02327nas a2200241   4500008004100000022001400041245015600055210006900211260007300280300001000353490000800363520136000371653002201731653004101753653003901794653002801833653003101861100001801892700001901910700001601929700001301945856012701958       2006                        eng d  a0927-775700aMicellar behavior of dodecyldimethylethyl ammonium bromide and dodecyltrimethyl ammonium chloride in aqueous media in the presence of diclofenac sodium0 aMicellar behavior of dodecyldimethylethyl ammonium bromide and d  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR  a17-250 v2783 a<p>The micellar properties of cationic surfactants (S) viz. dodecyldimethylethyl ammonium bromide (DDAB) and dodecyltrimethylammonium chloride (DTAC) in aqueous media in the presence of diclofenac sodium (D) have been investigated by spectroscopic and conductivity measurements. The UV-vis and H-1 NMR studies suggest possible packing of diclofenac sodiurn molecules in the micelles. The conductivity studies were carried out over the temperature range 288.15-308.15 K. The critical micelle concentration (cmc) and degree of counterion binding (beta) of the micelles were determined at different temperatures. Delay in micellisation was observed for both DDAB and DTAC. Thermodynamic parameters (Delta G(m)(0) Delta H-m(0) and Delta S-m(0).) for the micelle system were estimated by applying the charged pseudo-phase separation model. The results of the ternary S/D/W system were analysed in comparison with the reported results of binary SAV system. The Delta G(m)(0) values for the ternary S/D/W system in both the cases show an increase in comparison to the respective binary SAV system. However, Delta S-m(0) decreased with temperature and remained positive in both the systems. At lower temperatures, the micellisation was found to be entropy-driven while at higher temperatures it was enthalpy-dfiven. (c) 2005 Elsevier B.V. All rights reserved.</p>10adiclofenac sodium10adodecyldimethylethylammonium bromide10adodecyltrimethylammoniurn chloride10aElectrical conductivity10aspectroscopic measurements1 aMehta, S., K.1 aBhasin, K., K.1 aKumar, Anil1 aDham, S.  uhttps://library.ncl.res.in/content/micellar-behavior-dodecyldimethylethyl-ammonium-bromide-and-dodecyltrimethyl-ammonium-001973nas a2200289   4500008004100000022001400041245012800055210006900183260009500252300001200347490000800359520098400367653002301351653000801374653001701382653002901399653000901428653000901437653001701446653001501463653001401478100001801492700001101510700001901521700001601540856012701556       2008                        eng d  a0021-979700aInsight into the micellization of dodecyldimethylethylammonium bromide (DDAB) in the presence of bovine serum albumin (BSA)0 aInsight into the micellization of dodecyldimethylethylammonium b  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcJUL  a426-4340 v3233 a<p>in this work, we report the effect of concentration of bovine serum albumin (BSA) on the micellization of a cationic surfactant, doclecyldimethylethylammonium bromide (DDAB). Several samples covering a wide range of concentrations of protein and surfactant have been investigated. The interactions between the moieties are investigated by measuring fluorescence quenching of BSA molecules. The aggregation number of DDAB micelles is found to be small in the presence of BSA. The formation of DDAB-BSA complex is confirmed by FTIR. Absorbance spectroscopy indicates that at higher concentration, the conformational stability of BSA in DDAB is higher. The viscosity data for protein-surfactant systems confirm conformational changes in protein chains induced by the surfactant. The cmc values for DDAB increase with increasing concentration of BSA. At higher temperatures the micellization-complexation becomes enthalpy-dominated. (c) 2008 Elsevier Inc. All rights reserved.</p>10aAggregation number10aBSA10aconductivity10aconformational stability10aDDAB10aFFIR10afluorescence10aUV-visible10aviscosity1 aMehta, S., K.1 aBhawna1 aBhasin, K., K.1 aKumar, Anil  uhttps://library.ncl.res.in/content/insight-micellization-dodecyldimethylethylammonium-bromide-ddab-presence-bovine-serum-001734nas a2200277   4500008004100000022001400041245012200055210006900177260007300246300001200319490000800331520081700339653002801156653002301184653001701207653000901224653001001233653002001243653001401263653000901277100001801286700001101304700001901315700001601334856010601350       2009                        eng d  a0927-775700aSolubilization and conformational behavior of zein in aqueous solution of dodecyldimethylethylammonium bromide (DDAB)0 aSolubilization and conformational behavior of zein in aqueous so  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG  a195-2010 v3463 a<p>The solubilization and conformational behavior of Zein in the presence of cationic surfactant, dodecyldimethylethylammonium bromide (DDAB) have been studied. The colloidal properties of DDAB in the absence and presence of Zein have also been investigated using physico-chemical and spectroscopy methods. The surfactant appears to bind to Zein at concentrations below the critical micelle concentration (cmc) and the binding becomes weaker at concentrations above the cmc. The interaction between DDAB and Zein depends on the chemical structure and molecular parameters (conformation, molar mass, charge) of the protein. The schematic sketches of the molecular mechanisms of the complex formation between like-charged proteins and surfactants have been proposed. (C) 2009 Elsevier B.V. All rights reserved.</p>10aAbsorbance spectroscopy10aAggregation number10aconductivity10aDDAB10aFT-IR10aSurface tension10aviscosity10aZein1 aMehta, S., K.1 aBhawna1 aBhasin, K., K.1 aKumar, Anil  uhttps://library.ncl.res.in/content/solubilization-and-conformational-behavior-zein-aqueous-solution-0