Füsun Çam - Academia.edu (original) (raw)

Papers by Füsun Çam

CLEAN – Soil, Air, Water

In general people spend most of their time in enclosed environments, therefore, they are exposed ... more In general people spend most of their time in enclosed environments, therefore, they are exposed to indoor radon and its progeny. The paper discusses the variables influencing indoor radon levels. It assesses the correlation between indoor radon levels with temperature, humidity, and pressure, as well as seasonal variables. Radon activity concentrations were measured in Ege University's laboratories and Classroom using a digital radon gas detector. After statistical analysis, the results were compared to committee‐permissible limit levels (ICRP, WHO, and EU). It was found that the average radon activity concentrations were below the recommended 300 Bq m–3 limit value (EU), ranging from 58.4 to 216.0 Bq m–3. This study emphasized the significance of measuring and assessing the indoor radon levels in laboratories and classrooms in particular, in order to safeguard the students and faculty members from radon‐related health issues.

Erzincan University Journal of Science and Technology, Aug 31, 2021

In the current study, it was shown that polystyrene (PS) composites holding tungsten (VI) oxide w... more In the current study, it was shown that polystyrene (PS) composites holding tungsten (VI) oxide were formed in groups (10% to 50%) by radical polymerization. For this goal, the styrene reacted with BPO for 2.5 hours at 70 °C in tetrahydrofuran (THF) to give the consistent polymer. Synthesized PS were defined by FTIR, GPC (Mn = 7900 g/mol PDI = 1.66), SEM and 1H NMR spectroscopy. PS-tungsten (VI) oxide composites formed between 80-85°C. The gamma-ray of composites was calculated using the NaI(Tl) scintillation detector. Linear attenuation coefficients were also estimated hypothetically by the XCOM platform, taking into account the fundamental analysis of composites and comparing them with empirical outcomes. Among the composites studied, the best protective material was PS-50% W03 with lower absorption thicknesses and a higher linear slimming coefficient. Thermal degradation of unirradiated and irradiated polymer composites has also been examined.

Fen-mühendislik dergisi, May 24, 2021

Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenleri... more Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenlerinin daha detaylı araştırılması, incelenmesi gerekliliğini ortaya koymuştur. Ofis ortamı, az tehlikeli işler sınıfında değerlendirilse de uzun vadede yarattığı dramatik sonuçlar yönünden ofis ortamındaki/bina içi ortamdaki radyasyon riski değerlendirilmelidir. Bu kapsamda sunulan "Güvenli Çalışma Ortamları için Radyasyon Riskinin Değerlendirilmesi" başlıklı bu çalışmada, Ege Üniversitesi kampüsünde öğrenci yoğunluğunun çok olduğu kütüphane, laboratuvar vb. alanlarda iyonlaştırıcı radyasyon kaynağı radon ve iyonlaştırıcı olmayan radyasyon (EMA) ölçümleri yapılarak, sonuçlar ulusal ve uluslararası sınır değerler ile karşılaştırılmış, çalışma alanlarının İş Sağlığı ve Güvenliği yönünden uygunluğu değerlendirilmiştir.

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

In the current study, it was shown that polystyrene (PS) composites holding tungsten (VI) oxide w... more In the current study, it was shown that polystyrene (PS) composites holding tungsten (VI) oxide were formed in groups (10% to 50%) by radical polymerization. For this goal, the styrene reacted with BPO for 2.5 hours at 70 °C in tetrahydrofuran (THF) to give the consistent polymer. Synthesized PS were defined by FTIR, GPC (Mn = 7900 g/mol PDI = 1.66), SEM and 1H NMR spectroscopy. PS-tungsten (VI) oxide composites formed between 80-85°C. The gamma-ray of composites was calculated using the NaI(Tl) scintillation detector. Linear attenuation coefficients were also estimated hypothetically by the XCOM platform, taking into account the fundamental analysis of composites and comparing them with empirical outcomes. Among the composites studied, the best protective material was PS -50% W03 with lower absorption thicknesses and a higher linear slimming coefficient. Thermal degradation of unirradiated and irradiated polymer composites has also been examined

Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenleri... more Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenlerinin daha detaylı araştırılması, incelenmesi gerekliliğini ortaya koymuştur. Ofis ortamı, az tehlikeli işler sınıfında değerlendirilse de uzun vadede yarattığı dramatik sonuçlar yönünden ofis ortamındaki/bina içi ortamdaki radyasyon riski değerlendirilmelidir. Bu kapsamda sunulan "Güvenli Çalışma Ortamları için Radyasyon Riskinin Değerlendirilmesi" başlıklı bu çalışmada, Ege Üniversitesi kampüsünde öğrenci yoğunluğunun çok olduğu kütüphane, laboratuvar vb. alanlarda iyonlaştırıcı radyasyon kaynağı radon ve iyonlaştırıcı olmayan radyasyon (EMA) ölçümleri yapılarak, sonuçlar ulusal ve uluslararası sınır değerler ile karşılaştırılmış, çalışma alanlarının İş Sağlığı ve Güvenliği yönünden uygunluğu değerlendirilmiştir.

Radiation Effects and Defects in Solids

Deu Muhendislik Fakultesi Fen ve Muhendislik, 2021

Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenleri... more Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenlerinin daha detaylı araştırılması, incelenmesi gerekliliğini ortaya koymuştur. Ofis ortamı, az tehlikeli işler sınıfında değerlendirilse de uzun vadede yarattığı dramatik sonuçlar yönünden ofis ortamındaki/bina içi ortamdaki radyasyon riski değerlendirilmelidir. Bu kapsamda sunulan "Güvenli Çalışma Ortamları için Radyasyon Riskinin Değerlendirilmesi" başlıklı bu çalışmada, Ege Üniversitesi kampüsünde öğrenci yoğunluğunun çok olduğu kütüphane, laboratuvar vb. alanlarda iyonlaştırıcı radyasyon kaynağı radon ve iyonlaştırıcı olmayan radyasyon (EMA) ölçümleri yapılarak, sonuçlar ulusal ve uluslararası sınır değerler ile karşılaştırılmış, çalışma alanlarının İş Sağlığı ve Güvenliği yönünden uygunluğu değerlendirilmiştir.

Fast and economical method used for decades in non-destructive analysis of samples with wide spec... more Fast and economical method used for decades in non-destructive analysis of samples with wide spectra from solid to liquid forms, fast neutron activation analysis (FNAA) enables total analysis to be rapidly performed thanks to its great analytical sensitivity and accuracy without requirements for any preliminary processes. The present study accordingly used 14.6 MeV energy-neutrons as the result of 3 H(d,n) 4 He reaction from SAMES T-400 neutron generator and made necessary corrections to determine concentrations of Na, Mg, Al, Si, P, Ca, Fe, Br, K, Sb and Pb in float glass, pyrex and crystal glass [13] produced and commercially used in Turkey. In addition, the results of the study were compared with those of X-ray fluorescence (XRF) spectroscopy.

Progress in Nuclear Energy, 2020

In the current study, it was shown that Poly(HEMA-co-Styrene) composites holding tungsten (VI) ox... more In the current study, it was shown that Poly(HEMA-co-Styrene) composites holding tungsten (VI) oxide were formed in groups (10%-50%) by radical polymerization. For this goal, Styrene and HEMA reacted with AIBN for 2.5 h at 65 � C in tetrahydrofuran (THF) to give the consistent polymer. Synthesized Poly(HEMA-co-Styrene) were defined by FTIR, GPC (Mn ¼ 17,100 g/mol PDI ¼ 2.2) and 1 H NMR spectroscopy. Poly(HEMA-co-Styrene)-tungsten (VI) oxide composites formed between 80 and 85 � C. The linear attenuation coefficients of the composites were measured by the NaI(Tl) gamma spectrometry system. Attenuation coefficients were also estimated hypothetically by the XCOM platform, taking into account the fundamental analysis of composites and comparing them with empirical outcomes. Consistent with the consequences of SEM analysis, there is a homogeneous distribution among tungsten (VI) oxide units and Poly(HEMA-co-Styrene). Shielding parameters as the tenth value thickness, the half-value thickness, and the mean free path were acquired. Among the composites studied, the best protective material was PS þ50% WO 3 with lower absorption thicknesses and a higher linear slimming coefficient. Thermal degradation of unirradiated and irradiated polymer composites has also been examined.

