Journal ArticleDOI
Proton transfer complexing equilibrium in micellar solution
Satya P. Moulik,S. Ray,A. R. Das +2 more
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In this article, the proton transfer complexing equilibrium in aqueous media between p-nitrosalicylic acid and ethylenediamine has been studied in presence of CTAB, SDS, TX-100 and PEG.Abstract:
Proton transfer complexing equilibrium in aqueous media between p-nitrosalicylic acid and ethylenediamine has been studied in presence of CTAB, SDS, TX-100 and PEG, where CTAB and SDS have been observed to enhance the reaction whereas, TX-100 and PEG have suppressed it. Salts like KCl and NaCl have got antagonistic effects on the activities of CTAB and SDS. The proton transfer phenomenon can help determining the cmc of the additives. The equilibrium constants of the process have been determined and the standard thermodynamic parameters, ΔH°, JG' andΔ S° have been derived. The process has shown ‘isothermodynamic’ linear enthalpy-entropy relationship.read more
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Journal ArticleDOI
Visible and fluorescence spectral studies on the interaction of safranine T with surfactant micelles
TL;DR: In this paper, the visible spectra of safranine T in micellar solutions indicate 1:1 (dye to micelle) charge transfer complex formation with the non-ionic surfactants Triton X 100 (TX 100), Tween 20, Tween 40 and Tween 60.
Journal ArticleDOI
Effects of urea and a nonionic surfactant on the micellization and counterion binding properties of cetyltrimethyl ammonium bromide and sodium dodecyl sulfate
P. K. Das Gupta,Satya P. Moulik +1 more
TL;DR: In this paper, the effect of urea and polyoxyethylene sorbitan monolaurate (PSML) on CTAB micelles was investigated in the presence of a nonionic surfactant.
Journal ArticleDOI
Cholesterol solubility in mixed micellar solutions of ionic and non-ionic surfactants.
Swapna Pal,S. P. Moulik +1 more
TL;DR: Solubility of cholesterol was found to bear a direct correlation with the total lipid content and the free energy, enthalpy, and entropy of solution were determined.
Book ChapterDOI
Interaction of Cetyltrimethylammonium Bromide with Sodium Dodecyl-Sulfate in Electrolyte and Nonelectrolyte Environments
A. B. Mandal,S. P. Moulik +1 more
TL;DR: In this paper, the interaction between cetyltrimethylammonium bromide (CTAB) and sodium dodecylsulfate (SDS) at levels below and above their critical micelle concentrations (CMCs) in aqueous medium and in the presence of additives like NaCl, glucose, urea, p-tert-alkyl-phenoxypolyoxyethyleneether(Triton X 100), polyoxyethylenesorbitanmonolaurate(Tween 20) and polyethyleneglycol (M
Journal ArticleDOI
Energetics of the interaction of d-fructose and d-glucose with sodium hydroxide in aqueous ethyl alcohol, acetone, and 1,4-dioxane media
Satya P. Moulik,Dipti Basu +1 more
TL;DR: In this article, it has been shown that, at 303 K, 1,4-dioxane, acetone, and ethyl alcohol can completely stop the association process between d-glucose and NaOH at dielectric constants of 522, 446, and 535, respectively, whereas the respective dielectoric constants of the solvents required for completely stopping the association between d -fructose and NaHO are 546, 470, and 550 at equidielectric levels, the changes in free energy for the binding process are more
References
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Book
Critical Micelle Concentrations of Aqueous Surfactant Systems
TL;DR: The literature has been scanned for numerical values from 1926 up to and including 1966 and over 800 values, hitherto available in graphical form or implied in experimental data, have been extracted from the publications and are included Close to 5,000 entries, based on 333 references, dealing with 720 compounds are tabulated in the main tables Whenever available, the temperature, any additives present, the method of determination and the literature source are given for each CMC value and an indication of the apparent quality of the preparation and method used are included as mentioned in this paper.
Journal ArticleDOI
Enthalpy-entropy compensation phenomena in water solutions of proteins and small molecules: a ubiquitous property of water.
Rufus Lumry,Shyamala Rajender +1 more
TL;DR: It is tentatively concluded that the pattern is real, very common and a consequence of the properties of liquid water as a solvent regardless of the solutes and the solute processes studied, and that liquid water plays a direct role in many protein processes and may be a common participant in the physiological function of proteins.
Journal ArticleDOI
Effect of protein denaturation on micelle stability.
Walter Gratzer,Gilbert H. Beaven +1 more
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Interaction of p-nitrosalicylic acid with ethylenediamine in presence of cetyltrimethylammonium bromide, sodium dodecyl sulfate, Triton X 100, polyethylene glycol, and their binary mixtures. A proton donor-acceptor equilibrium in micellar solution
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