A Case of Frontotemporal Dementia with Amyotrophic Lateral Sclerosis Presenting with Pathological Gambling

Ozel-Kizil ET,Sakarya AL,Arica B,Haran S 대한신경과학회 2013 Journal of Clinical Neurology Vol.9 No.2

Background Pathological gambling (PG), which is characterized by consistent, repetitive gambling and unsuccessful quitting attempts, is classified as an impulse control disorder. PG has also been reported in patients with Parkinson’s disease, frontotemporal dementia, and amyotrophic lateral sclerosis. Case Report A 53-year-old male visited the outpatient clinic due to excessive gambling and personality changes. Based on electrophysiological findings and neuropsychiatric assessment,he was diagnosed as frontotemporal dementia-amyotrophic lateral sclerosis. Conclusions This case report underlines that PG can also be seen in patients with neurological disorders involving the orbitofrontal cortex.

Experimental study on the rheology of anisotropic, flocculated and low volume fraction colloids

Ozel, Burcu Genc,Orum, Aslihan,Yildiz, Mehmet,Menceloglu, Yusuf Z. 한국유변학회 2014 Korea-Australia rheology journal Vol.26 No.1

In this work, we have investigated rheological behavior of colloids with a low particle volume fraction, and anisotropic and flocculated microstructures through measuring their viscosity and electrical resistance under varying shear rates together with utilizing several relevant characterization methods (i.e., Dynamic Light Scattering, Transmission Electron Microscopy, Atomic Force Microscopy, and Capacitance and Electrical resistance measurements). The colloids are formed through the suspension of hydrophilic/phobic fumed silica particle with attractive/repulsive interaction in polyethylene glycol and/or ethylene oxide-propylene oxide copolymer. It is observed that studied suspensions display shear thickening/thinning flow behavior depending on their microstructure (the spatial distribution and arrangements of particles in continuous media) and associated changes in cluster sizes, which are controlled by the break down of densified clusters (due to the shear induced mechanical and hydrodynamical forces) and the interaction forces among particle-particle and particles-polymers (owing to physicochemical effects). The detailed evaluation of the experimental results indicates that the shear thickening phenomena in low volume fraction, anisotropic and flocculated systems can be mainly attributed to the increase in the effective volume fraction of particles due to both hydrodynamic and physicochemical forces.

Magnetic field-dependent low-energy magnon dynamics in α-RuCl3

Ozel, Ilkem Ozge,Belvin, Carina A.,Baldini, Edoardo,Kimchi, Itamar,Do, Seunghwan,Choi, Kwang-Yong,Gedik, Nuh American Physical Society 2019 Physical Review B Vol.100 No.8

Evaluation of C. Albicans and S. Mutans adherence on different provisional crown materials

Ozel, Gulsum Sayin,Guneser, Mehmet Burak,Inan, Ozgur,Eldeniz, Ayce Unverdi The Korean Academy of Prosthodonitics 2017 The Journal of Advanced Prosthodontics Vol.9 No.5

PURPOSE. Bacterial adhesion on provisional crown materials retained for a long time can influence the duration for which permanent prosthetic restorations can be healthily worn in the oral cavity. The aim of this study was to compare seven different commonly used provisional crown materials with regard to Streptococcus mutans and Candida albicans surface adhesion. MATERIALS AND METHODS. For each group, twenty specimens of the provisional fixed prosthodontic materials TemDent ($Sch{\ddot{u}}tz$), Imident (Imicryl), Tab 2000 (Kerr), Structur Premium (Voco), Systemp (Ivoclar Vivadent), Acrytemp (Zhermack), and Takilon-BBF (Takilon) were prepared (diameter, 10.0 mm; height, 2.0 mm). Surface roughness was assessed by atomic force microscopy. Each group was then divided into 2 subgroups (n=10) according to the microbial suspensions used: S. mutans and C. albicans. The specimens were incubated at $37^{\circ}C$ with S. mutans or C. albicans for seven days. Bacterial adherence on surfaces was assessed using the 2,3-bis[2-methyloxy-4-nitro-5-sulfophenyl]-2H-tetrazolium-5-carboxanilide (XTT) assay. RESULTS. S. mutans showed maximum adhesion to Structur, followed by Systemp, Acrytemp, Takilon, Tab 2000, Imident, and TemDent (P<.05). The highest vital C. albicans adhesion was noted on Takilon, followed by Imident and Tab 2000; the lowest adhesion was noted on Systemp (P<.05). CONCLUSION. The materials showed significant differences in the degree of bacterial adhesion. C. albicans showed higher surface adhesion than S. mutans on provisional crown and fixed partial denture denture materials.

