Browsing by Author "Kilic, Sinan"

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An Archaeometric Study of Provenance and Firing Technology of Halaf Pottery From Tilkitepe (Eastern Turkey)
(Univ Agean, dept Mediterranean Stud, 2017) Kilic, Necla Caliskan; Kilic, Sinan; Akgul, Hulya Caliskan
The approximation of the raw material source as well as the minimum and maximum firing temperatures in the pottery production technology can be determined depending on the mineralogical and chemical changes in the ceramic components. For the determination various analytical techniques are used such as Xray diffraction (XRD), thermal analysis (TGA-DT), Scanning electron microscope (SEM), X-ray fluorescence spectrometry (XRF) and inductively coupled plasma (ICP). In this paper the possible clay resources of Halaf pottery from Tilkitepe is required to determine. The analyzed pottery fragment and the clay samples were collected around the mound. Experimental studies were carried out at temperatures of 600 degrees C, 700 degrees C, 800 degrees C and 900 degrees C. The results show that the Halaf type ceramic piece from the mound is most probably made using local clay sources in the region and fired at temperatures below 800 degrees C under oxidation conditions.
Comparative Study in Distal Hypospadias Repair: a Meatal-Based Flaps Technic Vs. Tubularized Incised Plate Urethroplasty
(Bmc, 2024) Kilic, Sinan; Kaba, Mehmet; Gecit, Ilhan
ObjectivesHypospadias is the most common anomaly of the male genital system after undescended testis. More than 200 surgical repair techniques have been described for the treatment of hypospadias due to many different meatus localisations and other accompanying anomalies. Kutlay defined a new technique in 2010 with 10 patients with distal hypospadias patients. We compared this new technique with tubularized incised plate urethroplasty (TIP) which is one of the most frequently performed methods. Methods148 patients with hypospadias who underwent surgery at the Urology and Pediatric Surgery Clinic during the period of January 2010 to December 2022 in the first and 2nd clinic, were retrospectively analyzed. The study focused on the remaining 83 patients with distal hypospadias for the purpose of comparison. ResultsThe mean age of group one was 10.0 (+/- 6.9, range 2-27), while for group two it was 10.8 (+/- 5.9, range 3-23). There was no statistically significant difference between the two groups in terms of anatomical position of the meatus, stricture and fistula complications (p > 0.5). ConclusionThe Kutlay technique has been described as an easy-to-learn and feasible method with reliable results. No significant difference in complications was observed in this study compared with TIP, which is known as the standard technique worldwide. We would like to suggest that the method be considered for further evaluation with larger patient groups and different techniques.
Evaluation of Antioxidant Enzyme Levels, Oxidative Stress Markers and Serum Prolidase Activity in Testicular Cancer
(Sage Publications Ltd, 2024) Kaba, Mehmet; Kilic, Sinan; Demir, Halit
Introduction: Testicular cancer is a significant malignancy affecting males, and understanding the underlying biochemical changes associated with the disease is essential for improved management and treatment strategies. Prolidase enzyme, has been implicated in various disease processes. The assessment of serum prolidase activity and its relationship with testicular cancer can provide valuable insights into the pathophysiology of the disease. The objective of this study was to investigate serum prolidase activity, oxidative stress markers, and antioxidant enzyme levels in patients with testicular cancer and evaluate their potential associations, aiming to enhance our understanding of the biochemical alterations and potential implications for testicular cancer management. Methods: A total of 33 male patients diagnosed with testicular cancer were included, along with 35 age-matched male volunteers as the control group. Serum samples were collected and stored at -20 degrees C until analysis. The measurement of superoxide dismutase (SOD), glutathione peroxidase (GSHPx), glutathione-S-transferase (GST), malondialdehyde (MDA), glutathione (GSH), and prolidase levels was performed. Results: The findings demonstrated significantly elevated serum prolidase activity and malondialdehyde (MDA) levels in testicular cancer patients compared to the control group (all, p < 0.05). Conversely, superoxide dismutase (SOD), glutathione peroxidase (GSHPx), and glutathione-S-transferase (GST) levels were significantly lower in testicular cancer patients (p < 0.05). Conclusion: In this study, serum prolidase activity and biochemical markers associated with oxidative stress were investigated in testicular cancer patients. Oxidative stress markers and serum prolidase activity were found to be elevated in testicular cancer. Long-term prospective studies are needed to determine the effectiveness of antioxidant use in cancer treatment.
