DOÇ. DR. GAYE ÖZGÜR ÇAKAL    
Name : GAYE ÖZGÜR
Surname : ÇAKAL
E-Mail : gcakal@ankara.edu.tr
Phone Number : (312) 212 8577
Title : DOÇ. DR.
Unit : INSTITUTE OF NUCLEAR SCIENCES
Department : Nuclear Research and Technologies Department
ABS Url:https://abs.ankara.edu.tr/gaye-ozgur-cakal
Personal Information


ACADEMIC CAREER

 

1995    BSc. - Middle East Technical University - Department of Chemical Engineering

1998    MSc. - Middle East Technical University - Department of Chemical Engineering

2004    Ph.D. - Middle East Technical University - Department of Chemical Engineering

2012    Asst. Prof. Dr.   Ankara University - Institute of Nuclear Sciences

2017    Assoc. Prof. Dr. Ankara University

 

 EMPLOYMENT

 

1993               Summer Practice,

Low Density Polyethylene Plant, Petkim Petrochemical Complex, Aliağa, İzmir

1997-2005       Research Assistant

Middle East Technical University - Department of Chemical Engineering

2004 – 2005     Project Supervisor

Establishing a Pilot Plant and Laboratory to Produce Boron Compounds

National Boron Research Institute - METU Department of Chemical Engineering

2005 - 2012     Specialist, Project Supervisor

Turkish Ministry of Energy, National Boron Research Institute

2012-               Asst. Prof. Dr., Ankara University - Institute of Nuclear Sciences

2015-               Vice Director, Ankara University - Institute of Nuclear Sciences

2018-               Assoc. Prof. Dr., Ankara University - Institute of Nuclear Sciences

2018-               Head of Nuclear Research and Technologies Department

 

 

RESEARCH AREAS

 

Gross Alpha/Beta Activity Determination in water samples using Proportional Counter and Liquid Scintillation Counting (LSC)

Activity determination of 210Po and 210Pb in soil/sediment samples using Alpha Spectrometry and LSC

Activity determination of 90Sr in environmental samples using LSC

Electrodeposition of 241Am

Boron Nitride Coating and its Medical Applications

Use of Boron Products as Dosimetric  Material

Radionuclide Adsorption on Different Adsorbents

 

 LECTURES GIVEN

 

Radiochemistry 1

Radiochemical Applications Laboratory (Proportional Counter, Alpha Spectrometry, LSC)

Mass and Energy Balances in Chemical Engineering

Advanced Nuclear Heat Transfer

Research Methods

Electricity Production Using Nuclear Energy

Fluid Mechanics

Mass Transfer in Biomedical Engineering

 

 THESIS SUPERVISED

 

1. Rufiyet Güven, Application of A Standard Method for the Measurement of Gross Alpha and Beta Activites in Drinking Water by Using Low Level Scintillation Counting (LSC) Technique, MSc, August 2015

2. Sezen Limon, Determination of 210Pb and 210Po Activity Concentrations in Sediments by Using Radiochemical Separation Techniques, MSc, June 2016

3. Elçin İlke OKUR, The Effect of the Use of Thermoplastic Mask on Skin Dose in Head and Neck Irradiation, Health Physics MSc,2019 (co-supervisor)

4. Miray BAŞDOĞAN, Gamma Dose Rate Effects in TL, OSL and EPR of Various Luminescence Dosimetric Materials, Health Physics MSc

 

 

PUBLICATIONS

THESIS

 

1.    Çakal Gaye Ö., “Study of Reactivity of Coal in Carbonization and Gasification by Thermogravimetric Analysis”, MSc Dissertation, METU Department of Chemical Engineering, September 1998. 

2.    Çakal Gaye Ö., “Dynamic Behavior of Continuous Flow Stirred Slurry Reactors in Boric Acid Production”, PhD Dissertation, METU Department of Chemical Engineering, June 2004.

 

 

PAPERS

 

1.    Çakal G.Ö., Eroğlu, İ., Özkar, S., “Gypsum Crystal Size Distribution in Four Continuous Flow Stirred Slurry Boric Acid Reactors in Series Compared with the Batch”, Journal of Crystal Growth, Vol. 290, pp. 197-202, 2006.

