This x-ray microtomography study investigates the dynamic pore-scale displacement of a dense non-aqueous phase liquid (DNAPL) such as heavy crude oil in heterogeneous aquifer rock using carbonaceous nanoparticles. The nanoparticles were synthesized from Wyoming coal and consisted mixture graphene quantum dots (GQD) engineered (E-GQD) equal proportions. Synergistic interactions between GQD E-GQD...

A theory, based on a modified Poisson-Boltzmann equation, is presented that allows us to calculate the excess interfacial tension of an electrolyte-oil interface accurately. The chaotropic (structure-breaking) ions are found to adsorb to the water-oil interface as the result of large polarizability, weak hydration, and hydrophobic and dispersion interactions. However, kosmotropic (structure-mak...

The assembly and maintenance of cilia depends on intraflagellar transport (IFT). Activated IFT motor kinesin-II enters the cilium with loaded IFT particles comprising IFT-A and IFT-B complexes. At the ciliary tip, kinesin-II becomes inactivated, and IFT particles are released. Moreover, the rate of IFT entry is dynamically regulated during cilium assembly. However, the regulatory mechanism of I...

Droplet microfluidics enables compartmentalized reactions in small scales and is utilized for a variety of applications across chemical analysis, material science, biology. While droplet successful technology, barriers include high “activation energy” to develop custom complex peripheral equipment. These limit the adoption labs or prototyping environments. This work demonstrates first time an o...

The dynamics of protein adsorption at an oil/water interface are examined over time scales ranging from seconds to several hours. The pendant drop technique is used to determine the dynamic interfacial tension of several proteins at the heptane/aqueous buffer interface. The kinetics of adsorption of these proteins are interpreted from tension/log time plots, which often display three distinct r...

This paper focuses on the calculation of interfacial tension two systems: low-density polyethylene with isotactic polypropylene and high-density syndiotactic polypropylene. For this, three methods to measure are compared: use Palierne's model, Gramespacher Meissner's both based additional elasticity or long relaxation times brought by shape recovery dispersed phase, ab-initio calculation, which...