Ali Gürol - Academia.edu (original) (raw)

Papers by Ali Gürol

F-4 Effect of X-ray Tube Power On Intensities of Kα X-Rays of Trace Elements from Samples Obtained by Using Different Sample Preparation Methods in WDXRF Spectrometer

Powder Diffraction, 2007

The Effect of Magnetization on X- Ray Fluorescence Cross Sections

In this study, Fe and Co tablet samples, which show ferromagnetic properties at room temperature,... more In this study, Fe and Co tablet samples, which show ferromagnetic properties at room temperature, were magnetised for 300 seconds in a 1T (10 kG) of size magnetic field, which had 12.94 mm distance between its poles. The magnetic field applied on the ferromagnetic samples were measured as F. W. Bell Gauss/Teslameter (Model 5080) and 1 tesla (10 kG) when the distance between its poles were 12.94 mm. Then, the change emerged in the σ Kα and σ Kβ cross sections of Fe and Co were respectively measured as 20o, 40o, 60o, 80o, 100o, 120o and 140o release angles in order. The samples were alerted with KX-rays of silver alerted from Cd-109 radioisotope source of 40 mCi. During the study, an HPGe detector, which has the beryllium window with 25µm diameter and with (FWHM) 210 eV full width at half maximum in 5.9 keV was used. The crystal thickness of this detector was 10 mm and its active field was 200 mm2 , the voltage to be used on the detector was applied till -1500 V at maximum and the sha...

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2016

The overall study objective was to develop baseline information on the heavy elements concentrati... more The overall study objective was to develop baseline information on the heavy elements concentration in edible insect Sitophilus zeamais (Coleoptera: Curculionidae) and to evaluate the contamination levels of this insect. Twelve heavy elements (V, Mn, Fe, Cu, Zn, Br, Sn, Sb, I, La, Ce, Pb) were analyzed by using an Energy Dispersive X-ray Fluorescence (EDXRF). The element concentration showed trend of Cu>Zn>Sn>Sb>Mn>Fe>I=La>Ce>Br>V>Pb. Cu and Zn were maximally accumulated metals in Sitophilus zeamais, whereas Pb had the lowest level.

In this study, it has been measured the Compton Profile of the Nitrogen gas at different pressure... more In this study, it has been measured the Compton Profile of the Nitrogen gas at different pressures by using a Compton Profile Spectrometer with an annular Am-241 radioactive source, which emits 59.537 keV photons. The inelastic scattered -rays from gas molecules in a gas chamber have been measured using a HPGe detector connected to the a Tennelec 244 Amplifier and MAESTRO MCA Software. The gas pressure had been set by using a manometer before the measurements. The data have been corrected for all environmental scattering effects, i.e. scattering from gas chamber’s walls, collimators, and etc. Then, the Compton Profile of Nitrogen gases at five different pressures have been determined using a Matlab Code. We found that the Compton Profiles changes with increasing pressures.

Two new edible insect species from Ghana and their chemical content evaluation

International Journal of Tropical Insect Science

The present study was aimed to determine the concentration of elements in two edible insect speci... more The present study was aimed to determine the concentration of elements in two edible insect species Microcerotermes parvulus (Sjostedt, 1911) and Pheidole megacephala (Fabricius 1793) from Ghana. Elements (Mn, Fe, Cu, Zn, Se, Br, Sr, Zr, Nb, Mo, Sn, Sb, I, Ba, La, Ce, Pb) were analyzed by using Energy Dispersive X-ray Fluorescence (EDXRF). Differences in the element accumulation were observed between the two insects. More specifically, 16 elements (Mn, Fe, Cu, Zn, Se, Br, Sr, Zr, Nb, Sn, Sb, I, Ba, La, Ce, Pb) were determined in M. parvulus and 14 elements (Mn, Fe, Cu, Zn, Se, Sr, Zr, Nb, Mo, Sn, Sb, I, La, Pb) in P. megacephala. With this study, these insects were recorded for the first time for the world edible insect literature. In addition, based on the peer-reviewed published literature, the world map of the entomophagous countries was revised.

