RésuméLe rendement, la composition chimique et les propriétés antibactérienne et antifongique de l'huile essentielle extraite de la biomasse foliaire de Tetraclinis articulata (Vahl) du Khémisset (Maroc) ont été étudiés. La teneur moyenne en huile essentielle des feuilles de cette espèce est 0,22 % par rapport à la matière sèche. Trente quatre composés ont été identifiés par GC et GC/MS ; l'acétate de bornyle (30,74 %), l'α-pinène (23,54 %), le camphre (17,27 %) et le limonène (23,31 %) constituent les principaux composés de cette huile. Une forte activité inhibitrice vis-à-vis de six microorganismes utilisés a été enregistrée.Mots-clés. Tetraclinis articulata (vahl), feuilles, huiles essentielles, composition chimique, propriétés antimicrobiennes, Maroc. identified by GC and GC/MS ; bornyl acetate (30,74 %), α-pinene (23,54 %), camphor (17,27 %) and limonene (23,31 %) are the principal components of this oil. A strong inhibited activity against six microorganisms is obtained.
Ground and excited state self associations are observed in
solution at room temperature in the case of the
9-oxa-2,3,4‘-methoxybenzobicyclo[4.3.0]non-1(6)-ene-7,8-dione
molecule. Depending on the solute concentration, the ground state associated forms are attributed to a dimer
involving interaction between only two solute
molecules, or to an aggregate of higher order. The theoretical
simulation, using the analytical atom−atom
pair potential described below, predicts several energy minima of the
dimer. The two most stable dimer's
structures are those involving a face-to-face slipped structure with
head-to-tail orientation. An excimer emission
is also observed subsequently to the excitation by either the
absorption monomer bands or by the absorption
band of the van der Waals dimer. The two adjacent molecules
forming the excimer species are readily in
approximately parallel planes.
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