Timuçin Çiçek | Okan University (original) (raw)
Papers by Timuçin Çiçek
Iranian Journal of Fisheries Sciences, 2017
This study was carried out to determine some biological characteristics including age, growth and... more This study was carried out to determine some biological characteristics including age, growth and somatic condition of Carasobarbus luteus and Capoeta trutta in the Turkish part of the Tigris River. The examined samples of C. luteus were distributed between II-IX years of age. The length-weigth relations of females and males were calculated as Log W =-4.7314 +3.0113 Log FL and Log W = -4.7631 +3.0263 Log FL respectively. Von Bertalanffy growth equations were estimated as Lt=40.09 [1-e^-0.087036 (t+1.55004)] for females and Lt=38.14 [1-e^-0.080056 (t+2.34838)] for males. The somatic condition was 1.9667 ± 0.1751 for females and 1.9967 ± 0.4205 for males. The observed samples of C. trutta were distributed between I-VI years of age. The length-weigth relationship of females and males were calculated as Log W = -4.6845 + 2.9303 Log FL, Log W = -4.7784 + 2.9746 Log FL, respectively. Von Bertalanffy growth equations were estimated as Lt=35.36 [1-e^-0.082817 (t+4.82738)] for females and Lt...
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BackgroundToday, COVID-19 pandemic has brought countries’ health services into sharp focus. Despi... more BackgroundToday, COVID-19 pandemic has brought countries’ health services into sharp focus. Despite the low incidence of cases(1.2%) and high mortality rate(2.4%) among Turkish population, the low mortality rate(0.3%) despite the high incidence(11.5%) declared in healthcare workers drew our group’s attention. Therefore, we aimed to report the characteristics of infected health-care workers and investigate the relationship between BCG vaccine and tuberculosis history with COVID-19 mortality in infected health-care worker population.MethodThis study was conducted in three hospitals to assess the clinical presentations, disease severity and correlation with BCG vaccine and tuberculous history in COVID-19 positive health-care workers by an online questionnaire platform. The relationship between characteristics and tuberculosis history were investigated according to hospitalization status of the patients.ResultTotal of 465 infected healthcare workers included in the study. The rate of hi...
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Journal of Survey in Fisheries Sciences
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Journal of Survey in Fisheries Sciences
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Journal of Applied Ichthyology
Summary The big-scale sand smelt, Atherina boyeri, is recorded from the Devegecidi Dam Lake in 20... more Summary The big-scale sand smelt, Atherina boyeri, is recorded from the Devegecidi Dam Lake in 2016, the first record of this invasive species in the Tigris River basin, with potential to extend to all countries in the Middle East. The smelts were caught with a trawl net mesh size of 6 mm. The captured specimens are described and compared. Records of A. boyeri from Turkish inland waters are summarised from the literature.
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ABSTRACT
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Construction and Building Materials, 2015
Abstract Fly ash is one of the coal combustion products (CCPs) of coal burning power plants and i... more Abstract Fly ash is one of the coal combustion products (CCPs) of coal burning power plants and it contains substantial amounts of potentially harmful constituents to the environment. It is known that nearly 600 million tons of fly ash is produced in the world per-annum. In Turkey, the annual production of fly ash is, on average, 13 million tons and only a small amount of this is utilized. This study examines the production of light-weight, high thermal insulating bricks made out of the fly ash and lime. Cylindrical brick samples were produced through steam curing of Seyitomer thermal power plant fly ash and lime mixtures in an autoclave in order to determine the optimum conditions for mechanically sound bricks. Subsequently, at the optimum conditions determined, real-size bricks were produced and subjected to standard tests. The findings of this paper suggest that fly ash/lime bricks can be an alternative product to aerated cellular concrete.
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In this study, the conditions of heavy media separation of Soma-Eynez coal, which is mined by the... more In this study, the conditions of heavy media separation of Soma-Eynez coal, which is mined by the Hüstaş Mining Com¬pany, are investigated. For this purpose, a se¬ries of separation tests were conducted using a pilot scale heavy media separation drum. Based on the obtained upgrading results the washability of the test coal is evaluated. Fur¬thermore, for different clean coal qualities, the expected upgrading results are computed un¬der consideration of the actual test results.
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Asian Journal of Chemistry
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Mineral Processing and Extractive Metallurgy, 2010
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Mineral Processing and Extractive Metallurgy, 2008
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Türk Üroloji Dergisi, 2009
... Percutaneous nephrolithotomy in patients who previously underwent open nephrolithotomy. J End... more ... Percutaneous nephrolithotomy in patients who previously underwent open nephrolithotomy. J Endourol 2005;19:1161-4. 6. Tuğcu V, Su FE, Kalfazade N, Şahin S, Özbay B, Taşçı AI. ... J Endourol 2006;20:17-20. Yazışma (Correspondence): Dr. Murat Gönen. ...
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Key Engineering Materials - KEY ENG MAT, 2004
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Journal of Applied Ichthyology, 2011
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Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2008
Gravity concentration of hard lignites using conventional jigs and heavy media separation equipme... more Gravity concentration of hard lignites using conventional jigs and heavy media separation equipment is prone to produce coal-rich fine tailings. This study aims to establish a fine coal recovery process of very high efficiency at reasonable capital investment and operational costs. The technical feasibility to upgrade the properties of the predeslimed fine refuse of a lignite washing plant with 35.9%
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Minerals engineering, 2002
The total amount of fine chromite gravity tailings in Turkey is around 3,000,000 tons with a quit... more The total amount of fine chromite gravity tailings in Turkey is around 3,000,000 tons with a quite high Cr2O3 content of about 920%. These fines are produced as a result of the inefficiency of conventional separation equipment at fine particle size due to finely grained ...
