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Articles by S. Maleki
Total Records ( 5 ) for S. Maleki
  S.M. Seyyednejad , S. Maleki , N. Mirzaei Damab and H. Motamedi
  The antibacterial activity of parsley (Petroselinum crispum) and Prunus mahaleb seed ethanolic extracts were examined using agar disc diffusion method against eleven bacteria (Bacillus anthracis, Bacillus subtilis, Bacillus pumilus, Staphylococcus aureus, Bacillus licheniformis, Brucella melitensis, Escherichia coli,Salmonella typhi, Proteus mirabilis, Bordetella bronshiseptica, Pseudomonas aeruginosa). These extracts had inhibitory effect at various concentrations (0.1, 0.2, 0.3 and 0.4 g mL-1) against Gram-positive and Gram-negative bacteria. Prunus mahaleb ethanolic extract had antibacterial activity against P. mirabilis, B. anthracis and S. aureus. B. licheniformis was the most sensitive organism to the parsley ethanolic extract. Both of the extracts had inhibitory effect against Br. melitensis, E. coli and B. licheniformis in low concentrations (0.1 and 0.2 g mL-1). Based on the results of this study, both plants could be considered as disinfectants or antiseptics, thus confirming their use in folk medicine.
  H. Motamedi , A. Safary , S. Maleki and S.M. Seyyednejad
  The antibacterial activity of Ziziphus spina-christi leaves ethanolic and methanolic extracts were examined using agar disc diffusion method against eight bacteria (Salmonella typhi, Proteus mirabilis, Shigella dysenteriae, Escherichia coli, Klebsiella pneumoniae, Brucella melitensis, Bordetella bronshiseptica and Pseudomonas aeruginosa). These extracts had inhibitory effect at various concentrations (0.05, 0.1, 0.2, 0.3 and 0.4 g mL-1) against tested bacteria. The ethanolic extract had the highest activity (20 mm) against B. bronchiseptica while the lowest activity (7 mm) was demonstrated by the methanolic extract on K. pneumoniae. Studies on the Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) of the methanolic extract on two selected bacteria showed that the S. dysenteriae had the highest MIC (18 mg mL-1) and MBC (64 mg mL-1) values.
  A. Safary , H. Motamedi , S. Maleki and S.M. Seyyednejad
  The antibacterial activity of Q. brantii fruits ethanolic and methanolic extracts were examined using agar disc diffusion method against eight bacteria (Salmonella typhi, Proteus mirabilis, Shigella dysenteriae, Escherichia coli, Klebsiella pneumoniae, Brucella melitensis, Bordetella bronchiseptica, Pseudomonas aeruginosa). These extracts had inhibitory effect at various concentrations (0.5, 0.1, 0.2, 0.3 and 0.4 g mL-1) against tested bacteria. The ethanolic extract had the highest activity (30 mm) against Br. melitensis and B. bronchiseptica while the lowest activity (7 mm) was demonstrated by the methanolic extract on E. coli. Studies on the Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) of the methanolic extract on tested microorganisms showed that the highest MIC (20 mg mL-1) and MBC (32 mg mL-1) were demonstrated against Sh. dysenteriae, B. bronchiseptica and P. mirabilis had the highest MIC and MBC values (32 mg mL-1) for the ethanolic extract.
  O. Saeidi , A. Elyasi , S. Maleki and A. Fegh
  This study presents a closed form solution around underground openings based on the four rock failure criteria. The results of the closed form solution are compared to the numerical method to establish the solution. The Tresca, Mohr-Coulomb, Mogi-Coulomb and generalized Hoek-Brown failure criteria are used to determine stress distribution and plastic zone around the circular space. The solutions are implemented in three dimensional distinct element code (3DEC) and assessed numerically. Also, the parametric study using these criteria is presented. Results show that the Tresca failure criterion does not fit in rock mass problems. Because of the employing axial stress, the Mogi-Coulomb failure criterion fitted the numerical results, appropriately. It was observed that increasing the axial stress using Mogi-Coulomb failure criterion decreases the stress distribution and the plastic zone, significantly.
  S. Maleki , S.M. Seyyednejad , N. Mirzaie Damabi and H. Motamedi
  The aim of this study was to examine the antimicrobial activity of the methanolic extract of Torilis leptophylla was tested on eleven bacteria (Bacillus anthracis, Bacillus subtilis, Bacillus pumilus, Staphylococcus aureus, Bacillus licheniformis, Brucella melitensis, Escherichia coli, Salmonella typhi, Proteus mirabilis, Bordetella bronshiseptica and Pseudomonas aeruginosa). Tested extract was effective against all bacteria but not B. subtilis. Consequently, the ethanolic extract had antibacterial activity on some pathogens thus confirming their use in folk medicine.
 
 
 
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