Makale 2020-2029 yılları

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Average glandular doses and national diagnostic reference levels in mammography examinations in Turkey
(Oxford University Press, 2020-05) Parmaksız, Aydın; Ataç, G. K.; Bulur, Emine; İnal, Tolga; Alhan, Aslıhan; AAH-5187-2020; 0000-0003-4000-5175; TAEK-Radyasyon ve Hızlandırıcı Teknolojileri Dairesi Başkanlığı
In order to establish National Diagnostic Reference Levels (DRLs) for mammography examinations, Entrance Skin Air Kerma (ESAK), Entrance Skin Dose (ESD) and Average Glandular Doses (AGDs) were calculated for a total of 25624 cranio-caudal (CC) and mediolateral oblique (MLO) projections of 6309 patients for 40-49 and 50-64 age groups. The average ESAK and ESD values for both age groups were found to be higher in MLO projections compared to CC projections. The minimum and maximum values of AGDs were determined as 0.4 mGy and 7.9 mGy for both projections. The maximum numbers of AGDs for CC and MLO projections were calculated in the range of 1.1-1.5 mGy and 1.6-2.0 mGy respectively. The third quartile values of AGDs were calculated for each compressed breast thickness (CBT) between 20 mm and 99 mm. The first National DRLs of the country were established for each 10 mm CBT in mammography examinations.
Characterization of mutant garlic genotypes based on volatile sulfur compounds and mineral content
(Journal of Elementology, 2022-06-18) Beşirli, Gülay; Karakan, Faika Yaralı; Sönmez, İbrahim; Çetin, Berna Ergun; Erol, Ümit Haydar; Kantoğlu, K. Yaprak; Kunter, Burak; https://orcid.org/0000-0002-7247-9116; TENMAK-Nükleer Enerji Araştırma Enstitüsü-Ankara
This study was conducted to determine volatile sulfur compounds and mineral content of mutant garlic genotypes. The volatile sulfur compounds analysis was performed with a gas chromatography- mass spectrometer. The mineral content of mutant garlic genotypes was determined with an atomic absorption spectrometer and flame photometer. The results indicated that mutant garlic genotypes showed large variation in terms of their content of volatile sulfur compounds and minerals. A total of 16 volatile sulfur compounds were detected, which were mainly diallyl disulfide (68.09%), disulfide methyl propyl (52.34%), disulfide methyl 2-propenyl (29.81%), sulfide allyl methyl (25.72%), diallyl sulfide (22.38%) and disulfide dimethyl (9.88%). The macroand micro-elements detected in mutant garlic genotypes were K (232.45-513.25 mg L-1), Ca (2.19-7.35 mg L-1), Mg (7.38-21.64 mg L-1), Na (4.52-13.18 mg L-1), Cu (0.01-0.15 mg L-1), Fe (0.13-1.25 mg L-1), Mn (0.10-0.27 mg L-1), and Zn (0.12-0.69 mg L-1). As a result, it was determined that the content of both volatile sulfur compounds and minerals in mutant garlic genotypes was higher than in the control (cv. ‘Taşköprü 56’). The genotypes which had a higher content of both volatile sulfur compounds and minerals were GM1, GM8, GM18, GM20, GM21, GM22, GM33, GM35, GM36, GM37, GM39, GM40, GM46, and GM51. The research findings are extremely valuable in revealing the originality of mutant garlic genotypes obtained by mutation breeding, and establishing the foundation for an assessment of mutant garlic genotypes to be used in breeding programs.
