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The usage of magnesite production wastes in ceramic tile bodies
Gülfem Binal,Nuran Ay 한양대학교 세라믹연구소 2014 Journal of Ceramic Processing Research Vol.15 No.2
In this study the possibilty of using magnesite wastes, which were consist of during the production of magnesite from Tutluca village (southwest of Eskisehir/Turkey) ore bed to make ceramic tile bodies were explored. The magnesite deposits of Tutluca village lie in serpentinized harzburgites and dunites of Alpine type ultramafic rocks. The features of magnesite production wastes were investigated by applying thermal analysis, X-ray diffraction and X-ray fluorescence spectroscopy. Examined magnesite wastes were added to ceramic tile body compositions in different amounts (20-80 wt.%). Prepared ceramic tile samples were sintered in a laboratory type fast firing kiln at firing temperature and cycle of 1165℃ for 37 minute. Linear firing shrinkage, water absorption, firing strength and porosity values of the resultant products were measured as a function of increasing magnesite waste content. XRD and SEM analysis of resultant products were also investigated. As a result of this study, it has been seen that magnesite production wastes can be utilized as an alternative raw materials for production of ceramic tile with the properties in accordance with wall tiles.
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Alexithymia and Acne Vulgaris: A Case Control Study
Didem Sunay,Murat Baykir,Gülfem Ateş,Meral Ekşioğlu 대한신경정신의학회 2011 PSYCHIATRY INVESTIGATION Vol.8 No.4
Objective To assess relationship between alexithymia and acne vulgaris in young people. Methods A hundred and eleven subjects between 15 and 25 years of age referred to out-patient clinic of dermatology with acne and 78 subjects applied to family physician for complaints other than acne were included in patient and control groups of the study, respectively. A questionnaire to determine demographic characteristics, an acne classification to determine severity of acne and Toronto Alexithymic Scale (TAS) to assess alexithymia were used. Results The mean scores of TAS were 52.7±10.8 and 51.7±10.7 in patient and control groups, respectively. Alexitymia was determined in 23.4% of the subjects in acne group and in 24.4% of control group. No significant differences were found between groups in terms of alexithymia, intermediate alexitymia and three-factors of TAS. Conclusion Alexithymia does not appear to be related to acne vulgaris.
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