2.    Çakal G.Ö., Yücel H., Gürüz A.G., “Physical And Chemical Properties of Selected Turkish Lignites and Their Pyrolysis and Gasifıcation Rates Determined By Thermogravimetric Analysis”, Journal of Analytical and Applied Pyrolysis, Vol. 80, pp. 262-268, 2007.

3.    Çakal G.Ö., Eroğlu, İ., Özkar, S., “Simulation Of Gypsum Crystallization in Continuous Boric Acid Slurry Reactors by Microfluid and Macrofluid Models”, Journal of Crystal Growth, Vol. 360, pp. 240-247, 2007.

4.    Gürhan D., Çakal G.Ö., Eroğlu, İ., Özkar, S., “Improved Synthesis of Fine Zinc Borate Particles Using Seed Crystals”, Journal of Crystal Growth, Vol. 311, pp. 1545-1552, 2009.

5.    Kılınç M., Çakal G.Ö., Yeşil S., Bayram G., Eroğlu, İ., Özkar, S., “Scale Up Synthesis of Zinc Borate From The Reaction of Zinc Oxide and Boric Acid in Aqueous Medium”, Journal of Crystal Growth, Vol. 312, pp. 3361-3366, 2010.

6.    Çakal G.Ö., Göğebakan Z., Coşkun S., “Investigation of Synergistic Effect of Boron on Fire Retardancy of Cotton Fabrics”, Tekstil ve Konfeksiyon, Vol. 21, Issue: 3, pp. 265-271, 2011.

7.    Çağlar G.S., Çakal G.Ö., Yüce E., Pabuccu R., “Evaluation of Serum Boron Levels and Lipid Profile In Pregnancies With or Without Gestational Diabetes”, Journal of Perinatal Medicine, Vol. 40, Issue 2, pp. 137-140, 2012.

8.    Çakal G.Ö., “Production of fine zinc borate in industrial scale”, Chemical Industry & Chemical Engineering Quarterly, Vol. 18, Issue 4, pp. 547−553, 2012.

9.    A.G. Çelik, A.M. Kılıç, G.Ö. Çakal, “Expanded Perlite Aggregate Characterization for Use as a Lightweight Construction Raw Material", Physicochemical Problems of Mineral Processing, 49(2), 689-700, 2013.

10.  B. Baltacı, G.Ö. Çakal, G. Bayram, İ. Eroğlu, S. Özkar, “Surfactant Modified Zinc Borate Synthesis and Its Effect on the Properties of PET”, Powder Technology, 244, 38-44, 2013.

11.  H. Yücel, G.Ö. Çakal, A.Ö. Yüksel, R. Kurt, E. Uyar, S. Güven, H. Hancı, “Nükleer Adli Bilim ve İnceleme Konuları/ Nuclear Forensics and Its Investigation Topics ”, Adli Bilimler Dergisi/Forensic Sciences Journal, 12(1), 37-48, 2013. (Turkish)

12.  G.S. Çağlar, G.O. Cakal,M. Kiseli, “Umbilical Cord Boron Levels in Term Gestations”, Trace Elements and Electrolytes, 32, 37-41, 2014.

13.  M. Kilinc, G.O. Cakal, G. Bayram, I. Eroglu, S. Ozkar, Flame Retardancy and Mechanical Properties of PET-Based Composites Containing Phosphorus and Boron-Based Additives, Journal of Applied Polymer Science, 2015. DOI: 10.1002/app.42016

14.  G.Ö. Çakal, R. Güven, H. Yücel, An Application of LSC Method for the Measurement of Gross Alpha and Beta Activities in Spiked Water and Drinking Water Samples, Nukleonika, 60 (3), 637-642, 2015. DOI: 10.1515/nuka-2015-0089

15.  A.G. Celik, G.O. Cakal “Characterization of Espey Colemanite and Variation of its Physical Properties With Temperature”, Physicochemical Problems of Mineral Processing, 52(1), 66−76, 2016.

16.  C. Gökmenoğlu, N. Ozmeric, G. Çakal, N. Dökmetas, C. Ergene, B. Kaftanoğlu, “Coating of Titanium Implants with Boron Nitride by RF Magnetron Sputtering”, Bulletin of Material Science, 39(5), 1363–1370, 2016.

