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Titre : Les Molécules terpéniques(ecdystéroides)des fleurs de serratula cichoracea : recherche d'activités antimicrobienne et antioxydante Type de document : texte imprimé Auteurs : Habiba Larguet, Auteur ; Zahia Meraihi, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2011 Importance : 75 f. Format : 31 cm Note générale : Magister
2 copies imprimées disponiblesLangues : Français (fre) Catégories : Français - Anglais
BiologieTags : ecdystéroïdes activité antioxydante pouvoir antimicrobien Serratula Test DPPH. Biologie Index. décimale : 570 Sciences de la vie. Biologie En ligne : ../theses/biologie/LAR5924.pdf Permalink : index.php?lvl=notice_display&id=5707 Les Molécules terpéniques(ecdystéroides)des fleurs de serratula cichoracea : recherche d'activités antimicrobienne et antioxydante [texte imprimé] / Habiba Larguet, Auteur ; Zahia Meraihi, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2011 . - 75 f. ; 31 cm.
Magister
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : ecdystéroïdes activité antioxydante pouvoir antimicrobien Serratula Test DPPH. Biologie Index. décimale : 570 Sciences de la vie. Biologie En ligne : ../theses/biologie/LAR5924.pdf Permalink : index.php?lvl=notice_display&id=5707 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité LAR/5924 LAR/5924 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude botanique et phytochimique : Approche biologique et pharmacologique d'opuntia ficus indica Type de document : texte imprimé Auteurs : Sihem Halmi, Auteur ; Youcef Hamdi Pacha, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2015 Importance : 115 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Biotechnologies végétales "Opuntia ficus indica cytogénétique HPLC Activité antiradicalaire Pouvoir antimicrobien Toxicité Pharmacologie Potentiel allélopathique Cytogenetic Radical scavenging activity Antimicrobial power Toxicity Pharmacology Allelopathic potential الوراثة الخلوٌة النشاط المضاد للبكتٌرٌا السمٌة الدوائٌة كابح
الانباتIndex. décimale : 570 Sciences de la vie. Biologie Résumé : The prickly pear (Opuntia ficus indica), it’s cactus of the genus Opuntia, which contains a many medicinal properties.
The organization of the genome study of this species by using the conventional cytogenetics methods: acetic carmine and silver nitrate (AgNO3) staining, indicates that this species is octoploid 2n = 88 with a base number x = 11. The karyotype reveals the presence of three types of chromosome. The coloration with a silver nitrate indicates a number of nucleoli varies from 1 to 4 with a majority of one nucleolus per cell found that there is an active site.
Our work has focuses also on Opuntia ficus indica cladods extracts study. The analysis of these extracts by HPLC and colorimetric tests shows the presence of some chemical groups (total polyphenols) capable of expressing the desired activity. Theirs antiradical activities are evaluated through chemical tests such as hydrogen peroxide, hydroxyl radical, DPPH, FRAP scavenging tests and the phosphomolybdate method. The result shows a high reducing activity of certain extracts.
The antibacterial activity of this extracts is evaluated by the solid medium diffusion and the MIC is determined by the liquid medium dilution methods. The results show that the EAc has the highest power on the Staphylococcus aureus strain.
The results of toxicology tests performed in vitro and in vivo, on erythrocytes blood isolates, larvae, rats and rabbits indicate that this plant has very low toxicity.
The various pharmacological tests perform in vivo of the aqueous extract of Opuntia ficus indica shows that it has important properties: hypoglycemic, very significant analgesic activity; using pain models induced by chemical and thermal stimuli, better wound contraction during the inflammatory response and the proliferative phase, and also it causes a significant improvement in hepatic antioxidant status in rats there were liver toxicity induced by CCL4.
Allelopathic compounds detected in the cladods of prickly pear are phenolic compounds that have an inhibitory effect on the germination and growth of the target plant.
Diplôme : Doctorat en sciences En ligne : ../theses/biologie/HAL6732.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9891 Etude botanique et phytochimique : Approche biologique et pharmacologique d'opuntia ficus indica [texte imprimé] / Sihem Halmi, Auteur ; Youcef Hamdi Pacha, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2015 . - 115 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Biotechnologies végétales "Opuntia ficus indica cytogénétique HPLC Activité antiradicalaire Pouvoir antimicrobien Toxicité Pharmacologie Potentiel allélopathique Cytogenetic Radical scavenging activity Antimicrobial power Toxicity Pharmacology Allelopathic potential الوراثة الخلوٌة النشاط المضاد للبكتٌرٌا السمٌة الدوائٌة كابح
الانباتIndex. décimale : 570 Sciences de la vie. Biologie Résumé : The prickly pear (Opuntia ficus indica), it’s cactus of the genus Opuntia, which contains a many medicinal properties.
