The retention and adsorption of bisphenol A (BPA) and 17b-estradiol (E2) were examined using three commercially available ultrafiltration (UF) membranes. A stirred cell operated within a batch dead-end stirred cell was employed to study the solute retention and the membrane flux of solutions both in the absence and presence of natural organic matter (NOM) and single-walled carbon nanotubes (SWN...

The pulsed field gradient technique of NMR (PFG NMR) is applied to explore molecular diffusion in different specimens of zeolite NaCaA, notably in samples containing hierarchical pore systems, as well in a silica material with an ordered, bimodal mesopore structure. In the hierarchical zeolithes the diffusivities in the two pore spaces are measured separately from each other by choosing ethane ...

One-dimensional medium-pore zeolites are promising catalysts for propylene production from naphtha cracking due to their high selectivity. However, fast deactivation pore mouth blockage is preventing these being widely used in commercial applications. In this study, we molecular dynamics simulations investigate the diffusion of three one-dimensional aluminosilicate frameworks (ZSM-23, ZSM-22, Z...

Nanopipette-based sensors are one of the most effective tools for detecting nanoparticles, bioparticles, and biomolecules. Quantitative analysis nanoparticles with different shapes electrical charges is achieved through measurement blockage currents that occur when particles pass nanopore. However, typical nanopipette fabricated using a conventional needle-pulling method have pore-diameter limi...

An ultrafiltration-based process for oligosaccharide and peptide fractionation from a macroalgae subcritical water hydrolysate was studied. A wide range of separation results obtained depending on the membrane pore. 100 kDa cut-off size enough clarification with total retention colloidal materials. Oligosaccharides present in showed highest all membranes, glucans mostly, followed by galactans, ...

Application of scale inhibitors in oil and gas production is aimed at mitigating blockage during production. Many experimental, mathematical, numerical simulation modeling works have been carried out to evaluate behavior, performance, interaction the inhibitor chemicals within porous media relation their efficiency solving problem. However, mechanisms underpinning performance are not well publi...

Cyclosporin A induces closure of the mitochondrial permeability transition pore. We aimed to investigate whether this closure results in concomitant increases in mitochondrial membrane potential (DeltaPsim) and the production of reactive oxygen species. Fluorescent probes were used to assess DeltaPsim (JC-1, 5,5',6,6'-tetrachloro-1,1',3,3'-tetraethyl-benzimidazolyl-carbocyanine iodide), reactiv...

BACKGROUND/AIMS NO and reactive nitrogen species (RNS) are thought to be physiologically important effectors of mitochondrial calcium transport, but this issue was not studied in a living organism. According to literature, the modulation of Ca2+ uptake could influence RNS production via the action on mitochondrial NO synthase (mtNOS). The aim of this work was to study the effect of in vivo admi...