Research Outputs

Permanent URI for this communityhttps://hdl.handle.net/20.500.14288/2

Browse

Filters

2007 - 200912010 - 20201

Advanced Search

Filter by

Settings

Quartile: search.filters.quartile.Q4Subject: search.filters.subject.Inorganic

Search Results

Now showing 1 - 2 of 2
  • Placeholder
    PublicationMetadata only
    CS4GE9 center dot en: a novel compound with [GE-9](4-) clusters - synthesis, crystal structure and vibrational spectra
    (Wiley-V C H Verlag Gmbh, 2007) Carrillo-Cabrera, Wilder; Kırcalı, Aslıhan; Faessler, Thomas F.; Hoffmann, Stephan D.; Department of Chemistry; Department of Chemistry; Aydemir, Umut; Somer, Mehmet Suat; Faculty Member; Faculty Member; Department of Chemistry; College of Sciences; College of Sciences; 58403; 178882
    Red-orange prismatic crystals of CS4Ge9.en (en = ethyl-enediamine) were obtained via metathesis reaction of an en solution of K4Ge9 with a large excess of CsI. The compound is very sensitive to air and moisture. CS4Ge9.en is not isotypic to Rb4Ge9.en and crystallizes in a new structure type (monoclinic, space group P2(1)/c (No. 14); a = 16.757(3), h = 16.462(3), c = 15.657(2) angstrom, beta = 90.37(1)degrees; Z = 8; Pearson code mP200). The crystal structure comprises two types (A and B) of discrete [Ge-9](4-)units arranged in the motif of a distorted hexagonal close-packing (h.c.p.). In this h.c.p. framework, each tetrahedral hole is filled by one Cs atom and each larger octahedral hole is tilled by a group of one en and two Cs atoms. The topology of the two crystallographically distinct [Ge-9](4-) clusters corresponds to distorted, monocapped tetragonal antiprisms with bond lengths varying in the range 2.551-2.848 angstrom (type A cluster) or in the range 2.538-2.975 angstrom (less regular type B cluster). According to the DTA and TG measurements, CS4Ge9.en decomposes at 378 K under liberation of gaseous ethylenediamine yielding CS4Ge9. The Raman spectra of the title compound were interpreted based on the idealized C-4v symmetry of an isolated [Geg](4-) cluster. The characteristic breathing mode was localized at 222 cm(-1). The results are analyzed and discussed in context with those of the previously reported compounds CS4Ge9, K4Ge9 and Rb4Ge9.en.
  • Placeholder
    PublicationMetadata only
    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.