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    Determination of thyroglobulin levels by radioimmunoassay method in anti thyroglobulin positive differentiated thyroid patients: one center clinical experience
    (Pergamon-Elsevier Science Ltd, 2020) Uçar, Burcu; Şen, Melis; Acar, Tayfun; N/A; Demirkol, Mehmet Onur; Faculty Member; School of Medicine; 196946
    It is very crucial to determine Tg accurately and precisely in thyroid cancer cases. Although there are many studies on the detection of Tg in thyroid cases in the literature, there are no sufficient clinical studies examining many cases with different features by using RIA methodology. Here, a radiometric and chromatographic method has been studied for the first time to eliminate the interference from anti-Tg positive patients. In this paper, radioimmunoassay (RIA) and immunoradiometric (IRMA) techniques were used for the analysis of 302 sera collected from patients for Tg and TgAb quantification. By the RIA technique, a reliable result was obtained by calculating the real Tg value quantitatively in 41 patients showing TgAb positivity out of 208 patients. Our findings show that the RIA assay is the most suitable approach for detection of changeable (low or undetectable) Tg value and metastases detected by post-therapeutic imaging in early-stage DTC cases showing preoperative and postoperative TgAb positivity. The new immunoradiometric method allows the real (%) Tg value to be reached in a part of TgAb-positive DTC. Even if TgAb positive in the metastatic and nonmetastatic DTC patient group. This allows the accurate clinical follow-up of patients.
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    Enhanced water stability and high CO2 storage capacity of a Lewis basic sites-containing zirconium metal-organic framework
    (2021) Demir, Selçuk; Bilgin, Nuray; Çepni, Hamide Merve; Furukawa, Hiroyasu; Yılmaz, Fatih; N/A; Department of Chemical and Biological Engineering; Altıntaş, Çiğdem; Keskin, Seda; Researcher; Faculty Member; Department of Chemical and Biological Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; 40548
    Metal–organic frameworks (MOFs) are an emerging class of materials employed for custom-designed purposes by judicious selection of linkers and metal ions. Among the MOFs composed of carboxylate linkers, Zr-based MOFs have attracted great attention due to their high thermal and chemical stabilities, which are important for practical applications, including capturing CO2 from a point source. UiO-67(bipy) containing 2,2′-bipyridine-5,5′-dicarboxylate is particularly useful among the Zr-MOF family due to the Lewis basic sites of the linker; however, the hydrolytic stability of UiO-67(bipy) does not seem to be as high as those of UiO-66 and UiO-67. To improve the hydrolytic stability without sacrificing the adsorption enthalpy of CO2 for selective CO2 capture, in this study, we added hydrophobic methyl groups to the backbone of the bipyridine linker. The synthesized 6,6′-dimethyl-2,2′-bipyridine-5,5′-dicarboxylic acid (H2Me2bipy) was used to prepare a Zr-based MOF [MOF-553, Zr6O4(OH)4(Me2Bipy)6]. In addition, the water stability and CO2 adsorption capacity of MOF-553 were compared to those of UiO-67(bipy). We revealed that MOF-553 is more robust and has a higher CO2 adsorption capacity than UiO-67(bipy), indicating that the methylation of the linker improves the water stability of the framework, which is advantageous for point-source CO2 capture.
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    Synthesis, crystal structures, and vibrational spectra of novel azidopalladates of the alkali metals cs-2[pd(n-3)(4)] and rb-2[pd(n-3)(4)]center dot 2/3h(2)o
    (Wiley-V C H Verlag Gmbh, 2010) Hoehn, Peter; N/A; Department of Chemistry; Afyon, Semih; Somer, Mehmet Suat; Master Student; Faculty Member; Department of Chemistry; Graduate School of Sciences and Engineering; College of Sciences; N/A; 178882
    The transparent dark orange compounds Cs-2[Pd(N-3)(4)] and Rb-2[Pd(N-3)(4)]center dot 2/3H(2)O are synthesized by reaction of the respective binary alkali metal azides with K2PdCl4 in aqueous solutions. According to single-crystal X-ray diffraction investigations, the novel ternary azidopalladates(II) crystallize in the monoclinic space group P2(1)/c (no. 14) with a = 705.7(2) pm, b = 717.3(2) pm, c = 1125.2(5) pm, beta = 104.58(2)degrees, mP30 for Cs2[Pd(N-3)(4)] and a = 1041.4(1) pm, b 1292.9(2) pm, c = 1198.7(1) pm, beta = 91.93(1)degrees, MP102 for Rb-2[Pd(N-3)(4)]center dot 2/3H(2)O, respectively. Predominant structural features of both compounds are discrete [Pd-II(N-3)(4)](2-) anions with palladium in a planar coordination by nitrogen, but differing in point group symmetries. The vibrational spectra of the compounds are analyzed based on the idealized point group C-4h of the spectroscopically relevant unit, [Pd(N-3)(4)](2-) taking into account the site symmetry splitting due to the symmetry reduction in the solid phase.