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Prikaz rezultata 11-20 od 165
Substituent and solvent effects on the UV/vis absorption spectra of 3-N-alkyl-5-carboxy uracils
(Natl Inst Science Communication, New Delhi, 2003)
Absorption spectra of ten 3-N-alkyl-5-carboxy uracils are recorded in fourteen solvents in the range 200-400 nm. The absorption frequencies of carboxy carbonyl electronic transitions are correlated by dual substituent ...
Emulsion stability evaluation using fractal dimensions approach
(8th Conference of the Yugoslav Materials Research Society, 2007)
There are many developed strategies for evaluating emulsion stability, aimed at determining the life circle of emulsions. Most of them are based on rheological properties of emulsions. There are, however, very few based ...
Solvent effects on the structure-activity relationship of pharmacological active 3-substituted-5,5-diphenylhydantoins
(Springer/Plenum Publishers, New York, 2007)
Absorption spectra of eight 3-substituted-5,5-diphenylhydantoins have been recorded in fourteen solvents in the range 200-100 nm. The effect of solvent dipolarity/polarizability and solvent/solute hydrogen bonding interactions ...
Castable synthesis from dolomite and bauxite
(American Ceramic Society Bulletin, 2007)
Synthesis of substituted 3-cyano-2-pyridones: Part IV. Influence of 3-alkyl-2,4-pentanedione and N-alkyl cyanoacetamide structure on the enzyme catalyzed synthesis of substituted 3-cyano-2-pyridones
(Natl Inst Science Communication, New Delhi, 2006)
Lipase from Candida rugosa has been used to Study the influence of 3-alkyl-2,4-pentanedione and N-alkyl cyanoacetamide Structure on the enzyme catalyzed reaction of pyridone ring formation in water at 40 degrees C. Starting ...
Electrodeposition and characterization of Zn-Ni alloys as sublayers for epoxy coating deposition
(Springer, Dordrecht, 2001)
The chemical composition and phase structure of Zn-Ni alloys obtained by electrodeposition under various conditions were investigated. The influence of the deposition solution and deposition current density on the composition, ...
Immobilization of modified penicillin G acylase on Sepabeads carriers
(Versita, Warsaw, 2009)
An approach to stable covalent immobilization of chemically modified penicillin G acylase from Escherichia coli on Sepabeads(R) carriers with high retention of hydrolytic activity and thermal stability is presented. The ...
Nanoindentation of in situ polymers in hydroxyapatite/poly-L-lactide biocomposites
(Trans Tech Publications Ltd, Durnten-Zurich, 2006)
In order to obtain more accurate properties after compaction of hydroxyapatite (HAp)/poly-L-lactide (PLLA) composite, high-resolution measurement of mechanical properties method is proposed to determine the properties of ...
Solvent and substituent effect on electronic spectra of N-(4-substituted phenyl)-2,3-diphenylpropanamides
(Arkivoc, 2006)
The UV absorption spectra (200-400 nm) of eleven N-(4-substituted phenyl)-2,3-diphenyl-propanamides 1 have been recorded in fourteen solvents of different polarity. A simple Hammett equation was used to study the effects ...
Thermal stability of cordierite/silicon carbide composites after cyclic thermal shock
(Natl Inst Optoelectronics, Bucharest-Magurele, 2008)
In this paper composite material made from silicium carbide and cordierite was used in experiments. Behavior of the material in conditions of rapid temperature changes was investigated. Modified water quench test was applied ...