Cukurova University, Agriculture Faculty, 2019

Son yıllarda insanoğlunun güvenilir gıdaya olan ihtiyacı, hiç olmadığı kadar artmıştır. Hızla art... more Son yıllarda insanoğlunun güvenilir gıdaya olan ihtiyacı, hiç olmadığı kadar artmıştır. Hızla artan nüfus, çevre kirliliği ve iklim değişikliği, zirai denetim uygulamaları ve hayvansal üretim maliyetleri dünyada gıda elde etmeyi dahası mevcut gıdaları güvenilir tutabilmeyi zorlaştırmıştır. Gıdaların uzun süreli güvenilir ve sağlıklı kalabilmesi için birçok gıda koruma yöntemi uygulanmışsa da ancak radyasyonun keşfinden sonra bu alanda hızlı bir ilerleme kaydedilmiştir. Farklı gıdalarda radyasyonla (ışınlama) hijyen ve muhafaza uygulamaları denenerek aynı zamanda gıdaların besin değerleri de takip edilmiştir. Daha önemlisi, farklı gıdaların korunması için uygulanması gereken ışınlama miktarları titizlikle belirlenmiştir. Ayrıca ışınlamaya bağlı gıdaların besin değerlerindeki kayıplar ve gıda zehirlenmeleri ile ışınlama uygulamalarının maliyetleri üzerine uzun süreli araştırmalar yapılmıştır. Gıda endüstrisinde lokomotif bir sektör olan ışınlanma uygulamaları ekonomik katkıları hariç gıda hijyeni ve sağlığı açısından en güvenilir yöntem olması ile tüm dünyada en çok başvurulan yöntemdir. Bu derlemede, gıda koruma yöntemleri içinde önemli bir rolü olan "Işınlama" uygulamasının, mikroorganizmalara, gıda bileşenlerine ve ambalajlama materyallerine etkisi, teknolojik gelişimiyle birlikte gıda güvenliği ve tüketici bakış açısıyla değerlendirilmesi amaçlanmıştır.

Materials Chemistry and Physics, 2020

Radiation-shielding properties of PHEMA-WO 3 2H 2 O composites were investigated. � The linear at... more Radiation-shielding properties of PHEMA-WO 3 2H 2 O composites were investigated. � The linear attenuation values were calculated both theoretically and experimental. � The HVL of PHEMA-WO 3 2H 2 O composites remarkable decreased with the amount of WO 3 2H 2 O. � Higher content of WO 3 2H 2 O improved the shielding properties of polymer composites.

