Volume 12, Numéro 2, Pages 3204-3216

Effect Of Extraction Mode On Phenolics Contents And Biological Activities Of Two Species Of Thyme Extracts.

Authors : Nouasri Ahmed . Dahmane Dahmane . Metidji Hafitha . Merah Soumaia . Krimat Soumaya . Toumi Mohamed . Ferhat Mohamed-amine . Kameli Abdel Krim .


Description of the subject: The extraction of bioactive compounds from plants was influenced by several parameters like the mode of extraction and solvents used. Our interest in this report turns up from these parameters. Object: The areal part of Thymus Capitatus and Thymus fontanesii, were subjected to a different mode of extractions, then the phenolics compounds were measured after that the biological activities were evaluated. Methodology: The decoction, infusion, hydro-alcoholic and acidified hydro-alcoholic mode and solvents were used for the extraction. The quantification of phenolics compounds was done by spectro-photometric tests. Antioxidant activities were done by scavenging of DPPH, reducing power test and total antioxidant capacity assay, furthermore, the antimicrobial activities were realized by disc diffusion and agar dilution methods. Results: For both species, total phenolics and flavonoid contents were higher for the hydro-methanolic extracts. Concerning the antioxidant activities, the decoction of T. capitatus was the most active extract in DPPH and reducing power tests, but at the total antioxidant capacity, T. fontanesii acidified hydroalcoholic extract, have given the higher content. In the end, the hydroalcoholic extract of both species was more active than the aqueous extracts. Conclusion: The data from this study support the idea that each solvent and mode of extraction chosen has its characteristic effects on yield of extraction, polyphenol quantities and biological activities. Keywords: T.capitatus, T.fontanesii, mode of extraction, antioxidant antimicrobial activities.


T. capitatus, T. fontanesii ; mode of extraction ; antioxidant antimicrobial activities

Total Phenolic, Flavonoid Contents And In-vitro Anti-inflammation Evaluation Of Ethanol Extracts Of Hibiscus Sabdariffa Calyx, Malus Domestica And Their 1:1 Extracts Blend On Protein Denaturation

Shallangwa Gideon Adamu .  Ekwumemgbo Patricia Adama .  Osu Usman Isa .  Bolarin Olubunmi Olukemi .  Moyosore Abdullahi . 
pages 483-491.

Comparative Study Of The Antioxidant Activity And Phenols And Flavonoids Contents Of The Ethyl Acetate Extracts From Two Saharan Chenopodacea: Haloxylon Scoparium And Traganum Nudatum

Allaoui Messaouda .  Cheriti Abdelkrim .  Chebouat Elyacout .  Dadamoussa Belkhir .  Gherraf Nouredine . 
pages 71-79.

Extraction, Phytochemical Assay And Biological Activities Of Phenolic Compounds From A Medicinal Plant: Eucalyptus Globulus

Makhlouf L. .  Madani K. .  Madouri L. .  Allou S. .  Benaouicha L. .  Chibane M. . 
pages 51-53.