Results 171 to 180 of about 3,006 (211)
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Thermodynamic properties of pentanol in dodecyltrimethylammonium bromide aqueous solutions
Colloids and Surfaces, 1989Abstract Pentanol in dodecyltrimethylammonium bromide (DTAB) aqueous solutions was investigated extensively in the course of our studies of the thermodynamic properties of micellar solutions. Volumes, heat capacities and enthalpies of solution, and dilution and mixing as a function of the surfactant concentration were then rationalized in terms of ...
R. De Lisi, S. Milioto
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The Journal of Physical Chemistry B, 2011
DNA compaction induced by dodecyltrimethylammonium bromide (DTAB) is studied using atomic force microscopy (AFM) and magnetic tweezers. The morphology of DNA-DTAB complex is dependent on the DTAB concentration and incubation time. With magnesium ions, the complexes show rod- and network-like structures after approximately 5 min of incubation at low ...
Shi-Yong, Ran +3 more
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DNA compaction induced by dodecyltrimethylammonium bromide (DTAB) is studied using atomic force microscopy (AFM) and magnetic tweezers. The morphology of DNA-DTAB complex is dependent on the DTAB concentration and incubation time. With magnesium ions, the complexes show rod- and network-like structures after approximately 5 min of incubation at low ...
Shi-Yong, Ran +3 more
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Dodecyltrimethylammonium bromide in water-urea mixtures: structure and energetics
The Journal of Physical Chemistry, 1992Enthalpies of dilution and osmotic coefficients of dodecyltrimethylammonium bromide (DTAB)-water-urea mixtures as functions of urea (m u ) and surfactant (m g ) concentrations were measured at 298 and 310 K. Small-angle neutron scattering (SANS) measurements were also performed on some DTAB-D 2 O-urea mixtures at two surfactant concentrations and ...
E. Caponetti +5 more
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Polymer, 2002
The polymerization of vinyl acetate in microemulsions stabilized with dodecyltrimethylammonium bromide (DTAB), cetyltrimethylammonium bromide (CTAB) or mixture of these surfactants is examined. The polymerization rate diminishes as the surfactant mixture becomes richer in DTAB.
M Gómez-Cisneros +6 more
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The polymerization of vinyl acetate in microemulsions stabilized with dodecyltrimethylammonium bromide (DTAB), cetyltrimethylammonium bromide (CTAB) or mixture of these surfactants is examined. The polymerization rate diminishes as the surfactant mixture becomes richer in DTAB.
M Gómez-Cisneros +6 more
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Thermodynamics of the interaction between n-dodecyltrimethylammonium bromide and catalases
Thermochimica Acta, 1989Abstract The thermodynamic parameters for the interaction of the cationic detergent n -dode-cyltrimethylammonium bromide (DTAB) with bovine liver catalase at pH 3.2, 6.4 and 10.0 and with Aspergillus niger catalase at pH 10.0 have been measured at 25° C by a combination of equilibrium dialysis to determine the Gibbs energies of detergent binding ...
A.A. Mosavi-Movahedi +2 more
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Interactions between Methacrylic Acid/Ethyl Acrylate Copolymers and Dodecyltrimethylammonium Bromide
The Journal of Physical Chemistry B, 2003The interactions between dodecyltrimethylammonium bromide (DoTab) and methacrylic acid/ethyl acrylate copolymers were studied using isothermal titration calorimetry (ITC) and laser light scattering (LLS) techniques. Individual cationic surfactant molecules first bind to negatively charged carboxylate groups on the polymer chains due to electrostatic ...
C. Wang +3 more
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2023
Introduction: When creating pharmaceutical drug formulations, the active ingredient's poor solubility can occasionally cause issues. In terms of solubilization properties, binary or multicomponent surfactant mixtures can have improved characteristics and a greater capacity for solubilisation than monocomponent surfactant solutions.
Pilipović, Ana +4 more
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Introduction: When creating pharmaceutical drug formulations, the active ingredient's poor solubility can occasionally cause issues. In terms of solubilization properties, binary or multicomponent surfactant mixtures can have improved characteristics and a greater capacity for solubilisation than monocomponent surfactant solutions.
Pilipović, Ana +4 more
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Journal of Solution Chemistry, 2017
The densities of aqueous solutions of mixed surfactants of dodecyltrimethylammonium bromide and 1-dodecyl-3-methylimidazolium bromide (DTAB/C12mimBr) were measured at various compositions. The concentration dependent apparent molar volumes of these mixed surfactants were calculated and used to deduce the critical micelle concentrations (cmc) and the ...
Peizhu Zheng, Changfei Du, Weiguo Shen
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The densities of aqueous solutions of mixed surfactants of dodecyltrimethylammonium bromide and 1-dodecyl-3-methylimidazolium bromide (DTAB/C12mimBr) were measured at various compositions. The concentration dependent apparent molar volumes of these mixed surfactants were calculated and used to deduce the critical micelle concentrations (cmc) and the ...
Peizhu Zheng, Changfei Du, Weiguo Shen
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The Journal of Chemical Thermodynamics, 2017
Abstract The mixed surfactants of dodecyltrimethylammonium bromide (DTAB) and 1-dodecyl-3-methylimidazolium bromide (C 12 mimBr) in aqueous solutions were studied by measurement of electrical conductivity and isothermal titration microcalorimetry (ITC).
Peizhu Zheng +3 more
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Abstract The mixed surfactants of dodecyltrimethylammonium bromide (DTAB) and 1-dodecyl-3-methylimidazolium bromide (C 12 mimBr) in aqueous solutions were studied by measurement of electrical conductivity and isothermal titration microcalorimetry (ITC).
Peizhu Zheng +3 more
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Solubilization of spiropyran in aqueous NaBr solutions of dodecyltrimethylammonium bromide
Colloids and Surfaces, 1992Abstract 1,3,3-Trimethylindolino-6′-nitrobenzopyrilospiran is solubilized in aqueous NaBr solutions of dodecyltrimethylammonium bromide (DTAB). The dye is soluble in solutions of DTAB having concentrations higher than the critical micelle concentration.
Shoichi Ikeda, Yoko Saso
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