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Item Kavunda (Cucumis Melo L.) normal ve ışınlanmış çiçek tozları ile tozlama sonrasında çiçek tozu çim borusu gelişiminin dişicik borusunda İncelenmesi üzerinde bir araştırma(İstanbul Üniversitesi, 1996) Kantoğlu, K. Yaprak; Yanmaz, Ruhsar; TAEK-SANAEMBu çalışmada, gama ışınlamasının (300-350 Gy) kantalop kavunu (Cucumis melo var. cantalupensis) ıslah çalışmasında umutvar bulunan A hattına ait çiçek tozlarının in vitro canlılığı ve çim borusu uzunluğu ile çiçek tozu çim borularının dişicik borusu içinde içinde gelişimi üzerinde etkileri araştırılmıştır. Işınlamadan 24, 48, 72, 96, 120 ve 144 saat sonra in vitro koşullarda yapılan sayım ve ölçümler sonucunda, çiçek tozu canlılığı üzerinde ışınlamanın etkili olduğu, ışınlamanın çiçek tozu canlılığını azalttığı, ışın dozunun ve çiçek tozu yaşının artışına bağlı olarak canlılık oranının hızla düştüğü belirlenmiştir. Bunun yanında ışınlama çiçek tozu çim borusu uzunluğunu da azaltmış, çim borusu uzama hızındaki azalma 300 Gy'lik dozda kontrol ve 350 GY'e göre daha fazla bulunmuştur. In vivo koşullarda, ışınlanmış çiçek tozlarının %64,54'ü dişicik borusu içinde gelişerek yumurtalığa kadar ulaşmıştır. Kontrolda ise bu oran %93,46 olarak belirlenmiştir.Item Doğal zeolitlerin bazı elementleri adsorplama şartlarının ve γ-radyasyonunun adsorplama şartlarına olan etkilerinin araştırılması(Dumlupınar Üniversitesi, 1997-09) Başsarı, Asiye; Yıldırım, Abidin; Akyüz, Tanıl; Baş, Neşet; Ekinci, Şinasi; TAEK-ÇNAEMDünyada hızla artan çevre kirliliği tehlikeli boyutlara ulaşmaktadır. Hava, su ve toprakta eser ve toksik element seviyelerinde hızlı bir artış görülmektedir. Bunlar doğrudan veya dolaylı olarak insanları olumsuz olarak etkileyebilir ve zararlı biyolojik etkileri oluşabilir. Eser ve toksik elementin iyonları, katı bir maddenin iyonları ile yer değiştirilerek suda çözünmeyen zararsız bir hale dönüştürülmesi uygulanan yöntemlerden sadece biridir. Sentetik olarak yapılan iyon değiştirici maddeler, killi topraklar ve zeolitler bu amaç için kullanılmaktadır. Bu çalışmada, İstanbul içme suyunun temizlenmesi için doğal zeolitin sezyum ve kurşun elementlerini adsorplama şartları incelenmiştir. Çalışmada sezyum ve kurşun elementlerinin çözeltileri hazırlanarak, deneyde kullanılan clinoptilolite olarak belirlenen zeolitin dağılım sabiteleri (Kd) ve Freundlich izotrem eğrisi saptanmıştır. Ortam pH değerinin değişiminin bahsedilen faktörlere olan etkileri incelenmiştir. 50 Ci aktivtede olan 60Co radyoaktif kaynak ile 24 saat ışınlanarak Kd ve Freundlich soğurma eğrisi saptanmıştır. Örnekler içindeki sezyum(Cs) ve kurşun (Pb) iyonu konsantrasyonları, Enerji Dağılımlı X-Işını Floresans (EDXRF) Analiz tekniği kullanılarak hesaplanmıştır.Item Kavun (Cucumis Melo L.)’da farklı bitki kısımlarının ve ortam bileşiminin somatik embriyo oluşumuna etkileri(Ankara Üniversitesi Basımevi, 1999) Yanmaz, Ruhsar; Kantoğlu, K. Yaprak; TAEK-ANTHAMBu araştırmada kavunda somatic embriyo oluşumu üzerinde in vitro koşullarda kullanılan farklı eksplantların ve değişik bileşimdeki besin ortamlarının etkileri araştırılmıştır. Araştırma sonucunda ½ kuvvetinde hazırlanan 2,4 D (0,5 mg/l) ve kinetin (0,5 mg/l) içeren MS besin ortamında kültüre alınan kotiledon eksplantlarından somatic embriyo elde edilebilmiştir. Embriyo rejenerasyon oranı %1,5 olarak belirlenmiş ve bu embriyoların %3,3’ü bitkiye dönüşmüştür.Item Büyük çaplı (>8 inç) korozyonlu borularda radyografik teğet tekniği ile cidar kalınlığı ölçümü(TMMOB Metalurji Mühendisleri Odası, 1999-09-29) Ekinci, Şinasi; Aksu, Mehmet; Doğruöz, Mustafa; Kurtcebe, Tekin; Bingöldağ, Murat; Yıldırım, Abidin; Baş, Neşet; Sarıçam, Serdar; Yılmaz, Necati; TAEK-ÇNAEMSıcak ve soğuk su boru hatlarında kimyasal ve/veya elektrokimyasal olaylar sonucu meydana gelen korozyon, oyuklar, çatlaklar ve boru cidarının incelmesi ile sonuçlanmaktadır. Borularda cidar kalınlığı ölçümü, korozyon miktarının ve işletme ömrünün belirlenmesi, güvenlik ve ekonomik kullanım açısından büyük önem taşımaktadır. Bu çalışmada, ısı santrallerinden, içme suyu şebekelererinden ve piyasadan