| Titre : |
Activités biologiques d'une nanoémulsion de l'huile essentielle de Lavandula stoechas |
| Type de document : |
texte imprimé |
| Auteurs : |
Nour Hane Imamouine, Auteur ; Chaima Merrouche, Auteur ; Cheimaa Bouchekouk, Auteur |
| Editeur : |
Tipaza [Algérie] : Centre universitaire Morsli Abdellah - Tipaza- |
| Année de publication : |
2024/2025 |
| Importance : |
p.64 |
| Présentation : |
couv. en noir et blanc ., ill., fig.,tabl. |
| Format : |
30 cm |
| Accompagnement : |
CD |
| Note générale : |
Bibliographie: p53-62. |
| Langues : |
Français (fre) |
| Catégories : |
Microbiologie
|
| Mots-clés : |
Lavandula stoechas Hydrodistillation Gas Chromatography–Mass Spectrometry Nanoemulsion Biological Activities. |
| Index. décimale : |
579.33 |
| Résumé : |
Nanoemulsions (NEs) are protective and stabilizing systems used to enhance the properties of essential oils. This experimental work compares the biological activities of Lavandula stoechas essential oil (EO) with those of its nanoformulation. The EO was extracted by hydrodistillation using a Clevenger apparatus, then analyzed by gas chromatography–mass spectrometry (CG-MS) to determine its chemical composition. Fenchone was identified as the major chemotype. The nanoemulsion was prepared by ultrasonic emulsification using Tween 80 as a surfactant.
The antimicrobial activity of both the EO and NE was evaluated using the aromatogram method against seven bacterial strains. The results showed relatively high activity. The EO exhibited strong antibacterial effects, with inhibition zones of 34.33 ± 0.58 mm against Staphylococcus aureus and 30.33 ± 4.62 mm against Acinetobacter baumannii, whereas the NE showed notable activity, with an inhibition zone of 17.67 ± 2.08 mm observed against S. aureus, except for Pseudomonas aeruginosa, which showed resistance. The microdilution method confirmed these observations. Both extracts were also tested against two filamentous fungi and one yeast. The EO demonstrated marked antifungal activity, with inhibition rates of 86.9% against Aspergillus niger and 84.52% against A. flavus. The NE also showed notable activity, reaching 71.43% and 73.81%, respectively, against the same strains, indicating antifungal potential. Antioxidant properties were assessed using the DPPH free radical scavenging method, with an IC₅₀ value above 1000 μg/mL, indicating mild antioxidant activity.
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Activités biologiques d'une nanoémulsion de l'huile essentielle de Lavandula stoechas [texte imprimé] / Nour Hane Imamouine, Auteur ; Chaima Merrouche, Auteur ; Cheimaa Bouchekouk, Auteur . - Tipaza [Algérie] : Centre universitaire Morsli Abdellah - Tipaza-, 2024/2025 . - p.64 : couv. en noir et blanc ., ill., fig.,tabl. ; 30 cm + CD. Bibliographie: p53-62. Langues : Français ( fre)
| Catégories : |
Microbiologie
|
| Mots-clés : |
Lavandula stoechas Hydrodistillation Gas Chromatography–Mass Spectrometry Nanoemulsion Biological Activities. |
| Index. décimale : |
579.33 |
| Résumé : |
Nanoemulsions (NEs) are protective and stabilizing systems used to enhance the properties of essential oils. This experimental work compares the biological activities of Lavandula stoechas essential oil (EO) with those of its nanoformulation. The EO was extracted by hydrodistillation using a Clevenger apparatus, then analyzed by gas chromatography–mass spectrometry (CG-MS) to determine its chemical composition. Fenchone was identified as the major chemotype. The nanoemulsion was prepared by ultrasonic emulsification using Tween 80 as a surfactant.
The antimicrobial activity of both the EO and NE was evaluated using the aromatogram method against seven bacterial strains. The results showed relatively high activity. The EO exhibited strong antibacterial effects, with inhibition zones of 34.33 ± 0.58 mm against Staphylococcus aureus and 30.33 ± 4.62 mm against Acinetobacter baumannii, whereas the NE showed notable activity, with an inhibition zone of 17.67 ± 2.08 mm observed against S. aureus, except for Pseudomonas aeruginosa, which showed resistance. The microdilution method confirmed these observations. Both extracts were also tested against two filamentous fungi and one yeast. The EO demonstrated marked antifungal activity, with inhibition rates of 86.9% against Aspergillus niger and 84.52% against A. flavus. The NE also showed notable activity, reaching 71.43% and 73.81%, respectively, against the same strains, indicating antifungal potential. Antioxidant properties were assessed using the DPPH free radical scavenging method, with an IC₅₀ value above 1000 μg/mL, indicating mild antioxidant activity.
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