Journal of the Institute of Science and Technology

This study was performed to determine the amount of some elements concentration in bodies of the ... more This study was performed to determine the amount of some elements concentration in bodies of the aquatic insects. The contaminants, in six different polluted and non-polluted cities of Turkey, were determined with using predaceous diving beetles. Energy Dispersive X-Ray Fluorescence (EDXRF) spectroscopy was used for determining the concentrations of heavy metals/metalloids in the total body of the insects. Sixteen elements (Ca,

Efficient removal of iodine-131 from radioactive waste by nanomaterials

Instrumentation Science & Technology

Abstract Radioactive solutions containing graphene, graphene oxide, single-walled carbon nanotube... more Abstract Radioactive solutions containing graphene, graphene oxide, single-walled carbon nanotube and -COOH functionalized single-walled carbon nanotubes were prepared. Iodine-131 was used as the radioactive material. A high purity germanium detector with a resolution of 490 eV at 122 keV was used to measure the photon intensities emitted from the iodine-131 solutions by gamma ray spectroscopy. The intensities of the gamma radiation emitted from the radioactive solutions, the filtered solutions, and filter system were measured. The removal percentage and adsorption capacity of the investigated nanomaterials were determined. The results showed that the single-walled carbon nanotubes are superior absorbers than graphene, graphene oxide and -COOH functionalized single-walled carbon nanotubes for iodine-131.

59.54 keV’lik Gama-ışınları Kullanılarak Ar ve O2’nin Compton Saçılma Ölçümleri

Türk Doğa ve Fen Dergisi

Bu calismada, dairesel 241Am radyoaktif kaynaga sahip bir Compton spektrometresi kullanilarak Ar ... more Bu calismada, dairesel 241Am radyoaktif kaynaga sahip bir Compton spektrometresi kullanilarak Ar ve O2 gazlarinin Compton profilleri arastirilmistir. Radyoaktif kaynaktan yayinlanan fotonlar ve numunelerden sacilan fotonlar HPGe detektoru kullanilarak kaydedildi. Numunelerin deneysel Compton profillerini elde etmek icin Warwick kodlari kullanildi. Elde edilen deneysel sonuclar Hartree-Fock yontemi ile hesaplanan teorik sonuclarla karsilastirildi. Sonuclar, ozellikle yuksek momentum bolgesinde deneysel ve teorik sonuclarin uyumlu oldugunu acikca gostermektedir. pz = 0 bolgesindeki Ar ve O2 gazlarinin deneysel ve teorik sonuclari arasindaki fark yaklasik % 4 iken pz = 2'den sonra bu farkin % 1'in altinda oldugu gorulmustur.

Investigation of gamma ray attenuation features of bismuth oxide nano powder reinforced high-density polyethylene matrix composites

Radiation Physics and Chemistry

Effect of heat treatment temperature to the crystal growth and optical performance of Mn3O4 doped α-Zn2SiO4 based glass-ceramics

Results in Physics

Abstract In this work, manganese (II, III) oxide, (Mn3O4) doped zinc soda lime silica glasses hav... more Abstract In this work, manganese (II, III) oxide, (Mn3O4) doped zinc soda lime silica glasses have been synthesized using a conventional melt-quenching process and followed by control heat treatment process. The crystal phase composition and optical properties of α-Zn2SiO4:Mn3O4 based glass-ceramics are comprehensively studied. The physical properties and crystal growth of α-Zn2SiO4 phase were measured by density analysis, linear shrinkage, X-ray diffraction (XRD) and Fourier transform infrared reflection (FTIR) spectroscopy. From the measurement, the average density and linear shrinkage of α-Zn2SiO4:Mn3O4 based glass-ceramics increased with increasing heat treatment temperature. Besides, the presence of Zn–O–Si bands indicates the formation of α-Zn2SiO4 crystal phase and causing the decrement of energy band gap. The photoluminescence spectra of Mn2+ ions exhibit emission transitions of 4T1(G)–6A1(S) and show a prominent green emission colors of α-Zn2SiO4 phase at 524 nm.

