Türkiye Enerji, Nükleer ve Maden Araştırma Kurumu Kurumsal Araştırma Arşivi

Kurum yayınları ve kurum çalışanlarının yayınları “Açık Erişim” kapsamında yayınlanmaktadır. Açık Erişim “evrensel nitelikteki bilimsel bilginin insanlığın yararına sunulması” amacını taşır. Tezler, konferans bildirileri ve sunumlar ile makaleler kurum çalışanları tarafından sisteme girilmektedir.Tezler için; YÖK'ten alınan görüş doğrultusunda tez sahibinin izin vermesi yeterlidir. Konferans bildirileri ve sunumların yayına gönderildiği son hali arşive konulabilir.Makaleler için ise; hakem onayından geçmiş, yayına gönderildiği son halinin (post-print) Açık Erişime sunulmasına yayıncılar %90 oranında izin vermektedir. Arşivde şu an 1.639 yayın bulunmaktadır, çalışma bitiminde bu sayı yaklaşık 2.000 yayın sayısına ulaşacaktır.

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CONCEPTUAL EVALUATIONS FOR LOW-ENERGY ELECTRON BEAM (LEEB) AND COMPARISON WITH GAMMA IRRADIATION OF CITRUS FRUITS

(IAEA International Atomic Enerji Agency, 2024-05-31) TURAN, Özlem

The assessment and management of risk must satisfy the requirements set forth by importing nations in order for the Turkish agriculture sector to develop linearly. It must also guarantee that trade-related biosecurity risks are appropriately managed. In terms of agricultural exports, citrus fruits account for a significant portion of Türkiye's exports. On the other hand, conventional approaches are utilized to battle the Mediterranean fruit fly agent in addition to microbiological losses in the export of these products. It is widely accepted that fruits can have their risk factors minimized through the application of irradiation. Low-energy electron beam (LEEB) applications for fresh fruit phytosanitary purposes have gained significance recently. After conducting studies, it has emerged that using LEEB for the eradication of microorganisms on or near food surfaces or for phytosanitary purposes is both a sustainable and effective option in the food industry. This study provides a review of LEEB and gamma irradiation applications on citrus group fruits based on previous research. Additionally, a comparison will be conducted between both methods in terms of phytosanitary procedures, microbiological decontamination, and food quality. Also, conceptual and practical recommendations for potential LEEB technique use in the future were discussed.

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Experimental and theoretical assessment of selected pollutants treated with gamma radiation and hydrogen peroxide

(ELSEVIER, 2024-12-15) Genç, Ayşenur; Ergun, Ece; Fitoz, Alper; Kantoğlu, Ömer; İnce, Mahir; Acar, Orhan

Degradation of ibuprofen, triclosan, diclofenac, and ketoprofen in real wastewater effluent by gamma radiation/ hydrogen peroxide was investigated on the basis of removal efficiencies, G-values, and kinetics. Gamma irradiation was performed using a60Co source irradiator in the presence of different concentrations of hydrogen peroxide. The analyses of the pollutants were performed before and after irradiation treatment using a Liquid Chromatography-Mass Spectrometry (LC-MS) system. The addition of 0.5% hydrogen peroxide resulted in an enhanced removal efficiency of the target pollutants (93.92% for ibuprofen, 99.47% for triclosan, 86.65% for diclofenac, and 86.32% for ketoprofen) compared with the performance of the gamma irradiation process alone. The rate constants (k) of ibuprofen, triclosan, diclofenac, and ketoprofen increased by 1.42, 2.38, 1.38, and 3.37 times with 0.5% hydrogen peroxide addition, respectively. Moreover, the 90% decomposition of the target pollutants was achieved at lower doses in the gamma-ray/hydrogen peroxide system in comparison with the gamma treatment without hydrogen peroxide. Fukui functions and dual descriptor were calculated using density functional theory (DFT) to investigate the sensitivity of the target pollutants to hydroxyl radical attacks, to identify the initial reaction pathway, and to predict the degradation by-products. The findings were consistent with literature mechanisms and observed by-products.

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A potential new approach for preserving historical artifacts through gamma irradiation and green antimicrobials: Microbiological and theoretical screening

(ELSEVIER, 2025-08-16) Ergun, Ece; Halkman, Hilal B.D.; Kasımfırtına, Eren; Kantoğlu, Ömer; Ergun, Ümit; Orhan, Ersin

