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Effect of colouring green stage zirconia on the adhesion of veneering ceramics with different thermal expansion coefficients

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International Journal of Oral Science 2013年第4期5卷 236-241页

作者： guliz aktas Erdal Sahin Pekka Vallittu Mutlu zcan Lippo Lassila Department of Prosthodontics Faculty of DentistryHacettepe University Department of Biomaterials Science and Turku Clinical Biomaterials Centre University of Turku Dental Materials Unit Center for Dental and Oral MedicineClinic for Fixed and Removable Prosthodontics and Dental Materials ScienceUniversity of Zrich

This study evaluated the adhesion of zirconia core ceramics with their corresponding veneering ceramics, having different thermal expansion coefficients （TECs）, when zirconia ceramics were coloured at green stage. Zirconia blocks （N=240; 6 mm x 7 mm x 7 mm） were manufactured from two materials namely, ICE Zirconia （Group 1） and Prettau Zirconia （Group 2）. In their green stage, they were randomly divided into two groups. Half of the specimens were coloured with colouring liquid （shade A2）, Three different veneering ceramics with different TEC （ICE Ceramic, GC Initial Zr and IPS *** Ceram） were fired on both coloured and non-coloured zirconia cores. Specimens of high noble alloys （Esteticor Plus） veneered with ceramic （VM 13）（n= 16） acted as the control group. Core-veneer interface of the specimens were subjected to shear force in the Universal Testing Machine （0.5 mm-min-1）. Neither the zirconia core material （P=0.318） nor colouring （P=0.188） significantly affected the results （three-way analysis of variance, Tukey＇s test）. But the results were significantly affected by the veneering ceramic （P=0.000）. Control group exhibited significantly higher mean bond strength values （45.7__.8） MPa than all other tested groups （（27.1__.4.1）-（39.7__.4.7） and （27.4__.5.6）-（35.9___4.7） MPa with and without colouring, respectively）（P^0.001）. While in zirconia-veneer test groups, predominantly mixed type of failures were observed with the veneering ceramic covering ~ 1/3 of the substrate surface, in the metal-ceramic group, veneering ceramic was left adhered 1/3 of the metal surface. Colouring zirconia did not impair adhesion of veneering ceramic, but veneering ceramic had a significant influence on the core-veneer adhesion. Metal-ceramic adhesion was more reliable than all zirconia-veneer ceramics tested.

关键词： adhesion bond strength colouring~ thermal expansion coefficient zirconia

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Effects of resveratrol on hydrogen peroxide-induced oxidative stress in embryonic neural stem cells

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Neural Regeneration Research 2013年第6期8卷 485-495页

作者： Sibel Konyalioglu guliz Armagan Ayfer Yalcin Cigdem Atalayin Taner Dagci Department of Biochemistry Faculty of PharmacyEge University Department of Restorative Dentistry and Endodontics Faculty of DentistryEge University Department of Physiology School of MedicineEge University Center for Brain Research Ege University

Resveratrol, a natural phenolic compound, has been shown to prevent cardiovascular diseases and cancer and exhibit neuroprotective effects. In this study, we examined the neuroprotective and antJoxJdant effects of resveratrol against hydrogen peroxide in embryonic neural stem cells. Hydrogen peroxide treatment alone increased catalase and glutathione peroxidase activities but did not change superoxide dismutase levels compared with hydrogen peroxide ＋ resveratrol treatment. Nitric oxide synthase activity and concomitant nitric oxide levels increased in response to hydrogen peroxide treatment. Conversely, resveratrol treatment decreased nitric oxide synthase activity and nitric oxide levels. Resveratrol also attenuated hydrogen peroxide-induced nuclear or mitochondrial DNA damage. We propose that resveratrol may be a promising agent for protecting embryonic neural stem cells because of its potential to decrease oxidative stress by inducing higher activity of antioxidant enzymes, decreasing nitric oxide production and nitric oxide synthase activity, and alleviating both nuclear and mitochondrial DNA damage.

关键词： neural regeneration traditional Chinese medicine stem cells resveratrol embryonic neural stemcells hydrogen peroxide catalase glutathione peroxidase nitric oxide synthase nitric oxide DNAdamage neuroprotection grants-supported paper neuroregeneration

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Consumption and Leisure Patterns of Youth in Turke

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Journalism and Mass Communication 2012年第11期2卷 1073-1083页

作者： guliz Mugan Akinci Okan University Istanbul Turkey

Consumption-oriented daily life resulted in new forms of consumption spaces in many cities. Among these spaces, shopping malls are significant with their improved physical and social environments for consumption and leisure for all the family. One of the important marginalized groups, to whom the mall appeals, are young people. Within this framework, the main purpose of this study is to investigate the consumption and leisure practices and experiences of young people in Turkey from their point of view. Migros, a shopping mall in Ankara, was chosen as the site for this research, where both consumption and leisure practices are overlapping within the same space. The research was carried out through observation and in-depth interviews with 104 teenagers. The results indicated that shopping malls were the main leisure and consumption site for teenagers. Teenagers＇ choice of malls as their favorite leisure and consumption space were found to be the result of some factors such as restrictions which were provoked by their parents, security concerns, location of the mall, and accessibility and limited financial resources. These factors seemed to lead to restrictions in the choice of places to spend their leisure time and limit the use of leisure spaces other than malls. As a consumer group in the mall space, teenagers had some complaints about the prices of facilities which seemed to be influential on their choices of consumption and leisure practices in the mall environment.

关键词： consumption leisure shopping malls Turkish youth social and physical factors in the mall space

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A Revision Model in Writing for Novice Writers with a Focus on Audience and Feedback

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Journal of Contemporary Educational Research 2019年第1期3卷 6-19页

作者： guliz Turgut Dost Department of Foreign Language Education Aydin Adnan Menderes UniversityAydin09100 Turkey

Revision is a complex,yet important phase in writing to improve the quality of a *** revision models are created to explain its components and the ways these components ***,analysis of available models shows that they are proposed mainly for expert writers,who can complete the complex revision process individually,without the need of support or *** of the available revision models also do not include audience as a ***,the purpose of this paper is to introduce an alternative revision model for novice writers at or higher than highschool level with a focus on audience and ***,the definition of revision is made,which is followed by summaries of the importance of audience and feedback in ***,available revision models in literature that serves as the basis of the alternative model are ***,the alternative revision model is introduced with its components and the way these components work is *** revision model presented in this paper will contribute to literature on writing by filling the gap in revision models by proposing a model for novice writers and highlighting the importance of audience and feedback.

关键词： audience feedback novice writer revision revision models writing

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39例肾脏转移性肿瘤的临床病理学研究

39例肾脏转移性肿瘤的临床病理学研究

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第九届全国肿瘤转移学术大会暨2011年黑龙江省医学会肿瘤学年会

作者：贺慧颖 guliz A Bakan Linda Sercia Cristina Magi-Galluzzi 美国克利夫兰医学中心病理系北京大学医学部病理系美国loyola大学医学院

目的:发生在肾脏的肿瘤绝大多数是肾的原发性肿瘤。在生前发现的肾脏转移性肿瘤非常少见,相关文献基本上都是病例报道。但是,转移性肾肿瘤可以在临床上和影像学上相似于原发性肾肿瘤,甚至有时

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