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Articles by M.M. Soliman
Total Records ( 2 ) for M.M. Soliman
  M.M. Soliman , Y.A. El-Fattah El-Senosi , O.M.A. El-Hamid , A.El-Desouki Abd El-Mageed , R.S. Ismaeil and H.A. El-Maqsoud Ali
  In this study, we examined the effect of either lipopolysaccharide (LPS, 1 μg mL–1), Nigella.sativa extract (NS, 5 μg mL–1), or co-treatment of both for 24 h on cytokines expression in mature bovine adipocytes using RT-PCR analysis. The results showed that separate treatment by LPS and NS stimulated the expression of interleukin-1 (IL-1β), IL-6, IL-8 and IL-10. Co-treatment of cells by N. sativa with LPS inhibited LPS induced IL-6 and TNF-α expression and induced additive stimulatory effect on LPS induced IL-8 and IL-10 expression. The results indicate that N. sativa extract has immuno-modulatory effect on bovine adipocytes by stimulating different cytokines expression that potentiate different inflammatory and anti-inflammatory functions in bovine adipocytes.
  Sh. M. Ebrahim , M.M. Abd-El Latif , A.M. Gad and M.M. Soliman
  Electrochemical synthesis of polypyrrole (PPY), doped with 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt (AMPSNa), was carried out using chronoamperometric technique. Cyclic voltammetry measurements showed that the electroactivity of PPY films, doped with AMPSNa, increases with the film thickness. Scanning electron microscopy photographs revealed that the PPY particles are in the nano-scale range and that their size depends on the potential at which the PPY has formed. Electrochemical impedance spectroscopy (EIS), in the potential range of + 1.0 and - 1.0 V, revealed in the PPY film charge transfer domination with a semicircle at high frequencies, and anion diffusion dominance at low frequencies. EIS also showed that the charge transfer resistance of PPY film at - 1.0 V is lower than what is expected and that on increasing the thickness of the PPY films, the overall impedance decreases. The proposed equivalent circuit model, based on the double layer capacity and the Warburg impedance, was replaced by two constant-phase elements to fit the experimental work of this study. The values of the fractional exponent of the first constant phase element at approximately 0.5 indicate that the processes have a diffusion-limited nature.
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