Online Image Content Analysis of Political Figures : Facial Expressions of National Assembly Members in South Korea

Bulent Ozel,Chien-leng HSU,Yon Soo Lim,Han Woo PARK 한국콘텐츠학회 2009 ICCC International Digital Design Invitation Exhib Vol.2009 No.12

This research examines the emotional content contained in facial pictures of South Korean politicians. The data were collected from official homepages of 18th National Assembly members in South Korea. We classified the types of facial expressions (smiling, frowning, no expression) using the official photographs on the members' homepages. Our analyses show that a smiling image is the most prevalent facial expression on Web pages of South Korean politicians regardless of distribution of their socio-political-demographic attributes. Furthermore, our analyses suggest that existence and strength of a smiling image has statistically significant positive correlation with politicians' visibility counts. Opposition parties significantly exhibit more prevalent frowning faces and expressionless faces compared to ruling party. Besides, our findings hint that more experienced politicians. contrary to their less experienced colleagues of similar generations, keep smiling.

The production of Ni and co-gahnite pigments using ZnO powder produced from metal slags

Emel Ozel,Nail Gurbuz,Emrah Coskun 한양대학교 세라믹연구소 2010 Journal of Ceramic Processing Research Vol.11 No.2

In this study, Ni and Co-gahnite pigments were produced from Al2O3 powder and ZnO powder obtained from industrial metal slags. Different pigment compositions were prepared by adding metal oxides (NiO or Co3O4) and mineralisers (NaF, CaF2 or Li2CO3). Pigments were calcined in an electric furnace at 1300, 1400 and 1450 oC for 4 h at a heating rate of 2 K·minute−1. The pigment powders obtained were added to a transparent ceramic glaze and to porcelainised tile bodies. The pigment colours were determined using L*a*b* measurements from a spectrometer. On one hand, the results show that Ni-gahnite pigment is not useful for industrial applications because it has poor colour intensities and stabilities. On the other hand, our results also show that Co-gahnite pigments can be produced using ZnO from industrial metal slags, and that they have an intense blue colour.

Shear bond strength of a new self-adhering flowable composite resin for lithium disilicate-reinforced CAD/CAM ceramic material

Sevda Ozel,Taner Yucel,Esra Yildiz,Meltem Mert Eren,Erkan Sancakli,Hande Sar Sancakli,Ugur Erdemir 대한치과보철학회 2014 The Journal of Advanced Prosthodontics Vol.6 No.6

PURPOSE The purpose of this study was to evaluate and compare the effects of different surface pretreatment techniques on the surface roughness and shear bond strength of a new self-adhering flowable composite resin for use with lithium disilicate-reinforced CAD/CAM ceramic material. MATERIALS AND METHODS A total of one hundred thirty lithium disilicate CAD/CAM ceramic plates with dimensions of 6 mm × 4 mm and 3 mm thick were prepared. Specimens were then assigned into five groups (n=26) as follows: untreated control, coating with 30 µm silica oxide particles (Cojet™ Sand), 9.6% hydrofluoric acid etching, Er:YAG laser irradiation, and grinding with a high-speed fine diamond bur. A self-adhering flowable composite resin (Vertise Flow) was applied onto the pre-treated ceramic plates using the Ultradent shear bond Teflon mold system. Surface roughness was measured by atomic force microscopy. Shear bond strength test were performed using a universal testing machine at a crosshead speed of 1 mm/min. Surface roughness data were analyzed by one-way ANOVA and the Tukey HSD tests. Shear bond strength test values were analyzed by Kruskal-Wallis and Mann-Whitney U tests at α=.05. RESULTS Hydrofluoric acid etching and grinding with high-speed fine diamond bur produced significantly higher surface roughness than the other pretreatment groups (P<.05). Hydrofluoric acid etching and silica coating yielded the highest shear bond strength values (P<.001). CONCLUSION Self-adhering flowable composite resin used as repair composite resin exhibited very low bond strength irrespective of the surface pretreatments used.

