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Articles by Soumya El Abed
Total Records ( 4 ) for Soumya El Abed
  Fadoua Bennouna , Saad Ibnsouda Koraichi , Hassan Barkai , Yassir Lekbach , Soumya El Abed and Mohammed Lachkar
  Background and Objective: The hydrophobicity and electron donor-electron acceptor properties of wood are considered an important parameters for microbial adhesion and wood degradation. Thus, the physicochemical properties of various wood species before and after treatment with Mentha pulegium, Rosmarinus officinalis and Cananga odorata essential oils were assessed. Materials and Methods: The hydrophobicity, electron acceptor (γ+) and electron donor (γ‾) properties of untreated and treated wood were determined using contact angle measurement. Results: All wood species tested have an electron donor character γ‾ higher than electron acceptor character γ+ and were characterized as having hydrophobic character except dibetou and beech woods which exhibit a hydrophilic character. The degree of hydrophobicity has decreased considerably using Mentha pulegium essential oil with values of water contact angles varying between 14.80±0.06 and 34.20±0.45°C followed by Cananga odorata and Rosmarinus officinalis essential oils with values of water contact angles ranged from 27.70±1.54° to 49.80±0.45° and from 37.00±0.35° to 58.90±0.45°, respectively. Conclusion: In this study, the hydrophobicity and the electron donor-electron acceptor properties have changed after treatment of wood species surfaces with the three essential oils.
  Soumya El abed , Abdellah Houari , Hassan Latrache , Adnane Remmal and Saad Ibnsouda Koraichi
  Biofilm control has become an area of intense study. The effect of four Essential Oil Components (EOC’s) on adherence and biofilms on two pathogenic Pseudomonas aeruginosa isolates were investigated in this study. The inhibitory activity was tested on polystyrene flat-bottomed microtitre plates using the Crystal Violet (CV) staining assay. The results showed that this activity was dependent on the terpenes concentration used to treat the adherence and biofilm. Treatment of Pseudomonas aeruginosa adherence with eugenol, carveol and carvone (0.5 Minimum Inhibitory Concentration), resulted 60, 45 and 54% inhibition for P. aeruginosa (CIP A22) and 69, 65 and 42% for P. aeruginosa (ATCC 27853), respectively. β-ionone shows a slight inhibitory effect for the two strains studied. The results also showed that eugenol (0.5 Minimum Inhibitory Concentration) was able to induce an inhibition≥90% of P. aeruginosa biofilm (strain ATCC 27853) and a concentration of carvone and carveol of at least 0.5 Minimum Inhibitory Concentration (MIC) was required to obtain approximately 50% of biofilm inhibition. β-ionone (0.5 MIC) appeared as the least efficient against P. aeruginosa biofilm resulted only 43% reduction of the biofilm. This study demonstrated the anti-adherence and antibiofilm activity of terpenes and points out the exceptional efficiency of eugenol, carvone and carveol, which could represent candidates in the treatment of Pseudomonas aeruginosa biofilm.
  Mounyr Balouiri , Samira Bouhdid , El Houssaine Harki , Moulay Sadiki , Wessal Ouedrhiri , Soumya El Abed and Saad Koraichi Ibnsouda
  Candida albicans is the most common fungal pathogen of humans; this infectious agent can adhere and colonize several surfaces to establish many dangerous infections. The effect of methanol extract from Bacillus sp. isolated from Calotropis procera Ait. rhizosphere on the physicochemical characteristics of Candida albicans cell surface was investigated. The Lifshitz-van der Waals (γLW), acid-base (surface tension components ΔGiwi, electron donor (γ) and electron acceptor (γ+) parameters of the yeast cell surface were assessed using contact angle measurement. Results showed higher antifungal activity of methanol extract against tested yeast. Regarding contact angle measurements, cell surface of control or untreated C. albicans showed a hydrophilic character (ΔGiwi = 19.96 mJ m–2), a strong electron donor character (γ = 48.4 mJ m–2) and a weak electron acceptor character (γ+ = 5.8 mJ m–2). After limited exposure to the antifungal extract, the treated cell surface has become more hydrophilic quantitatively. Moreover, the results showed an increase of the electron donor character and a decrease of the electron acceptor character. However, non-significant modifications on the physicochemical characteristics of cell surface between exposures for 1 and 2 h to the extract were found. The present investigation may provide information that could be used to alter or modify the adherence of C. albicans to biotic and abiotic surfaces.
  Fadoua Bennouna , Yassir Lekbach , Moulay Sadiki , Soumya El Abed , Saad Ibnsouda Koraichi and Mohammed Lachkar
  Background and Objective: The use of traditional methods as synthetic chemical products to protect cedar wood raises concerns because of the potential negative impact of these products on the public health and environment. The aim of this study was to investigate the chemical composition of three essential oils: Mentha pulegium, Rosmarinus officinalis and Cananga odorata and their antimicrobial effect against six fungi and two bacteria causing degradation of cedar wood. Materials and Methods: Determination of the chemical composition of essential oils was conducted using gas chromatography-mass spectrometry (GC-MS) (Trace GC Ultra). The minimal inhibitory concentrations and minimal bactericidal/fungicidal concentrations were also determined using the broth microdilution assays. Results: The GC/MS analysis of oils studied showed that menthone and pulegone were the major components of Mentha pulegium essential oil, camphene and α-humulene were the major ones in Rosmarinus officinalis, whereas linalool and geranyl acetate were the major components for Cananga odorata. Results also showed potent antifungal activity against all fungi tested, with MICs ranging from 0.0625-0.25% for Mentha pulegium, 0.25-1% for Rosmarinus officinalis and from 0.5-1% for Cananga odorata. An important antibacterial activity was shown against the two bacteria tested with MICs ranging from 0.125-2%. Conclusion: This study suggested that these essential oils may be used as an alternative of traditional methods used for wood protection.
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