a araz - Academia.edu (original) (raw)
Papers by a araz
Fresenius Environmental Bulletin, 2016
WOS: 000391345600067The Fusarium species that is the cause of the disease that we used in our stu... more WOS: 000391345600067The Fusarium species that is the cause of the disease that we used in our study takes an important place among microfungi that cause disease in agricultural plant species and economic loss. The subgroups and races of this species especially cause diseases with various symptoms on cereals such as wheat, barley, corn and clover, on fruit trees, and garden and ornamental plants. The definition of these microfungi that are pathogens at the genetic material level is important in terms of determining the disease they cause. The aim of the present study was to determine the genetic relationship among twenty isolates of Fusarium spp. (18 Fusarium species) isolated from wheat, maize and clover in Turkey using RAPD technique. In the present study, Random Amplified Polymorphic DNA (RAPD) markers were used to assess the genetic diversity within 20 isolates of Fusarium. RAPD analysis was performed with 16 decamer primers selected from a total of 30 primers. A total of 408 reproducible fragments were amplified by 16 RAPD primers. All the fragments were polymorphic (100%). The size of these fragments ranged from 100 to 3000 bp. The number of bands per primer varied between 14 and 39. Similaritiy indexes were calculated to determine the genetic relationships among these populations and subsequently dendograms based on Unweighted Pair-Group Method using Arithmetic Averages (UPGMA) was derived. Based on DNA finger prints, all isolates of Fusarium were categorized into three major clusters. The results demonstrated that RAPD analysis can be used for assessing the genetic diversity and the relationships among the Fusarium species.Kirikkale University Scientific Research Projects (SRP) Coordination UnitKirikkale University [BAP-2008/26]This financial support by Kirikkale University Scientific Research Projects (SRP) Coordination Unit via grant numbered BAP-2008/26 is acknowledged gratefully
The Superconducting Linear Accelerator S-DALINAC at the University of Darmstadt/ Germany is a rec... more The Superconducting Linear Accelerator S-DALINAC at the University of Darmstadt/ Germany is a recirculating Linac with two recirculations. Currently acceleration in the Linac is done on crest of the acceleration field using the maximum of the field in every turn. The recirculation of the beam is done isochronous without any longitudinal dispersion. In this recirculation scheme the energy spread of the resulting beam is determined by the stability of the used RF system. In this work we will present a new non-isochronous recirculation scheme, which uses longitudinal dispersion in the recirculations and an acceleration on edge of the accelerating field as it is done in microtrons. We will present beam dynamic calculations which show the usability of this system even in a Linac with only two recirculations and first measurements of longitudinal dispersion using RF monitors.
During the redesign of the low level RF system for the S-DALINAC, a baseband approach was chosen.... more During the redesign of the low level RF system for the S-DALINAC, a baseband approach was chosen. The RF signals from/ to the cavity are converted into the baseband via I/Q Modulators/ Demodulators. The advantage of this design was realized lateron, as adaption of other frequencies becomes rather easy. The system, originally designed for 3 GHz superconducting cavity in cw operation is currently modified to control a 324 MHz room temperature CH cavity in pulsed operation. We will report on the rf control system principle, the required modifications and first results.
Progress in Nuclear Energy, 2022
Turkiye'de tahillarda kok ve kok bogazi curuklugu hastaliklari, en buyuk ekonomik kayiplara n... more Turkiye'de tahillarda kok ve kok bogazi curuklugu hastaliklari, en buyuk ekonomik kayiplara neden olan fungal hastaliklardir. Bu calisma, 2007-2008 yillari arasinda Sakarya'da Tarimsal Arastirma Enstitusunde ve Kirazca Isletmesinde yetistirilen 18 bugday cesidinde ve Sakarya merkez ilceye bagli 4 bolgede de, kok ve kok bogazi hastaliklarinin belirlenmesine yonelik yapilmistir. Hastalikli ornekler, Sakarya Tarimsal Arastirma Enstitusunun deneme parsellerinden ve Hanli, Esence, Esenler, Kirazca koylerinden alinmistir. Toplam 44 bugday kok ornegi toplanarak, bu ornekler PDA (Patates Dekstroz Agar) ve SNA (Synthetic Nutrient Agar) kullanilarak izolasyonlari yapilmistir. Inkubasyon suresinin sonunda bugday koklerinden gelisen funguslar cins ve tur duzeyinde belirlenmistir. Toplanan orneklerden Fusarium graminearum, F. culmorum, F. subglutinans, F. crookwellense, F. oxysporum, F. moniliforme, F. dimerum, F. solani, F. equiseti, F. acuminatum, F. sporotrichoides, Rhizoctonia spp. v...