Cement and Concrete Composites, 2018

In the study, high consistency heavyweight concrete mixtures containing barite aggregate were pro... more In the study, high consistency heavyweight concrete mixtures containing barite aggregate were produced by using some common mineral admixtures (viscosity modifier, silica fume and fly ash) at various water/binder ratios and binder contents. Gamma-ray linear attenuation coefficients of the concrete mixtures were determined by using gamma sources of 137 Cs and 60 Co in NaI(Tl) gamma spectrometry system. The relationship between specimen thickness and transmission of the rays was constituted by emphasizing their mean free path, half-value layer, and tenth-value layer. Moreover, experimental mass attenuation coefficients of the concrete specimens were determined and compared with theoretical mass attenuation coefficients calculated by XCOM software depending on elemental fractions of these concrete in equivalent energies (662 keV, 1173 keV and 1332 keV). As a result, the replacement of the aforementioned admixtures with ordinary cement negatively affected the linear attenuation coefficients of the heavyweight concrete. A relative change of up to 25% was observed between the least and the highest attenuation thickness values at a certain gamma-ray transmission. A good regression relationship has been established between density and linear attenuation coefficients, density and mean free path, and density and half-or tenth-value layers of the heavyweight concrete. Theoretical (XCOM) mass attenuation coefficients were found similar to the experimental mass attenuation coefficients of the heavyweight concretes. Although there is a good linear regression relation between the theoretical and experimental mass attenuation coefficients at 662 keV energy of gamma rays, the relations were disappeared at 1173 and 1332 keV energies of gamma rays.

Radiation Protection Dosimetry, 2010

The surveys of natural gamma-emitting radionuclides in rocks and soils from the Ezine plutonic ar... more The surveys of natural gamma-emitting radionuclides in rocks and soils from the Ezine plutonic area were conducted during 2007. Direct dose measurement using a survey meter was carried out simultaneously. The present study, which is part of the survey, analysed the activity concentrations of 238 U, 232 Th and 40 K in granitoid samples from all over the region by HPGe gamma spectrometry. The activity concentrations of 226 Ra ranged from 94 to 637 Bq kg 21 , those of 232 Th ranged from 120 to 601 Bq kg 21 and those of 40 K ranged from 1074 to 1527 Bq kg 21 in the analysed rock samples from different parts of the pluton. To evaluate the radiological hazard of the natural radioactivity in the samples, the absorbed dose rate (D), the annual effective dose rate, the radium equivalent activity (Ra eq) and the external (H ex) hazard index were calculated according to the UNSCEAR 2000 report. The thorium-to-uranium concentration ratios were also estimated.

Radiation Protection Dosimetry, 2010

Radiation Protection Dosimetry, 2012

Journal of Radioanalytical and Nuclear Chemistry, 1997

The instrumental neutron activation technique, using the SAMES T-400 neutron generator with 14.6 ... more The instrumental neutron activation technique, using the SAMES T-400 neutron generator with 14.6 MeV neutrons produced from 3H(d,nftHe reaction, is demonstrated for multi-element analysis of Saudi-Arabian crude-oil samples. The system parameters for the absolute method (e.g., the counting. solid-angle, intrinsic efficiency of the y-ray detector, effective neutron flux, activation cross sections, etc.) were determined and the results of elemental concentrations were presented with the corrections for all possible interferences having been carefully conside~d.

Journal of Environmental Science and Health, Part A, 2013

The aim of the study was to conduct a systematic investigation on the natural gamma emitting radi... more The aim of the study was to conduct a systematic investigation on the natural gamma emitting radionuclides ((226)Ra, (232)Th and (40)K) as well as (137)Cs in the surface soils from Kestanbol/Ezine plutonic area in Çanakkale province as part of the environmental monitoring program on radiologic impact of the granitoid areas in Western Anatolia. The activity measurements of the gamma emitters in the surface soil samples collected from 52 sites distributed all over the region has been carried out, by means of HPGe gamma-ray spectrometry system. The activity concentrations of the relevant radionuclides in the soil samples appeared in the ranges as follows: (226)Ra was 20-521 Bq kg(-1); (232)Th, 11-499 Bq kg(-1)and; (40)K, 126-3181 Bq kg(-1), yet the (137)Cs was much lower than 20 Bq kg(-1)at most. Furthermore, based on the available data, the radiation hazard parameters associated with the surveyed soils were calculated. The present data also allowed evaluation of some correlations that may exist in the investigated natural radionuclides of the soil samples from the plutonic area in Çanakkale province. It is concluded from the above that the concerned region did not lead to any significant radiological exposure to the environment.