temin edilen büyük çaplı (>8 inç) korozyonlu boru örneklerinin cidar kalınlıkları radyografik teğet tekniği ile ölçülmüştür. Boru çapına ve cidar kalınlığına bağlı olarak x- ve gama-ışını radyasyon kaynakları kullanılmıştır. Büyük çaplı borularda, cidar kesiti görüntüsünü oluşturan ışınların iç ve dış cidar teğet noktaları ile film arasındaki mesafe büyük olduğundan, görüntü tanımlaması zayıflamakta ve radyograftan kalınlık okuması zorlaşmaktadır. Tanımlamayı yükseltmek için, optimum ışınlama parametreleri farklı boru çapları ve cidar kalınlıkları için araştırılmıştır.Item Automated radiation monitoring and early warning systems network (Resa)(Turkish Atomic Energy Authority, 2000-10) Küçükarslan, Necati; Erdoğan, Adem; Güven, Ahmet; TAEK-ÇNAEMItem Determination of the gross alpha and beta radioactivity levels in Emendere Village (Sındırgı-Balıkesir) drinking water(Turkish Atomic Energy Authority, 2000-10) Doğru, Mahmut; Canbazoğlu, Cumhur; Baykara, Oktay; Külahçı, Fatih; Boz, Adil; 1516; Bölüm YokOver 40 years old 600-700 years old people in good condition live in about 300 houses in Emendere village. Most of drinking and usage water, and 70% of Sindirgi’s (Balikesir) drinking water are supplied by two main natural sources from Emendere. Apart of those sources, restorative water source near the village settlement place is commonly used for bathing. The gross alpha and beta radioactivity levels in Sindirgi’s drinking water are firstly determined by CNAEM (Cckmece Nuclear Research and Training Centre) in 1999. Determined levels were both higher than the limits accepted by WHO (World Health Organisation) and TSE (Turkish Standards Institute) in drinking water. In this study, the gross alpha and beta radioactivity levels in usage and drinking water in the same place are determined by using more sample collected over the village and obtained results are conclude according to the standards determined by WHO and TSE. Ca and Mg concentrations, temperatures and pH are also determined and conclude. A health team from Balikesir State Hospital is also searched through the most of the village population. None of the radiation caused sickness was found during this search.Item The transformation of local structure in fused silica and alkali-borosilicate glasses at separate and combined influence of radiation and high temperature(Turkish Atomic Energy Authority, 2000-10) Abdiyazov, P. Z.; Khaydarova, Kh. A.; Masharipov, K. Yu.; Nuritdinov, I.; Vakhidov, Sh. A.; Bölüm YokItem The present status of safeguards in Turkey(Turkish Atomic Energy Authority, 2000-10) Yılmazer, Ayhan; Yücel, Aysun; TAEK-NGDRepublic of Turkey signed Non-Proliferation Treaty (NPT) in Vienna, Austria on January 28, 1969 and the Treaty was ratified by Turkish Parliament on March 29, 1979. International Atomic Energy Agency (IAEA) and Republic of Turkey signed the Safeguards Agreement on June 30, 1981. Turkey accepted the international safeguards administered by IAEA and at the same time its subsidiary arrangements and Facility attachments were enforced for all nuclear facilities as an Non-Nuclear-Weapon State party to NPT. Regulation on Nuclear Materials Accounting and Control, which was prepared in accordance with Agreement Between the Government of Turkey and IAEA for the application of Safeguard in Connection with the Treaty on NPT, has been put into force since it was published in Official Gazette on September 10, 1997. This study presents the essential futures of national system of accounting for and control of nuclear materials in Turkey.Item Investigation of neutron induced aging of NPP Kozluduy WWER RPV steels(Turkish Atomic Energy Authority, 2000-10) Vodenicharov, St.; Kamenova, Tz.; Bölüm YokItem Proton, neutron and pion induced soft errors in computer memory chips(Turkish Atomic Energy Authority, 2000-10) Peterson, R. J.; Bölüm YokItem Investigation of powder properties of Ce2(C2O4)3.nH20 derived CeO2 for the preparation of (Th,Ce)O2 pellets(Turkish Atomic Energy Authority, 2000-10) Altaş, Yüksel; Çelik, Fatih; Tel, Hüseyin; 11349; Bölüm YokThe preparation conditions and powder properties of