In vitro evaluation of a PEKK and poly-carbonate-urea-urethane implant for the treatment of osteochondral defects
Biomedical Engineering | Tissue Biomechanics and Implants
Colorimetric determination of copper(II) by using branched-polyethylenimine droplet evaporation on a superhydrophilic-su...
Published in Microchimica Acta
A colorimetric method is described for the determination of Cu(II). It is based on branched polyethylenimine (BPEI) droplet evaporation on a superhydrophilic-superhydrophobic polystyrene micropatterned surface. Exposure to Cu(II) leads to a color change from colorless to light blue and dark blue. The micropatterned surface was fabricated via combin...
Superhydrophobic capillary coatings: Elaboration, characterization and application to electrophoretic separations.
Published in Journal of chromatography. A
Separation efficiency is ideally controlled by molecular diffusion in capillary electrophoresis (CE). However, other adverse phenomena, such as solute adsorption on capillary surface, tend to increase the peak dispersion. An interesting alternative to limit the solute adsorption is to avoid as much as possible the contact of the solute with the cap...
Investigation of the effects of ions on short-range non-DLVO forces at the calcite/brine interface and implications for ...
Published in Journal of colloid and interface science
A primary question investigated in this study is the influence of brine chemistry on the behavior of short-range non-DLVO (e.g., hydration, discrete ion charge effects, and so on) forces at calcite surfaces. Specifically, how do wetting films containing Na+ differ from those containing Mg2+? Force-distance spectroscopy as measured by atomic force m...
Tunable dispersibility and wettability of graphene oxide through one-pot functionalization and reduction.
Published in Journal of colloid and interface science
Surface functionalization is an effective method to tune the wettability and dispersibility of graphene oxide (GO) nanosheets, but functionalization methods often require long reaction times and expensive reagents. To meet this GO processing need, we propose a quick, industrially scalable GO functionalization scheme based upon Fischer esterificatio...
A thermodynamically consistent characterization of wettability in porous media using high-resolution imaging.
Published in Journal of colloid and interface science
Conservation of energy is used to derive a thermodynamically-consistent contact angle, θt, when fluid phase 1 displaces phase 2 in a porous medium. Assuming no change in Helmholtz free energy between two local equilibrium states we find that Δa1scosθt=κϕΔS1+Δa12, where a is the interfacial area per unit volume, ϕ is the porosity, S is the saturatio...
Role of trapped air and lubricant in the interactions between fouling and SiO2 nanoparticle surfaces.
Published in Colloids and surfaces. B, Biointerfaces
Both biomimetic superhydrophobic surfaces and biomimetic slippery liquid-infused porous surfaces (SLIPSs) have been developed as potential alternatives for solving the problem of biofouling. Herein, a facile method was used to construct superhydrophobic surfaces and liquid infused porous surfaces on stainless steels for antifouling applications. Th...
Wettability - Combine the macroscopic approach to pore-scale analysis
Fluid flow in porous media is known to be ruled by relative permeability. The relative permeability itself is dramatically impacted by the wettability state of the medium. Wettability refers to the relative preference of a solid material for one fluid in a diphasic or multiphasic system. Despite its great impact in oil recovery, a proper characteri...
An experimental investigation of dynamic elastic moduli and acoustic velocities in heterogeneous carbonate oil reservoir...
Published in SN Applied Sciences
One of the most common methods for determining elastic moduli of rocks is the acoustic velocity log. The elastic moduli of reservoir rocks are widely used in geomechanical modeling, borehole stability analysis, and hydraulic fracture design. In the carbonate reservoirs, the effect of the fluid type on the dynamic elastic modulus under high pressure...
A novel fatty alkene from marine bacteria: A thermo stable biosurfactant and its applications.
Published in Journal of hazardous materials
In this study, a novel thermo stable biosurfactants, 1-Pentanonacontene (C95H190) a fatty alkene and 3-Hydroxy-16-methylheptadecanoic acid (C18H36O3) were isolated from a marine isolate SGD-AC-13. Biosurfactants were produced using 1% yeast extract in tap water as production medium at 24 h in flask and 12 h in bioreactor. Using 16S rRNA gene sequen...