TURKISH JOURNAL OF CHEMISTRY, 2021
Molecular imprinted polymers (MIP) have key-lock pattern binding properties specific to the size ... more Molecular imprinted polymers (MIP) have key-lock pattern binding properties specific to the size and shape of target molecules. In this study, we have prepared detection platforms based on a molecularly imprinted surface plasmon resonance (SPR) sensor that can detect bovine serum albumin (BSA) sensitively, selectively, quickly and in real time. The polymeric film prepared on the SPR sensor surface by molecular imprinting method were obtained with selecting the Nmethacryloyl-(L)-glutamic acid molecule as a suitable functional monomer using ultraviolet polymerization. Three different imprinting methods, epitope, bulk and surface imprinting methods were used to examine the imprinting efficiency. Real-time 2 measurements were performed with BSA imprinted SPR sensor provide linearity in the concentration range of 0.10 to 7.50 nM and indicate a detection limit value of 0.015 nM. Furthermore, we performed the selectivity experiments, where transferrin and hemoglobin were chosen as competitor agents. Overall, the SPR sensor prepared by the epitope imprinting approach have been found to be highly selective and sensitive for bovine serum albumin. To statistically assess the reusability of the sensor, intraday experiments were tested three times with five replicates. The RSD% value less than <1.3 indicates high reproducibility for both sensor production and reproducibility of the method. Validation studies were carried out via enzyme-linked immunosorbent analysis technique (ELISA) in order to demonstrate the applicability of BSA imprinted SPR sensor. Due to their features such as reusability, fast response time and ease of use, these SPR sensors, which could be used as an alternative to albumin monitoring approaches, can also be adapted to detect and monitor other proteins in real time.
Journal of Physics: Conference Series, 2016
In this work, the mass attenuation coefficients, molecular, atomic and electronic cross sections,... more In this work, the mass attenuation coefficients, molecular, atomic and electronic cross sections, effective atomic numbers and electron densities of some selected indium complexes such as C 5 H 10 InNO 9 , C 3 H 6 InNO 9 and C 9 H 10 InNO 9 , were determined with experimentally and theoretically using transmission geometry at 59.54 keV photon energy which emitted from 241 Am annular source. The results were compared with the theoretical calculations which obtained from the WinXCOM program. Also, the results were interpreted based on some chemical parameters such as energy gap, ionization energy, electron affinity, hardness, chemical potential, electronegativity and global electrophilicity values of malonate, 2,2 dimethylmalonate and phenylmalonate which were calculated using the density functional theory (DFT/B3LYP).
Applied Radiation and Isotopes, 2016
The paper presents the first measurements of the Kα and Kβ excitation factors for some selected e... more The paper presents the first measurements of the Kα and Kβ excitation factors for some selected elements from Y to Te. To determine the Kα and Kβ excitation factors, the experimental values of K shell X-ray production cross sections and total absorption photoelectric cross sections were used. The measurements were performed using a Si(Li) detector coupled with 2048 multichannel analyzer and an Am-241 annular radioisotope source which is emitted 59.54 keV γ-photons. It is observed that the Kα excitation factors are 5-6 times larger than the Kβ excitation factors. The measured excitation factors were compared only with theoretical calculated ones since there are no other experimental reports for the present elements in the literature. The present experimental values of Kα and Kβ excitation factors are in satisfactory agreement with the theoretical results.