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Iranian Journal of Fisheries Sciences, 2017
This study was carried out to determine some biological characteristics including age, growth and... more This study was carried out to determine some biological characteristics including age, growth and somatic condition of Carasobarbus luteus and Capoeta trutta in the Turkish part of the Tigris River. The examined samples of C. luteus were distributed between II-IX years of age. The length-weigth relations of females and males were calculated as Log W =-4.7314 +3.0113 Log FL and Log W = -4.7631 +3.0263 Log FL respectively. Von Bertalanffy growth equations were estimated as Lt=40.09 [1-e^-0.087036 (t+1.55004)] for females and Lt=38.14 [1-e^-0.080056 (t+2.34838)] for males. The somatic condition was 1.9667 ± 0.1751 for females and 1.9967 ± 0.4205 for males. The observed samples of C. trutta were distributed between I-VI years of age. The length-weigth relationship of females and males were calculated as Log W = -4.6845 + 2.9303 Log FL, Log W = -4.7784 + 2.9746 Log FL, respectively. Von Bertalanffy growth equations were estimated as Lt=35.36 [1-e^-0.082817 (t+4.82738)] for females and Lt...
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BackgroundToday, COVID-19 pandemic has brought countries’ health services into sharp focus. Despi... more BackgroundToday, COVID-19 pandemic has brought countries’ health services into sharp focus. Despite the low incidence of cases(1.2%) and high mortality rate(2.4%) among Turkish population, the low mortality rate(0.3%) despite the high incidence(11.5%) declared in healthcare workers drew our group’s attention. Therefore, we aimed to report the characteristics of infected health-care workers and investigate the relationship between BCG vaccine and tuberculosis history with COVID-19 mortality in infected health-care worker population.MethodThis study was conducted in three hospitals to assess the clinical presentations, disease severity and correlation with BCG vaccine and tuberculous history in COVID-19 positive health-care workers by an online questionnaire platform. The relationship between characteristics and tuberculosis history were investigated according to hospitalization status of the patients.ResultTotal of 465 infected healthcare workers included in the study. The rate of hi...
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Journal of Survey in Fisheries Sciences
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Journal of Survey in Fisheries Sciences
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Journal of Applied Ichthyology
Summary The big-scale sand smelt, Atherina boyeri, is recorded from the Devegecidi Dam Lake in 20... more Summary The big-scale sand smelt, Atherina boyeri, is recorded from the Devegecidi Dam Lake in 2016, the first record of this invasive species in the Tigris River basin, with potential to extend to all countries in the Middle East. The smelts were caught with a trawl net mesh size of 6 mm. The captured specimens are described and compared. Records of A. boyeri from Turkish inland waters are summarised from the literature.
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ABSTRACT
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Construction and Building Materials, 2015
Abstract Fly ash is one of the coal combustion products (CCPs) of coal burning power plants and i... more Abstract Fly ash is one of the coal combustion products (CCPs) of coal burning power plants and it contains substantial amounts of potentially harmful constituents to the environment. It is known that nearly 600 million tons of fly ash is produced in the world per-annum. In Turkey, the annual production of fly ash is, on average, 13 million tons and only a small amount of this is utilized. This study examines the production of light-weight, high thermal insulating bricks made out of the fly ash and lime. Cylindrical brick samples were produced through steam curing of Seyitomer thermal power plant fly ash and lime mixtures in an autoclave in order to determine the optimum conditions for mechanically sound bricks. Subsequently, at the optimum conditions determined, real-size bricks were produced and subjected to standard tests. The findings of this paper suggest that fly ash/lime bricks can be an alternative product to aerated cellular concrete.
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In this study, the conditions of heavy media separation of Soma-Eynez coal, which is mined by the... more In this study, the conditions of heavy media separation of Soma-Eynez coal, which is mined by the Hüstaş Mining Com¬pany, are investigated. For this purpose, a se¬ries of separation tests were conducted using a pilot scale heavy media separation drum. Based on the obtained upgrading results the washability of the test coal is evaluated. Fur¬thermore, for different clean coal qualities, the expected upgrading results are computed un¬der consideration of the actual test results.
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Asian Journal of Chemistry
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Mineral Processing and Extractive Metallurgy, 2010
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Mineral Processing and Extractive Metallurgy, 2008
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Türk Üroloji Dergisi, 2009
... Percutaneous nephrolithotomy in patients who previously underwent open nephrolithotomy. J End... more ... Percutaneous nephrolithotomy in patients who previously underwent open nephrolithotomy. J Endourol 2005;19:1161-4. 6. Tuğcu V, Su FE, Kalfazade N, Şahin S, Özbay B, Taşçı AI. ... J Endourol 2006;20:17-20. Yazışma (Correspondence): Dr. Murat Gönen. ...
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Key Engineering Materials - KEY ENG MAT, 2004
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Journal of Applied Ichthyology, 2011
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Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2008
Gravity concentration of hard lignites using conventional jigs and heavy media separation equipme... more Gravity concentration of hard lignites using conventional jigs and heavy media separation equipment is prone to produce coal-rich fine tailings. This study aims to establish a fine coal recovery process of very high efficiency at reasonable capital investment and operational costs. The technical feasibility to upgrade the properties of the predeslimed fine refuse of a lignite washing plant with 35.9%
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Minerals engineering, 2002
The total amount of fine chromite gravity tailings in Turkey is around 3,000,000 tons with a quit... more The total amount of fine chromite gravity tailings in Turkey is around 3,000,000 tons with a quite high Cr2O3 content of about 920%. These fines are produced as a result of the inefficiency of conventional separation equipment at fine particle size due to finely grained ...
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