Factors Affecting Thyroid Volume and the Incidence of Nodules With Goiter School-Aged Children
(Istanbul Univ, 2024) Kaba, Sultan; Dogan, Murat; Yavuz, Alpaslan; Kilic, Sinan
Objective: This study aimed to analyze the associations between age, sex, anthropometric factors, and thyroid volume as well as to determine the prevalence of goiter and thyroid nodules in school children. Methods: This study included schools governed by the Ministry of Education in Van province. Sonographic evaluations of thyroid glands were conducted in children aged 6-17 years, and measurements of weight, height, waist circumference, hip circumference, and skinfold thickness were obtained from the participants. Results: A total of 2284 school children were included in the study. The median age of the participants was 11.08 years. It was observed that thyroid volume exhibited a positive correlation with age, body surface area, body mass index, height, weight, waist circumference, hip circumference, triceps skinfold thickness, and subscapular skinfold thickness (p < 0.008). When assessing the association between age and goiter prevalence based on World Health Organization parameters, 10.2% of children and adolescents developed goiter, and 0.8% of these cases also had a nodule. Among girls, the rates were 9.4% and 1% for goiter and nodules, respectively, whereas among boys, the rates were 11.3% and 0.7%, respectively. Conclusions: Thyroid volume was affected by age, weight, subcutaneous tissue thickness, waist circumference, and BSA. Goiter remains a serious public health problem among school-age children in Van province.
Local Peoples of the South- Eastern Black Sea in the 1st Millennium Bc: New Archaeological Findings
(Mega Publishing House, 2022) Demirel, Serkan; Caliskan Akgul, Hulya; Kilic, Sinan
The Trabzon Archaeological Survey Project was initiated in 2018 with the aim of researching the pre-Classical Period in the south-eastern Black Sea region. This is a period which had not received much attention previously from researchers. In the first two years of the field researches, some archaeological sites (Kalecik/Mile Castle, Konakduzu area, ruins in the Horhor and Sumaha hills) within the boundaries of the Macka district have been discovered, and they were attributed to an early period. These archaeological sites and some of the material remains obtained here are thought to belong to the local peoples of the region mentioned in ancient Greek and Roman texts. The survey project reveals some significant results in compare of descriptions about the local peoples in ancient texts and archaeological evidence of the contemporary neighboring cultures. Thus, it can be said that for the first time, archaeological evidence about the ancient peoples in the region has been obtained.
Preliminary Chemical and Micromorphological Observations on Urartu (800-600 Bc) Ceramics, Eastern Turkey
(John Wiley & Sons inc, 2010) Akca, Erhan; Arocena, Joselito; Kilic, Sinan; Dingil, Mahmut; Kapur, Selim
Anatolia has long been a major pottery production center of the ancient world, dating back 7000 cal yr B.P. The Early Iron Age Urartu Kingdom (800-600 B.C.) of eastern Anatolia is known for the production of high-quality pottery, but little is known regarding firing technology and manufacture of these ceramics. Here we present a preliminary study of Urartu ceramic micromorphology and chemistry and suggest that the Urartus had good knowledge of local geology and intentionally used chemical fluxes (Pb, Rb, and Li) to attain desired firing temperatures. The sophisticated production of Urartu ceramics is comparable to later high-quality Roman pottery (terra sigillata) procured from the same area. (C) 2010 Wiley Periodicals, Inc.
A Report on the Medieval Mining and Ore Processing Complex: Zilan Valley, Van, Turkey
(Univ Agean, dept Mediterranean Stud, 2012) Ates, Yusuf; Kilic, Sinan
Literature has records of the use of obsidian that shows the existence of a knowledge base on raw material resources around Lake Van extending to very ancient times. Against this background, very little information can be obtained from literature about accurate location of historical mining activities in the region today. An ancient mining and processing complex, located northwest of the city of Van (Turkey) has been discovered by chance in 2007. The purpose of this article is to describe this historical mining area. The site contains mining structures such as shafts and galleries, and heaves of stone chips indicating some ore enrichment activities taking place there. The XRD and chemical analyses show the samples taken from the ore vein are rich in Manganese (Mn) and Barium (Ba), and it is concluded that the Zilan Valley Mining and Processing Complex was for Pyrolusite (MnO2), Barium or both. The site is being described for the first time in the literature and offers an opportunity to fulfill the gap in literature regarding mining history. The discovery and the description of the site would also have implications in a wide multidisciplinary scientific community, including metallurgy, archeology, and world heritage.