The organization of the genome study of this species by using the conventional cytogenetics methods: acetic carmine and silver nitrate (AgNO3) staining, indicates that this species is octoploid 2n = 88 with a base number x = 11. The karyotype reveals the presence of three types of chromosome. The coloration with a silver nitrate indicates a number of nucleoli varies from 1 to 4 with a majority of one nucleolus per cell found that there is an active site.
Our work has focuses also on Opuntia ficus indica cladods extracts study. The analysis of these extracts by HPLC and colorimetric tests shows the presence of some chemical groups (total polyphenols) capable of expressing the desired activity. Theirs antiradical activities are evaluated through chemical tests such as hydrogen peroxide, hydroxyl radical, DPPH, FRAP scavenging tests and the phosphomolybdate method. The result shows a high reducing activity of certain extracts.
The antibacterial activity of this extracts is evaluated by the solid medium diffusion and the MIC is determined by the liquid medium dilution methods. The results show that the EAc has the highest power on the Staphylococcus aureus strain.
The results of toxicology tests performed in vitro and in vivo, on erythrocytes blood isolates, larvae, rats and rabbits indicate that this plant has very low toxicity.
The various pharmacological tests perform in vivo of the aqueous extract of Opuntia ficus indica shows that it has important properties: hypoglycemic, very significant analgesic activity; using pain models induced by chemical and thermal stimuli, better wound contraction during the inflammatory response and the proliferative phase, and also it causes a significant improvement in hepatic antioxidant status in rats there were liver toxicity induced by CCL4.
Allelopathic compounds detected in the cladods of prickly pear are phenolic compounds that have an inhibitory effect on the germination and growth of the target plant.
Diplôme : Doctorat en sciences En ligne : ../theses/biologie/HAL6732.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9891 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité HAL/6732 HAL/6732 Thèse Bibliothèque principale Thèses Disponible Évaluation des activités biologiques des huiles essentielles du citron (Citrus limon) / Louiza Himed
Titre : Évaluation des activités biologiques des huiles essentielles du citron (Citrus limon) : encapsulation et application comme agent conservateur à la margarine allégée. Type de document : texte imprimé Auteurs : Louiza Himed, Auteur ; Malika Barkat, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 142 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Huile essentielle Citrus limon Hydrodistillation Pression à froid Pouvoir antioxydant Pouvoir antimicrobien Encapsulation Margarine allégée Essential oil Cold pressure Antioxidant power Antimicrobial power Lightened margarine زيت أساسي ضغط بارد مضادة للأكسدة قوة مضادة للميكروبات تغليف المارغرين الخفيف Index. décimale : 640 Industrie Alimentaire Résumé : The main objective of this work is to test the encapsulated essential oils in order to solve the problem of their instability, and apply them in light margarine in order to follow its oxidative stability and to evaluate its acceptability. The essential oils were extracted by hydrodistillation and cold pressing from two varieties of
Citrus limon: Eureka and Lisbon. Recovered oils were analyzed by GC/MS to identify their constituents. As main results obtained, the extraction yield was greater by hydrodistillation than by cold pressure. The composition of the oils extracted was different but it was characterized by a dominance of monoterpenes, followed by oxygenated monoterpenes and then sesquiterpenes and finally oxygenated sesquiterpenes. High levels of limonene were
recorded (61% - 67%). The antioxidant activity of the extracted oils was evaluated by several tests, namely the test for the inhibition of lipid peroxidation (β-carotene bleaching and the β-carotene qualitative test), the free radical scavenging test (DPPH and ABTS+), the test of the reducing power (CUPRAC and FRAP) and finally the test of the chelating power. The results obtained showed an interesting antioxidant power of Eureka oils extracted by cold pressure compared to other oils. On the other hand, the chelating power was less important for all oils compared with EDTA. The antimicrobial power of the oils was evaluated by two tests to determine the susceptibility of the strains and the microbiological parameters CMI, CMB and CMF. The strains tested are of 15, including 9 bacterial strains (2 Gram positive and 7 Gram negative) and 6 fungal strains. The results showed that all strains are sensitive and the oils have interesting antimicrobial properties. The essential oils of the Eureka variety extracted by cold pressing, having the best antioxidant power, were encapsulated in amorphous silica and then characterized by SEM, ATR and TGA and an evaluation of ther antioxidant power. The results showed a significant encapsulation efficiency of 95.87%. No interaction between oils and SiO2 has been reported. On the other hand, a thermogravimetric resistant of the encapsulated oils was noticed compared to the free oils. The antioxidant activity of essential oils was not changed after encapsulation. Three formulas of light margarine were developed: control margarine (CM), free essential oil margarine (FOM) and encapsulated oils margarine (EOM). A physico-chemical characterization, a determination of the resistance to forced oxidation and sensory analysis
were carried out. The results showed that the physico-chemical characteristics of margarines with essential oils are in accordance with the standards and the pre-established recipe and are not different from those of the control. The EOM showed resistance to forced oxidation comparable to that of the control (CM), however the resistance of the FOM is not interesting. The tasters of the three formulas showed a preference of the FOM, then of the EOM and finally of the CM. Therefore it would be interesting to proceed with the industrial formulation
of a lemon essential oil margarine.