17.  Çakal Gaye Ö., Gökmenoğlu C., Kaftanoğlu B., Özmeriç N., “Surface Characterization and Corrosion Resistance of Boron Nitride Coated Titanium Dental Implants” Physicochemical Problems of Materials Protection, 55(3), 608-614, 2019.

18.  G.Ö. Çakal, B. Baltacı, G. Bayram, S. Özkar, I. Eroglu, “Zinc Borate Synthesis With Water Soluble Additives: Kinetics And Product Characterization”, Journal of Crystal Growth, Volume 533, 125461, 2020.

19.  G.S. Polymeris, M. Başdoğan, G.Ö. Çakal, E. Aşlar, N. Meriç, “Gamma dose rate effects in luminescence signals of various artificial, well established dosimetric phosphors”, Radiation Measurements, Volume 133, 106282, 2020.

20.  A.G. Çelik, G.Ö. Çakal, “Refiner production of sodium perborate and hydrogen peroxide bleached mechanical pulp: characterization and physicomechanical properties”, Cellulose Chemistry and Technology 54 (7-8), 735-743, 2020.

 

INTERNATIONAL CONFERENCE PAPERS

 

1.    A.Erdoğdu, G.Ö.Çakal, N.Özkar, S.Özkar, İ. Eroğlu, “Effect of Particle Size of Colemanite on Gypsum Crystallization During Boric Acid Production”, pp. 42-49, WASIC Workshop on Advance in Sensoring in Industrial Crystallization, 18-20 June 2003, İstanbul, Turkey

2.    G.Ö. Çakal, A. Erdoğdu, N. Özkar, S. Özkar, İ. Eroğlu, “Simulation of Gypsum Crystallization in Continuous Boric Acid Reactors by Microfluid and Macrofluid Models”, pp. 50-57, WASIC Workshop on Advance in Sensoring in Industrial Crystallization, 18-20 June 2003, İstanbul, Turkey

3.    A. Erdoğdu, G.Ö. Çakal, S. Özkar, İ. Eroğlu, “The Effect of Stirring Rate on the Dissolution of Colemanite and Particle Size of Gypsum Crystals during the Boric Acid Production in a Batch Reactor”, pp. 319-325,  Proceedings of the 2nd  International Boron Symposium, 23-25 September 2004, Eskişehir, Turkey

4.    G.Ö. Çakal, A. Erdoğdu, İ. Eroğlu, S. Özkar, “Comparison of the Particle Sizes of Gypsum Crystals Obtained in the Production of Boric Acid by Batch and Continuous Flow Systems”, pp. 311-318,  Proceedings of the 2nd  International Boron Symposium, 23-25 September 2004, Eskişehir, Turkey

5.    G.Ö. Çakal, S. Özkar, İ. Eroğlu, ”Particle Size Distribution of Gypsum Crystals in Four Continuous Flow Stirred Slurry Reactors in Series”, VDI-Berichte 1901.1, art. no. B-32, pp. 465-471, VDI Verlag GmbH, Düsseldorf 2005, Proceedings of the16th International Symposium on Industrial Crystallization, 11-14 September 2005, International Congress Center, Dresden, Germany

6.    G. Çakal, F. Soylu, M.E. Çelen, S. Şener, S. Taban, S.B. Shukla, “Development of New Boron Micronutrient and Determination of Product  Applications”, Advances in Plant and Animal Nutrition, Springer, The Netherlands, 2007, pp. 183-187, Proceedings of the 3rd International Symposium on All Aspects of Plant and Animal Nutrition, 10-13 September 2005, Huazhong Agricultural University, Wuhan, China

7.    D. Gürhan, İ. Eroğlu, G.Ö. Çakal, S. Özkar, “Kinetics of Zinc Borate Production Reaction from Zinc Oxide and Boric Acid”, pp. 231-236, Proceedings of the III. International Boron Symposium, 2-4 November 2006, Ankara, Turkey

8.    Ö. Dervişoğlu, I. Aşar, İ. Eroğlu, C. Özgen, G.Ö. Çakal, “Inferencial Control of Boric Acid Production System”, pp. 245-252, Proceedings of the III. International Boron Symposium, 2-4 November 2006, Ankara, Turkey

