Results 211 to 220 of about 29,068 (249)

An interrelationship between heat of micelle formation and critical micelle concentration

Journal of Colloid and Interface Science, 1975
A discussion whether or not the contribution of water must be introduced into a thermodynamic equation of micellization was made on the basis of a phase separation model. As a result, an enthalpy change on micelle formation at very low CMC can be fairly approximated by the conventional expression, ΔHm = − nRT2(∂ ln CMC/∂T)p.
Yoshikiyo Moroi, Nagamune Nishikido, Hiromoto Uehara, Ryohei Matuura   +3 more
openaire   +1 more source

Critical micelle concentration of some surfactants and thermodynamic parameters of their micellization

Fluid Phase Equilibria, 2012
Abstract Measurements of density, viscosity, conductivity and light scattering of aqueous solutions of sodium dodecylsulfate (SDDS), sodium hexadecylsulfonate (SHS), sodium N-lauryl sarcosinate (SDSa), cetyltrimethylammonium bromide (CTAB), cetylpyridinium bromide (CPyB), dodecyldimethyethylammonium bromide (DDEAB), tetradecyltrimethylammonium ...
Anna Zdziennicka, Katarzyna Szymczyk, Joanna Krawczyk, Bronisław Jańczuk   +3 more
openaire   +1 more source

A fluorimetric method for the estimation of the critical micelle concentration of surfactants

Analytical Biochemistry, 1981
Abstract The present work investigates the possibility of a rapid estimation of critical micelle concentration (cmc) of surfactants by means of soluble fluorescent probes. The effect of nonionic or differently charged surfactants on the fluorescent properties of the anionic 8-anilino-1-naphtalenesulfonic acid magnesium salt (ANS) or cationic ...
DE VENDITTIS, EMMANUELE, PALUMBO G., PARLATO G., BOCCHINI V.   +3 more
openaire   +4 more sources

High-throughput evaluation of the critical micelle concentration of detergents

Analytical Biochemistry, 2011
Determination of the critical micelle concentration (CMC) value of detergents routinely used in biological applications is necessary to follow possible changes due to different buffer compositions (e.g., temperature, pH) such as those in solutions that are used for protein activity assays or crystallization. Here we report a method to determine the CMC
Thorsten, Jumpertz, Britta, Tschapek, Nacera, Infed, Sander H J, Smits, Robert, Ernst, Lutz, Schmitt   +5 more
openaire   +2 more sources

Determination of critical micelle concentration with the rotating sample system

Analytical and Bioanalytical Chemistry, 2008
A novel experimental approach using the rotating sample system (RSS) is proposed here for the determination of the critical micelle concentration (CMC) of surfactants. The RSS has been conceived in our laboratory as a convection platform for physicochemical studies and analyses in microliter-sized sample drops.
Linus T, Kao, Gautam N, Shetty, Miklós, Gratzl   +2 more
openaire   +2 more sources

Determination of critical micelle concentration of aqueous lysolecithin solutions

Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1971
Abstract The ultraviolet absorption band of o-cresol was found to shift significantly when lysolecithin micelles were present in the aqueous solution. Since this change in the spectrum is similar to the shift observed when the environment of o-cresol is changed from water to the less polar medium methanol, and since it disappears below a critical ...
E, Hamori, A M, Michaels
openaire   +2 more sources

Evidence for a Critical Micelle Concentration of Surfactants in Hydrocarbon Solvents

Langmuir, 2013
The concentration-dependent aggregation of two surfactants, anionic sodium dioctylsulfosuccinate (Aerosol OT or AOT) and nonionic pentaethylene glycol monododecyl ether (C12E5), has been studied in cyclohexane-D12 using small-angle neutron scattering (SANS).
Smith, Gregory N., Brown, Paul, Rogers, Sarah E., Eastoe, Julian   +3 more
openaire   +3 more sources

Determination of Critical Micelle Concentration by Hyper-Rayleigh Scattering

Journal of the American Chemical Society, 2003
The critical micelle concentration (CMC) of several surfactants that contain an NLO chromophore, either at the hydrocarbon tail, or at the hydrophilic headgroup, or even as a counterion, was determined by hyper-Rayleigh scattering (HRS). In all cases, the HRS signal exhibited a similar variation with surfactant concentration, wherein the CMC is ...
Ghosh, Suhrit, Krishnan, Anu, Das, Puspendu K, Ramakrishnan, S   +3 more
openaire   +2 more sources

Determination of critical micelle concentrations of Pluronics

Mendeleev Communications
Critical micelle concentrations (CMCs) of Pluronics were determined by three techniques, namely 1,6-diphenyl-1,3,5-hexatriene fluorescence, sensitization of multidrug-resistant cancer cells with Pluronic unimers and a novel technique based on the migration of fluorophore-labeled lipid from liposomes into Pluronic micelles.
Nikolai Petrovich Iakimov, Evgenii Olegovich Fomin, Nikolay Sergeevich Melik-Nubarov, Irina Dmitrievna Grozdova   +3 more
openaire   +1 more source

Determination of critical micelle concentration of surfactants by capillary electrophoresis

Journal of Chromatography A, 2004
Capillary electrophoresis (CE) has been proven to be a convenient and useful technique for the determination of the critical micelle concentration (CMC) of a surfactant in an electrophoretic system under operating conditions. In this review, methodological approaches to the determination of the CMC of surfactants by CE technique are described.
openaire   +2 more sources