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Articles by Mehdi Mohammadi
Total Records ( 3 ) for Mehdi Mohammadi
  Raheleh Feil and Mehdi Mohammadi
  This study examines the relationship between affective-social competencies, satisfaction from quality of work and organizational citizenship behavior of Iranian nurses as a structural equation model. The population included all Iranian nurses in the public and private hospitals. By random cluster sampling method 152 nurses were selected. The instruments included affective-social competencies scale, quality of researching life scale and organizational citizenship behavior scale. The results of statistical evaluations in exploration showed that: There was a significant and positive relationship between nurses affective-social competencies and their organizational citizenship behavior. There was a significant and positive relationship between nurses affective-social competencies and their satisfaction from quality of work. Nurses affective-social competencies via their satisfaction from quality of work has a significant and positive relationship with their organizational citizenship behavior.
  Zohreh Habibi , Rasool Eshaghi , Mehdi Mohammadi and Maryam Yousefi
  The chemical composition of the essential oil from Heracleum rechingeri was analysed using GC-MS. Twenty-seven compounds, accounting for 94.62% of the extracted essential oil, were identified. The main oil compounds were octyl acetate (29.49%), elemicine (23.06%), (E)-caryophyllene (9.26%), caryophyllene oxide (6.42%), terpinolene (6.12%) and (Z)-3-octenyl acetate (4.72%). The antimicrobial activity of the essential oil was tested against three different bacteria by disc diffusion method and showed maximum inhibitory activity against Gram-positive bacteria, especially Bacillus subtilis.
  Mehdi Mohammadi , Elham Izadbakhsh and Elham Ehsandoost
  Background: Metal pollution in aquatic environment is a major concern. Biosorption is an innovative tools using living or dead biomasses to eliminate toxic metals from aqueous solutions. Material and Methods: In this study, biosorption of cadmium (II) from aqueous solution by using green algae (Ulva compressa) were investigated. Results: The effect of the most significant process parameters (biosorption contact time, temperature, pH and initial concentration of Cd(II) ions) on the equilibrium isotherm and the adsorption kinetics were studied. The most effective pH was found to be 6. A significant correlation between pH and Cd biosorption was observed. The maximum absorption of Cd with initial concentration were 50, 100 and 150 mg L–1. The high biosorption efficiency was obtained as 52, 83.8 and 94.8% at pH 2.5, 6 and 9. Pseudo-order equation described the kinetic of Cd(II) biosorption. The equilibrium adsorption data are fitted to Langmuir isotherm model. Conclusion: It was observed that Ulva compressa (Linnaeus) can be a valuable material for removal of Cd from aqueous solutions.
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