This study presents a novel combined treatment process for the decontamination of historical textiles, using gamma irradiation with green antimicrobial agents. Microbiological studies and theoretical approaches were utilized to investigate the effect of treatment processes individually and in combination on isolates from the textile museum. The mean D10 values and the required doses for complete inactivation were found to be 1.19 and 7.60 kGy for bacteria cocktail and 1.47 and 6.32 kGy for mold cocktail, respectively. The antimicrobial activities of two Schiff bases and their reduced derivatives were tested against gamma-resistant microorganisms by measuring the diameter of the inhibition zones. It was found that reduced derivatives exhibited higher antibacterial activity. All compounds were screened through an in-silico study to evaluate the physicochemical properties, drug-likeness, and toxicity profile. Molecular docking studies were performed to investigate the binding affinity of the title compounds against E. coli DNA gyrase B and topoisomerase IV. From the perspectives of both in vitro studies and computational analysis, L4 exhibited the highest biological activity. This finding revealed that the reduction of the imine bond and molecular flexibility have a significant influence on binding to the active site of the biomolecule. Finally, the combined treatment utilizing L4 with gamma irradiation demonstrated a synergistic effect, leading to a 2.6-fold reduction compared to the control, whereas the individual treatments of L4 and gamma irradiation exhibited approximately a 1-fold reduction. This synergistic effect presents an innovative approach to the historical artifact preservation, providing a more efficient and potentially safer decontamination strategy.

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Nuclear and Analytical Analysis Techniques That Primarily Used to Characterization of Ancient and Historical Materials

(Springer, 2026-04-02) Kantoğlu, Ömer; Kalayci, Yakup; Aydin, Büşra; Çantay, Eren; Ergun, Ece; Bulduk Akkuş, Emel; Mert, Yüksel; Kirkayak, Özgü; Gökalp, Metin; Aksu, Erhan; Gündoğdu, Gençay

Cultural artifacts, from ancient manuscripts to historic artworks, are vital symbols of national heritage and identity. The characterization of ancient artifacts is crucial for applying best practices in history and archaeology, including conservation, preservation, investigation, and the prevention of illegal trade. The illicit trafficking of these invaluable objects poses a significant threat to cultural preservation. The effective repatriation of stolen or illicitly exported cultural artifacts heavily relies on non-destructive methods, such as various nuclear and analytical techniques. These methods are critical not only for verifying the authenticity of the artifacts but also for establishing their provenance and legal ownership. This chapter explores the importance of analytical methods in the repatriation process applied in all over the world, highlighting their impact on the successful return of cultural treasures to their rightful owners.

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Fluid inclusion and Pb-O isotope constraints on the genesis of the Jurassic Karaburun VMS deposit (Central Pontides, Türkiye)

(SAPIENZA, 2026-03-13) Çavdar, Buğra; Günay, Kurtuluş; Mutlu, Hali̇m; Çantay, Eren; Ekebaş-Çavdar, Eli̇f; Çi̇ftçi̇,Emi̇n; Abdelnasser, Amr

The Jurassic Karaburun deposit of the Central Pontides represents one of the largest known volcanogenic massive sulphide (VMS) systems in Türkiye, comprising ~125 Mt of ore with average grade 1.16 wt% Cu, 0.25 wt% Zn, and 0.05 wt% Co. Mineralization is hosted by low-grade greenschist-facies rocks of the Çangaldağ Metamorphic Complex (CMC), where volcaniclastic and detrital successions interlayered with deep-marine sediments are intruded by mafic dikes and sills. Ore occurs mainly as stratiform, sheet-like to tabular bodies, expressed by disseminated, banded, pyritic clastic, semi-massive, and massive sulphide textures. To constrain ore-fluid evolution and metal provenance, we investigate primary fluid inclusions in ore-stage quartz and combined microthermometry with quartz δ18O and massive-sulphide Pb isotopes. Two-phase inclusions yield eutectic temperatures of −26 to −11 °C and lack clathrate formation, indicating a dominant H2O-NaCl system. Homogenization temperatures of 178-301 °C, corrected for ~160 bar hydrostatic pressure, imply trapping at 223±25 °C; ice-melting temperatures correspond to 1.4-11.1 wt% NaCl equiv. (mean 6.5 wt%). Moderately elevated salinity and the absence of boiling features support seawater-derived fluids modified by subseafloor circulation, with limited magmatic input. Quartz δ18O values (11.79 ‰ to 14.40 ‰ VSMOW) require isotopically evolved fluids, giving δ18O(fluid) of ~3-6‰ at FI-constrained temperatures. Pb isotope ratios (208Pb/204Pb=37.463-37.751; 207Pb/204Pb=15.424-15.503; 206Pb/204Pb=18.079-18.431) are weakly radiogenic and narrowly variable, consistent with a predominately mantle-derived Pb source. Collectively, these constraints indicate formation in a Jurassic ensimatic arcback- arc basin undergoing rifting, with chiefly seawater hydrothermal fluids modestly overprinted by magmatic volatiles.

Türkiye Enerji, Nükleer ve Maden Araştırma Kurumu Kurumsal Araştırma Arşivi

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