purpose: to describe a patient with eyelid sarcoidosis. case report: a 54 year-old patient was referred for an eyelid mass from 6 months ago.excisional biopsy showed inflammatory granuloma with tuton gaint cells. chest radiograph demonstrated bilateral hilar adenopathy, increased absorption on gallium scan was noted and bronchoalveolar lavage confirmed a diagnosis of sarcoidosis. treatment with...

purpose: to present 2 cases of acanthamoeba keratitis diagnosed by confocal scanning before positive results of smear and culture, and their successful treatment with combined medical therapy and corneal epithelial debridment. patients and findings: confocal scan was carried out in 2 contact lens wearers with a clinical diagnosis of acanthamoeba keratitis followed by corneal epithelial debridme...

bone scanning using the 99mtc-phosphate analogs is an established diagnostic modality and a commonly requested radioisotope examination for a variety of pathologies involving the skeleton, such as osteomyelitis, bony metastases, and occult fractures. the bone scan is one of the most commonly requested procedure in most nuclear medicine department. the images show areas of increased and decrease...

Nitrogen doped tetrahedral amorphous carbon (ta-C:N) thin films were grown on p-Si(1 1 1) substrates using filtered cathodic vacuum arc (FCVA) deposition by varying nitrogen flow rate. The effect of nitrogen flow rate on the corrosion performance of the films was investigated through potentiodynamic polarization and immersion tests in 0.6 M NaCl solutions. The polarization results showed that t...

Cyclic voltammetry and potentiodynamic polarization analyses were utilized to investigate the mechanism kinetics of glycine leaching reactions for chalcopyrite. The effects pH (9–12), temperature (30–90 °C) concentration (0–2 mol/L) on corrosion current density, potential cyclic voltammograms investigated using chalcopyrite concentrate–carbon paste electrodes. Results showed that an increase in...

Corrosion inhibitory effects of new synthesized compound namely 5,5'- ((1Z,1'Z)-(1,4-phenylenebis(methanylylidene))bis(azanylylidene))bis(1,3,4-thiadiazole-2-thiol) (PBB) on mild steel in 1.0 M HCl was investigated at different temperatures using open circuit potential (OCP), potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). Results showed that PBB inhibited m...

The effect of Sn concentration on the corrosion resistance of Pb-Sn alloy in H2S04 electrolyte was investigated by potentiodynamic polarization. A new approach to calculate the exchange current density, icol'n was proposed and proved to be in accordance with the experimental results. This study shows that with the increase of alloying Sn, the corrosion rate of the alloy increased and then decre...