Physical Review Special Topics - Accelerators and Beams, 2010
The low level rf system for the superconducting Darmstadt electron linear accelerator (S-DALINAC)... more The low level rf system for the superconducting Darmstadt electron linear accelerator (S-DALINAC) developed 20 years ago and operating since converts the 3 GHz signals from the cavities down to the baseband and not to an intermediate frequency. While designing the new, digital rf control system this concept was kept: the rf module does the I=Q and amplitude modulation/demodulation while the low frequency board, housing an field programmable gate array analyzes and processes the signals. Recently, the flexibility of this concept was realized: By replacing the modulator/demodulators on the rf module, cavities operating at frequencies other than the one of the S-DALINAC can be controlled with only minor modifications: A 6 GHz version, needed for a harmonic bunching system at the S-DALINAC and a 324 MHz solution to be used on a room temperature cavity at GSI, are currently under design. This paper reviews the concept of the digital low level rf control loops in detail and reports on the results gained during first operation with a superconducting cavity.
SPE Reservoir Characterisation and Simulation Conference and Exhibition, 2015
A new generation improved oil recovery methods comes from combining techniques to make the overal... more A new generation improved oil recovery methods comes from combining techniques to make the overall process of oil recovery more efficient. One of the most promising methods is combined Low Salinity Surfactant (LSS) flooding. Low salinity brine injection has proven by numerous laboratory core flood experiments to give a moderate increase in oil recovery. Current research shows that this method may be further enhanced by introduction of surfactants optimized for lowsal environment by reducing the interfacial tension. Researchers have suggested different mechanisms in the literature such as pH variation, fines migration, multicomponent ionic exchange, interfacial tension reduction and wettability alteration for improved oil recovery during lowsal injection. In this study, surfactant solubility in lowsal brine was examined by bottle test experiments. A series of core displacement experiments was conducted on nine crude oil aged Berea core plugs that were designed to determine the impact of brine composition, wettability alteration, Low Salinity Water (LSW) and LSS flooding on Enhancing Oil Recovery (EOR). Laboratory core flooding experiments were conducted on the samples in a heating cabinet at 60°C using five different brine compositions with different concentrations of NaCl, CaCl 2 and MgCl 2. The samples were first reached to initial water saturation, S wi , by injecting connate water (high salinity water). LSW injection followed by LSS flooding performed on the samples to obtain the irreducible oil saturation. The results showed a significant potential of oil recovery with maximum additional recovery of 7% Original Oil in Place (OOIP) by injection of LS water (10% LS brine and 90% distilled water) into water-wet cores compared to high salinity waterflooding. It is also concluded that oil recovery increases as wettability changes from water-wet to neutral-wet regardless of the salinity compositions. A reduction in residual oil saturation, S or , by 1.1-4.8% occurred for various brine compositions after LSS flooding in tertiary recovery mode. The absence of clay swelling and fine migration has been confirmed by the stable differential pressure recorded for both LSW and LSS flooding. Aging the samples at high temperature prevented the problem of fines production. Combined LSS flooding resulted in an additional oil recovery of 9.2% OOIP when applied after LSW flooding. Surfactants improved the oil recovery by reducing the oil-water interfacial tension. In addition, lowsal environment decreased the surfactant retention, thus led to successful LSS flooding. The results showed that combined LSS flooding may be one of the most promising methods in EOR. This hybrid improved oil recovery method is economically more attractive and feasible compared to separate low salinity waterflooding or surfactant flooding.
Istanbul Tıp Fakültesi mecmuasi, 1958
Istanbul Tıp Fakültesi mecmuasi, 1958
Istanbul Tıp Fakültesi mecmuasi, 1957
Nature, 1959
THE results of in vivo studies show that nicotinamide has a ketogenic effect on alloxanized rats1... more THE results of in vivo studies show that nicotinamide has a ketogenic effect on alloxanized rats1,2. On the other hand, Villa and Dioguardi3 observed that nicotinamide considerably increases the oxygen consumption of liver homogenates of normal rats in a medium containing sodium acetoacetate, and they suggested that this effect is the result of stimulation of the keto-oxidative system. Recently, we observed4 that the rate of oxygen uptake of liver homogenates of alloxanized rats rises after the addition of ethyl acetoacetate; but the oxygen consumption is not relatively higher after the addition of nicotinamide.
Journal of Peace Education, 2013
Euphytica, 1985
Three hundred and nineteen Rhynchosporium swdi.s isolates from cultivated barley were divided int... more Three hundred and nineteen Rhynchosporium swdi.s isolates from cultivated barley were divided into five groups on the basis of their virulence on IS differential barley varieties. Pathogenic variation was also demonstrated for isolates from different scald lesions within the same crop and amongst different sports from the same lesions.
