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Hajer Naceur Ben Marzoug,Jalloul Bouajila,Monia Ennajar,Ahmed Lebrihi,Florence Mathieu,Franc¸ois Couderc,Manef Abderraba,Mehrez Romdhane 한국식품영양과학회 2010 Journal of medicinal food Vol.13 No.4
Essential oils of four different Eucalyptus species (Eucalyptus salubris, Eucalyptus salmonophloia, Eucalyptus oleosa, and Eucalyptus gracilis) grown in southern Tunisia were screened for their antioxidant and antimicrobial properties as well as their chemical compositions. According to gas chromatography-flame ionization detection and gas chromatography-mass spectrometry analysis, chemical compositions of the Eucalyptus species E. salubris (27 compounds; 99.2%), E. salmonophloia (31 compounds; 99.2%), E. oleosa (32 compounds; 97.6%), and E. gracilis (18 compounds; 97.7%) were identified. In the 1,1-diphenyl-2-picrylhydrazyl assay, the antioxidant activity was in the range of 12.0–52.8mg/mL, whereas in the 2,2′-azinobis-3-ethylbenzothiazoline-6-sulfonate assay, E. oleosa (176.5±3.1mg/L) gave the best inhibition result. To evaluate antimicrobial activity, all essential oils were tested against bacteria (two Gram-positive and two Gram-negative), two yeast, and two fungi. Essential oils exhibited an interesting antibacterial activity against all microorganisms tested (activity was better against Gram-positive bacteria) except for Staphylococcus aureus and Escherichia coli. Correlations between chemical composition and biological and antioxidant activities were studied.
Development and Surface State Characterization of a Spacer Waterproof Breathable Fabric
Imene Ghezal,Ali Moussa,Imed Ben Marzoug,Ahmida El-Achari,Christine Campagne,Faouzi Sakli 한국섬유공학회 2020 Fibers and polymers Vol.21 No.4
This research reports the designing and the optimization of a waterproof breathable fabric. A new waterproofbreathable fabric made by coating a double sided spacer knit with a mixture of an acrylic paste and a fluorocarbon resin ispresented. The treated fabric can be used for producing outdoor garments. The surface states of treated samples werecharacterized by using the assessment of the coating add-on (%), water contact angle (o), surface free energy (mN·m-1), androughness (mm). The main coating process parameters were studied by using the Box-Behnken experimental design. It wasproved that the quantity of acrylic paste (g·m-2) and the reticulation time (min) have the most significant effect on the coatingadd-on value (%). The surface free energy (mN·m-1) is affected by the three studied factors. Roughness was also evaluatedbefore and after the coating treatment. However, no significant variation in values was noticed. Optimum responses areobtained with 2.71 % of fluorocarbon resin, 412.00 g·m-2 of acrylic paste, and a reticulation time equal to 13.52 minutes. Optimized values for the coating add-on, SFE, and roughness are equal to 79.716 %, 29.17 mN·m-1, and 0.058 mm,respectively.
Naziha Chabir,Mehrez Romdhane,Alexis Valentin,Be´atrice Moukarzel,Hajer Naceur Ben Marzoug,Nadia Ben Brahim,Mohamed Mars,Jalloul Bouajila 한국식품영양과학회 2011 Journal of medicinal food Vol.14 No.11
This study investigated the chemical composition (by using gas chromatography/flame ionization detection and gas chromatography/mass spectrometry, an antioxidant [1,1-diphenyl-2-picrylhydrazyl] [DPPH] radical–scavenging assay, and a 2,2′-azinobis-3-ethylbenzothiazoline-6-sulfonate [ABTS] radical cation–scavenging assay) and the antimalarial and cytotoxic activities of essential oil extracted from leaves of Melaleuca armillaris. Thirty-two components representing more than 98% of the total composition of the essential oil were identified. The main components were 1,8-cineole (85.8%), camphene (5.05%), and α-pinene (1.95%). The antioxidant activity by ABTS assay showed a mean (±standard deviation) 50% inhibitory concentration (IC50) value of 247.3±3.9 mg/L, and the DPPH assay yielded an IC_50 value of 2183.6±44.3 mg/L. The antimalarial study indicated that the essential oil had mild activity against the chloroquine-resistant Plasmodium falciparum FcB1 strain (IC_50, 27±2 mg/L). The cytotoxic activity of this essential oil was tested against MCF7 human breast cancer cells and was found to be high (IC_50, 12±1 mg/L).
Song, Daesub,Ha, Gunwoo,Serhan, Wissam,Eltahir, Yassir,Yusof, Mohammed,Hashem, Farouq,Elsayed, Elsaeid,Marzoug, Bahaaeldin,Abdelazim, Assem,Al Muhairi, Salama American Society for Microbiology 2015 Journal of clinical microbiology Vol.53 No.4
<P>We present here a rapid immunochromatographic assay for the detection of Middle East respiratory syndrome coronavirus (MERS-CoV) antigen in the nasal swabs of dromedary camels. The assay is based on the detection of MERS-CoV nucleocapsid protein in a short time frame using highly selective monoclonal antibodies at room temperature. The relative sensitivity and specificity of the assay were found to be 93.90% and 100%, respectively, compared to that of the UpE and open reading frame 1A (Orf1A) real-time reverse transcriptase PCR (RT-PCR). The results suggest that the assay developed here is a useful tool for the rapid diagnosis and epidemiological surveillance of MERS-CoV infection in dromedary camels.</P>