Başkent Üniversitesi Kurumsal Akademik Arşivi
Başkent Üniversitesi DSpace, üniversitemiz tarafından doğrudan veya dolaylı olarak yayınlanan kitap, makale, tez, bildiri, rapor ve araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar. Bu sistem, üniversitemizin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve yayınların etkisini artırmak amacıyla telif haklarına uygun olarak Açık Erişim imkanı sağlar.
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Recent Submissions
The Evaluation of Enamel Matrix Derivative on the Bone Regenerative Potential of the Dental Implant with the Transcrestal Sinus Floor Elevation Approach: A Randomized, Parallel CBCT Study
(Başkent Üniversitesi Diş Hekimliği Fakültesi, 2024-09-23) Ozbay, Deniz; Tunc, Samet; Corekci, Ahu Uraz; Ayyildiz, Berceste Guler; Cula, Serpil
Purpose: To evaluate the clinical and radiographic results of simultaneous implant placement using transcrestal sinus floor elevation (TSFE) with and without enamel matrix derivative (EMD) application. Materials and Methods: Twenty-four patients were randomly assigned into two groups: The EMD+TSFE group (n = 13 patients, 20 implants) received TSFE with EMD application, and the TSFE group (n = 11 patients, 20 implants) received TSFE without EMD application. The patients were recalled at 3 (T3) and 12 (T12) months postsurgery. The residual bone height (RBH), implant protrusion length (IPL), peri-implant sinus bone level (SBL), endo-sinus bone gain (ESBG), and implant stability (ISQ) were measured. Multivariate regressions were performed for the groups. Results: At T3, the ESBG was 3.72 +/- 0.85 mm in the EMD+TSFE group and 3.10 +/- 0.05 mm in the TSFE group, and there were statistically significant differences (P P < .05). However, there were no statistically significant differences in ESBG at T12 between the groups (P P > .05). ISQ values did not show a statistical difference between the groups at T1 and T3, but at T3 in the TSFE+EMD group, there was a statistical increase in the intragroup evaluation compared to the TSFE group. Conclusions: The use of EMD in TSFE procedures is effective in new bone formation at the apical part of the implant during the early healing period, but in the long term, no significant difference was shown between cases in which EMD was or was not used in terms of new bone formation and primary and secondary stabilization. Int J Oral Maxillofac Implants 2024;39:615-624. doi: 10.11607/jomi.10506
Developing Countries' Deadlock: What Does the Thirlwall's Law Offer Us?
(Başkent Üniversitesi İktisadi İdari Bilimler Fakültesi, 2024-10-17) Can, Ziya
This study aims to discuss potential alternatives for economic development in developing countries, with contributions from the theoretical background of Thirlwall's law. Developing countries' foreign trade constraints will be highlighted, followed by a comparison of T & uuml;rkiye 's past growth performance with results obtained from Thirlwall's Law equations using balance of payments data. T & uuml;rkiye 's actual growth rates closely resemble the growth forecast of Thirlwall's model, which indicates that post-Keynesian approaches are worth considering to alter the current situation. While providing a perfect solution that could reverse everything for developing countries may be a distant goal, this study aspires to foster a mindset capable of changing the course of events.
Evaluation Of The Efficacy Of Adjuvant Radiotherapy Versus Chemoradiotherapy In Patients With Salivary Gland Tumors
(Başkent Üniversitesi Diş Hekimliği Fakültesi, 2024-12-25) Topkan, Erkan; Somay, Efsun
Fluorimetric Methods For Determination Of Aluminum In Water Resources Utilizing Newly Synthesized N,N'-bis (2,5-dihydroxybenzylidene)-4,4′-Diamino Diphenyl Ether
(Başkent Üniversitesi Eczacılık Fakültesi, 2024-07-16) Tatli, Havva Nur; Gunduz, S. Beniz; Sahin, Mustafa; Altuner, Elif Esra; Dar, Umar Ali
Industrial waste contaimnation of water sources is a serious environmental problem. As a result, it's critical to identify metallic contamination in water with precision, sensitivity, and accuracy. In acetonitrile, the fluorimetric parameters of N,N-'bis(2,5-dihydroxybenzylidene)-4,4 '-diamino diphenyl ether (DHDPE) and aluminum complex were determined. In the acetonitrile medium, the best fluorescence intensity of the DHDPE-Al complex was observed at lambda ex = 280 nm, lambda em = 391 nm (excitation and emission wavelengths). For optimum complex formation, the ideal pH, duration, and temperature were 4.5, 20 min, and 25 degrees C, respectively. Within the ranges of 0.027-0.27 and 0.27-2.70 ppm aluminum concentrations, [Al3+]-F.I. Calibration graphs were linear. The fluorimetric aluminum measurement method was applied to diverse water sources using the newly synthesized macro molecular Schiff base DHDPE as the ligand. The aluminum concentration in water inflow to KOSKI (Konya Water and Sewerage Administration) was doubled as a result of the examination when compared to other samples of water.
A Game-Changing Equation During The Etching Of Tuning Forks And Its Verification Through Experiments
(Başkent Üniversitesi Mühendislik Fakültesi, 2024-08-05) Erbas, Kadir Can; Erdogan, Mebrure; Serdaroglu, Dilek cokeliler; Kocum, Ismail Cengiz
Quartz tuning fork (QTF) sensors, characterized by simplicity, low cost, and high-quality factor, represent a significant subset. This study delves into the etching dynamics of QTF systems, crucial for sensor applications like quartz crystal microbalance (QCM). Both theoretical and experimental investigations into QTF etching, via methods like electro-etching for large-scale tuning forks (TF) and low-pressure radio frequency (RF) plasma treatment for QTFs, have been conducted. Surprisingly, post-etching measurements reveal a lower vibrational frequency for both large-scale TFs and QTFs compared to their bare counterparts, unlike QCM sensors. A novel formula correlating this frequency reduction to mass loss has been proposed and validated through lots of experiments. Notably, longitudinal homogeneity emerges as a pivotal factor influencing the accuracy of the proposed formula. In summary, the novel mathematical framework presented herein is poised to catalyze the widespread adoption of low-cost QTFs as mass-sensitive biosensors, marking a significant advancement in the field.