9.    M. Kılınç, S. Yeşil, G. Çakal, G. Bayram, S. Özkar, and I. Eroğlu, “Production and Characterization of Hydrated Zinc Borate”, Somer Symposium Series I, page:51, 14-15 May 2007, Ankara, Turkey (poster presentation)

10.  A.G.Çelik, Çakal G.Ö., Nas. C., Saka M., “Bleaching of Mechanical Pulp with Sodium Perborate”, 19th Industrial Minerals International Congress & Exhibition, IM19, 30 March – 2 April 2008, Hilton Hotel, Athens, Greece (poster presentation)

(http://www.metalbulletin.com/Events/Details/Element.aspx?eventId=558&typeId=3)

11.  M. Kılınç, G. Bayram, A. Yılmaz, G. Çakal, I. Eroğlu and S. Özkar,  “Characterization of Flame Retardancy and Effect of Synergism on PET Based Composites via Phosphate Based Flame Retardant Additives”, Proceedings of the Polymer Processing Society 24th Annual Meeting, PPS-24, June 15-19, 2008 Salerno, Italy

12.  B. Baltacı, G. Ö. Çakal, G. Bayram, İ.Eroğlu, S. Özkar, “Effect of Using Polymeric Additive on the Synthesis of Zinc Borate”, pp. 160, 6th Chemical Engineering Conference for Collaborative Research in Eastern Mediterranean Countries, EMCC-6, Atlantis Hotel, Belek, ANTALYA, TURKEY, March 7-12, 2010 (poster presentation)

13.  G.S. Çağlar, G.Ö. Çakal, E. Yüce, R. Pabuccu, “Evaluation of Serum Boron Levels and Lipid Profiles in Pregnancy with or without Gestational Diabetes”, ISTERH International Society For Trace Elements Research in Humans, Trace Elements in Health and Disease:  Essentiality, Toxicity, Rixos Premium Hotel, Belek, Antalya, Turkey, October 16-21, 2011

14.  S.D Cengiz, G. Çağlar, G. Çakal, “Maternal and Umbilical Cord Blood Boron Levels in Term Gestations” The 14th World Congress on Controversies in Obstetrics, Gynecology & Infertility, All About Women’s Health, Paris, France, November 17-20, 2011 (poster presentation)

15.  A.G.Çelik, Çakal G.Ö., A.M. Kılıç, “Effect of Temperature on the Thermal and Physical Properties of Espey Colemanite”, 8th International Industrial Minerals Symposium, İstanbul, Turkey, November 29-30, 2012.

16.  N. Özmeriç, C. Gökmenoğlu, N. Dökmetaş, G. Çakal, C. Ergene, B. Kaftanoğlu, “Boron Nitride Coating on Titanium Dental Implants”, American Academy of Periodontology, 99th Annual Meeting, Philadelphia, Amerika, Ekim 2013

17.  G. Ö. Çakal, R. Güven, H. Yücel, “An Application of LSC Method for the Measurement of Gross Alpha and Beta Activities in Spiked Water and Drinking Water Samples”, NUTECH-2014, International Conference on Development and Applications of Nuclear Technologies, Warsaw, Poland, September 21-24, 2014.

18.  C. Gökmenoğlu, N. Özmeriç Kurtuluş, G. Ö. Çakal, N. Dökmetaş, C. Ergene, B. Kaftanoğlu, “Coating of Titanium Implants with Boron Nitride by RF-Magnetron Sputtering”, EuroPerio8, European Federation of Periodontology, Londra, June 3-6, 2015.

19.  G. Ö. Çakal, S. Limon, R. Güven, H. Yücel, “Measurement of 210Pb and 210Po Activity Concentrations in Certified Lagoon Sediment and Moss Soil By Using LSC and Alpha Particle Spectrometry”, 3rd International Conference on Po and Radioactive Pb Isotopes, INCO-PoPb-2015, Kuşadası, Turkey, October 11-14, 2015.

20.  R. Güven, G. Ö. Çakal, H. Yücel, “Measurement of gross alpha and beta activities in drinking water in ankara by using low level liquid scintillation and gas proportional counting methods”, Theoretical and Experimental Studies in Nuclear Applications and Technology, TESNAT 2016, Hatay, Turkey, April 28-30,2016.

