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Приказ резултата 31-40 од 211
Enhancement of the electrochemical reduction of oxygen at platinum by nickel underpotential deposition
(Springer, New York, 2006)
Polycrystalline Pt electrode was modified by underpotential deposition (upd) of nickel. The modification was performed by potential cycling in phosphate buffer pH 7. 0 containing NiSO4, in which hydrogen and nickel upd ...
Synthesis of new hyperbranched urethane-acrylates and their evaluation in UV-curable coatings
(Elsevier Science Sa, Lausanne, 2004)
Three series of hyperbranched urethane-acrylates (HB-UA), based on aliphatic hyperbranched polyesters and polyethyleneglycol acrylate, were prepared and evaluated for use in UV-curable coatings. UV-curing kinetics were ...
The study of corrosion stability of organic epoxy protective coatings on aluminium and modified aluminium surfaces
(Soc Brasileira Quimica, Sao Paulo, 2005)
Epoxy coatings were formed by cathodic electrodeposition of an epoxy resin on aluminium and modified aluminium surfaces (phosphatized, chromatized-phosphatized and anodized aluminium) using a constant voltage method (resin ...
Synthesis and characterization of biodegradable poly(butylene succinate-co-butylene adipate)s
(Elsevier Sci Ltd, Oxford, 2001)
A series of high molecular weight polyesters, poly(butylene succinate-co-butylene adipate)s was prepared from dimethyl succinate, dimethyl adipate and 1,4-butanediol by catalyzed transesterification in the melt. The ...
Temperature dependence of densities and excess molar volumes of the ternary mixture (1-butanol plus chloroform plus benzene) and its binary constituents (1-butanol plus chloroform and 1-butanol plus benzene)
(Springer/Plenum Publishers, New York, 2008)
Densities rho of the 1-butanol + chloroform + benzene ternary mixture and the 1-butanol + chloroform and 1-butanol + benzene binaries have been measured at six temperatures (288.15, 293.15, 298.15, 303.15, 308.15, and ...
Trace elements analysis of Echinacea purpurea - herbal medicinal
(Elsevier, Amsterdam, 2003)
Elemental composition of Echinacea purpurea (Asteracae), grown in Serbia under strongly controlled conditions, has been studied. To distinguish elemental patterns of different parts of the plant, the content of Zn, Fe, Cu, ...
Linear free energy relationships of the H-1 and C-13 NMR chemical shifts of 3-methylene-2-substituted-1,4-pentadienes
(Elsevier Science Bv, Amsterdam, 2005)
Linear free energy relationships (LFER) were applied to the H-1 and C-13 NMR chemical shifts (delta(N), N=H-1 and C-13, respectively) in the unsaturated backbone of cross-conjugated trienes 3-methylene-2-substituted-1,4- ...
Biosynthesis of ethyl caproate and other short ethyl esters catalyzed by cutinase in organic solvent
(Elsevier Science Bv, Amsterdam, 2009)
The main objective of this work was to study the enzymatic synthesis of short chain ethyl esters, a group of relevant aroma molecules, by Fusarium solani pisi cutinase in an organic solvent media (iso-octane), and to assess ...
The effect of substrate polarity on the lipase-catalyzed synthesis of aroma esters in solvent-free systems
(Elsevier, Amsterdam, 2007)
The aim of this study was to compare activities of commercial lipases in synthesis of various esters in solvent-free system and in isooctane. Moreover, the effect of substrate polarity (expressed as log P) on solvent-free ...
Carbon-13 substituent chemical shifts in N-1-p-substituted phenyl-5-methyl-4-carboxy uracils
(Elsevier Science Bv, Amsterdam, 2007)
The C-13 NMR chemical shifts of seven N-1-p-substituted phenyl-5-methyl-4-carboxy uracils have been measured in deuterated dimethyl sulfoxide (DMSO-d sigma). The correlation analysis for the substituent-induced chemical ...