Diplôme : Doctorat en sciences En ligne : ../theses/agronomie/HIM7332.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10982 Évaluation des activités biologiques des huiles essentielles du citron (Citrus limon) : encapsulation et application comme agent conservateur à la margarine allégée. [texte imprimé] / Louiza Himed, Auteur ; Malika Barkat, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 142 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Huile essentielle Citrus limon Hydrodistillation Pression à froid Pouvoir antioxydant Pouvoir antimicrobien Encapsulation Margarine allégée Essential oil Cold pressure Antioxidant power Antimicrobial power Lightened margarine زيت أساسي ضغط بارد مضادة للأكسدة قوة مضادة للميكروبات تغليف المارغرين الخفيف Index. décimale : 640 Industrie Alimentaire Résumé : The main objective of this work is to test the encapsulated essential oils in order to solve the problem of their instability, and apply them in light margarine in order to follow its oxidative stability and to evaluate its acceptability. The essential oils were extracted by hydrodistillation and cold pressing from two varieties of
Citrus limon: Eureka and Lisbon. Recovered oils were analyzed by GC/MS to identify their constituents. As main results obtained, the extraction yield was greater by hydrodistillation than by cold pressure. The composition of the oils extracted was different but it was characterized by a dominance of monoterpenes, followed by oxygenated monoterpenes and then sesquiterpenes and finally oxygenated sesquiterpenes. High levels of limonene were
recorded (61% - 67%). The antioxidant activity of the extracted oils was evaluated by several tests, namely the test for the inhibition of lipid peroxidation (β-carotene bleaching and the β-carotene qualitative test), the free radical scavenging test (DPPH and ABTS+), the test of the reducing power (CUPRAC and FRAP) and finally the test of the chelating power. The results obtained showed an interesting antioxidant power of Eureka oils extracted by cold pressure compared to other oils. On the other hand, the chelating power was less important for all oils compared with EDTA. The antimicrobial power of the oils was evaluated by two tests to determine the susceptibility of the strains and the microbiological parameters CMI, CMB and CMF. The strains tested are of 15, including 9 bacterial strains (2 Gram positive and 7 Gram negative) and 6 fungal strains. The results showed that all strains are sensitive and the oils have interesting antimicrobial properties. The essential oils of the Eureka variety extracted by cold pressing, having the best antioxidant power, were encapsulated in amorphous silica and then characterized by SEM, ATR and TGA and an evaluation of ther antioxidant power. The results showed a significant encapsulation efficiency of 95.87%. No interaction between oils and SiO2 has been reported. On the other hand, a thermogravimetric resistant of the encapsulated oils was noticed compared to the free oils. The antioxidant activity of essential oils was not changed after encapsulation. Three formulas of light margarine were developed: control margarine (CM), free essential oil margarine (FOM) and encapsulated oils margarine (EOM). A physico-chemical characterization, a determination of the resistance to forced oxidation and sensory analysis
were carried out. The results showed that the physico-chemical characteristics of margarines with essential oils are in accordance with the standards and the pre-established recipe and are not different from those of the control. The EOM showed resistance to forced oxidation comparable to that of the control (CM), however the resistance of the FOM is not interesting. The tasters of the three formulas showed a preference of the FOM, then of the EOM and finally of the CM. Therefore it would be interesting to proceed with the industrial formulation
of a lemon essential oil margarine.
Diplôme : Doctorat en sciences En ligne : ../theses/agronomie/HIM7332.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10982 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité HIM/7332 HIM/7332 Thèse Bibliothèque principale Thèses Disponible
