Browsing by Subject "Solutions"
Now showing items 1-20 of 47
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A novel QSPR model for predicting θ (lower critical solution temperature) in polymer solutions using molecular descriptors
(2007)In this study, we present a new model that has been developed for the prediction of θ, (lower critical solution temperature) using a database of 169 data points that include 12 polymers and 67 solvents. For the characterization ...
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Activated biochar derived from cactus fibres - Preparation, characterization and application on Cu(II) removal from aqueous solutions
(2014)The adsorption efficiency of activated biochar prepared from cactus fibres regarding the removal of Cu(II) from aqueous solutions has been investigated as a function of various physicochemical parameters (e.g. pH, initial ...
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Chemistry of 4-dicyanomethylene-1,2,6-thiadiazines
(2000)The chlorine atoms in 3,5-dichloro-4-dicyanomethylene-1,2,6-thiadiazine 1 are readily displaced by thiophenols in the presence of Hünig's base, the first at -78 °C and the second at 20 °C to give the orange mono- and ...
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Competitive sorption of Cu(II) and Eu(III) ions on olive-cake carbon in aqueous solutions - A potentiometric study
(2010)The competitive sorption of Cu(II) and Eu(III) ions from aqueous solutions by olive-cake carbon, has been investigated by potentiometry at pH 6, I = 0.1 M NaClO4, 25°C and under normal atmospheric conditions. Evaluation ...
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Conformal mapping for the efficient MFS solution of Dirichlet boundary value problems
(2008)In this work, we use conformal mapping to transform harmonic Dirichlet problems of Laplace's equation which are defined in simply-connected domains into harmonic Dirichlet problems that are defined in the unit disk. We ...
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Dynamic responses in nanocomposite hydrogels
(2006)The shear response of a series of polymer-clay gels has been investigated by means of rheology and small-angle neutron scattering (SANS). The gels have the same composition by mass but different polymer molecular weights ...
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The effects of the use of weak organic acids on the improvement of oxygen storage and release properties of aged commercial three-way catalysts
(2005)The efficiency of weak organic acid solutions for improving the oxygen storage and release properties of aged commercial three-way catalysts (TWC) has been investigated. For the first time, three candidate leaching solutions, ...
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Equation of state for star polymers in good solvents
(2000)A free-energy model for star polymers was developed in good solvents that accurately describes concentrated polymer solutions and displays the correct universal scaling behaviour, in the limit of infinite molecular weight, ...
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Evaluation of novel, cationic electrospun microfibrous membranes as adsorbents in bacteria removal
(2015)Electrospun microfibrous membranes comprised of poly(methyl methacrylate)-poly((2-diethylamino)ethyl methacrylate) random copolymers (PMMA-co-PDEAEMA) of various chemical compositions blended together with a commercially ...
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Evaluation of novel, cationic electrospun microfibrous membranes as adsorbents in bacteria removal
(2015)Electrospun microfibrous membranes comprised of poly(methyl methacrylate)-poly((2-diethylamino)ethyl methacrylate) random copolymers (PMMA-co-PDEAEMA) of various chemical compositions blended together with a commercially ...
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Article
Formation mechanism of nanotubes comprising layers of PbS nanoparticles in polymer-surfactant solutions
(2006)The crystallization of PbS in aqueous solutions containing the surfactant sodium dodecyl sulfate (SDS) and hydrophilic polymers resulted in a novel type of metastable nanotubes, the walls of which consist of layers of ...
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Free energy simulations: The meaning of the individual contributions from a component analysis
(1994)A theoretical analysis is made of the decomposition into contributions from individual interactions of the free energy calculated by thermodynamic integration. It is demonstrated that such a decomposition, often referred ...
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Article
From colloidal aggregates to layered nanosized structures in polymer-surfactant systems. 1. Basic phenomena
(2001)In this work, we examine the rich crystallization behavior that occurs in PbII/S-II/poly(ethylene oxide) (PEO)/sodium dodecyl sulfate (SDS) systems, in which the anionic surfactant interacts strongly with the polymer ...
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Helix formation by alanine-based peptides in pure water and electrolyte solutions: Insights from molecular dynamics simulations
(2013)Specific ion effects on oligopeptide conformations in solution are attracting strong research attention, because of their impact on the protein-folding problem and on several important biological-biotechnological applications. ...
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Helix formation by alanine-based peptides in pure water and electrolyte solutions: Insights from molecular dynamics simulationsAAA
(2013)Specific ion effects on oligopeptide conformations in solution are attracting strong research attention, because of their impact on the protein-folding problem and on several important biological-biotechnological applications. ...
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Hydrophilic cationic star homopolymers based on a novel diethanol-n-methylamine dimethacrylate cross-linker for sirna transfection: Synthesis, characterization, and evaluation
(2011)Four cationic hydrophilic star homopolymers based on the novel hydrophilic, positively ionizable cross-linker bis(methacryloyloxyethyl)methylamine (BMEMA) were synthesized using sequential group transfer polymerization ...
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Is vanadate reduced by thiols under biological conditions? Changing the Redox potential of V(V)/V(IV) by complexation in aqueous solution
(2010)Although dogma states that vanadate is readily reduced by glutathione, cysteine, and other thiols, there are several examples documenting that vanadium(V)-sulfur complexes can form and be observed. This conundrum has ...
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Magnetoresponsive polymer networks as adsorbents for the removal of U(VI) ions from aqueous media
(2017)Magnetoresponsive, methacrylate-based 3D polymer networks containing hydrophilic/thermoresponsive, hydrophilic/pH-responsive and hydrophobic/metal chelating functionalities and oleic acid-coated magnetite nanoparticles, ...
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Multi-compartment unimolecular micelles from (ABC)n multi-arm star triblock terpolymers
(2007)Four linear and four star equimolar terpolymers based on non-ionic hydrophilic methoxy hexa(ethylene glycol) methacrylate, ionizable hydrophilic 2-(dimethylamino)ethyl methacrylate and neutral hydrophobic methyl methacrylate ...
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On the actinic wavelength dependence of OClO photochemistry in solution
(2003)The role of actinic wavelength in OClO photochemistry was explored using femtosecond pump-probe spectroscopy. Specifically, the evolution of optical density was monitored at probe wavelengths from 267 to 900 nm following ...