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Furo- and pyranocoumarins from plant species Angelica silvestris and Peucedanum austriacum
(Journal of the Serbian Chemical Society, 1993)
An investigation of the coumarin content of plant species Angelica silvestris (roots and fruits) and Peucedanum austriacum (Jacq.) Koch (roots), both belonging to the family Apiaceae is reported. A. silvestris contained ...
Influence of sodium dodecyl sulfate on the reaction between Nile Blue A and hydrogen peroxide
(Srpsko hemijsko društvo, Beograd, 1999)
The influence of the anionic surfactant sodium dodecyl sulfate on the rate of the reaction between the cationic form of Nile Blue A and hydrogen peroxide was investigated in the pH range from 5 to 8.5. A retardation of the ...
Spectrophotometric investigation of complex formation between HMPAO and palladium(II) ions
(Srpsko hemijsko društvo, Beograd, 1996)
A system containing palladium(II) ions and dioxime HMPAO (H 2 L; L 2 = 4,8-diaza-3,6,6,9-tetramethylundecane-2, 10-dione dioximate ion) was investigated within a pH range of 2.0 to 7.5 (1 = 0.5 mol dm 3 ) using spectrophotometric ...
Anticoagulant effect of tungstophosphoric acid salt studied by IR spectroscopy
(Srpsko hemijsko društvo, Beograd, 1996)
The influence of the Li and Na salts of 12-tungstophosphoric acid H3P W12O40(WPA) was tested for in vitro effects on blood coagulation. It was found that only Li3WPA shows anticoagulant effects, but compared with WPA ...
Determination of midazolam in pharmaceutical dosage forms by second-order derivative ultraviolet spectrophotometry
(Srpsko hemijsko društvo, Beograd, 1997)
A second-order derivative ultraviolet spectroscopic method for the determination of midazolam in the presence of maleic acid is described. The assays were carried out in borate buffer (pH 9.2) at a wavelength of 222 nm, ...
A kinetic method for the determination of selenium(IV) in ethanol solution
(Srpsko hemijsko društvo, Beograd, 1997)
A kinetic method for the determination of selenium(IV) in ethanol solution is proposed. The method is based on the action of selenium(IV) upon the oxidation of Nile Blue A by hydrogen peroxide in the presence of phosphate ...
Spectrophotometric investigation of the uranil(II)-hesperidin complex in 70% methanol
(Srpsko hemijsko društvo, Beograd, 1998)
The composition and stability constant of the UO2(II)-hesperidin complex were determined by suitable spectrophotometric methods and pH-metric measurements. II was found that the uranil ion and hesperidin form a 1:2 complex ...
Spectroscopic investigation of the effects of monovalent cations on the dynamics of protonic species in the hydrates of 12-tungstophosphoric acid salts
(Srpsko hemijsko društvo, Beograd, 1996)
Heteropoly acids arc well known as supcrionic protonic conductors at room temperature. The conductivity depends upon the temperature and relative humidity of the surrounding. Recent results show that the conductivity is ...
Determination of sodium fusidate in dosage forms by high performance liquid chromatography
(Srpsko hemijsko društvo, Beograd, 1998)
A simple HPLC procedure, suitable for the determination of sodium fusidate (SF) in dosage forms, was developed. The method involves using a UV detector (208 nm) in the presence of basic buffered media (pH 7.25) under ...
High performance liquid chromatographic determination of clindamycin in pharmaceutical formulations
(Srpsko hemijsko društvo, Beograd, 1997)
A specific and simple HPLC procedure was developed, su table for the determination of dindamycin hydrochloride monohydrate (CLHC) and clindamycin 2-dihydrogenphosphate (CLPH) in pharmaceutical formulations. Rp-HPLC analysis ...