Characterization of tomato genotypes by simple sequence repeats (SSR) molecular markers
(Biharean Biologist, Oradea, Romania, 2021-12-05) Aziz, Sibel; Kantoğlu, K. Yaprak; Tomlekova, Nasya; Staykova, Teodora; Ganeva, Daniela; Sarsu, Fatma; https://orcid.org/ 0000-0002-7247-9116; TENMAK-Nükleer Enerji Araştırma Enstitüsü-Ankara
Microsatellites are highly polymorphic regions containing gene loci represented by multiple alleles of different lengths and nucleotide sequences. The purpose of this study was to identify reproducible specific molecular profiles of tomato varieties and F1 hybrids from the collection of the Maritsa Vegetable Crops Research Institute, Bulgaria, and of mutant lines from the Nuclear Energy Research Institute, Turkey, by detecting polymorphic microsatellite loci as markers. The study included five varieties, four F1 hybrids Bulgarian tomato, five Turkish mutant lines, and an initial landrace analysed with 19 SSR markers located in different chromosomes of the tomato genome at a distance of 6.0 cM to 146.0 cM. Fifteen microsatellite markers were used to generate polymorphic profiles. The number of bands per microsatellite locus ranged from one to eight, with a total of 62 bands among the markers analysed. The average number of SSR alleles per locus was 3.26. The dendrogram constructed with the values of genetic distance showed that all fifteen genotypes are grouped into two major clusters. Twelve form one main cluster with subclusters, while the rest of them form the other cluster. The results of the present study complement the data on the genetic heterogeneity of tomatoes and could be useful for tomato breeding programes.
Descriptive process mineralogy to evaluate physical enrich-ment potential of malatya/kuluncak rare earth ore through MLA
(2022-12) Ersoy, Burakhan; Beşirli, M. Umut; Topal, Selim; Soydaş Sözer, Belma; Burat, Fırat; TENMAK-Nadir Toprak Elementleri Araştırma Enstitüsü
Rare Earth Elements (REE) are indispensable parts of magnetic, phosphor, metal alloys, catalysts, ceramics, glass, polishing, and defense systems industries due to their unique physical and chemical properties. Currently, China is the largest supplier in the world with a production of more than 95% of the world’s Rare Earth Oxides (REO). To reduce the influence of China on the REE market, the countries have started to develop their national strategies for the production and use of REE-bearing resources. Within the scope of this study, particle size, chemical, MLA, XRD, and SEM-EDS analysis were performed for material character-ization, and shaking table, centrifugal, and magnetic separations were carried out for the beneficiation of Malatya/Kuluncak rare earth ore. The XRD analysis indicated that the representative sample consists of major minerals such as albite, calcite, montmo-rillonite, muscovite, titanite, kaolinite, clinochlore, and aegirine. Parisite, bastnaesite, Zr-REE-Silicate, Fe-REE-Oxide, and Ca-Ti-Nb-REE-Oxide were detected as REE-bearing minerals by MLA. The chemical analysis resulted in a ∑REO grade of 3,628 g/t and the ore consists of mostly light REE. According to the result of the gravity separation for the coarsest fraction, about 11.3% by weight of the total feed was concentrated as a heavy product assaying 6,437 g/t ∑REO. As a result of magnetic separa-tion, magnetic products with 5,561 g/t and 6,013 g/t ∑REO were obtained at coarse and fine fractions, respectively. Finally, the characterization studies and enrichment results were correlated, and very important and meaningful indications about the be-havior of REE-bearing minerals were obtained.
Determination of mutagenic-sensitivity and induced variability in the mutant populatıons of ‘Bacardi’ chrysanthemum cultivar
(Genetika Belgrade, 2022-05-26) Haspolat, Gülden; Kunter, Burak; Kantoğlu, K. Yaprak; https://orcid.org/ 0000-0002-7247-9116; TENMAK-Nükleer Enerji Araştırma Enstitüsü-Ankara
Mutation breeding is one of the most important breeding method for ornamental plants. Chrysanthemum is the genus that has the richest mutant varieties in ornamental plants. The objective of this study is to create variation by gamma irradiation and improving traits by mutation breeding. For this aim, in vitro bud explants of white Bacardi variety were irradiated by gamma radiation at 20 Gy (Gray). In vitro subcultures were continued until M1V4 period and observations were obtained in this period. Some changes were observed on heights and flowers of the plants such as; variable flowers, flowering time, differentiation on plant length, flower number per bunch and ray floret differentiations. The changes of the ray florets were determined as color changes to pink and yellow. Mutation frequency was calculated by 1.1% of the population. Approximately 0.9% of useful mutant lines determined from the selected mutants.
