Showing papers in "Journal of Colloid and Interface Science in 1995"

TL;DR: In this paper, structural perturbations and thermodynamic-stability changes in two similar-sized globular proteins, hen egg-white lysozyme and bovine milk α-lactalbumin, upon physical adsorption to either microspheres of a negatively charged polystyrene (PS-) latex or a dispersion of variably charged hematite (α-Fe2O3) are determined from differential scanning microcalorimetry (micro-DSC), isothermal titration micro-imaging, and more conventional electrophoretic-

TL;DR: In this paper, a tiltable plane was used to study the hysteresis of water and ethylene glycol drops on polymers and silicon wafers, and they found a linear correlation between the aspect ratio of drops and their contact angles, and retentive force increased with elongation of the drops.

TL;DR: In this article, an alternating voltage is applied to a colloid, and the particles move back and forth at a velocity that depends on their size and zeta potential and on the frequency of the applied field.

TL;DR: In this paper, a stress-optical relationship has been derived for colloidal suspensions which enables the use of optical dichroism measurements to distinguish between thermodynamic and hydrodynamic contributions to the stress tensor.

TL;DR: In this paper, a simple non-Nernstian model of the oxide charging along with the experimental results demonstrate a very strong buffering effect of common oxide surfaces at high oxide content.

TL;DR: In this paper, the dimensionless flow resistance in the corners of capillary tubes was applied to the imbibition of a slug of a wetting fluid introduced in a 300-and a 500-μm square capillary tube.

TL;DR: In this article, a nonlinear Poisson-Boltzmann theory is used to calculate the electrical double-layer force and interaction free energy between dissimilarly charged surfaces.

TL;DR: In this article, a simple thermodynamic analysis of ionic/nonionic mixed micelles in the media of moderately high ionic strengths is presented, and a measure of the stability of mixed mouselles is presented.

TL;DR: In this article, a method for determining the pore size distribution in porous materials by applying dynamic and thermodynamic relationships for the freezing and melting curves of water in silica gels filled with water has been investigated.

TL;DR: The cell walls of Gram-positive bacteria are highly porous structures that contain many acidic groups, leading to a pH- and salt-dependent charge, and a binding model, the Langmuir-Freundlich equation, is selected which gives a very close reproduction of the observed charging behavior.

TL;DR: In this paper, a phase diagram of an adhesive hard-sphere dispersion is constructed using various experimental techniques, and a gel phase is found in which the Brownian particles form an interconnected static structure.

TL;DR: The change in the secondary structure of T4 lysozyme upon adsorption to silica particles was studied with circular dichroism and the rate of conformational change differed among the three proteins and was fastest for the tryptophan mutant.

TL;DR: In this article, the adsorption isotherms of anionic and cationic surfactants on the mineral oxide rutile have been investigated as a function of surfactant concentration, surfactor chain length, solution pH, and ionic strength in solution.

TL;DR: In this article, the authors used the fluorescence spectra of 1,3,6,8-pyrenetetrasulfonic acid (PTS) trapped in the water pools to demonstrate that free water molecules do not become available until the waterto-surfactant molar ratio (R) exceeds about 10.

TL;DR: In this paper, drop-size-dependent contact angle measurements were performed on mica surfaces coated with a fluoro compound (FC 721) and the following five liquids: decane, dodecane, methyl salicylate, ethylene glycol, and glycerol.

TL;DR: In this paper, the behavior of mercury sorption on amorphous ferric oxide (HFO) and α-SiO2 can be simulated using the surface complexation approach, where ternary surface complexes between the surface (S-OH0), Hg2+, OH- or Cl- are included in the model.

TL;DR: For hydrophilic walls, the formation of a macroscopic gas bubble during the laser pulse is consistent with earlier work on the existence of submicrobubble (bubston) clusters in bulk water as discussed by the authors.

TL;DR: In this paper, titration data for α-Al2O3 and metal ion sorption data for Co(II) are used to determine the metal ion sarsption parameters for the triple-layer model (TLM) version of the SCM.

TL;DR: In this article, the authors used neutron reflection to study the composition of layers of dodecyl sulfate (SDS) and dodecanol mixtures adsorbed at the air/water interface.

TL;DR: In this paper, an experimental investigation was performed on water electrosprays operated in the cone-jet mode, and two well-distinguished stability domains were found in the plane of operating variables, voltage vs liquid flow rate, both domains being characterized by a stable conejet mode of operation.

TL;DR: In this article, the adsorption of lysozyme onto silicon oxide surfaces was investigated using in situ ellipsometry, and the experimental data obtained were compared to models for adhesion kinetics.

TL;DR: In this paper, the problem of the slow motion of a spherical particle partially immersed in a viscous liquid was considered and the surface diffusion coefficient was derived for different values of surface dilatational and shear viscosity and contact angles.

TL;DR: In this article, the authors used the classical nucleation theory to estimate the interfacial tension between barite and supersaturated solutions with NaCl and found that the induction period decreases with increasing NaCl concentrations to 3 m and then starts to increase slightly at a given temperature and saturation index.

TL;DR: In this paper, an atomic force microscope was used to study the interaction forces between a silica particle and a planar silica surface, both bearing a terminally grafted n -octadecyl alcohol sheath (SiO 2 -C 18 ), mediated by cyclohexane solutions of poly(dimethyl siloxane) (PDMS).

TL;DR: In this article, a piece of yarn is put into contact with a wetting liquid and the mass of liquid absorbed is recorded as a function of time, and the dynamics of capillary rise is compared to the classical Washburn law observed in the case of a porous membrane.

TL;DR: In this article, thermal porosimetry was used to determine the pore size distributions from the melting and freezing curves of water confined in pore water, and the cumulative pore volumes, surface areas, and peak radii of the PSD curves were determined from both the DSC melting and freezable pore data.

TL;DR: In this paper, a new methodology based on the study of the viscoelastic properties of polymer monolayers was developed, where the Maxwell model applied to a bidimensional body correlates with the dynamic behavior of polyvinyl alcohol (PVA) spread or adsorbed at the air/water and dichloromethane (DCM)/water interfaces.

TL;DR: In this article, an exact analytical solution for the boundary effects on the electrophoretic velocity of a charged particle in a spherical cavity using the linearized Poisson-Boltzmann equation, with the resulting expression being valid for all double-layer thicknesses and all particle/pore sizes.

TL;DR: In this article, electron micrograph images of fractal soot clusters obtained from a premixed CH4/O2 flame are analyzed for two, somewhat neglected, morphological parameters: the structural coefficient k0 in N = k0 (Rg/a)Dr and the perimeter cutoff function h(x) of the cluster density autocorrelation function.

TL;DR: In this paper, a static and dynamic light scattering study of casein solution in a Pipes-KCl buffer at pH 6.75 and a constant ionic strength in the dilute concentration regime is presented.