cerium oxalates and derived oxide powders were investigated to obtain of high homogeneity and density (Th,Ce)O2 mixed-oxide pellets. For this purpose, Ce2(C2O4)3 nH2O was precipitated from cerium nitrate solutions with an excess of oxalic acid. Thermal decomposition of the Ce2(C2O4)3 nH2O powder was investigated and the conversion temperature to oxide was determined. The effects of different calcining treatments on the physical properties of the oxide powders were evaluated.Item Radiation stability of biodegradable lactic acid polymers(Turkish Atomic Energy Authority, 2000-10) Kantoğlu, Ömer; Özbey, Turan; Güven, Olgun; TAEK-ANTHAMItem Levels of polonium-210 in the grapevine leaves in Alaşehir district of Turkey(Turkish Atomic Energy Authority, 2000-10) Gürboğa, Gülşen; Ölmez Aytaş, Şule; Bölüm YokThe objective of present work is the estimation of Po-210 (polonium) content in the edible grapevine leaves (Vitis vinifera, L.cv Sultana syn.) collected from Gediz plain in Western Turkey. Alaşehir District in Gediz plain is one of the most important wineculture region of Turkey. Grapevine leaves are important food material for Dolma in Turkish cuisine. Dolma is a name applied to such vegetables as grapevina leaves, cabbage leaves and green peppers stuffed groundmeat or spiked rice. Levels of Po-210 in the grapevine leaves had not been analyzed before in Turkey. In this study, after wet ashing of grapevine leaves, Po-210 was spontaneously plated onto a copper disc from dilute hydrochloric acid medium and deposited activity was measured. The results for Po-210 in the grapevine leaves are compared with the other foodstuff values in the literature.Item Preparing an estrogen-derivative compound labeled with Tc-99m and determination of radiopharmaceutical potential(Turkish Atomic Energy Authority, 2000-10) Enginar, Hüseyin; Ünak, Perihan; Yurt, Fatma; Biber, F. Zümrüt; 58588; Bölüm YokIn recent years, estrogen derivative compounds have been used with several purpose which may lead to rapid advances in both diagnosis and therapy of some human cancers. In this study, an estrogen derivative compound (ESTCPTA) that 3,17-( β-estradiolyl propinol attached with 1-(4-methylbenzoic acid)-4,8,11- tetraazacyclotetradecane (CPTA) was synthesized at five steps. Synthesized product was purified by recrystallization in ethyl alcohol. Characterizations of purified products were made by NMR and IR spectroscopy. Synthesized compound was labeled with Tc-99m. RTLC (Radio Thin Layer Chromatography) and radiopaper electrophoresis were used to determine radiochemical yields. Specific activity was approximately 23.7 GBq/mmol and labeling yield was over 95%. Biodistribution studies were performed on female Albino Wistar rats. Rats were sacricified by ether narcotization at certain time intervals and the organs were removed. Their activities were counted by a gamma counter. The activity per gram tissue was calculated and time activity curves were generated.Item The resistive magnetohydrodynamics (MHD) in thermonuclear discharges :theory and experiment(Turkish Atomic Energy Authority, 2000-10) Bayramoğlu, A. Özer; TAEK-ÇNAEMIt has been understood that thermonuclear plasma confinement and behaviour of the plasma was mostly depend upon the magnetic surfaces on which the confining magnetic field and the plasma current he. However magnetic surfaces are not stable and prone to the magnetohydrodynamic(MHD) stabilities and reconnection and finaly they lead to the magnetic island formation. Resistive magnetohydrodynamics and instabilities are reviewed both experimentally and theoretically, among them; tearing mode and mode locking phenomena, topological relaxation (sawteeth oscillation), magnetic island overlap and plasma minor and major distruption.are investigated. The tearing mode growth rate are determined. Magnetic field reconncection on the rational surfaces and magnetic island formation, magnetic island growth rate and plasma confinement relation and energy confinemenet degradation are emphasized: The island width and island evaluation equations are derived. Performance limitation and MHD