Effects of gamma irradiation on seed germination in watermelon (Citrullus lanatus (Thunb.) matsum & nakai) and determination of effective mutation dose
(T.C. Tarım ve Orman Bakanlığı Tarımsal Araştırmalar ve Politikalar Genel Müdürlüğü Alata Bahçe Kültürleri Araştırma Enstitüsü Müdürlüğü, 2022-06-01) Kantoğlu, K. Yaprak; https://orcid.org/ 0000-0002-7247-9116; TENMAK-Nükleer Enerji Araştırma Enstitüsü-Ankara
Bu çalışma, Doğu Karadeniz Bölgesinde lokal olarak yetiştiriciliği yapılan Yalıncak karpuzunda (köy populasyonu) yürütülmesi planlanan mutasyon ıslahı çalışması için “Etkili Mutasyon Dozu” (EMD50)’nun belirlenmesi amacı ile yürütülmüştür. Bu amaçla, karpuz tohumları Co60 kaynağı ile 0, 150, 250 ve 350 Gy dozlarında ışınlanmıştır. Tohum ekimini takip eden 10. ve 30. günde, her doz için ışınlanan tohum ve bunlardan gelişen fidelerde farklı ışın dozlarının çimlenme, kök ve sürgün gelişimleri üzerine olan etkileri incelenerek, EMD50 değeri lineer regresyon analiziyle hesaplanmıştır. Buna göre yapılan uygulama sonucunda 278 Gy EMD50 olarak belirlenirken, 150 Gy’lik uygulamanın kontrol ve diğer ışınlama dozlarına göre ışınlamayı takip eden ilk on günlük sürede çimlenmeyi uyardığı ancak 350 Gy’lik uygulamanın tohum çimlenmesi üzerinde olumsuz etkisi olduğu %46’lık çimlenme oranı ile ortaya konmuştur. Yalıncak genotipinde yürütülecek mutasyon ıslahı çalışmalarında EMD5ö’nin %10 alt ve üst sınırları göz önüne alınarak 250-305 Gy arasındaki uygulamaların geniş bir varyasyon oluşumunu sağlayacak dozlar olduğu belirlenmiştir.
Natural radioactivity of a copper-zinc mine with a production facility in Türkiye and radiological consequences of the usage of tailing as a concrete additive
(Springer, 2023-01-08) Parmaksız, Aydın; Özkök, Yücel Özer; Ağuş, Yusuf; AAH-5187-2020; 0000-0003-4000-5175; TENMAK-Nükleer Enerji Araştırma Enstitüsü-Ankara
The dose rates of an underground copper-zinc mine and the radioactivities of collected samples were measured using a surveymeter and a gamma-ray spectrometer. There was no significant difference found between mine dose rates and background radiation in the region. The average activity concentrations of 226Ra, 232Th, and 40K in tailing samples were found to be 27%, 83%, and 71% higher than in ores, respectively. It was determined that a miner who worked in the mine for a year and was exposed to the natural radiation of the mine could be exposed to a radiation dose of less than 1 mSv. The annual radiation dose of a person living in a standard concrete room with a certain amount of tailing added to the concrete content was calculated to be 202.2 μSvy-1. Using tailings as concrete additives can help reduce waste released into the environment and make better use of natural resources.
Radiological assessment of the bauxite mining in Turkey and estimation of radiation dose contribution of the red mud as a concrete agent of the model room by using RESRAD-BUILD computer code
(Springer Publishing, 2020-10) Parmaksız, Aydın; AAH-5187-2020; 0000-0003-4000-5175; TAEK-Radyasyon ve Hızlandırıcı Teknolojileri Dairesi Başkanlığı
Red mud resulting from bauxite mining and processing is a cause of considerable concern because of the large amount of production and potential risks of long-lived natural radionuclides. In this study, samples taken from ore to end-products including waste in facilities were measured by gamma-ray spectrometry and radiological assessment indexes were calculated. For assessment of the usage of red mud as an additive in concrete, exposures of the occupant were calculated by using RESRAD-BUILD computer code for a model room. The radiological risk did not found for the use of red mud samples in the determined ratios in concrete.

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