CLEAN – Soil, Air, Water

In general people spend most of their time in enclosed environments, therefore, they are exposed ... more In general people spend most of their time in enclosed environments, therefore, they are exposed to indoor radon and its progeny. The paper discusses the variables influencing indoor radon levels. It assesses the correlation between indoor radon levels with temperature, humidity, and pressure, as well as seasonal variables. Radon activity concentrations were measured in Ege University's laboratories and Classroom using a digital radon gas detector. After statistical analysis, the results were compared to committee‐permissible limit levels (ICRP, WHO, and EU). It was found that the average radon activity concentrations were below the recommended 300 Bq m–3 limit value (EU), ranging from 58.4 to 216.0 Bq m–3. This study emphasized the significance of measuring and assessing the indoor radon levels in laboratories and classrooms in particular, in order to safeguard the students and faculty members from radon‐related health issues.

Erzincan University Journal of Science and Technology, Aug 31, 2021

In the current study, it was shown that polystyrene (PS) composites holding tungsten (VI) oxide w... more In the current study, it was shown that polystyrene (PS) composites holding tungsten (VI) oxide were formed in groups (10% to 50%) by radical polymerization. For this goal, the styrene reacted with BPO for 2.5 hours at 70 °C in tetrahydrofuran (THF) to give the consistent polymer. Synthesized PS were defined by FTIR, GPC (Mn = 7900 g/mol PDI = 1.66), SEM and 1H NMR spectroscopy. PS-tungsten (VI) oxide composites formed between 80-85°C. The gamma-ray of composites was calculated using the NaI(Tl) scintillation detector. Linear attenuation coefficients were also estimated hypothetically by the XCOM platform, taking into account the fundamental analysis of composites and comparing them with empirical outcomes. Among the composites studied, the best protective material was PS-50% W03 with lower absorption thicknesses and a higher linear slimming coefficient. Thermal degradation of unirradiated and irradiated polymer composites has also been examined.

Fen-mühendislik dergisi, May 24, 2021

Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenleri... more Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenlerinin daha detaylı araştırılması, incelenmesi gerekliliğini ortaya koymuştur. Ofis ortamı, az tehlikeli işler sınıfında değerlendirilse de uzun vadede yarattığı dramatik sonuçlar yönünden ofis ortamındaki/bina içi ortamdaki radyasyon riski değerlendirilmelidir. Bu kapsamda sunulan "Güvenli Çalışma Ortamları için Radyasyon Riskinin Değerlendirilmesi" başlıklı bu çalışmada, Ege Üniversitesi kampüsünde öğrenci yoğunluğunun çok olduğu kütüphane, laboratuvar vb. alanlarda iyonlaştırıcı radyasyon kaynağı radon ve iyonlaştırıcı olmayan radyasyon (EMA) ölçümleri yapılarak, sonuçlar ulusal ve uluslararası sınır değerler ile karşılaştırılmış, çalışma alanlarının İş Sağlığı ve Güvenliği yönünden uygunluğu değerlendirilmiştir.

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

In the current study, it was shown that polystyrene (PS) composites holding tungsten (VI) oxide w... more In the current study, it was shown that polystyrene (PS) composites holding tungsten (VI) oxide were formed in groups (10% to 50%) by radical polymerization. For this goal, the styrene reacted with BPO for 2.5 hours at 70 °C in tetrahydrofuran (THF) to give the consistent polymer. Synthesized PS were defined by FTIR, GPC (Mn = 7900 g/mol PDI = 1.66), SEM and 1H NMR spectroscopy. PS-tungsten (VI) oxide composites formed between 80-85°C. The gamma-ray of composites was calculated using the NaI(Tl) scintillation detector. Linear attenuation coefficients were also estimated hypothetically by the XCOM platform, taking into account the fundamental analysis of composites and comparing them with empirical outcomes. Among the composites studied, the best protective material was PS -50% W03 with lower absorption thicknesses and a higher linear slimming coefficient. Thermal degradation of unirradiated and irradiated polymer composites has also been examined

Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenleri... more Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenlerinin daha detaylı araştırılması, incelenmesi gerekliliğini ortaya koymuştur. Ofis ortamı, az tehlikeli işler sınıfında değerlendirilse de uzun vadede yarattığı dramatik sonuçlar yönünden ofis ortamındaki/bina içi ortamdaki radyasyon riski değerlendirilmelidir. Bu kapsamda sunulan "Güvenli Çalışma Ortamları için Radyasyon Riskinin Değerlendirilmesi" başlıklı bu çalışmada, Ege Üniversitesi kampüsünde öğrenci yoğunluğunun çok olduğu kütüphane, laboratuvar vb. alanlarda iyonlaştırıcı radyasyon kaynağı radon ve iyonlaştırıcı olmayan radyasyon (EMA) ölçümleri yapılarak, sonuçlar ulusal ve uluslararası sınır değerler ile karşılaştırılmış, çalışma alanlarının İş Sağlığı ve Güvenliği yönünden uygunluğu değerlendirilmiştir.

Radiation Effects and Defects in Solids

Deu Muhendislik Fakultesi Fen ve Muhendislik, 2021

Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenleri... more Öz Son yıllarda ofislerde meydana gelen meslek hastalıklarının artması ofis ortamı risk etmenlerinin daha detaylı araştırılması, incelenmesi gerekliliğini ortaya koymuştur. Ofis ortamı, az tehlikeli işler sınıfında değerlendirilse de uzun vadede yarattığı dramatik sonuçlar yönünden ofis ortamındaki/bina içi ortamdaki radyasyon riski değerlendirilmelidir. Bu kapsamda sunulan "Güvenli Çalışma Ortamları için Radyasyon Riskinin Değerlendirilmesi" başlıklı bu çalışmada, Ege Üniversitesi kampüsünde öğrenci yoğunluğunun çok olduğu kütüphane, laboratuvar vb. alanlarda iyonlaştırıcı radyasyon kaynağı radon ve iyonlaştırıcı olmayan radyasyon (EMA) ölçümleri yapılarak, sonuçlar ulusal ve uluslararası sınır değerler ile karşılaştırılmış, çalışma alanlarının İş Sağlığı ve Güvenliği yönünden uygunluğu değerlendirilmiştir.

Fast and economical method used for decades in non-destructive analysis of samples with wide spec... more Fast and economical method used for decades in non-destructive analysis of samples with wide spectra from solid to liquid forms, fast neutron activation analysis (FNAA) enables total analysis to be rapidly performed thanks to its great analytical sensitivity and accuracy without requirements for any preliminary processes. The present study accordingly used 14.6 MeV energy-neutrons as the result of 3 H(d,n) 4 He reaction from SAMES T-400 neutron generator and made necessary corrections to determine concentrations of Na, Mg, Al, Si, P, Ca, Fe, Br, K, Sb and Pb in float glass, pyrex and crystal glass [13] produced and commercially used in Turkey. In addition, the results of the study were compared with those of X-ray fluorescence (XRF) spectroscopy.

Progress in Nuclear Energy, 2020

In the current study, it was shown that Poly(HEMA-co-Styrene) composites holding tungsten (VI) ox... more In the current study, it was shown that Poly(HEMA-co-Styrene) composites holding tungsten (VI) oxide were formed in groups (10%-50%) by radical polymerization. For this goal, Styrene and HEMA reacted with AIBN for 2.5 h at 65 � C in tetrahydrofuran (THF) to give the consistent polymer. Synthesized Poly(HEMA-co-Styrene) were defined by FTIR, GPC (Mn ¼ 17,100 g/mol PDI ¼ 2.2) and 1 H NMR spectroscopy. Poly(HEMA-co-Styrene)-tungsten (VI) oxide composites formed between 80 and 85 � C. The linear attenuation coefficients of the composites were measured by the NaI(Tl) gamma spectrometry system. Attenuation coefficients were also estimated hypothetically by the XCOM platform, taking into account the fundamental analysis of composites and comparing them with empirical outcomes. Consistent with the consequences of SEM analysis, there is a homogeneous distribution among tungsten (VI) oxide units and Poly(HEMA-co-Styrene). Shielding parameters as the tenth value thickness, the half-value thickness, and the mean free path were acquired. Among the composites studied, the best protective material was PS þ50% WO 3 with lower absorption thicknesses and a higher linear slimming coefficient. Thermal degradation of unirradiated and irradiated polymer composites has also been examined.

