Ž . Abstract: Hollow fiber flow field-flow fractionation HF-FlFFF has been tested Ž . by varying the temperature 21]738C to increase separation speed with reduced lift forces. It has been experimentally shown that the separation time of 0.050]0.426-mm polystyrene latex standards can be reduced approximately by half, at 598C, compared to the separation at room temperature. In addition, the resol...

We demonstrate formation of long-lived cylindrical jets of a viscoelastic fluid using hydrodynamic focusing. A solution of polyacrylamide in water is driven coaxially with immiscible oil and subjected to strong extensional flow. At high flow rates, the aqueous phase forms jets that are 4-90 microm in diameter and several centimeters long. The liquid surfaces of these jets are then used as templ...

"> Experimental measurements of overall gas holdup (εg<span style="font-family: TimesNewRomanPS-ItalicMT; font-size: 10pt; c...

An ultrasmall hydrodynamic diameter is a critical factor for the renal clearance of nanoparticles from the body within a reasonable timescale. However, the integration of diagnostic and therapeutic components into a single ultrasmall nanoparticle remains challenging. In this study, pH-activated nanodots (termed Fe-CPNDs) composed of coordination polymers were synthesized via a simple and scalab...

By molecular dynamics simulations, we investigated the transport of charged polymers in applied electric fields in confining environments, which were straight cylinders of uniform or non-uniform diameter. In the simulations, the solvent was modeled explicitly and, also, the counterions and coions of added salt. The electrophoretic velocities of charged chains in relation to electrolyte friction...

Colloidal gels are out-of-equilibrium structures, made up of a rarefied network of colloidal particles. Comparing experiments to numerical simulations, with hydrodynamic interactions switched off, we demonstrate the crucial role of the solvent for gelation. Hydrodynamic interactions suppress the formation of larger local equilibrium structures of closed geometry, and instead lead to the formati...

In recent years, utilization of chitosan /tripolyphosphate nanoparticles has been considered greatly as protein delivery vehicles. Effects of a variety of factors on final characteristics of nanoparticles have been studied by many investigators. Although, the objective of this study was to achieve smaller chitosan nano carriers via changing fabrication parameters such as pH and temperature and ...

Protein kinases are enzymes that play a key role in cellular regulation. One of the best understood kinases from a biochemical point of view is protein kinase A (PKA). PKA is a cAMP dependent seronine/threonine kinase, which is composed of two regulatory (PKA-R) and two catalytic (PKA-C) subunits. The enzyme undergoes multiple conformational changes and thus, information on size and shape of th...

background and aims: adenovector gene transfer induces inflammatory response that finally leads to vector removal from delivered site. the effect of hydrodynamic pre-injection on adenovector mediated liver inflammation remained elusive. materials and methods: different mice groups were pre-treated by hydrodynamic saline, dexamethasone or nothing prior to adeno-luciferase administration. their s...