Fresenius Environmental Bulletin, 2016
WOS: 000391345600067The Fusarium species that is the cause of the disease that we used in our stu... more WOS: 000391345600067The Fusarium species that is the cause of the disease that we used in our study takes an important place among microfungi that cause disease in agricultural plant species and economic loss. The subgroups and races of this species especially cause diseases with various symptoms on cereals such as wheat, barley, corn and clover, on fruit trees, and garden and ornamental plants. The definition of these microfungi that are pathogens at the genetic material level is important in terms of determining the disease they cause. The aim of the present study was to determine the genetic relationship among twenty isolates of Fusarium spp. (18 Fusarium species) isolated from wheat, maize and clover in Turkey using RAPD technique. In the present study, Random Amplified Polymorphic DNA (RAPD) markers were used to assess the genetic diversity within 20 isolates of Fusarium. RAPD analysis was performed with 16 decamer primers selected from a total of 30 primers. A total of 408 reproducible fragments were amplified by 16 RAPD primers. All the fragments were polymorphic (100%). The size of these fragments ranged from 100 to 3000 bp. The number of bands per primer varied between 14 and 39. Similaritiy indexes were calculated to determine the genetic relationships among these populations and subsequently dendograms based on Unweighted Pair-Group Method using Arithmetic Averages (UPGMA) was derived. Based on DNA finger prints, all isolates of Fusarium were categorized into three major clusters. The results demonstrated that RAPD analysis can be used for assessing the genetic diversity and the relationships among the Fusarium species.Kirikkale University Scientific Research Projects (SRP) Coordination UnitKirikkale University [BAP-2008/26]This financial support by Kirikkale University Scientific Research Projects (SRP) Coordination Unit via grant numbered BAP-2008/26 is acknowledged gratefully
The Superconducting Linear Accelerator S-DALINAC at the University of Darmstadt/ Germany is a rec... more The Superconducting Linear Accelerator S-DALINAC at the University of Darmstadt/ Germany is a recirculating Linac with two recirculations. Currently acceleration in the Linac is done on crest of the acceleration field using the maximum of the field in every turn. The recirculation of the beam is done isochronous without any longitudinal dispersion. In this recirculation scheme the energy spread of the resulting beam is determined by the stability of the used RF system. In this work we will present a new non-isochronous recirculation scheme, which uses longitudinal dispersion in the recirculations and an acceleration on edge of the accelerating field as it is done in microtrons. We will present beam dynamic calculations which show the usability of this system even in a Linac with only two recirculations and first measurements of longitudinal dispersion using RF monitors.
During the redesign of the low level RF system for the S-DALINAC, a baseband approach was chosen.... more During the redesign of the low level RF system for the S-DALINAC, a baseband approach was chosen. The RF signals from/ to the cavity are converted into the baseband via I/Q Modulators/ Demodulators. The advantage of this design was realized lateron, as adaption of other frequencies becomes rather easy. The system, originally designed for 3 GHz superconducting cavity in cw operation is currently modified to control a 324 MHz room temperature CH cavity in pulsed operation. We will report on the rf control system principle, the required modifications and first results.
Progress in Nuclear Energy, 2022
Turkiye'de tahillarda kok ve kok bogazi curuklugu hastaliklari, en buyuk ekonomik kayiplara n... more Turkiye'de tahillarda kok ve kok bogazi curuklugu hastaliklari, en buyuk ekonomik kayiplara neden olan fungal hastaliklardir. Bu calisma, 2007-2008 yillari arasinda Sakarya'da Tarimsal Arastirma Enstitusunde ve Kirazca Isletmesinde yetistirilen 18 bugday cesidinde ve Sakarya merkez ilceye bagli 4 bolgede de, kok ve kok bogazi hastaliklarinin belirlenmesine yonelik yapilmistir. Hastalikli ornekler, Sakarya Tarimsal Arastirma Enstitusunun deneme parsellerinden ve Hanli, Esence, Esenler, Kirazca koylerinden alinmistir. Toplam 44 bugday kok ornegi toplanarak, bu ornekler PDA (Patates Dekstroz Agar) ve SNA (Synthetic Nutrient Agar) kullanilarak izolasyonlari yapilmistir. Inkubasyon suresinin sonunda bugday koklerinden gelisen funguslar cins ve tur duzeyinde belirlenmistir. Toplanan orneklerden Fusarium graminearum, F. culmorum, F. subglutinans, F. crookwellense, F. oxysporum, F. moniliforme, F. dimerum, F. solani, F. equiseti, F. acuminatum, F. sporotrichoides, Rhizoctonia spp. v...