Cukurova University, Agriculture Faculty, 2019

Son yıllarda insanoğlunun güvenilir gıdaya olan ihtiyacı, hiç olmadığı kadar artmıştır. Hızla art... more Son yıllarda insanoğlunun güvenilir gıdaya olan ihtiyacı, hiç olmadığı kadar artmıştır. Hızla artan nüfus, çevre kirliliği ve iklim değişikliği, zirai denetim uygulamaları ve hayvansal üretim maliyetleri dünyada gıda elde etmeyi dahası mevcut gıdaları güvenilir tutabilmeyi zorlaştırmıştır. Gıdaların uzun süreli güvenilir ve sağlıklı kalabilmesi için birçok gıda koruma yöntemi uygulanmışsa da ancak radyasyonun keşfinden sonra bu alanda hızlı bir ilerleme kaydedilmiştir. Farklı gıdalarda radyasyonla (ışınlama) hijyen ve muhafaza uygulamaları denenerek aynı zamanda gıdaların besin değerleri de takip edilmiştir. Daha önemlisi, farklı gıdaların korunması için uygulanması gereken ışınlama miktarları titizlikle belirlenmiştir. Ayrıca ışınlamaya bağlı gıdaların besin değerlerindeki kayıplar ve gıda zehirlenmeleri ile ışınlama uygulamalarının maliyetleri üzerine uzun süreli araştırmalar yapılmıştır. Gıda endüstrisinde lokomotif bir sektör olan ışınlanma uygulamaları ekonomik katkıları hariç gıda hijyeni ve sağlığı açısından en güvenilir yöntem olması ile tüm dünyada en çok başvurulan yöntemdir. Bu derlemede, gıda koruma yöntemleri içinde önemli bir rolü olan "Işınlama" uygulamasının, mikroorganizmalara, gıda bileşenlerine ve ambalajlama materyallerine etkisi, teknolojik gelişimiyle birlikte gıda güvenliği ve tüketici bakış açısıyla değerlendirilmesi amaçlanmıştır.

Materials Chemistry and Physics, 2020

Radiation-shielding properties of PHEMA-WO 3 2H 2 O composites were investigated. � The linear at... more Radiation-shielding properties of PHEMA-WO 3 2H 2 O composites were investigated. � The linear attenuation values were calculated both theoretically and experimental. � The HVL of PHEMA-WO 3 2H 2 O composites remarkable decreased with the amount of WO 3 2H 2 O. � Higher content of WO 3 2H 2 O improved the shielding properties of polymer composites.

