tobacco smoke contains numerous compounds, many ‎of which are oxidants and capable of producing free radical and enhancing ‎the oxidative stress. the aim of this study was to investigate the effect of cigarette smoking on the erythrocyte antioxidative enzyme activities and the plasma ‎concentration of their cofactors. ‎sixty eight healthy men were enrolled, 32 of whom had never smoked and 36 ha...

Generally, more sophisticated techniques such as, flame atomic absorption (AAS), inductively coupled plasma spectrometer (ICP-MS), and UV/Visible Spectrophotometer were used to determine trace iron metals in pickling (acid cleaning), passivating stainless steel solutions. Simple novel spectrophotometric methods are described for simultaneous determination of iron. While these provide excellent ...

Endodontic files come in contact with blood, infected pulp tissue, and irrigating solutions during root canal therapy. Some instruments such as stereomicroscopy and scanning electron microscopy are used to observe corrosion of endodontic files which are complicated and dependent on preparation methods. Having knowledge of the corrosion and ion release of endodontic files can help in drawing fir...

background: nickel is an important constituents widely used in different industrial processes for production of various syn¬thetic materials. for evaluation of workers’ exposure to trace toxic metal of ni (ii), environmental and biological monitor¬ing are essential processes, in which, preparation of samples is one of the most time-consuming and error-prone as¬pects prior to analysis. methods: ...

fifty-four drinking groundwater samples were collected in april 2010 from some districts of the dakahlyia governorate, egypt. the water samples were analyzed by atomic absorption spectrophotometer for iron, manganese, lead, nickel, chromium, zinc, copper, cobalt and cadmium concentrations. all samples but two were found suitable for drinking; from the water sample from aga district showed sligh...

This paper reviews the current research on the speciation and determination of mercury by various analytical instruments such as, atomic absorption spectrometer (AAS), voltammeter, inductively coupled plasma optical emission spectrometer (ICP-OES), ICP-atomic emission spectrometer (AES), ICP-mass spectrometer (MS), atomic fluorescence spectrometer (AFS), spectrophotometer, spectrofluorometer, a...

This research work was carried out to investigate heavy metals in soil samples affected by burnt hospital waste standards analytical procedure. The result reveals the presence of following concentration ranges from chromium (Cr) 0.90 ± 0.12-1.20±0.00 (mg/kg), lead (Pb) 1.10±0.0-2.20±0.11 Silicon (Si) 0.05±0.03-2.20±0.11 Cadmium (Cd) 0.55±0.13-0.55±0.02 silver (Ag) 0.03±0.01-0.05±0.03 Cobalt (Co...