Претраживање
Приказ резултата 31-40 од 106
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 ...
Determination of lisinopril in pharmaceuticals by a kinetic spectrophotometric method / Određivanje lizinoprila u farmaceutskim preparatima primenom kinetičke spektrofotometrijske metode
(Srpsko hemijsko društvo, Beograd, 2012)
A kinetic spectrophotometric method for determination of lisinopril in pharmaceuticals has been developed. The method is based on the activator action of lisinopril on Cu(II) ions catalysing the oxidation of Nile Blue A ...
Protolytic equlibria of bromazepam / Protolitičke ravnoteže bromazepama
(Srpsko hemijsko društvo, Beograd, 2002)
The protolytic equilibria of bromazepam, an ampholyte sparingly soluble in water, in homogeneous and heterogeneous systems were studied in the pH range 0–14 at 25ºC and at ionic strength of 0.1 mol/dm3 (NaCl). On the basis ...
A spectroscopic investigation of 12-tungstophosphoric acid alkali salts / Spektralno ispitivanje soli alkalnih elemenata 12-volframfosforne kiseline
(Srpsko hemijsko društvo, Beograd, 2000)
In this paper the latest results of our continuing investigation of heteropoly acids and their salts are reported. Specially attention was paid to the influence of cations on the dynamic equilibrium of protonic species, ...
Spectrochemical determination of lead in wines / Spektrohemijsko određivanje olova u vinima
(Srpsko hemijsko društvo, Beograd, 2000)
The determination of lead in wines of different origin was performed by means of atomic emission spectroscopy with argon stabilized DC. U-shaped arc and electrothermal atomic absorption spectrometry. The comparison of the ...
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 ...
Heavy metal contents in Veronica species and soil from mountainous areas in Serbia / Sposobnost akumulacije teških metala Veronica vrsta sa planinskih lokaliteta u Srbiji
(Srpsko hemijsko društvo, Beograd, 2012)
This paper describes the relationships between the concentrations of selected trace elements in soil and their bioaccumulation in the aerial parts of three Veronica species (Plantaginaceae). Plant and soil samples were ...
Structural modifications of Cu(II) 12-tungstophosphoric acid salt studied by IR and Raman spectroscopy / IR i ramanska ispitivanja strukturnih modifikacija bakarne soli 12-volframfosforne kiseline
(Srpsko hemijsko društvo, Beograd, 2000)
In this paper local processes and structural phase transformations of the copper salt of 12-tungstophosphoric acid are investigated. The structural phase transformations were followed through bands, characteristic for the ...
Spectroscopic properties and antimicrobial activity of dioxomolybdenum(VI) complexes with heterocyclic S,S'-ligands / Spektroskopska svojstva i antimikrobna aktivnost dioksomolibden(VI) kompleksa sa heterocikličnim S,S'-ligandima
(Srpsko hemijsko društvo, Beograd, 2012)
Five new dioxomolybdenum(VI) complexes of the general formula [MoO2(Rdtc)2], 1-5, where Rdtc- refer to piperidine (Pipdtc), 4-morpholine (Morphdtc), 4-thiomorpholine (Timdtc), piperazine (Pzdtc) or N-methylpiperazine ...
Rheological and droplet size analysis of W/O/W multiple emulsions containing low concentrations of polymeric emulsifiers / Određivanje reoloških karakteristika i veličine kapi W/O/W višestrukih emulzija dobijenih pri niskoj koncentraciji polimernih emulgatora
(Srpsko hemijsko društvo, Beograd, 2009)
Multiple emulsions are complex dispersion systems which have many potential applications in pharmaceutics, cosmetics and the food industry. In practice, however, significant problems may arise because of their thermodynamic ...