Evaluation of antimicrobial activity of Thymus vulgaris and Rosemarinus officinalis and their use in food preservation / Afaf Annane / Faculté des sciences de la nature et de la vie (2023)

Public ISBD Titre : Evaluation of antimicrobial activity of Thymus vulgaris and Rosemarinus officinalis and their use in food preservation Type de document : document électronique Auteurs : Afaf Annane, Auteur ; Rachid Sahraoui, Directeur de thèse Editeur : Faculté des sciences de la nature et de la vie Année de publication : 2023 Importance : 65 Feuilles ISBN/ISSN/EAN : MS/1720 Langues : Français Catégories : Thèse et mémoire:Master:Biotechnologie et valorisation des plantes Mots-clés : Methanolic extract,  Biological activity  Rosemarinus officinalis  Thymus vulgaris  Shelf life. Résumé : This work aims to study the antimicrobial activity of the crude extracts of two aromatic plants, Thymus vulgaris L. and Rosemarinus officinalis L., and an experiment on the manufacture of fresh cheese with the incorporation of the extract of these two plants and the study of its effect on the shelf life of the product. Plants were collected from the region of Sétif. The powder of plants was subjected to methanol solvent extraction which was used to determine the antimicrobial activity. The activity microbial was slightly positive on some strains of bacteria for rosemary methanolic extract, the results of the extract of Thymus vulgaris as a high antibacterial activity represented with inhibition diameter of 27mm on Staphylococcus aureus in concentration 50mg/ml. The effect of the methanolic extracts has been evaluated by the following: the evolution of the physic-ochemical and microbiological parameters during 18 days .of storage at 4°C, a change in odor, and the appearance of mold was noted on the control cheese and the rose-enriched cheese which was not the case for the enriched cheese. However, the results of the hygiene quality of the cheese showed that the addition of extract of thymus vulgaris to the fresh cheese has a slight effect on bacterial f1ora (TAMF) and extends the cheese shelf life. Evaluation of antimicrobial activity of Thymus vulgaris and Rosemarinus officinalis and their use in food preservation [document électronique] / Afaf Annane, Auteur ; Rachid Sahraoui, Directeur de thèse . - Setif, Algerie : Faculté des sciences de la nature et de la vie, 2023 . - 65 Feuilles. ISSN : MS/1720 Langues : Français Catégories : Thèse et mémoire:Master:Biotechnologie et valorisation des plantes Mots-clés : Methanolic extract,  Biological activity  Rosemarinus officinalis  Thymus vulgaris  Shelf life. Résumé : This work aims to study the antimicrobial activity of the crude extracts of two aromatic plants, Thymus vulgaris L. and Rosemarinus officinalis L., and an experiment on the manufacture of fresh cheese with the incorporation of the extract of these two plants and the study of its effect on the shelf life of the product. Plants were collected from the region of Sétif. The powder of plants was subjected to methanol solvent extraction which was used to determine the antimicrobial activity. The activity microbial was slightly positive on some strains of bacteria for rosemary methanolic extract, the results of the extract of Thymus vulgaris as a high antibacterial activity represented with inhibition diameter of 27mm on Staphylococcus aureus in concentration 50mg/ml. The effect of the methanolic extracts has been evaluated by the following: the evolution of the physic-ochemical and microbiological parameters during 18 days .of storage at 4°C, a change in odor, and the appearance of mold was noted on the control cheese and the rose-enriched cheese which was not the case for the enriched cheese. However, the results of the hygiene quality of the cheese showed that the addition of extract of thymus vulgaris to the fresh cheese has a slight effect on bacterial f1ora (TAMF) and extends the cheese shelf life.

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
MS/1720	BVP/CD36	DVD et CD	Bibliothèque SNV	Français	Disponible

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