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Titre : Etude des metamateriaux et leurs applications dans les systemes micro-ondes. Type de document : texte imprimé Auteurs : soumia Gamouh, Auteur ; Abdelhafid Chaabi, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 127 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Biocapteurs MICRO-ONDES métamatériaux Index. décimale : 621 Electronique Résumé : Metamaterials are gaining momentum in recent years. The new properties allow to consider the
development of new electronic components for new applications.
The use of these materials offers advantages such as reducing weight and bulk, which is beneficial
for their integration into an electronic system.
In this thesis, we are focused in the simulation of the microwaves metamaterial devices. Various
components (antennas, biosensors) were designed, simulation was made using software HFSS.
This work is structured around two major axes: The first axis deals with the design of me
tamaterials inspired – antennas. The results obtained show a multifrequency comportment as well as
obtaining radiation patterns of different shapes, which allows these structures to be good candidates
for applications in wireless communication systems. The second axis presents metamaterial-based
biosensor. Simplicity and speed of analysis are the main advantages of a biosensorDiplôme : Doctorat en sciences En ligne : ../theses/electronique/GAM7129.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10473 Etude des metamateriaux et leurs applications dans les systemes micro-ondes. [texte imprimé] / soumia Gamouh, Auteur ; Abdelhafid Chaabi, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 127 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Biocapteurs MICRO-ONDES métamatériaux Index. décimale : 621 Electronique Résumé : Metamaterials are gaining momentum in recent years. The new properties allow to consider the
development of new electronic components for new applications.
The use of these materials offers advantages such as reducing weight and bulk, which is beneficial
for their integration into an electronic system.
In this thesis, we are focused in the simulation of the microwaves metamaterial devices. Various
components (antennas, biosensors) were designed, simulation was made using software HFSS.
This work is structured around two major axes: The first axis deals with the design of me
tamaterials inspired – antennas. The results obtained show a multifrequency comportment as well as
obtaining radiation patterns of different shapes, which allows these structures to be good candidates
for applications in wireless communication systems. The second axis presents metamaterial-based
biosensor. Simplicity and speed of analysis are the main advantages of a biosensorDiplôme : Doctorat en sciences En ligne : ../theses/electronique/GAM7129.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10473 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité GAM/7129 GAM/7129 Thèse Bibliothèque principale Thèses Disponible
Titre : Interaction ondes électromagnétiques polymères : comportement des resines epoxydes sous rayonnement micro-onde continu oupulsé- Application au composites epoxyde/poudre d'argent Type de document : texte imprimé Auteurs : Nadir Beldjoudi ; Université Paul Sabatier, Éditeur scientifique ; A. Gourdenne, Directeur de thèse Année de publication : 1988 Importance : 132 p. Note générale : 01 Disponible au magazin de la B.U.C. Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Micro-ondes Mode continu Mode pulsé Résines époxydes relaxation dipolaire Relaxation segmentale Transition vitreuse Transition énergétique Percolation électrique Composition époxy/poudre d'argent Index. décimale : 530 Physique Permalink : index.php?lvl=notice_display&id=3284 Interaction ondes électromagnétiques polymères : comportement des resines epoxydes sous rayonnement micro-onde continu oupulsé- Application au composites epoxyde/poudre d'argent [texte imprimé] / Nadir Beldjoudi ; Université Paul Sabatier, Éditeur scientifique ; A. Gourdenne, Directeur de thèse . - 1988 . - 132 p.
01 Disponible au magazin de la B.U.C.
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Micro-ondes Mode continu Mode pulsé Résines époxydes relaxation dipolaire Relaxation segmentale Transition vitreuse Transition énergétique Percolation électrique Composition époxy/poudre d'argent Index. décimale : 530 Physique Permalink : index.php?lvl=notice_display&id=3284 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEL/1601 BEL/1601 Thèse Bibliothèque principale Thèses Disponible Modélisation bidimensionnelle de la propagation sur les lignes couplées micro-ondes montées sur diélectrique et semiconducteur / Omar Tekkouk
Titre : Modélisation bidimensionnelle de la propagation sur les lignes couplées micro-ondes montées sur diélectrique et semiconducteur Type de document : texte imprimé Auteurs : Omar Tekkouk ; Univ. de Constantine, Éditeur scientifique ; Malek Benslama, Directeur de thèse Année de publication : 1998 Importance : 98 f. Note générale : 2 Disponibles au magasin de la bibliothèque centrale Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Propagation Modélisation bidimensionnelle Micro-ondes Index. décimale : 621 Electronique Permalink : index.php?lvl=notice_display&id=2472 Modélisation bidimensionnelle de la propagation sur les lignes couplées micro-ondes montées sur diélectrique et semiconducteur [texte imprimé] / Omar Tekkouk ; Univ. de Constantine, Éditeur scientifique ; Malek Benslama, Directeur de thèse . - 1998 . - 98 f.
