45 research outputs found
Comparison of capillary electrophoresis and high performance liquid chromatography methods for caffeine determination in decaffeinated coffee
Relationship Between the Conformation of the Cyclopeptides Isolated from the Fungus Amanita Phalloides (Vaill. Ex Fr.)
Abstract: The electronic structures and conformational studies of the cyclopeptides, O-methyl-α-amanitin, phalloidin and antamanide, were obtained from molecular parameters on the basis of semiempiric and ab initio methods
Formation of Complexes of Flavonoids and Metals. Determination of the Stoichiometry and Stability Constants
The complexes between some flavonoids and metals (Co(II), Cu(II), Mn(II), Mg(II), Sn(II)) have been studied by spectrophotometric methods in order to determine the stoichiometry and stability constants