Претраживање
Приказ резултата 1-10 од 1040
Isopiestic determination of the osmotic and activity coefficients of the {yKCl + (1-y)K2HPO4}(aq) system at T=298.15 K
(Academic Press Ltd- Elsevier Science Ltd, London, 2011)
The osmotic coefficients of aqueous mixtures of KCl and K2HPO4 have been measured at T = (298.15 +/- 0.01) K by the isopiestic vapor pressure method over the range of ionic strengths from (2.3700 to 11.250) mol . kg(-1) ...
In situ radical polymerization of methyl methacrylate in a solution of surface modified TiO2 and nanoparticles
(Pergamon-Elsevier Science Ltd, Oxford, 2007)
Surface modified TiO2 nanoparticles dissolved in toluene were encapsulated in PMMA by in situ radical polymerization of methyl methacrylate initiated by 2,2'-azobisisobutyronitrile. The surface modification of the TiO2 ...
A highly efficient diastereoselective synthesis of alpha-isosalicin by maltase from Saccharomyces cerevisiae
(Elsevier Sci Ltd, Oxford, 2011)
In this report, alpha-isosalicin, a potent anticoagulant and skin whitening agent, was synthesized by a highly efficient chemoselective and diastereoselective reaction, catalyzed by maltase from bakers' yeast (Saccharomyces ...
The problems in design and detailed analyses of energy consumption for biodiesel synthesis at supercritical conditions
(Elsevier, Amsterdam, 2009)
The main goal of this study is analysis the existing and recently published data related to design of larger scale plant for biodiesel synthesis at supercritical conditions. Such analysis was focused on the problem of ...
Substituent and solvent effects on the UV/Vis absorption spectra of 5-(4-substituted arylazo)-6-hydroxy-4-methyl-3-cyano-2-pyridones
(Elsevier, Amsterdam, 2004)
Absorption spectra of ten 5-(4-substituted arylazo)-6-hydroxy-4-methyl-3-cyano-2-pyridones have been recorded in fifteen solvents in the range 200-600 nm. The substituents at the phenyl nucleus are as follows: OH, OCH3, ...
Structural changes in the fabrication and ageing of PA66 textured yarn
(Wiley-VCH Verlag Gmbh, Weinheim, 2005)
The characterization of textured yarn is of great significance for both producers and final users. The influence of the texturing parameters (draw ratio and heater temperature) on the characteristics of the textured polyamide ...
The synthesis of ultrafine and nanocomposite powders based on copper, silver anal alumina
(Kovove Materialy, 2006)
Contemporary materials with predetermined properties can be successfully synthesized by utilizing the principles of hydrometallurgy and powder metallurgy. The results of developing a new procedure for the synthesis of ...
Multivariate analyses of microelement contents in wheat cultivated in Serbia (2002)
(Elsevier Sci Ltd, Oxford, 2007)
Microelements in soft winter wheat grain samples collected from all over Serbian wheat growing regions were analyzed quantitatively by atomic absorption spectrophotometry. Microelement contents differed markedly among wheat ...
Synthesis of nanostructured mullite from xerogel and aerogel obtained by the nonhydrolytic sol-gel method
(Pergamon-Elsevier Science Ltd, Oxford, 1999)
Synthesis and nanostructure evolution of mullite (3Al(2)O(3).2SiO(2)) from xero- and aerogels, obtained by the non-hydrolytic sol-gel process are described. Mullite crystallization and gel nanostructure evolution after ...
Studies on oxidative modifications of cellulose in the periodate system: Molecular weight distribution and carbonyl group profiles
(Walter de Gruyter & Co, Berlin, 2007)
The effects of periodate oxidation on cellulose were studied by means of gel permeation chromatography (GPC) using multiple detection and carbonyl-selective fluorescence labeling according to the CCOA methodology profiling ...