbicide) photocatalysee par des materiaux inorganiques vierges et dopes par la lumiere artificielle et solaire en solution aqueuse
(جامعة الإخوة منتوري قسنطينة, 2016-11-17)This doctoral work focused on the study of the elimination of an herbicide, the linuron, in aqueous phase, using various degradation processes especially iron oxides. The aim is to apply these methods for the depollution ... -
Caractérisation de la pollution de l'air par les particules et les éléments métalliques dans la ville de Constantine
(Universite des freres mentouri constantine, 2016-11-24)The measurement of fine dust in Constantine has never been carried out so far. It is, therefore, of utmost importance to address this problem in order to estimate particulate matter (PM) concentration levels, to assess ... -
Simulation numérique des transferts de chaleur et de masse en milieux poreux saturés de fluide dans différents espaces annulaires
(2016-11-27)The heat and mass transfer by laminar and steady natural convection in two-dimensional horizontal elliptical annular space filled with a fluid-saturated porous medium is analyzed numerically using our calculation code ... -
Contribution phytochimique à la valorisation de deux plantes médicinales
(2016-12-05)In this thesis, aerial parts of two plants belong to Asteraceae family were studied. The first is Echinops spinosus, species distributed around the world and is commonly used in the treatment of various diseases. The ... -
Transfert convectif dans une cavité totalement ou partiellement occupée par une matrice poreuse en ETL ou HETL
(2016-12-15)In this work, a numerical study of convective heat transfer in confined fluid and porous media was considered. The fluid flow is governed by the Navier–Stokes equations in the fluid region whereas the Darcy–Brinkman–Forchheimer ... -
Synthèses, caractérisation et étude des propriétés physiques de Complexes de coordination à base de dérivés dithiocarbazates
(جامعة الإخوة منتوري قسنطينة, 2017-01-04)The work described in this manuscript is part of the general problem of exploration possibilities to control synthesis and physical properties of coordination complexes based on transition metals and the 2-hydroxy-1,3- ... -
Etude phytochimique et biologique de l’espèce Tetraclinis articulata de la famille des Cupressaceae et Synthèse d’aminoacides et de peptides thioglycosylés par couplage de Buchwald-Hartwig
(2017-01-09)Our work is divised into two parts: phytochemical part and organic synthesis part. In the phytochemical part we studied the Anti-bacterial and analgesic activities of Tetraclinis articulata species of Cupressaceae family; ... -
Elaboration et étude de structures à base de couches minces de ZnO et de chalcogénures (CIS, CZTS) pour des applications photovoltaïques
(جامعة الإخوة منتوري قسنطينة, 2017-01-12)Among the most promising quaternary semiconductors for thin film solar cells fabrication is the Cu2ZnSnS4 (CZTS) material. Our choice in this thesis, to elaborate the CZTS thin films was related to the spray pyrolysis ... -
Etude des améliorations des nombres de nusselt par l’utilisation de nanofluides ou changement de la géométrie
(جامعة الإخوة منتوري قسنطينة, 2017-01-29)This Ph. D. thesis work reports the results of the study of the laminar forced convective heat transfer flow in two different geometries: A geometry made with two coaxial discs and a micro-channels heat sink. This study ... -
Etude de l’effet de l’addition et de la substitution dans les supraconducteurs a base de bismuth prépares par la méthode SOL-GEL
(جامعة الإخوة منتوري قسنطينة, 2017-01-29)Superconducting Bi2Sr2Ca1Cu2O8 ceramics samples have been prepared by Sol-Gel methods.The influences of the preparation conditions of compound oxide powder on structural and superconducting properties have been investigated. ... -
Investigation phytochimique et recherche d’activité biologique de deux espèces du genre Centaurea (Asteraceae)
(2017-01-30)This work is devoted to the phytochemical and biological study of two species of the genus Centaurea (Asteraceae), endemic to Algeria and has never been studied before. They are Centaurea choulettiana Pomel and Centaurea ... -
Etude phytochimique et biologique des espèces Chrysanthemum segetum L. (Asteraceae) et Limonium pruinosum (L.) Chaz. (Plumbaginaceae).
(جامعة الإخوة منتوري قسنطينة, 2017-02-15)This work was devoted to the phytochemical and biological studies of two plants species belonging to the Asteraceae family (Chrysanthemum segetum L.) and Plumbaginaceae family (Limonium pruinosum L.). The phytochemical ...