Erzurum İlindeki Farklı Hydrophilidae (Coleoptera) Türlerini Kullanarak Ağır Element Kirliliğinin Değerlendirilmesi

Anadolu Ege Tarımsal Araştırma Enstitüsü Dergisi

Gamma and neutron radiation effect on Compton profile of the multi-walled carbon nanotubes

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

Abstract In this study it has been investigated the effect of gamma and neutron radiation on the ... more Abstract In this study it has been investigated the effect of gamma and neutron radiation on the electron momentum distribution (Compton profile) of the Multiwall Carbon Nanotube (MWCNT) using a Compton spectrometer with an annular 241Am radioactive source. The samples were irradiated with 10 kGy (kGy) gamma rays, thermal and fast neutrons. The photons emitted from the 241Am source were incident on the irradiated samples and the scattered photons from the samples were recorded using HPGe detector. Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) results are also given to show the changes at the atomic structure of the MWCNT. The results clearly show that the Compton profile of multi-walled carbon nanotubes has changed with gamma and neutron irradiation. These changes are attributed to the delocalization of the electrons in the sample (in real space) which is clearly seen in the increased height of Compton profile of MWCNT at low momentum range (localization in momentum space) during sample’s irradiation.

Heavy metal accumulation in some aquatic insects (Coleoptera: Hydrophilidae) and tissues of Chondrostoma regium (Heckel, 1843) relevant to their concentration in water and sediments from Karasu River, Erzurum, Turkey

Environmental science and pollution research international, Jan 28, 2017

The objectives of this research were to determine and compare the heavy element concentrations in... more The objectives of this research were to determine and compare the heavy element concentrations in two study areas in Erzurum, Turkey (Aşkale and Dumlu sites). Assessment of some heavy elements in sediment, water, fish (Chondrostoma regium) tissues, and some aquatic insects (Coleoptera: Hydrophilidae) were carried out in June to August 2014. Heavy element levels in aquatic insect samples and their associated water and sediment were analyzed by energy dispersive X-ray fluorescence (EDXRF) spectrometer. Fish tissues, from the same habitat, were measured by inductively coupled plasma mass spectrometry (ICP-MS). Eleven elements (Al, Cr, Mn, Fe, Ni, Cu, Zn, As, Cd, Hg, Pb) were measured in fish tissues, and 14 elements (Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Br, Pb) were measured in insects. According to the results, it can be said that insects were contaminated by water and sediment, thus accumulated higher concentration of some elements than their environment. The fish, which wa...

X-ray fluorescence analysis of archaeological artefacts From Bozcaada (Tenedos), Turkey

Post-Medieval Archaeology, 2016

The investigation of heavy element accumulation in some Hydrophilidae (Coleoptera) species

Environmental Monitoring and Assessment, 2016

First of all, this study aimed to find out the measures of some heavy elements (Ti, V, Cr, Mn, Fe... more First of all, this study aimed to find out the measures of some heavy elements (Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Br, Sr, Pb) as heavy element pollution in Erzurum Province, and secondly to observe whether some hydrophilidae (Coleoptera) species can be used as a biomonitor. Insect samples were collected from five different localities of Erzurum in June, July, and August 2014. Heavy element levels in sediment, water, and insect samples were analyzed by energy-dispersive X-ray fluorescence (EDXRF) spectrometer device. According to the results of analysis derived through EDXRF spectrometry, heavy element concentrations display differences between stations and also species. The results pointed out that the insects were contaminated by the sediment and water; therefore, some hydrophilidae species accumulate higher concentration of elements than their environment. Results for levels in water were compared to national water quality guidelines. The values of some heavy elements found at higher concentration than acceptable limits.

