https://dspace.univ-ouargla.dz/jspui/handle/123456789/3972 Wed, 17 Jun 2026 12:08:43 GMT 2026-06-17T12:08:43Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/5556 Titre: Etude des spectres d’émission d’ions d’argon lors de déposition sur couches minces dans un pulvérisateur cathodique magnétron Auteur(s): Mohammed AZZAOUI; Fethi KHELFAOUI Résumé: This study is devoted to the study of spectroscopy in discharge plasmas during deposition of thin films by RF magnetron sputtering. The chamber sputtering contains a target of Nylon 6.6 (Good Fellow). The study relates to electronic transitions of atoms and ions of argon, nitrogen molecules and nitrogen ions in plasma and determination of electron temperature and electron density of the plasma. The characterization of plasma indicates that the plasma discharge is not at local thermodynamic equilibrium. The results of our calculations are consistent with the experimental results of J. Kousal and al. (2009) [1]. Description: AST Annales des Sciences et Technologie Tue, 01 Jan 2013 00:00:00 GMT https://dspace.univ-ouargla.dz/jspui/handle/123456789/5556 2013-01-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/5560 Titre: Effet de PbCl2 sur les propriétés d’un verre phosphaté Auteur(s): Omar BENTOUILA; Ferhat REHOUMA; Kamel Eddine AIADI; Marcel POULAIN Résumé: Phosphate glasses with different compositions of PbCl2 were synthesized, differential thermal analysis was performed in order to determine the characteristic temperatures of these glasses and measurements of different glasses density have been performed. The results show that the addition of PbCl2 leads to a nearly linear decrease of the glass transition temperature Tg. They also show a linear increase of the density as a function of PbCl2 content. Description: AST Annales des Sciences et Technologie Tue, 01 Jan 2013 00:00:00 GMT https://dspace.univ-ouargla.dz/jspui/handle/123456789/5560 2013-01-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/5535 Titre: CORRECTION DES DÉFAUTS DE SABLAGE D’UN VERRE PAR DÉPOSITION DE COUCHES MINCES DE SILICE ET DE PVB Auteur(s): Hind LAOUAMRI; Mostafa KOLLI; Nourredine BOUAOUADJA Résumé: The aim of our work is to correct surface defects caused by the impacts of sand particles on the surface of a glass. The procedure consists to deposit a thin layer of silica by sol-gel technique. For this, soda-lime glass samples were sandblasted with different masses and subsequently thin transparent films were filed. The results show that when the sand mass increases, the number of defects and their size increase also. Optical transmission shows a significant drop. It changes from 91.4% (initial value) to 12.96% for a mass of 200g. Meanwhile, the total roughness increases from 0.65 to 11.75 μm. To correct the sandblasting defects, we synthesized a sol-gel solution based precursors SiO2 (TEOS) and we coated the samples. After drying in an oven heated at 50°C for 30 min, the samples were annealed at 550°C for 1 hour. The average thickness obtained for the deposited layers is very low (380-450) nm. Nevertheless, a significant improvement in the optical transmission has been observed (increase from 12.96 to 42.98%). But this last value is not sufficient. To increase again the thickness, another method is adopted. A polymer (PVB) is dissolved in an adequate solvent (DMF) and the obtained solution is deposited on the SiO2 layers. After drying at 60°C for 24 h, the average thickness obtained in this case is important enough (18.7 μm). This value exceeds the values of the total roughness. Finally, the optical transmission increases significantly up to 88% for Mp = 200 g. Description: AST Annales des Sciences et Technologie Tue, 01 Jan 2013 00:00:00 GMT https://dspace.univ-ouargla.dz/jspui/handle/123456789/5535 2013-01-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/5545 Titre: ANALYSE DE L’HUILE ESSENTIELLE DES PARTIES AERIENNES DE FERULA VESCERITENSIS COSS. ET DUR. DE LA LOCALITE DE SEBSEB Auteur(s): Karima DEHAK-OUGHLISSI; Roukia HAMMOUDI; Mahfoud HADJ-MAHAMMED; Yacine A; BADJAH-HADJ-AHMED Résumé: Essential oil from aerial parts of Ferula vesceritensis (Apiaceae) was analyzed by GC–FID and GC/MS. A total of 71 compounds representing 79 % of the oil were characterized. Sesquiterpenes (61.1 %) were the predominant fraction of this oil. Among them 37.4 % are oxygenated. Aristolon, aristolen, Ѓ-cadinol and α-cadinol were the major constituents with respectively the percentages of 14.1 %, 9.6 %, 5.1 % and 4.8 %.; : L’huile essentielle (HE) des parties aériennes de l’espèce Ferula vesceritensis a fait l’objet d’analyses par chromatographie en phase gazeuse seule (GC-FID) et couplée à la spectrométrie de masse (GC/MS). Un total de 71 composés représentant 79 % de la composition totale de cette huile ont été identifiés. Les sesquiterpènes (61.1%) constituent la fraction prépondérante de cette huile et dont 37.4 % sont oxygénés. L’aristolone, l’aristolène, le Ѓ-cadinol et l’α-cadinol constituent les quatre composés majoritaires avec des teneurs respectivement de 14.1 %, 9.6 %, 5.1 % et 4.8 %. Description: AST Annales des Sciences et Technologie Tue, 01 Jan 2013 00:00:00 GMT https://dspace.univ-ouargla.dz/jspui/handle/123456789/5545 2013-01-01T00:00:00Z