Cement and Concrete Composites, 2018

In the study, high consistency heavyweight concrete mixtures containing barite aggregate were pro... more In the study, high consistency heavyweight concrete mixtures containing barite aggregate were produced by using some common mineral admixtures (viscosity modifier, silica fume and fly ash) at various water/binder ratios and binder contents. Gamma-ray linear attenuation coefficients of the concrete mixtures were determined by using gamma sources of 137 Cs and 60 Co in NaI(Tl) gamma spectrometry system. The relationship between specimen thickness and transmission of the rays was constituted by emphasizing their mean free path, half-value layer, and tenth-value layer. Moreover, experimental mass attenuation coefficients of the concrete specimens were determined and compared with theoretical mass attenuation coefficients calculated by XCOM software depending on elemental fractions of these concrete in equivalent energies (662 keV, 1173 keV and 1332 keV). As a result, the replacement of the aforementioned admixtures with ordinary cement negatively affected the linear attenuation coefficients of the heavyweight concrete. A relative change of up to 25% was observed between the least and the highest attenuation thickness values at a certain gamma-ray transmission. A good regression relationship has been established between density and linear attenuation coefficients, density and mean free path, and density and half-or tenth-value layers of the heavyweight concrete. Theoretical (XCOM) mass attenuation coefficients were found similar to the experimental mass attenuation coefficients of the heavyweight concretes. Although there is a good linear regression relation between the theoretical and experimental mass attenuation coefficients at 662 keV energy of gamma rays, the relations were disappeared at 1173 and 1332 keV energies of gamma rays.

Radiation Protection Dosimetry, 2010

The surveys of natural gamma-emitting radionuclides in rocks and soils from the Ezine plutonic ar... more The surveys of natural gamma-emitting radionuclides in rocks and soils from the Ezine plutonic area were conducted during 2007. Direct dose measurement using a survey meter was carried out simultaneously. The present study, which is part of the survey, analysed the activity concentrations of 238 U, 232 Th and 40 K in granitoid samples from all over the region by HPGe gamma spectrometry. The activity concentrations of 226 Ra ranged from 94 to 637 Bq kg 21 , those of 232 Th ranged from 120 to 601 Bq kg 21 and those of 40 K ranged from 1074 to 1527 Bq kg 21 in the analysed rock samples from different parts of the pluton. To evaluate the radiological hazard of the natural radioactivity in the samples, the absorbed dose rate (D), the annual effective dose rate, the radium equivalent activity (Ra eq) and the external (H ex) hazard index were calculated according to the UNSCEAR 2000 report. The thorium-to-uranium concentration ratios were also estimated.

Radiation Protection Dosimetry, 2010

Radiation Protection Dosimetry, 2012

Journal of Radioanalytical and Nuclear Chemistry, 1997

The instrumental neutron activation technique, using the SAMES T-400 neutron generator with 14.6 ... more The instrumental neutron activation technique, using the SAMES T-400 neutron generator with 14.6 MeV neutrons produced from 3H(d,nftHe reaction, is demonstrated for multi-element analysis of Saudi-Arabian crude-oil samples. The system parameters for the absolute method (e.g., the counting. solid-angle, intrinsic efficiency of the y-ray detector, effective neutron flux, activation cross sections, etc.) were determined and the results of elemental concentrations were presented with the corrections for all possible interferences having been carefully conside~d.

Journal of Environmental Science and Health, Part A, 2013

The aim of the study was to conduct a systematic investigation on the natural gamma emitting radi... more The aim of the study was to conduct a systematic investigation on the natural gamma emitting radionuclides ((226)Ra, (232)Th and (40)K) as well as (137)Cs in the surface soils from Kestanbol/Ezine plutonic area in Çanakkale province as part of the environmental monitoring program on radiologic impact of the granitoid areas in Western Anatolia. The activity measurements of the gamma emitters in the surface soil samples collected from 52 sites distributed all over the region has been carried out, by means of HPGe gamma-ray spectrometry system. The activity concentrations of the relevant radionuclides in the soil samples appeared in the ranges as follows: (226)Ra was 20-521 Bq kg(-1); (232)Th, 11-499 Bq kg(-1)and; (40)K, 126-3181 Bq kg(-1), yet the (137)Cs was much lower than 20 Bq kg(-1)at most. Furthermore, based on the available data, the radiation hazard parameters associated with the surveyed soils were calculated. The present data also allowed evaluation of some correlations that may exist in the investigated natural radionuclides of the soil samples from the plutonic area in Çanakkale province. It is concluded from the above that the concerned region did not lead to any significant radiological exposure to the environment.