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Some aspects of the quantitative analysis of cyclic nucleotides by fast-atom bombardment mass spectrometry
(Serbian Chemical Society, Belgrade, 1996)
The possibilities of the quantitative analysis of cyclic nucleotides by fast-atom bombardment are examined. Aspects such as the amount of matrix, the formation of protonatcd ion species and the presence of more than one ...
The flow of Newtonian and drag-reducing fluids around sphere
(Serbian Chemical Society, Belgrade, 1996)
The flow around a sphere placed coaxially in a cylindrical tube, the separation of the boundary layer and the wake shedding phenomena are investigated. The results of the simultaneous determination of the drag coefficients ...
Immobilization of lipase on a hydrophobic zeolite type Y
(Serbian Chemical Society, Belgrade, 1998)
Lipase from Candida cylindracea was immobilized by adsorption on a hydrophobic zeolite type Y. The maximal amount of bound protein of 8.2 mg g(-1) and an immobilization efficiency of 33% were achieved under optimum conditions. ...
Glycidyl esters synthesis catalysed by ion-exchange resins
(Serbian Chemical Society, Belgrade, 1996)
Ion-exchange resins not previously used for this purpose were employed to study the synthesis of glycidyl esters. The reaction was carried out both with free acids and their sodium salts. The model reaction was the synthesis ...
Thermal investigation of some chelate Ni(II) complexes
(Serbian Chemical Society, Belgrade, 1999)
Several diamine-nickel(II) complexes have been prepared and the kinetic parameters of their decomposition reactions investigated. The complexes undergo a gradual thermal decomposition. First, water is lost, followed by the ...
On the determination of copper in its phthalocyanine complex
(Journal of the Serbian Chemical Society, 1993)
A convenient method for copper analysis in copper phthalocyanine and its ring-substituted derivates has been studied. It is based on the complete destruction of the organic component in the sample by a combination of thermal ...
(31)P NMR investigation of some microporous zincophosphates
(Serbian Chemical Society, 1996)
High field magic-angle spinning (MAS) (31)P-NMR investigations of novel porous zincophosphates and their cobalt-containing derivatives confirm the framework structure of alternating Zn(Co)O4 and PO4 tetrahedra. The MAS NMR ...
On the possibility of the direct preparation of the sodium salt of copper phthalocyanine-4-sulfonic acid
(Serbian Chemical Society, 1994)
The reaction of a 1:3 molar mixture of the monosodium salt of 4-sulfophthalic acid and phthalic acod, carried out in the presence of NH4Cl, urea, CuSO4 5H2O, and (NH4)2MoO4, does not yield the mono-substituted derivative, ...
Alkylation of N-ethyl-2-phenylacetamide with benzyl halides
(Serbian Chemical Society, Belgrade, 1996)
Alkylations of N-ethyl-2-phenylacetamide with benzyl halides (chloride, bromide and iodide) in the presence of powdered KOH were carried out in order to establish the possible reaction products as well as to ascertain ...
Substituent effect on C=O stetching vibrations in N-substituted 2-phenylacetamides
(Serbian Chemical Society, Belgrade, 1997)
The infrared spectra have been recorded for the N-substituted 2-phenylacetamides. The effect of substitutents on the spectral characteristics of the C=O group was investigated. When the electron-releasing substitutents are ...