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    THE EFFECT OF CRYSTAL STRUCTURE AND METAL ELECTRODES ON GAS DETECTION IN TiO2 NANOTUBES H2 SENSORS
    (International Association for Hydrogen Energy, IAHE, 2022) Tasyurek L.B.; Isik E.; Isik I.; Kilinc N.
    In this study, the effects of various metal electrodes and various crystal structures on hydrogen (H2) gas sensors based on titanium dioxide (TiO2) nanotubes were investigated. For the production of TiO2 nanotubes, anodization method consisting of an electrolyte containing 0.5wt% NH4F in 85% pure glycerol solution was applied. Scanning electron microscope (SEM) images of the obtained TiO2 nanotubes were examined. In order to see the effect of different crystal structures of TiO2, amorphous, anatase and rutile phases were obtained by annealing of samples. Each of the Ti/TiO2 nanotubes/metal (Pd, Pt, Au, and Ag) gas sensors, obtained by coating with palladium (Pd), platinum (Pt), gold (Au) and silver (Ag) electrodes, was tested at room temperature at 1% H2 concentration depending on three different phases. © 2022 Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2. All rights reserved.
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    ST elevation during treadmill exercise test in a young patient with slow coronary flow: A case report and review of literature
    (2006) Celik T.; Iyisoy A.; Kursaklioglu H.; Yuksel C.; Turhan H.; Isik E.
    The coronary slow flow phenomenon is an angiographic curiosity characterized by delayed distal vessel opacification provided that the presence of significant epicardial coronary disease is excluded. Slow flow phenomenon in epicardial coronary arteries is not infrequent finding during routine coronary angiography. However, the clinical features of patients with slow flow phenomenon have not been extensively studied. ST elevation in leads without Q waves during exercise testing has not been previously reported in patients with slow flow phenomenon. In the current case, we report a 29-year-old man with angiographically normal coronary arteries associated with slow coronary flow in the absence of any significant obstructive coronary artery disease and no evidence of epicardial coronary artery spasm in whom ST segment elevation in leads I and aVL was observed at maximal exercise of treadmill test. © 2006 Elsevier Ireland Ltd. All rights reserved.