Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Z. Štefanac"'
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 40:232-235
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00f8759aa6ebe0de259447d84bc8b79b
https://doi.org/10.1107/s0108270184003681
https://doi.org/10.1107/s0108270184003681
Autor:
Z. Cimerman, Z. Štefanac
Publikováno v:
Polyhedron. 4:259-268
The protonation equilibria of 2-amino-3-aminomethyl-4,6-disubstituted pyridines were studied by potentiometric titrations and by UV and 13C NMR spectrometry. Protonation constants log K1 and log K2 potentiometrically determined for 4-methoxymethyl-6-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e22cf4496c339f68f9003c386f32e9cc
https://doi.org/10.1016/s0277-5387(00)84498-8
https://doi.org/10.1016/s0277-5387(00)84498-8
Publikováno v:
Microchemical Journal. 19:37-41
A simple and relatively rapid procedure for the estimation of calcium in organometallic compounds is described. The oxygen filled flask for decomposition of the organic sample and AAS determination of the metal in aqueous medium without any effect of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7530c90fe9ae245cf477b06af7bb88c3
https://doi.org/10.1016/0026-265x(74)90097-6
https://doi.org/10.1016/0026-265x(74)90097-6
Publikováno v:
Journal of Inorganic and Nuclear Chemistry. 43:3357-3361
The complex species of cobalt formed with 4-(2-thiazolylazo)resorcinol (TAR = H 2 Tar) in aqueous solution at pH 6–8 can be efficiently extracted by tetraphenylarsonium- and tetraphenylphosphonium chloride in chloroform and similar chlorinated solv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98e3360166ad44cb4fe0081e6665040e
https://doi.org/10.1016/0022-1902(81)80115-7
https://doi.org/10.1016/0022-1902(81)80115-7
Publikováno v:
Analytica Chimica Acta. 75:101-109
Complex species involved in the spectrophotometric determination of cobalt with 4-(2-pyridylazo)resorcinol (PAR = H 2 R) were studied in solution and in the solid state. An anionic [Co(III)R 2 ] - species was extracted from aqueous solution in chloro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5446e34e760ee74e04e64dd3ae099098
https://doi.org/10.1016/s0003-2670(01)81957-7
https://doi.org/10.1016/s0003-2670(01)81957-7
Publikováno v:
Microchemical Journal. 21:129-134
A rapid titrimetric method for the determination of phosphorus in organic compounds and their metal complexes is described. It is based on the precipitation of silver phosphate, after the decomposition of samples by the oxygen-flask combustion. The p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33332849339fe62e4c03d033fe6ae302
https://doi.org/10.1016/0026-265x(76)90107-7
https://doi.org/10.1016/0026-265x(76)90107-7
Publikováno v:
Microchemical Journal. 24:536-544
Extraction of vanadium-4-(2-thiazolylazo)resorcinol complexes by quaternary salts such as triphenylmethylarsonium iodide, tetraphenylarsonium chloride, and tetraphenylphosphonium chloride has been studied. Quantitative extraction is achieved with tet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45d2adbae549dc48fc4dfe7836c78fa3
https://doi.org/10.1016/0026-265x(79)90102-4
https://doi.org/10.1016/0026-265x(79)90102-4
Autor:
L. Kosta, Z. Štefanac
Publikováno v:
Fresenius' Zeitschrift für Analytische Chemie. 297:335-338
There are twenty chemistry departments at Yugoslavian universities and polytechnics with as many chairs of Analytical Chemistry. The individual courses show considerable differences with regard to their extent and content. The share of Analytical Che
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ea18160ad2221c9904b213296cb6036
https://doi.org/10.1007/bf00488368
https://doi.org/10.1007/bf00488368
Publikováno v:
Polyhedron. 2:447-453
The condensation of ethyl-2-hydroxy-4-oxo-4-(4-hydroxy-6-methyl-2-pyrone-3-yl)-2-butenoate with primary aliphatic monoamines occurs at 4-hydroxy group of the pyrone ring according to 1 HNMR and mass spectrometric data. The ketamine tautomeric form of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c49f27c783aee5924847a239fd92f109
https://doi.org/10.1016/s0277-5387(00)87091-6
https://doi.org/10.1016/s0277-5387(00)87091-6
Publikováno v:
Microchemical Journal. 27:372-379
The study of D(−)-ribose complexing with calcium in aqueous solutions less than 1.64 × 10 −1 M by potentiometric measurements with a calcium selective electrode afforded the value of K 1 = 1.70 liters × mole −1 (SD = 1.05 × 10 −3 ). Numeri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f369d896259ce2a8080e7aaf09507e9
https://doi.org/10.1016/0026-265x(82)90026-1
https://doi.org/10.1016/0026-265x(82)90026-1