activities and mode structure m=0,n=0,m=1,n=1 and their sidebands and overlap are reviwed. Plasma distruptive phenomena with up to date experiments are presented.Item A statistical study of filtres used as shielding for PC monitors(Turkish Atomic Energy Authority, 2000-10) Tuğrul, A. Beril; Altınsoy, Nesrin; Ayaz, Birsen; 200243; Bölüm YokIn this paper it was aimed to obtain a radiological study about the attenuation of radiation of PC fdters which are produced by different companies. For this purpose different radiation sources were used for UV (ultraviolet) IR (infrared), visible light and X-ray radiation. For every type of radiation measurements, the most proper detector was selected. The radiation measurements were made with and without fdters and the measurements were taken for different distances. Measurements have bee observed for white & black and coloured monitors radiation levels for X-ray emission. All results were compared according to related regulations. Furthermore all data evaluated statistically in the point of view of public safety.Item Burnup performances of boron nitride and boron coated nuclear fuels(Turkish Atomic Energy Authority, 2000-10) Durmazuçar, Hasan H.; Bölüm YokThe nuclear fuels of urania (UOV and 5% and 10% gadolinia (Gd203) containing U02 previously produced by sol-gel technique were coated with first boron nitride (BN) then boron (B) thin layer by chemical vapor deposition (CVD) and also by plasma enhanced chemical vapor deposition (PECVD) techniques to increase the fuel cycle length and to improve the physical properties. From the cross-sectional view of BN and B layers taken from scanning electron microscope (SEM), the excellent adherence of BN onto fuel and B onto BN layer was observed in both cases. The behavior of fuel bumup, depletion of BN and B, the effect of coating thickness and also Gd203 content on the bumup performances of the fuels were identified by using the code WIMS-D/4 for Pressurized Water Reactor (PWR) and Boiling Water Reactor (BWR) cores. The optimum thickness ratio of B to BN was found as 4 and their thicknesses were chosen as 40 pm and 10 pm respectively in both reactor types to get extended cycle length. The assemblies consisting of fuels with 5% Gd203 and also coated with 10 pm BN and 40 pm B layers were determined as candidates for getting higher bumup in both types of reactors.Item Preparing activated carbon from charcoal and investigation of the selective uranium adsorption(Turkish Atomic Energy Authority, 2000-10) Kütahyalı, Ceren; Eral, Meral; 162663; Bölüm YokItem The effects of hydrogen concentration in reducing atmosphere on microstructure of U02 fuel pellets(Turkish Atomic Energy Authority, 2000-10) Ayaz, Birsen; Bilge, Ali Nezihi; Bölüm YokIn both conventional high temperature and low temperature sintering techniques, hydrogen is used as sintering and reducing atmosphere to prepare uranium dioxide fuel pellets. It is well known that hydrogen is a dangerous gas to work with. In this work it was aimed to investigate the effects of low-level hydrogen concentration used in reducing atmosphere on micro structure of U0 2 fuel pellets produced by low temperature sintering. Different ratios of H2/Ar (0.1%H2+99.9%Ar, 0.5%H2+99.5%Ar, l%H2+99%Ar and 0%H2 (pure argon)) atmospheres were used as reducing atmosphere for 1, 2, 3 and 6 hours. It was determined that using very low-level hydrogen (1%) in reducing atmosphere prevents the formation of other oxides.Item General formulation of standard model the standard model is in need of new concepts(Turkish Atomic Energy Authority, 2000-10) Khodjaev, L. Sh.; Bölüm YokThe phenomenological basis for formulation of the Standard Model has been reviewed. The Standard Model based on the fundamental postulates has been formulated. The concept of the fundamental symmetries has been introduced: To look for not fundamental particles but fundamental symmetries. By searching of more general theory it is natural to search first of all global symmetries and than to leam consequence connected with the localisation of this global symmetries like wise of the standard Model.