Results 281 to 290 of about 60,314 (313)

Interfacial properties and critical micelle concentration of lysophospholipids

Biochemistry, 1989
The critical micelle concentration (cmc) of several lysophospholipids and of a lysophospholipid analogue was determined from surface tension measurements using the maximum bubble pressure method and/or 31P NMR. The use of the maximum bubble pressure method has now been extended to micromolar concentrations of surfactant, and the experimental parameters
Edward A. Dennis, Tahsin Fanni, Richard E. Stafford   +2 more
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Confinement induced critical micelle concentration shift

The Journal of Chemical Physics, 2007
In this work, extensive lattice Monte Carlo simulations were performed to investigate the influence of confinement on critical micelle concentration (CMC). It is found that the CMC of surfactants in a confined space is shifted from its bulk value, and the shift is affected by the presence of the confining boundaries, which induces both the finite size ...
Xianren Zhang, Guang-Jin Chen, Wenchuan Wang   +2 more
openaire   +3 more sources

Observations on the critical micelle concentration of asphaltenes

Fuel, 1993
Abstract Micelle formation in petroleum fractions is discussed, including reinterpretation of recent surface tension data in terms of the Gibbs excess adsorption equation.
Simon Ivar Andersen, James G. Speight
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The critical micelle concentrations of lysophosphatidic acid and sphingosylphosphorylcholine

Chemistry and Physics of Lipids, 2004
The critical micelle concentrations (CMC) of lysophosphatidic acid (LPA) and sphingosylphosphorylcholine (SPC) were measured by isothermal titration calorimetry. The CMC of LPA decreases with salt concentration and acyl chain length. In water at 25 degrees C, the CMC values of 1-acyl-2-lyso-sn-glycero-3-phosphatidic acid are 1.850, 0.540, 0.082, and 0 ...
Robert Bittman, Evan Mintzer, Zaiguo Li
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Fluorescence probes for critical micelle concentration determination

Langmuir, 1985
The utility of pyrene and pyrene-3-carboxaldehyde as fluorescence probes for determining the critical micelle concentration (cmc) of nonionic (Tergitol25-L-9, Tergitol15-5-40, Neodol91-8), anionic (sodium decyl sulfate), and cationic (cetyltrimethylammonium bromide) surfactanb was investigated. The probes were dissolved in trace amounts (
K P Ananthapadmanabhan, N J Turro, E D Goddard, P L Kuo   +3 more
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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   +2 more sources

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
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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, Bronisław Jańczuk, Joanna Krawczyk   +3 more
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Determination of the critical premicelle concentration, first critical micelle concentration and second critical micelle concentration of surfactants by resonance Rayleigh scattering method without any probe

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2011
The purpose of this work is to determine the values of critical premicelle concentration (CPMC), first critical micelle concentration (FCMC) and second critical micelle concentration (SCMC) of surfactants using a common spectrofluorophotometer by recording resonance Rayleigh scattering (RRS) signal without any probe.
Nian Bing Li, Hong Qun Luo, Yan Shi
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   +3 more sources