Altin S.,Fen Edebiyat Fakultesi |
Aksan M.A.,Fen Edebiyat Fakultesi |
Altin E.,Fen Edebiyat Fakultesi |
Balci Y.,Fen Edebiyat Fakultesi |
Yakinci M.E.,Fen Edebiyat Fakultesi
Journal of Superconductivity and Novel Magnetism | Year: 2011
Bi-2212 superconducting whiskers have been fabricated by annealing a melt-quenched precursor using suitable heat-treatment cycles for Bi 3+xSr 2Ca 2Cu 3O 8+δ where x = 1 and 2. Approximately 1-3 mm long whiskers were fabricated for x = 1 and x = 2 and their physical, electrical and magnetic properties were investigated. Crystallization activation energies of the materials were calculated according to Kissinger and Augis-Bennet method using the DTA data. Microstructural changes from glass to heat-treated glass-ceramic materials at different temperatures were investigated with SEM, EDX and XRD analyses. It was observed that the structure of the whiskers has high c-axis oriented single-crystalline Bi-2212 phase. The whiskers fabricated for x = 1 and 2 showed very smooth surface without cracks and dislocations. T c of the whiskers for x = 1 and 2 were obtained to be 83.2 K and 79.8 K respectively. The change of magnetization with applied magnetic fields (M-H) was investigated at three different temperatures, 10, 20 and 40 K, and J cmag was determined using the Bean model. © Springer Science+Business Media, LLC 2010.
Ayanolu B.T.,Aksaray Devlet Hastanesi |
Gurler A.,Ufuk University |
Erdoan F.G.,Ufuk University |
Gunduz O.,Ufuk University |
Alhan A.,Fen Edebiyat Fakultesi
Turkderm Deri Hastaliklari ve Frengi Arsivi | Year: 2015
Background and Design: Behçet's disease (BD) is an important cause of morbidity and mortality. Recurrent aphthous stomatitis (RAS) is a condition affecting oral health-related quality of life (QoL). In this study, we aimed to evaluate QoL of BD patients by using the Behçet's disease quality of life instrument (BDQLI) and to compare the QoL of patients with BD with that of patients with RAS and healthy controls. Materials and Methods: Forty patients with BD and 40 patients with RAS and 40 healthy subjects with similar sociodemographic characteristics were included in the study. We used the BDQLI to evaluate QoL of patients with BD and the Dermatology-specific quality of life instrument for comparison of QqL between patients with BD and RAS. 36-Item Short Form Health Survey and clinical data form were applied in all participants. The results were analyzed statistically. The power of the study was 99%. Results: QoL of patients with BD were lower than that of healthy controls. It was observed that patients with BD had decreased physical functions, impaired perception of pain and poor general health (p<0.001, p=0.001, p=0.016, <0.001). Physical functions were decreased and perception of general heath was worse in patients with RAS compared to healthy controls (p=0.018, p=0.021). There was no difference in QoL between patients with BD and RAS (p>0.05). Female gender, relapse periods and mucocutaneous symptoms negatively affected QoL of patients with BD. Female gender and duration of the disease were found to be the main factors affecting QoL of patients with RAS. Conclusion: Unlike the results obtained with other instruments, with BDQLI, QoL, particularly in patients with active period and female gender was found to be decreased. In this study, there was a dominance of active mucocutaneous symptoms. This may explain the effect of mucocutaneous symptoms on QoL and the fact that there was no difference in QoL between BD and RAS patients. Further studies comparing QoL of patients with BD in whom visceral involvement is also observed with those with other diseases. QoL of BD patients may be improved by paying attention on symptoms that patients have trouble and by evaluating QoL with multidisciplinary approach during routine follow up.