TURKISH JOURNAL OF CHEMISTRY, 2021
Molecular imprinted polymers (MIP) have key-lock pattern binding properties specific to the size ... more Molecular imprinted polymers (MIP) have key-lock pattern binding properties specific to the size and shape of target molecules. In this study, we have prepared detection platforms based on a molecularly imprinted surface plasmon resonance (SPR) sensor that can detect bovine serum albumin (BSA) sensitively, selectively, quickly and in real time. The polymeric film prepared on the SPR sensor surface by molecular imprinting method were obtained with selecting the Nmethacryloyl-(L)-glutamic acid molecule as a suitable functional monomer using ultraviolet polymerization. Three different imprinting methods, epitope, bulk and surface imprinting methods were used to examine the imprinting efficiency. Real-time 2 measurements were performed with BSA imprinted SPR sensor provide linearity in the concentration range of 0.10 to 7.50 nM and indicate a detection limit value of 0.015 nM. Furthermore, we performed the selectivity experiments, where transferrin and hemoglobin were chosen as competitor agents. Overall, the SPR sensor prepared by the epitope imprinting approach have been found to be highly selective and sensitive for bovine serum albumin. To statistically assess the reusability of the sensor, intraday experiments were tested three times with five replicates. The RSD% value less than <1.3 indicates high reproducibility for both sensor production and reproducibility of the method. Validation studies were carried out via enzyme-linked immunosorbent analysis technique (ELISA) in order to demonstrate the applicability of BSA imprinted SPR sensor. Due to their features such as reusability, fast response time and ease of use, these SPR sensors, which could be used as an alternative to albumin monitoring approaches, can also be adapted to detect and monitor other proteins in real time.
Journal of Physics: Conference Series, 2016
In this work, the mass attenuation coefficients, molecular, atomic and electronic cross sections,... more In this work, the mass attenuation coefficients, molecular, atomic and electronic cross sections, effective atomic numbers and electron densities of some selected indium complexes such as C 5 H 10 InNO 9 , C 3 H 6 InNO 9 and C 9 H 10 InNO 9 , were determined with experimentally and theoretically using transmission geometry at 59.54 keV photon energy which emitted from 241 Am annular source. The results were compared with the theoretical calculations which obtained from the WinXCOM program. Also, the results were interpreted based on some chemical parameters such as energy gap, ionization energy, electron affinity, hardness, chemical potential, electronegativity and global electrophilicity values of malonate, 2,2 dimethylmalonate and phenylmalonate which were calculated using the density functional theory (DFT/B3LYP).
Applied Radiation and Isotopes, 2016
The paper presents the first measurements of the Kα and Kβ excitation factors for some selected e... more The paper presents the first measurements of the Kα and Kβ excitation factors for some selected elements from Y to Te. To determine the Kα and Kβ excitation factors, the experimental values of K shell X-ray production cross sections and total absorption photoelectric cross sections were used. The measurements were performed using a Si(Li) detector coupled with 2048 multichannel analyzer and an Am-241 annular radioisotope source which is emitted 59.54 keV γ-photons. It is observed that the Kα excitation factors are 5-6 times larger than the Kβ excitation factors. The measured excitation factors were compared only with theoretical calculated ones since there are no other experimental reports for the present elements in the literature. The present experimental values of Kα and Kβ excitation factors are in satisfactory agreement with the theoretical results.
Physical Review Special Topics - Accelerators and Beams, 2010
The low level rf system for the superconducting Darmstadt electron linear accelerator (S-DALINAC)... more The low level rf system for the superconducting Darmstadt electron linear accelerator (S-DALINAC) developed 20 years ago and operating since converts the 3 GHz signals from the cavities down to the baseband and not to an intermediate frequency. While designing the new, digital rf control system this concept was kept: the rf module does the I=Q and amplitude modulation/demodulation while the low frequency board, housing an field programmable gate array analyzes and processes the signals. Recently, the flexibility of this concept was realized: By replacing the modulator/demodulators on the rf module, cavities operating at frequencies other than the one of the S-DALINAC can be controlled with only minor modifications: A 6 GHz version, needed for a harmonic bunching system at the S-DALINAC and a 324 MHz solution to be used on a room temperature cavity at GSI, are currently under design. This paper reviews the concept of the digital low level rf control loops in detail and reports on the results gained during first operation with a superconducting cavity.
