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Browsing by Subject "Thorium"

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    Türkiye’nin Marie Curie’si: Engin Arık
    (Bilkent University, 2023) Bilgi, İrem Fatmagül; Keleş, Sude Nur; Tarım, Duru; Ataman, Baturhan; Aydoğan, Sarp
    Engin Arık 14 Ekim 1948 yılında İstanbul'da doğdu. 1965 yılında Atatürk Kız Lisesinden mezun oldu. 1969 yılında ise İstanbul Üniversitesinden fizik ve matematik diploması alarak mezun oldu. Yüksek lisans için Pittsburgh Üniversitesine gitti ve orada kurumsal fizik alanına yoğunlaştı. 1979 da Boğaziçi üniversitesi bünyesine katıldı ve "Deneysel Yüksek Enerji Fiziği" alanında çalışmalar yaptı. 1990'lı yıllarda CERN'de çalışmaya başladı. CHARM II, CHORUS VE SMC deneylerinde çalıştı. ATLAS ve CAST deneylerinin Türk grup liderliklerini yaptı. katıldığı deneyler ve özellikle Toryum özelindeki çalışmalarıyla öne çıkan bir bilim insanı olmuştur. Bu nedenle de bu yazı Engin Arık'ın hayatı ve çalışmalarını anlatmak amacıyla yazıldı.
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    Variation of stability constants of thorium and uranium oxalate complexes with ionic strength
    (De Gruyter Oldenbourg, 1994) Erten, H. N.; Mohammed, A. K.; Choppin, G. R.
    The extraction of Th(IV) and UO!+ by a solution of TTA and HDEHP, respectively in toluene has been used to obtain stability constants of their oxalate complexes at 298 Κ in 1, 3, 5, 7 and 9 Μ ionic strength (NaC104) solutions. The complexes formed were the MOx, MHOx, MOx2 and M(HOx)2 (M = Th, U02) species. The values were analyzed by the Specific Interaction Theory and agreed to / < 3 Μ but required an additional term for fitting at / > 3 M.
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    Variation of stability constants of thorium citrate complexes with ionic strength
    (De Gruyter Oldenbourg, 1996) Choppin, G. R.; Erten, H. N.; Xia, Yuan-Xia
    Citrate is among the organic anions which are expected to be present in the wastes planned for deposition in the WIPP repository. In this study, a solvent extraction method has been used to measure the stability constants of Th(IV) with citrate anions in aqueous solutions with (a) NaClO4 and (b) NaCI as the back-ground electrolytes. The ionic strengths were varied up to 5 m (NaCl) and 14 m (NaClO4). The data from the NaClO4 solutions at varying pH values were used to calculate thermodynamic stability constants through the use of Specific Ion Interaction Theory (SIT).

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