The net interaction between a probe tip coated with bovine serum albumin (BSA) protein and a flat substrate coated with poly(ethylene oxide) (PEO) polymer was measured directly on approach in water and electrolyte solutions using AFM. The approach force curve between the two surfaces was monotonically repulsive in water and in electrolyte solutions. At pH ~5, slightly above the isoelectric poin...

BACKGROUND AND PURPOSE Progressive external ophthalmoplegia (PEO) with Mendelian inheritance is a heterogeneous group of diseases associated with multiple deletions of mitochondrial DNA (mtDNA), which results from the disturbed replication and maintenance of mtDNA secondary to the mutations of nuclear genes including POLG, SLC25A4, C10ORF2, POLG2, OPA1, and RRM2B. The aim of this study was to i...

The melting behavior of low molecular weight poly(ethylene oxide) (PEO) fractions has been studied via generalized two-dimensional infrared (2D-IR) correlation spectroscopy and a new stochastic-pulse-based temperature modulation differential scanning calorimetry (DSC) technique (TOPEM). 2D-IR correlation analysis of the melting of PEO shows that nu(s)(CH2) and gamma(a)(CH2) vary prior to nu(s)(...

[1] Dissolution of the surfaces of rock fractures can cause significant alteration of the fracture void space (aperture) and fracture permeability (k). Both surface reaction rates and transport of reactants within the fracture can limit local dissolution. We investigated the role of Peclet number (Pe), a measure of the relative importance of advective and diffusive transport of reactants, on fr...

Amorphous poly(ethylene oxide)/poly(methyl methacrylate) (PEO/PMMA) blend films in extremely constrained states are meta-stable and phase separation of fractal-like branched patterns happens in them due to heterogeneously nucleated PEO crystallization by diffusionlimited aggregation. The crystalline branches are viewed flat-on with PEO chains oriented normal to the substrate surface, upon incre...

BACKGROUND Polyethylene oxide (PEO) is a synthetic polymer commonly used in medicine production to reduce toxicity. In the present study, we assessed whether PEO can have a functional effect on improving microcirculatory blood flow after hemorrhagic shock in an animal model. METHODS Hemorrhagic shock (HS) was introduced in 78 C57BL/6 mice, which were then equally divided into two groups. One ...

The adsorption of polymers on clay is important in many applications. However the mechanisms of poly(ethylene oxide) (PEO) adsorption n smectite and its effect on suspension rheology are not well elucidated at present. The aim of this study was to investigate the mechanisms esponsible for PEO sorption on smectite and how this impacts on dispersive behavior of smectite suspension. The results in...

Effects of alloying element Ca on the corrosion behavior and bioactivity of films formed by plasma electrolytic oxidation (PEO) on AM60 alloys were investigated. The corrosion behavior was studied by conducting electrochemical tests in 0.9% NaCl solution while the bioactivity was evaluated by soaking the specimens in simulated body fluid (SBF). Under identical anodization conditions, the PEO fi...

The effect of prC'adsorbed sx>lethylene oxide ( PEO) on silica on the subsequent adsorptioo of sodium dodec)1 sulfate (50s) on the silica was investipted in this study. Even though SDS does not normally adsorb on the similarly charged silica, it is shown that anionic 50s can be made to adsorb on it in the presence of preadsorbed PEO. The role of polymer molecular weight and the mode of addition...