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Приказ резултата 31-40 од 68
Preparation of thermoplastic starch
(Serbian Chemical Society, Belgrade, 1997)
Native starch and WX-starch, i.e., native starch enriched with amylopectin, were mixed with plasticizers and thermomechanically treated in a twin screw mixer in order to obtain thermoplastic starch. Ethylene glycol, propane ...
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 ...
The effect of deposition process exchange current density on the thin metal film formation on inert substrate
(Serbian Chemical Society, Belgrade, 1997)
The initial stage of thin surface metal film formation on inert substrate is considered. The simultaneous action of both active centers and nucleation exclusion zones was taken into consideration when discussing the ...
Ion exchange of synthetic zeolite A with Cr(III) ions
(Serbian Chemical Society, Belgrade, 1997)
A series of chromium-exchanged zeolite A was prepared by ion-exchange using very dilute solution of a chromium(III) salt. The chromium(III) ions can replace up to 40% sodium cations. A significant lattice decomposition was ...
Behaviour of lipase immobilized on Amberlite IRA-410 / Ponašanje lipaze imobilisane na Amberlitu IRA-410
(Srpsko hemijsko društvo, 1990)
Two different lipases were immobilized on the strongly basic ion-exchange resin Amberlite IRA-410 in its Cl form and used to hydrolyse n-butylacetate. Opera¬tional stability and dependence of the rate on substrate concentration ...
Rerafinacija otpadnih mineralnih transformatorskih ulja
(Savez energetičara Jugoslavije, Beograd, 1999)
Different physical and chemical processes taking place in the transformer or transformer insulation system, are influencing the decrease in the insulating oil quality. After certain period of time, the oil cannot meet the ...
Analysis of mass transfer in beer dialysis and diafiltration with two different membranes
(Serbian Chemical Society, Belgrade, 1996)
Experimental investigation of selective alcohol removal from beer by dialysis and dialysis with transmembrane pressure (diafiltration), using two different hollow-fiber membranes: Cuprophan (regenerated cellulose) and ...
Solvent effects on electronic absorption spectra of 3-N-(4-substituted-phenyl)-5-carboxy uracils
(Serbian Chemical Society, Belgrade, 1999)
Absorption spectra of some 3-N-(4-substituted phenyl)-5-carboxy uracils (substiuents: H, Cl, Br, I, Me, Et, OMe, COOH and NO2) were recorded in twelve solvents in the range 200-400 nm. The effects of solvent polarity and ...
Modeling of drawing thin glass sheet from a preform
(Serbian Chemical Society, Belgrade, 1998)
A one-dimensional model of thin glass sheet drawing has been developed. This model includes momentum, heat and mass balance equations. The density, viscosity and specific heat of the glass were calculated as functions of ...