Results 171 to 180 of about 87,837 (200)

Dodecyltrimethylammonium bromide in water-urea mixtures: structure and energetics

The Journal of Physical Chemistry, 1992
Enthalpies 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, S. Causi, R. De Lisi, M. A. Floriano, S. Milioto, R. Triolo   +5 more
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Thermodynamic properties of pentanol in dodecyltrimethylammonium bromide aqueous solutions

Colloids and Surfaces, 1989
Abstract 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
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

Novel screen‐printed electrode for the determination of dodecyltrimethylammonium bromide in water samples

Drug Testing and Analysis, 2011
The construction and electrochemical response characteristics of a screen‐printed electrode (SPE) for the determination of dodecyltrimethylammonium bromide (DTAB) are described. The sensor was based on the use of DTA‐tetraphenylborate ion association complex as an electroactive material in screen‐printed electrode with dioctylsebacate (DOS) as a ...
Gehad G, Mohamed, Tamer Awad, Ali, M F, El-Shahat, M A, Migahed, A M, Al-Sabagh   +4 more
openaire   +2 more sources

Morphology Characterization and Single-Molecule Study of DNA−Dodecyltrimethylammonium Bromide Complex

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, Yan-Wei, Wang, Guang-Can, Yang, Lin-Xi, Zhang   +3 more
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Biocidal Behaviour of (Dodecyltrimethylammonium Bromide) on Carbon Steel in Well Water

Transactions of the Indian Institute of Metals, 2015
The inhibition of corrosion of carbon steel in well water using diethylenetriamine penta (methylene phosphonic acid) (DETPMP), Zinc ions and dodecyltrimethylammonium bromide (DTAB) was investigated using weight-loss measurement, electrochemical polarization and impedance methods.
T. Kasilingam, C. Thangavelu
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
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Enthalpies of mixing of dodecyltrimethylammonium bromide and secondary alcohols aqueous solutions

Journal of Colloid and Interface Science, 1988
The enthalpies of mixing of aqueous solutions of secondary alcohols (from propanol to heptanol) and of dodecyltrimethylammonium bromide were measured, taking as the baseline of the mixing process the enthalpy of dilution of the surfactant solutions. The measurements were made at a given alcohol concentration by changing systematically the surfactant ...
S Milioto, R De Lisi
openaire   +1 more source

Proximal Adsorption of Dodecyltrimethylammonium Bromide to the Silica−Electrolyte Solution Interface

Langmuir, 2002
The forces between a glass sphere and a flat fused silica plate in aqueous surfactant solution were obtained by atomic force microscopy. The effect of interparticle separation on the adsorption of the cationic surfactant dodecyltrimethylammonium bromide to silica was determined in the presence of 20 mM KBr by application of a Maxwell relation.
William J. Lokar, William A. Ducker
openaire   +1 more source