SPE Reservoir Characterisation and Simulation Conference and Exhibition, 2015
A new generation improved oil recovery methods comes from combining techniques to make the overal... more A new generation improved oil recovery methods comes from combining techniques to make the overall process of oil recovery more efficient. One of the most promising methods is combined Low Salinity Surfactant (LSS) flooding. Low salinity brine injection has proven by numerous laboratory core flood experiments to give a moderate increase in oil recovery. Current research shows that this method may be further enhanced by introduction of surfactants optimized for lowsal environment by reducing the interfacial tension. Researchers have suggested different mechanisms in the literature such as pH variation, fines migration, multicomponent ionic exchange, interfacial tension reduction and wettability alteration for improved oil recovery during lowsal injection. In this study, surfactant solubility in lowsal brine was examined by bottle test experiments. A series of core displacement experiments was conducted on nine crude oil aged Berea core plugs that were designed to determine the impact of brine composition, wettability alteration, Low Salinity Water (LSW) and LSS flooding on Enhancing Oil Recovery (EOR). Laboratory core flooding experiments were conducted on the samples in a heating cabinet at 60°C using five different brine compositions with different concentrations of NaCl, CaCl 2 and MgCl 2. The samples were first reached to initial water saturation, S wi , by injecting connate water (high salinity water). LSW injection followed by LSS flooding performed on the samples to obtain the irreducible oil saturation. The results showed a significant potential of oil recovery with maximum additional recovery of 7% Original Oil in Place (OOIP) by injection of LS water (10% LS brine and 90% distilled water) into water-wet cores compared to high salinity waterflooding. It is also concluded that oil recovery increases as wettability changes from water-wet to neutral-wet regardless of the salinity compositions. A reduction in residual oil saturation, S or , by 1.1-4.8% occurred for various brine compositions after LSS flooding in tertiary recovery mode. The absence of clay swelling and fine migration has been confirmed by the stable differential pressure recorded for both LSW and LSS flooding. Aging the samples at high temperature prevented the problem of fines production. Combined LSS flooding resulted in an additional oil recovery of 9.2% OOIP when applied after LSW flooding. Surfactants improved the oil recovery by reducing the oil-water interfacial tension. In addition, lowsal environment decreased the surfactant retention, thus led to successful LSS flooding. The results showed that combined LSS flooding may be one of the most promising methods in EOR. This hybrid improved oil recovery method is economically more attractive and feasible compared to separate low salinity waterflooding or surfactant flooding.
Istanbul Tıp Fakültesi mecmuasi, 1958
Istanbul Tıp Fakültesi mecmuasi, 1958
Istanbul Tıp Fakültesi mecmuasi, 1957
Nature, 1959
THE results of in vivo studies show that nicotinamide has a ketogenic effect on alloxanized rats1... more THE results of in vivo studies show that nicotinamide has a ketogenic effect on alloxanized rats1,2. On the other hand, Villa and Dioguardi3 observed that nicotinamide considerably increases the oxygen consumption of liver homogenates of normal rats in a medium containing sodium acetoacetate, and they suggested that this effect is the result of stimulation of the keto-oxidative system. Recently, we observed4 that the rate of oxygen uptake of liver homogenates of alloxanized rats rises after the addition of ethyl acetoacetate; but the oxygen consumption is not relatively higher after the addition of nicotinamide.
Journal of Peace Education, 2013
Euphytica, 1985
Three hundred and nineteen Rhynchosporium swdi.s isolates from cultivated barley were divided int... more Three hundred and nineteen Rhynchosporium swdi.s isolates from cultivated barley were divided into five groups on the basis of their virulence on IS differential barley varieties. Pathogenic variation was also demonstrated for isolates from different scald lesions within the same crop and amongst different sports from the same lesions.