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Articles by Marwan S.M. Al-Nimer
Total Records ( 2 ) for Marwan S.M. Al-Nimer
  Zainab W. Abdul Lateef and Marwan S.M. Al-Nimer
  The objective of this study is to show the effect of free radicals induced by fixed dose rate of X-rays radiation on the chemical constituents of some medicinal plants; barks of Cinnamomum verum (cinnamon), leaves of Salvia officinalis (sage) and Camellia sinensis (green tea). Four extracts (1%) were prepared for each medicinal plant; hydro-distilled, aqueous, ethanol and methanol. Each extract was subjected to X-rays radiation at rate of 1.9 Gy min-1. The UV-Visible spectra, physiochemical properties and biochemical constituents of each non irradiated and irradiated extracts were determined. The results showed that the effect of irradiation on the hydro-distilled and aqueous extract differed from alcohol extract. Favorable effect of irradiation was observed on the green tea extract. Considerable loses of total polyphenols and flavonoids quantities were observed in aqueous extracts. X-rays radiation remarkably induced degradation of allantoin and a slight changes in release nitrogen species. In conclusion X-ray radiation of medicinal plants in solutions produced dual effect in terms of improving and degrading the active ingredients depending on the extracted solution as well as the native constituents of each medicinal plant.
  Marwan S.M. Al-Nimer , Rana Abd-ul-Karim Rasheed and Shama Mohamed Jawad Saadaldin
  Staphylococcus aureus is a pathogen known to cause biomaterial-associated infections of implants and devices. Adherent Staphylococcus aureus are highly resistant to the bactericidal activity of phagocytes and they are also resistant to most antimicrobial agents. This study aimed to evaluate the antibacterial activity and the abhesive property of hydro-distillation of Vitis vinifera seeds extract against Staphylococcus aureus. The Minimum Inhibitory Concentration (MIC) of susceptibility Staphylococcus aureus, isolated from patients, to oxacillin and hydro-distilled grape seed extract were determined by microdilution method using Muller-Hinton broth. Oxacillin or grape seed extract was added either before or after bacterial adhesion in the well of micro-titer plate. Five out of 24 isolates collected from infected burns and 7 out of 8 isolates collected from infected wounds were resistant to oxacillin (MIC≥8 μg mL-1 and the MICs of grape seed extract were ranged from 1.152 to>150 μg mL-1. The growth of Staphylococcus is effectively inhibited by the extract of grape seed when the extract is added either before or after bacterial adhesion (MIC≤150 μg mL-1). It concludes that grape seed extract inhibits the growth of oxacillin-resistant Staphylococcus aureus and it exerts abhesive effect against it.
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