Effects of Golden Thistle (Scolymus hispanicus L.) on Cytotoxic Activity: Cell Cycle Arrest and Apoptotic Properties on the CaCo-2 Cell Line

Cansu Ozel-Tasci,Sukru Gulec 한국식품영양과학회 2022 Journal of medicinal food Vol.25 No.5

Cancer is a global concern for many individuals with high mortality rates, with colon cancer being the third most common diagnosed cancer worldwide. A phytochemical-rich diet is often recommended in the prevention and during the treatment of cancer cases. Golden thistle (GT) plant (Scolymus hispanicus L.) is a wild edible plant widely consumed in the Mediterranean countries. In this study, we aimed to obtain a hydromethanolic extract from three parts of the GT plant and test its antiproliferative activity in the CaCo-2 human adenocarcinoma cell line. Concentrations of the golden thistle extract (GTE) were used to treat CaCo-2 cells and the most significant reduction was detected with 4 mg/mL GTE after 72 h, with 78.3% decrease in cell viability (P < .05). Additionally, 4 mg/mL GTE caused 7.8-fold higher release of lactate dehydrogenase enzyme, indicating cell death after treatment. Flow cytometric analyses concluded both 3.3-fold higher early and late apoptotic activity of the 4 mg/mL GTE compared with the nontreated control group (P < .05). Last, 4 mg/mL GTE showed 24.1% reduction in the G1 phase and 38.1% increase in the S phase of cell cycle distribution. The alteration of G1 and S phases in the cell cycle led to growth reduction of CaCo-2 cells and caused apoptosis.

Evaluation of C. Albicans and S. Mutans adherence on different provisional crown materials

Gulsum Sayin Ozel,Mehmet Burak Guneser,Ozgur Inan,Ayce Unverdi Eldeniz 대한치과보철학회 2017 The Journal of Advanced Prosthodontics Vol.9 No.5

PURPOSE. Bacterial adhesion on provisional crown materials retained for a long time can influence the duration for which permanent prosthetic restorations can be healthily worn in the oral cavity. The aim of this study was to compare seven different commonly used provisional crown materials with regard to Streptococcus mutans and Candida albicans surface adhesion. MATERIALS AND METHODS. For each group, twenty specimens of the provisional fixed prosthodontic materials TemDent (Schütz), Imıdent (Imıcryl), Tab 2000 (Kerr), Structur Premium (Voco), Systemp (Ivoclar Vivadent), Acrytemp (Zhermack), and Takilon-BBF (Takilon) were prepared (diameter, 10.0 mm; height, 2.0 mm). Surface roughness was assessed by atomic force microscopy. Each group was then divided into 2 subgroups (n=10) according to the microbial suspensions used: S. mutans and C. albicans. The specimens were incubated at 37°C with S. mutans or C. albicans for seven days. Bacterial adherence on surfaces was assessed using the 2,3-bis[2-methyloxy-4-nitro-5-sulfophenyl]-2H-tetrazolium-5-carboxanilide (XTT) assay. RESULTS. S. mutans showed maximum adhesion to Structur, followed by Systemp, Acrytemp, Takilon, Tab 2000, Imident, and TemDent (P<.05). The highest vital C. albicans adhesion was noted on Takilon, followed by Imident and Tab 2000; the lowest adhesion was noted on Systemp (P<.05). CONCLUSION. The materials showed significant differences in the degree of bacterial adhesion. C. albicans showed higher surface adhesion than S. mutans on provisional crown and fixed partial denture denture materials.

Prealbumin and Retinol Binding Proteins Are Not Usable for Nutrition Follow-Up in Pediatric Intensive Care Units

Tekguc, Hakan,ozel, Deniz,Sanaldi, Huriye,Akbas, Halide,Dursun, Oguz The Korean Society of Pediatric Gastroenterology 2018 Pediatric gastroenterology, hepatology & nutrition Vol.21 No.4

Purpose: Feeding children is a problem in pediatric intensive care units (PICU) and it is difficult to know the correct amount. The purpose of this study is to evaluate if prealbumin or retinol binding proteins (RBP) are effective relative to daily enteral nutrition, without being affected by severity of diseases or infections and can be used to follow up nutritional amount. Methods: This is a prospective observational study that includes 81 patients admitted to PICU in Akdeniz University with estimated duration >72 hours, age between 1 month and 8 years. Daily calorie and protein intake were calculated and prealbumin, RBP and C-reactive protein (CRP) levels were measured on the first, third, fifth and seventh mornings. Results: We find moderate correlation between daily calorie intake and prealbumin levels (r=0.432, p<0.001), RBP levels and daily protein intake (r=0.330, p<0.001). When we investigated the relationship between changes of prealbumin, RBP, CRP, calorie and protein intake during intensive care stay, we found that increase of Prealbumin and RBP levels are explained by decrease of CRP levels (r=-0.546 and -0.645, p<0.001) and not with increase of nourishment. Conclusion: Even adjusted for PRISM3, age and CRP, prealbumin and RBP are correlated with last 24 hours' diet. However, it is not convenient to use as a follow up biomarker because increase of their levels is related with decrease of CRP levels.