Претраживање
Приказ резултата 61-70 од 255
Local heat transfer coefficients during the evaporation of 1,1,1,2-tetrafluoroethane (R-134a) in a plate heat exchanger / Lokalni koeficijenti prelaza toplote pri isparavanju 1,1,1,2-tetrafluoretana (R-134a) u pločastom razmenjivaču toplote
(Serbian Chemical Society, Belgrade, 2009)
The evaporation heat transfer coefficient of the refrigerant R-134a in a vertical plate heat exchanger was investigated experimentally. The area of the plate was divided into several segments along the vertical axis. For ...
Mathematical modeling and simulation of gel drying with supercritical carbon dioxide / Matematičko modelovanje i simulacija sušenja gela sa natkritičnim ugljen-dioksidom
(Serbian Chemical Society, Belgrade, 2005)
Mathematical models of alumina/silica gel supercritical drying with carbon dioxide were studied using supercritical drying experimental data. An alumina/silica gel with zinc chloride was synthesized and dried with ...
The devitrification of PbO-B2O3-ZnO glass doped with Li2O / Rastakljivanje PbO-B2O3-ZnO stakla sa dodatkom Li2O
(Serbian Chemical Society, Belgrade, 2000)
In this paper the effect of the addition of Li2O on the crystallization behavior of PbO-B2O3-ZnO glass was investigated by the differential thermal analysis (DTA) and X-ray powder diffraction (XRPD) methods. The crystallization ...
Characterization and degradation of pectin derived from Budimka apple / Degradacija i karakterizacija pektina jabuke sorte budimka
(Serbian Chemical Society, Belgrade, 2008)
The characterization of apple pectin and its oligogalacturonic fractions derived from the autochthones apple variety Budimka, characteristic for central Serbia, is described in this paper. After extraction, the apple pectin ...
Effect of fermentation conditions on lipase production by Candida utilis / Uticaj uslova fermentacije na produkciju lipaze iz Candida utilis
(Serbian Chemical Society, Belgrade, 2007)
A wild yeast strain isolated from spoiled soybean oil and identified as Candida utilis initially presented rather low lipase activity (approximately 4 IU dm-3) in submerged culture in a universal yeast medium containing 2 ...
Thermodynamic and structural investigation of the Ag-In-Sb system
(Croatian Metallurgical Society, 2007)
The Ag-In-Sb ternary system presents one of the possible lead-free solder candidates. Therefore, the results of thermodynamic study of the alloys in the Ag-In-Sb alloys, obtained using general solution mode!, are presented ...
Magnetic properties of ND Rich Melt-Spun ND-FE-B alloy
(International Institute for the Science of Sintering, Beograd, 2005)
As a part of these experimental investigations of melt-spun Nd-Fe-B alloy with Nd rich content in relation to Nd2Fe14B prepared by rapid quenching process for optimally selected cooling rate and heat treatment, the influence ...
Alkylation of N-substituted 2-phenylacetamides: Benzylation of N-(4-nitrophenyl)-2-phenylacetamide / Alkilovanje N-supstituisanih 2-fenilacetamida - benzilovanje N-(4-nitrofenil)-2-fenilacetamida
(Serbian Chemical Society, Belgrade, 2002)
N-(4-Nitrophenyl)-2-phenylacetamide was alkylated with benzyl chloride in the presence of powdered potassium hydroxide at different temperatures and in various solvents in order to establish the reactivity and orientation ...
Alkylation of N-substituted-2-phenylacetamides / Alkilovanje n-supstituisanih 2-fenilacetamida
(Serbian Chemical Society, Belgrade, 2004)
Various N-substituted phenylacetamides were alkylated using different alkylating agents under neutral and basic conditions. Reactions were performed at different reaction temperatures and in various solvents. Also, a number ...
Effects of solvent and structure on the reactivity of 6-substituted nicotinic acids with diazodiphenylmethane in aprotic solvents / Uticaj rastvarača i strukture na reaktivnost 6-supstituisanih nikotinskih kiselina sa diazodifenilmetanom u aprotičnim rastvaračima
(Serbian Chemical Society, Belgrade, 2009)
The rate constants for the reactions of diazodiphenylmethane (DDM) with 6-substituted nicotinic acids in aprotic solvents at 30°C were determined. The obtained second order rate constants in aprotic solvents, together with ...