21.  G.Ö. Çakal, R. Güven, H. Yücel, ”An application of lsc technique to determine 90Sr/90Y radionuclides in dry tea samples”, 3rd International Conference on Theoretical and Experimental Studies in Nuclear Applications and Technology, TESNAT 2017, Adana, Turkey, 10-12 May 2017.

22.  H. Yücel, G.Ö. Çakal, R. Güven, S. Limon, “Determination of optimum parameters for 241Am alpha source preparation by electrodeposition method”, NUTECH-2017 International Conference on Developments and Applications of Nuclear Technologies, Krakow, Poland, 10-13 September 2017.

23.  N. Ozmeric, C. Gokmenoglu, G. Cakal, A. Ozmeric, B. Oduncuoglu, B. Kaftanoglu, “Effect of Boron Nitride-Coating on the Osseointegration of Titanium Dental Implants: A Rabbit Model”, 28th Annual Scientific Meeting of the European Association for Osseointegration, EAO 2019, Lisbon, Portugal, 26-28 September 2019.

24.  N. Meriç, M. Başdoğan, G. Çakal, E. Aşlar, E. Şahiner, G.S. Polymeris, “Gamma dose rate effects in luminescence signals of various dosimetric phosphors”, 19th International Conference on Solid State Dosimetry (SSD19), Hiroshima City, Japan, 15-20 September 2019.


 NATIONAL CONFERENCE PAPERS

 

1.    G.Ö. Yücel, G.A. Gürüz, H. Yücel, “Termogravimetric Analiz Yöntemi ile Türk Kömürlerinin Karbonizasyon ve CO2 Aktivasyonu Sonucu Reaksiyona Girme Hızlarının Belirlenmesi”, III. National Chemical Engineering Congress, Atatürk University, Erzurum, pp. 545-550, 1-4 September 1998.

2.    A. Erdoğdu, G.Ö., Çakal, S.Özkar, İ. Eroğlu, “Investigation of the Dissolution Kinetics of Colemanite Mineral in Sulphuric Acid” RM-44, 6. National Chemical Engineering Congress, Ege University, Bornova, İzmir, 2004

3.    G.Ö., Çakal, S.Özkar, İ. Eroğlu, “Effect of Colemanite-Sulphuric Acid Feed Ratio on the Product Purity in Continuous Flow Stirred Boric Acid Reactors”, RM-43, 6. National Chemical Engineering Congress, Ege University, Bornova, İzmir, 2004

4.    D. Gürhan, G.Ö. Çakal, İ. Eroğlu, S. Özkar, “Investigation of the Parameters Effecting Zinc Borate Production in a Batch Reactor”, I. National Boron Workshop, Ankara, pp. 223-230,  28-29 April 2005

5.    Ö. Dervişoğlu, I. Aşar, G. Çakal, İ. Eroğlu, C. Özgen, “Inferencial Control of Boric Acid Production System”,  8. National Chemical Engineering Congress, Malatya, 2008

6.    A.G. Çelik, M.Saka, M.E.Çelen, G.Ö. Çakal, “Bleaching of Fresh Paper Pulp in the Mill with Sodium Perborate Monohydrate”, II. National Boron Workshop, Ankara, pp. 125-131, 17-18 April 2008

7.    M. Kılınç,  S. Yeşil, G. Çakal, G. Bayram, İ. Eroğlu, S. Özkar, “Pilot Plant Production and Characterization of 3.5 Mol Hydrated Zinc Borate”, II. National Boron Workshop, Ankara, 17-18 April 2008

8.    M. Kılınç, G. Bayram, A. Yılmaz, G.Ö. Çakal, İ. Eroğlu, S. Özkar, “Synergistic Effects of Phosphate and Boron Based Flame Retardants on the Poly(etylene terephytalate) (PET) Based Composites and Determination of the Flame Behavior and Mechanic Properties of Composites”, 3. National Polymer Science and Technology Congress and Fair, Polymer Science and Technology Society, Kocaeli University, pp. 46, May 2010.