in situ Determination of Radioisotopes in Certain Spring Waters and Spring Mud in Erzurum, Turkey

Asian Journal of Chemistry, 2016

Effective atomic numbers for (PbO and Na 2 B 4 O 7 10H 2 O) and (UO 2 (NO 3) 2 , and Na 2 B 4 O 7... more Effective atomic numbers for (PbO and Na 2 B 4 O 7 10H 2 O) and (UO 2 (NO 3) 2 , and Na 2 B 4 O 7 10H 2 O) mixtures against changing contents of PbO, Na 2 B 4 O 7 10H 2 O, and UO 2 (NO 3) 2 were measured in the X-ray energy range from 25.0 to 58.0 keV. The gamma rays emitted by a 241 Am annular source have been sent on the absorbers which emits their characteristic X-rays to be used in transmission arrangement. The X-rays were counted by a Si(Li) detector with a resolution of 146 eV at 5.90 keV. The changing compositions of the compounds were assigned to be 0, 0.167, 0.333, 0.500, 0.666, 0.833 and total masses of the mixtures were adjusted to be identical. Also, the total effective atomic numbers of each mixture were estimated by using the mixture rule. The measured values were compared with estimated values for the mixtures.

Boron compounds that are used in the manufacturing of a variety of products are introduced to the... more Boron compounds that are used in the manufacturing of a variety of products are introduced to the environment in the form of waste. The radiation shielding measurements of mixtures that contain boron compounds is considered to be a topic of concern. The mass attenuation coefficients of (PbO and K 2 B 4 O 7 Á4H 2 O) and (PbO and H 3 BO 3) as functions of their changing contents have been measured in the X-ray energy range from 25.191 to 57.903 keV. These values are used to determine the effective atomic number of mixtures. The c-rays emitted from an Am 241 annular source have been sent to secondary sources whose characteristic X-rays have been used for transmission arrangement. The characteristic X-rays of the secondary sources have been counted by a Si(Li) detector with a resolution of 149 eV at 5.9 keV. Also, the total effective atomic number of each mixture was determined by using the mixture rule. The measured values were compared with theoretically calculated values.

Studies on mass attenuation coefficient, effective atomic number and electron density of some thermoluminescent dosimetric compounds

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2012

ABSTRACT Mass attenuation coefficient, μm , effective atomic number, Zeff, and effective electron... more ABSTRACT Mass attenuation coefficient, μm , effective atomic number, Zeff, and effective electron density, Nel, were determined experimentally and theoretically for some thermoluminescent dosimetric (TLD) compounds such as MgSO4, CdSO4, Al2O3, Mg2SiO4, ZnSO4, CaSO4, CaF2, NaSO4, Na4P2O7, Ca5F(PO4)3, SiO2, CaCO3 and BaSO4 at 8.04, 8.91, 13.37, 14.97, 17.44, 19.63, 22.10, 24.90, 30.82, 32.06, 35.40, 36.39, 37.26, 43.74, 44.48, 50.38, 51.70, 53.16, 80.99, 276.40, 302.85, 356.01, 383.85 and 661.66 keV photon energies by using an HPGe detector with a resolution of 182 eV at 5.9 keV. The theoretical mass attenuation coefficients were estimated using mixture rule. The calculated values were compared with the experimental values for all compounds. Good agreement has been observed between experimental and theoretical values within experimental uncertainties.

L-subshell and total L-shell photoeffect cross-sections measurements for Pb, Au, W, and Ta at

Radiation Physics and Chemistry, 2003

... Lα , σ Lγ 1 , and σ Lγ 2,3,6,8 XRF cross-sections determined experimentally and theoretically... more ... Lα , σ Lγ 1 , and σ Lγ 2,3,6,8 XRF cross-sections determined experimentally and theoretically are listed in Table 1. In addition, the values of σ Lα XRF cross-sections are compared with other available experimental values (Do Image an et al., 1997; Özdemir and Durak, 2000) in ...