Results 131 to 140 of about 990 (174)

The aqueous catanionic system sodium perfluorooctanoate–dodecyltrimethylammonium bromide at low concentration

Journal of Colloid and Interface Science, 2007
The interaction between sodium perfluorooctanoate (SPFO) and dodecyltrimethylammonium bromide (DTAB) was studied by several methods and it was found strongly synergistic. Above a mole fraction of SPFO in the surfactant mixture (alpha(SPFO))=0.38, the interaction is repulsive and increases with the content of SPFO in both, the overall mixture and ...
José Luis, López-Fontán, Elena, Blanco, Juan M, Ruso, Gerardo, Prieto, Pablo C, Schulz, Félix, Sarmiento   +5 more
openaire   +2 more sources

Thermodynamics of the interaction between n-dodecyltrimethylammonium bromide and catalases

Thermochimica Acta, 1989
Abstract 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, G. Pilcher, M.N. Jones   +2 more
openaire   +1 more source

Interactions between Methacrylic Acid/Ethyl Acrylate Copolymers and Dodecyltrimethylammonium Bromide

The Journal of Physical Chemistry B, 2003
The 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, K. C. Tam, R. D. Jenkins, C. B. Tan   +3 more
openaire   +1 more source

ANALYSES OF BINARY AND TERNARY MICELLAR SYSTEMS OF HEXADECYLTRIMETHYLAMMONIUM BROMIDE, DODECYLTRIMETHYLAMMONIUM BROMIDE AND SODIUM DEOXYCHOLATE

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, Vapa, Ivana, Tepavčević, Vesna, Puača, Gorana, Poša, Mihalj   +4 more
openaire   +1 more source

Volumetric Studies on Aqueous Solutions of Dodecyltrimethylammonium Bromide and 1-Dodecyl-3-methylimidazolium Bromide

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
openaire   +1 more source

Thermodynamic properties of mixed surfactants of dodecyltrimethylammonium bromide and 1-dodecyl-3-methylimidazolium bromide

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, Dongxing Cai, Jihua Zhao, Weiguo Shen   +3 more
openaire   +1 more source

Solubilization of spiropyran in aqueous NaBr solutions of dodecyltrimethylammonium bromide

Colloids and Surfaces, 1992
Abstract 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
openaire   +1 more source

Potentiometric Study on Interaction of Dodecyltrimethylammonium Bromide with α-Amylase

Bulletin of the Chemical Society of Japan, 2004
Abstract The binding of dodecyltrimethylammonium bromide (DTAB) with α-amylase was investigated under various experimental conditions, such as pH, ionic strength, urea and protein concentration at 25 °C using surfactant membrane-selective electrodes as a fast and accurate method.
Abdol-Khalegh Bordbar, Reza Hosseinzadeh, Khodayar Omidiyan   +2 more
openaire   +1 more source

[Spectrophotometric study of DNA complexes with dodecyltrimethylammonium bromide].

Biofizika, 1997
Multistep nature of complex formation of bromide dodecyltrimethylammonium (DTMA) with thymus DNA is shown by spectrophotometric method application in the range of 220-600 nm. While adsorbing DTMA DNA undergoes some structural changes. DTMA concentration raise from 0.4 to 0.8 mM per DNA provokes hydrophobic layer formation leading to following ...
I G, Khutsishvili, B I, Kankiia, D G, Chkhaberidze, V G, Bregadze   +3 more
openaire   +1 more source

Dodecyltrimethylammonium and Di(dodecyldimethylammonium) bromides interactions with poly (amidoamine) dendrimer

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2004
Abstract The conductivity (κ), surface tension (γ), viscosity (η), dynamic light scattering (DLS) and Krafft temperature (KT) measurements of aqueous dodecyltrimethylammonium bromide (DTAB) and di(dodecyldimethylammonium bromide) (12-2-12) with poly (amidoamine) (PAMAM) dendrimers have been carried out at 25 °C. From the κ data, the apparent critical
Mandeep Singh Bakshi, Aman Kaura, Rakesh Kumar Mahajan, Tomokazu Yoshimura, Kunio Esumi   +4 more
openaire   +1 more source