9.    B. Baltacı, G.Ö. Çakal, G. Bayram, İ. Eroğlu, S. Özkar, “Effect of Surfactant Type on the Zinc Borate Synthesis” 9. National Chemical Engineering Congress, 2010, Gazi University, June 2010.

 

 PATENTS

 

1.    M. Kılınç, G. Bayram, G. Çakal, A. Yılmaz, İ. Eroğlu, S. Özkar, “Pet Based Composite Construction Material and Its Production Process”, TR 2008 04252 B

2.    G. Çakal, F. Soylu, M.E. Çelen, “Sodium Pentaborate and its Production Process” TR 2006 04991 B

3.    D. Gürhan, G.Ö. Çakal, İ. Eroğlu, S. Özkar, “ 3.5 Mole Hydrated Zinc Borate Production” TR 2006 02072 B

4.    N. Özmeriç Kurtuluş, G.Ö. Çakal, C. Gökmenoğlu, B. Kaftanoğlu, “Boron Nitride Coating Method in Implants and A Boron Nitride Coated Implant Material Produced with This Method”, TR Patent (under review)

 

PROJECTS

 

1.    Project No: AFP 96-03-04-02, METU, Investigator

Determination of the Reactivities of Coals as a Result of Carbonization and Activation by Thermogravimetric Analysis Process

 

2.    Project No: BAP- 2001-07-02-02, METU, Investigator

Production of Boric Acid in Continuous Flow Stirred Slurry Reactors

 

3.    Project No: BOREN -2005-E0022, Principal Investigator

Enhancement of Zinc Borate Production Technology and Investigation of Its Use as a Flame Retardant

Budget: 160,500 TL - Duration: 24 months (07/2005 – 10/2007)

 

4.    Project No: BOREN-2005- B0116, Principal Investigator

Pilot Plant Production of Specialty Boron Products Used as a Micronutrient in Agriculture and as Flame Retardant and Insecticide in Wood Applications

Budget: 314,756 TL - Duration: 24 months (11/2004 – 06/2008)

     

5.    Project No: BOREN-2007-B0188, Investigator

Use of Boron Doped Cement in Concrete Road Construction

Budget: 1,500,000 TL - Duration: 36 months (09/2007 – 04/2010)

 

6.    Project No: BOREN -2008 - Ç0179, Supervisor

Production of Small Particle Sized Zinc Borate and Its Use as a Flame Retardant

Budget: 72,000 TL - Duration: 27 months (01/2008 – 02/2011)

 

7.    Project No: BOREN-2008- B0201, Investigator

Project Preparation and Concept Development: Inorganic Borates, Flame Retardancy of Textile Products

Budget: 100,000 TL - Duration: 24 months (03/2008 – 08/2010)

 

8.    Project No: BOREN- 2011-B0313, Principal Investigator

Technology Planning and Roadmap of Boron Products and Technologies

Budget: 79,591 TL - Duration: 13 months (01/2011 – 02/2012)

 

9.    Project No: SBAG – 111S111, TÜBİTAK, Investigator

Surface Properties of Boron Nitride Coated Titanium Implants 

Budget: 147,050 TL - Duration: 24 months (11/2011 – 11/2013)

 

10. Project No: 12A4045002, Principal Investigator

The Enhancement of Measurement Capacity of Low Level Radioactivity by Liquid Scintillation Counting System in the Laboratories of Institute of Nuclear Sciences

Budget: 300,000 TL - Duration: 18 months (06/2012 – 12/2013)

 

11. Project No: SBAG – 114S391, TÜBİTAK, Investigator

Biomechanical and Histomorphometric Evaluation of Boron Nitrite Coated Titanium Implants

Budget: 252,590 TL - Duration: 24 months (12/2014 – 06/2017)

 

12. Project No: SBAG – 146012, TÜBİTAK, Investigator

Development of a Tissue Equivalent Phantom Used for Quality Control Tests of Mammography Systems and Its Characterization by Using X-ray Spectroscopy

Budget: 587,163 TL - Duration: 24 months (10/2015-10/2017)

 

13. Project No: BAP-16916, Hacettepe University, Investigator (in progress)

Investigation of Antibacterial Activity of Boron Nitride Coated Implants in Osteomyelitis Model

Budget: 30,000 TL – Duration: 12 months (03/2018-03/2020)