Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Tsvetanka K. Nedeltcheva"'
Publikováno v:
American Chemical Science Journal. 13:1-15
Publikováno v:
Open Chemistry, Vol 11, Iss 3, Pp 381-387 (2013)
Abstract Detailed investigations on the possibility for determination of the oxygen stoichiometry in YBa2Cu3Oy superconducting samples by measuring the absorbance of the colored Co(III)-EDTA and Cu(II)-EDTA complexes in one solution have been perform
Autor:
Stela Georgieva, Liliya G. Nikolova, Rahila G. Borissova, Tsvetanka K. Nedeltcheva, Andriana Surleva
Publikováno v:
Open Chemistry, Vol 10, Iss 6, Pp 1875-1881 (2012)
Spectrophotometric study of competitive complex formation equilibria involving overlapped spectral responding species applying a simple and versatile algorithm was carried out. The algorithm involves multivariable regression for calculation of equili
Publikováno v:
Open Chemistry, Vol 3, Iss 3, Pp 432-440 (2005)
The oxygen stoichiometry in R1−x Ca x Ba2Cu3O y (R=Eu, Er, Gd; x=0, 0.2, 0.25, 0.3) superconducting bulk samples was determined spectrophotometrically. The dependence of the critical temperature on the y-oxygen coefficient and the x-coefficient of
Publikováno v:
Talanta. 77(5)
The conditions for formation of the I(3)(-)-starch compound and measuring its absorbance have been found, and a spectrophotometric method has been developed for the determination of the oxygen content in YBa(2)Cu(3)O(y) superconducting bulk samples.