تقدير الفاعلية ضد البكتيريا لبعض المركبات العضوية arabic 23 English 160
Asma O.A. jebril (3-2019)

– Iron oxide nanoparticles (IONPs) can play a significant role in the removal of heavy metal from contaminated solution .Aresnite ,As(III) highly toxic,mobile and predominant species in arsenic contaminated water IONPs have been synthesized, characterized and tested for the removal of As(III) from arsenic contaminated water. In this work , we synthesized IONPs using a chemical method involving dispersion of Fe3+ ions through polymer molecules of poly vinyl alcohol (PVA) in aqueous medium X-ray diffraction (XRD) analysis confirmed the formation of a single phase rhomobohrdral crystal structure, the size of nanoparticles was 50-100 nm. Transmission electron microscopic images corborate the result of IONPs (50-100 nm) . The adsorption of As(III),Hg(II) and Cd(II) On (IONPs) was studied using four parameters contact time, concentration, dose of IONPs and pH Adsorption equilibrium was achieved in 100 min and maximum removal of As(III) was obtained at pH (6-6.5) . The isotherm analysis indicated that the adsorption data better filted to the Langmuir isotherm model. The maximum adsorption capacities were 101.2, 73.10 and 60.05 mg g_1 for As(III), Hg(II) and Cd(II), respectively.
ezuldeen mohammed abraheem aboushalloua(9-2021)

In this study, six residents of Zawia City who had no history record of occupational lead exposure were investigated. One sample of venous blood was collected from each. Sample preparation consisted of a simple dilution (twenty-fold) with 0.15N HNO3. The was centrifuged to separate serum, which was then isolated and analyzed for lead content by Flame Atomic Absorption Spectroscopy (FAAS). The residue of the sample was also analyzed by the same technique for blood level. The blood lead level in the residue was higher than that in serum lead level. Mean lead concentrations were 4.48mg/L in serum and 60.23 mg/L in residual blood respectively. Blood lead level was quietly correlated with serum lead and accounted for 95% of the variability of serum lead concentration. The bivariate regression coefficient of serum lead was 0.221 (p. 0.001). In a multivariate regression model of serum lead levels that include blood and serum lead level remained an independent predictor of lead plasma level (p. 0.007, p
Ragiab Ali Mokhtar Issa(2-2018)