2 Disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Propagation Modélisation bidimensionnelle Micro-ondes Index. décimale : 621 Electronique Permalink : index.php?lvl=notice_display&id=2472 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité TEK/3143 TEK/3143 Thèse Bibliothèque principale Thèses Disponible
Titre : Traitement par détente instantanée contrôlée ou micro-ondes des protéines de blé : Incidences sur les propriétés structurales, fonctionnelles et l’immunoréactivité du gluten. Type de document : texte imprimé Auteurs : Hamida Mahroug, Auteur ; Leila Benatallah, Directeur de thèse ; Gilberto Igrejas, Directeur de thèse Mention d'édition : 14 /01/ 2021 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 157 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Technologie Alimentaire: Sciences Alimentaires protéines de gluten du blé DIC Micro-ondes structure immunoréactivité propriétés fonctionnelles méthodologie de surface de réponse maladie cœliaque Wheat gluten proteins Microwaves immunoreactivity functional properties response surface methodology celiac disease غلوتين القمح الاسترخاء الفوري الخاضع للرقابة الميكروويف البنية الاستجابة المناعي الخواص الوظيفية، منهجية الاستجابة السطحية مرض السيلياك Index. décimale : 640 Industrie Alimentaire Résumé :
The aim of this thesis was to study the effects induced by Instant Controlled Pressure Drop (DIC) and microwaves on the functional, structural and immunological properties of wheat gluten proteins in order to diversify foods for people suffering from celiac disease. The response surface methodology was applied to study the linear, quadratic and interaction effects of the factors involved. In the first part, the gluten powder prepared from the wheat flour was treated by the DIC according to central composite design with two factors, temperature between 100 and 165 ° C and time between 20 and 60 s. Gluten proteins DIC treated were separated by SDS-PAGE and two-dimensional electrophoresis. In addition, the content of free thiols, solubility, emulsifying and foaming capacity and immunoreactivity were measured. In the same part, the prepared gluten powder and three types of wheat-based breads were processed by another more intense central composite design, temperature between 100 and 165 ° C and time between 40 and 120 s. The reactivity R 5 after peptic and tryptic digestion of these samples was measured. In the second part, the commercial gluten powder was processed by microwave according to central composite design with two factors, power between 200 and 1000 W and time between 20 and 60 s. After treatment, several parameters were measured such as the maximum temperature reached after the microwave treatment, the water content, the content of various gluten proteins, the content of free thiols, the abundance of the secondary structure and the macromolecular characteristics of polymers, extractability of gluten proteins, maximum resistance to extension (Rmax), total extensibility (Ext) and R5 reactivity after peptic and tryptic digestion. Electrophoretic separation was also carried out. After DIC treatment, wheat gluten became rigid, which is due to a significant increase in β structures. A significant loss of α-helices and a significant increase in intermolecular β-sheets and the rearrangement of disulfide bonds signify the denaturation of wheat gluten proteins. The rheological properties were totally lost after DIC treatment. However, the primary structure was not affected. The DIC treatment affected functional properties. The lowest protein solubility, emulsifying capacity and foaming capacity were obtained under the highest DIC processing conditions (165 ° C, 60 s). The immunoreactivity of anti-gliadin IgA celiac antibodies in wheat gluten treated with DIC was increased overall. The increase in toxic epitopes of gluten and DIC-treated breads demonstrated the inability of this treatment to reduce their immunoreactivity. Regarding the microwave treatment, the water content decreased and the temperature of the glutens measured after treatment increased. The content of extractable gliadins was affected by this treatment, while the content of extractable glutenins was not. The alteration of the secondary structure is related to the disaggregation of the polymers observed. In addition, microwave treatment increased the amount of potentially toxic epitopes released after digestion, showing the ineffectiveness of this treatment in detoxifying gluten for patients with celiac disease.
Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/agronomie/MAH7707.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11541 Traitement par détente instantanée contrôlée ou micro-ondes des protéines de blé : Incidences sur les propriétés structurales, fonctionnelles et l’immunoréactivité du gluten. [texte imprimé] / Hamida Mahroug, Auteur ; Leila Benatallah, Directeur de thèse ; Gilberto Igrejas, Directeur de thèse . - 14 /01/ 2021 . - جامعة الإخوة منتوري قسنطينة, 2021 . - 157 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Technologie Alimentaire: Sciences Alimentaires protéines de gluten du blé DIC Micro-ondes structure immunoréactivité propriétés fonctionnelles méthodologie de surface de réponse maladie cœliaque Wheat gluten proteins Microwaves immunoreactivity functional properties response surface methodology celiac disease غلوتين القمح الاسترخاء الفوري الخاضع للرقابة الميكروويف البنية الاستجابة المناعي الخواص الوظيفية، منهجية الاستجابة السطحية مرض السيلياك Index. décimale : 640 Industrie Alimentaire Résumé :
The aim of this thesis was to study the effects induced by Instant Controlled Pressure Drop (DIC) and microwaves on the functional, structural and immunological properties of wheat gluten proteins in order to diversify foods for people suffering from celiac disease. The response surface methodology was applied to study the linear, quadratic and interaction effects of the factors involved. In the first part, the gluten powder prepared from the wheat flour was treated by the DIC according to central composite design with two factors, temperature between 100 and 165 ° C and time between 20 and 60 s. Gluten proteins DIC treated were separated by SDS-PAGE and two-dimensional electrophoresis. In addition, the content of free thiols, solubility, emulsifying and foaming capacity and immunoreactivity were measured. In the same part, the prepared gluten powder and three types of wheat-based breads were processed by another more intense central composite design, temperature between 100 and 165 ° C and time between 40 and 120 s. The reactivity R 5 after peptic and tryptic digestion of these samples was measured. In the second part, the commercial gluten powder was processed by microwave according to central composite design with two factors, power between 200 and 1000 W and time between 20 and 60 s. After treatment, several parameters were measured such as the maximum temperature reached after the microwave treatment, the water content, the content of various gluten proteins, the content of free thiols, the abundance of the secondary structure and the macromolecular characteristics of polymers, extractability of gluten proteins, maximum resistance to extension (Rmax), total extensibility (Ext) and R5 reactivity after peptic and tryptic digestion. Electrophoretic separation was also carried out. After DIC treatment, wheat gluten became rigid, which is due to a significant increase in β structures. A significant loss of α-helices and a significant increase in intermolecular β-sheets and the rearrangement of disulfide bonds signify the denaturation of wheat gluten proteins. The rheological properties were totally lost after DIC treatment. However, the primary structure was not affected. The DIC treatment affected functional properties. The lowest protein solubility, emulsifying capacity and foaming capacity were obtained under the highest DIC processing conditions (165 ° C, 60 s). The immunoreactivity of anti-gliadin IgA celiac antibodies in wheat gluten treated with DIC was increased overall. The increase in toxic epitopes of gluten and DIC-treated breads demonstrated the inability of this treatment to reduce their immunoreactivity. Regarding the microwave treatment, the water content decreased and the temperature of the glutens measured after treatment increased. The content of extractable gliadins was affected by this treatment, while the content of extractable glutenins was not. The alteration of the secondary structure is related to the disaggregation of the polymers observed. In addition, microwave treatment increased the amount of potentially toxic epitopes released after digestion, showing the ineffectiveness of this treatment in detoxifying gluten for patients with celiac disease.
Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/agronomie/MAH7707.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11541 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MAH/7707 MAH/7707 Thèse Bibliothèque principale Thèses Disponible
Titre : (2.45 GHz) دراسة التسخين بأمواج الميكرو تطبيق في تحضير الأكاسيد Type de document : texte imprimé Auteurs : فیصل عواجة, Auteur ; محمد الطاهر بن لحرش, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2008 Importance : 139 ورقة. Note générale : 1نسخة موجودة في قاعة المطالعة
2نسخ موجودة في مخزن المكتبة المركزيةLangues : Arabe (ara) Catégories : Arabe
الفيزياءTags : علوم المواد:الخزفيات موجات المیكرو عنصر التسخین بموجات المیكرو سسیبتور العزل الحراري اختبار التسخین الخواص العزلیة Microwave Microwave heating element Susceptor Insulation system dielectric proprieties BaTiO3-Fe2O3 Micro-ondes Elément Chauffant à Micro-ondes Suscepteur Système d’isolation thermique propriété diélectrique Index. décimale : 530 الفيزياء Résumé : In this work we have improved, and adapted a domestic microwave oven working under 2.45 GHz, to lead us to reach high temperatures. The heat system is constituted essentially with susceptor (heating element) and heat insulating system. We have made the heating element (susceptor) in a cylinder shape from industrial silicone carbide material (SiC) essentially, with improving his characteristics ( for better interaction with microwave ) by adding different rates of manganese oxide (MnO2) ( 2 % , 5 % , 10 % ), and study the influence of this adds on susceptor heating and on his dielectric proprieties which are relative dielectric constant and dielectric loss angle . The results obtained show that the temperature of heating reaches nearly 1500°C in 10 minutes in the case of heating element prepared from industrial SiC doped with 5 % of manganese oxide and that the same heating element is able to reach more than 1500°C in less than 6 minutes by changing the heat insulating system by another, where we find the relative dielectric constant reaches 1823 and the dielectric loss angle reaches 2.05, under room temperature ( 30 °C ). in the case of the heat element is prepared from industrial SiC only ,we reach just 1268 °C in 10 minutes with the existence of heat spots where reaching this temperature , the relative dielectric constant where 135 And the dielectric loss angle where 0.158 Under room temperature. We have also studied many dimensions which can control and influence on microwave heating by a way or another like heating element density, influence of the wide and thickness of heating insulation system, using supply with different power out and ranging temperature into heating element. In the end the heating system where used to sinter simples from Barium titanate (BaTiO3) adding to it 3 different rates (7 % , 15 % , 20 % ) of iron oxide ( Fe2O3) at 1200 °C along 10 minutes, to study the characteristics ( density , phases , dielectric proprieties ) of the resulting compound and compare it with the traditional processing at 1300 °C along 2 hours. Diplôme : Magistère En ligne : ../theses/physique/AAWA2326.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=8636 (2.45 GHz) دراسة التسخين بأمواج الميكرو تطبيق في تحضير الأكاسيد [texte imprimé] / فیصل عواجة, Auteur ; محمد الطاهر بن لحرش, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2008 . - 139 ورقة.
1نسخة موجودة في قاعة المطالعة
2نسخ موجودة في مخزن المكتبة المركزية
Langues : Arabe (ara)
Catégories : Arabe
الفيزياءTags : علوم المواد:الخزفيات موجات المیكرو عنصر التسخین بموجات المیكرو سسیبتور العزل الحراري اختبار التسخین الخواص العزلیة Microwave Microwave heating element Susceptor Insulation system dielectric proprieties BaTiO3-Fe2O3 Micro-ondes Elément Chauffant à Micro-ondes Suscepteur Système d’isolation thermique propriété diélectrique Index. décimale : 530 الفيزياء Résumé : In this work we have improved, and adapted a domestic microwave oven working under 2.45 GHz, to lead us to reach high temperatures. The heat system is constituted essentially with susceptor (heating element) and heat insulating system. We have made the heating element (susceptor) in a cylinder shape from industrial silicone carbide material (SiC) essentially, with improving his characteristics ( for better interaction with microwave ) by adding different rates of manganese oxide (MnO2) ( 2 % , 5 % , 10 % ), and study the influence of this adds on susceptor heating and on his dielectric proprieties which are relative dielectric constant and dielectric loss angle . The results obtained show that the temperature of heating reaches nearly 1500°C in 10 minutes in the case of heating element prepared from industrial SiC doped with 5 % of manganese oxide and that the same heating element is able to reach more than 1500°C in less than 6 minutes by changing the heat insulating system by another, where we find the relative dielectric constant reaches 1823 and the dielectric loss angle reaches 2.05, under room temperature ( 30 °C ). in the case of the heat element is prepared from industrial SiC only ,we reach just 1268 °C in 10 minutes with the existence of heat spots where reaching this temperature , the relative dielectric constant where 135 And the dielectric loss angle where 0.158 Under room temperature. We have also studied many dimensions which can control and influence on microwave heating by a way or another like heating element density, influence of the wide and thickness of heating insulation system, using supply with different power out and ranging temperature into heating element. In the end the heating system where used to sinter simples from Barium titanate (BaTiO3) adding to it 3 different rates (7 % , 15 % , 20 % ) of iron oxide ( Fe2O3) at 1200 °C along 10 minutes, to study the characteristics ( density , phases , dielectric proprieties ) of the resulting compound and compare it with the traditional processing at 1300 °C along 2 hours. Diplôme : Magistère En ligne : ../theses/physique/AAWA2326.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=8636 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité عوا/2326 عوا/2326 Thèse Bibliothèque principale Thèses Disponible 
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