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Prikaz rezultata 11-20 od 106
Analytical application of derivative spectrophotometry / Analitička primena derivativne spektrofotometrije
(Srpsko hemijsko društvo, Beograd, 2000)
1. Introduction 2. Basic characteristics of derivative spectrophotometry 2.1. Increase of spectra resolution 2.2. Elimination of the influence of baseline shift and matrix interferences 2.3. Enhancement of the detectability ...
Application of experimental design in the examination of the dissolution rate of carbamazepine from formulations. Characterization of the optimal formulation by DSC, TGA, FT-IR and PXRD analysis
(Srpsko hemijsko društvo, Beograd, 2015)
Poor solubility is one of the key reasons for the poor bioavailability of carbamazepine drugs. This study considers formulation of solid surfactant systems with carbamazepine, in order to increase its dissolution rate. ...
Belousov-Zhabotinsky oscillatory reaction: Kinetics of malonic acid decomposition / Belousov-Žabotinski oscilatorna reakcija - kinetika razlaganja malonske kiseline
(Srpsko hemijsko društvo, Beograd, 2000)
The kinetics of the Belousov-Zhabotinsky (BZ) oscillatory reaction was analyzed. With this aim, the time evolution of a reaction mixture composed of malonic acid, bromate, sulfuric acid and cerium(III) was studied at 298 ...
Substituted proline derivatives as organocatalysts in the Michael reaction
(Srpsko hemijsko društvo, Beograd, 2014)
Chiral, polysubstituted proline esters, obtained via cycloaddition reactions of azomethine ylides, were studied as organocatalysts in the Michael reaction of aldehydes/ketones and vinylsulphones. Under optimised reaction ...
Normal-phase thin-layer chromatography of some angiotensin converting enzyme (ACE) inhibitors and their metabolites / Normalno-fazna tankoslojna hromatografija nekih ACE inhibitora i njihovih metabolita
(Srpsko hemijsko društvo, Beograd, 2009)
The separation and chromatographic behaviour of five ACE (angiotensin converting enzyme) inhibitors and their four active metabolites were investigated by normal-phase thin-layer chromatography on silica using several mono- ...
The physicochemical and thermodynamic properties of the choline chloride-based deep eutectic solvents
(Srpsko hemijsko društvo, Beograd, 2017)
This paper reports the physicochemical (density, dynamic viscosity, electrical conductivity and refractive index) and the thermodynamic (thermal expansion coefficient, molecular volume, lattice energy and heat capacity) ...
Pyrrolizidine alkaloids from seven wild-growing Senecio species in Serbia and Montenegro / Pirolizidinski alkaloidi iz sedam samoniklih biljnih vrsta roda Senecio koje rastu u Srbiji i Crnoj Gori
(Srpsko hemijsko društvo, Beograd, 2009)
The genus Senecio (family Asteraceae) is one of the largest in the world. It comprises about 1100 species which are the rich source of pyrrolizidine alkaloids. Plants containing pyrrolizidine alkaloids are among the most ...
The HPLC determination of the content of magnoflorine in epimedium alpinum L / HPLC određivanje sadržaja magnoflorina u prevolcu, epimedium alpinum L
(Srpsko hemijsko društvo, Beograd, 2006)
The aporphine alkaloid magnoflorine, known as a constituent of Asian Epimedium species, was isolated for the first time from the wild growing European species, Epimedium alpinum L. Identification was done by comparison ...
New evidence of transient complex oscillations in a closed, well-stirred belousov-zhabotinsky system / Novozabeležene tranzijentne kompleksne oscilacije u zatvorenom belousov-žabotinski reakcionom sistemu sa dobrim mešanjem
(Srpsko hemijsko društvo, Beograd, 2006)
Some new experimental evidence of complex irregular oscillations in the Belousov-Zhabotinsky reaction realized in a batch reactor is presented. The results were obtained under relatively low cerium and malonic acid ...
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 ...