Clinical and prognostic implications of rim restriction following glioma surgery.

Rim restriction surrounding the resection cavity of glioma is often seen on immediate post-op diffusion-weighted imaging (DWI). The etiology and clinical impact of rim restriction are unknown. We evaluated the incidence, risk factors and clinical consequences of this finding.

Application of Molecular Catalysts for the Oxygen Reduction Reaction in Alkaline Fuel Cells.

The development of precious group metal-free (PGM-free) catalysts for the oxygen reduction reaction is considered as the main thrust for the cost reduction of fuel cell technologies and their mass production. Within the PGM-free category, molecular catalysts offer an advantage over other heat-treated PGM-free catalysts owing to their well-defined structure, which enables further design of more active, selective, and durable catalysts. Even though non-heat-treated molecular catalysts with exceptional performance have been reported in the past, they were rarely tested in a fuel cell.

Aminomethylene-Phosphonate Analogue as a Cu(II) Chelator: Characterization and Application as an Inhibitor of Oxidation Induced by the Cu(II)-Prion Peptide Complex.

Recently, we reported on a series of aminomethylene-phosphonate (AMP) analogues, bearing one or two heterocyclic groups on the aminomethylene moiety, as promising Zn(II) chelators. Given the strong Zn(II) binding properties of these compounds, they may find useful applications in metal chelation therapy. With a goal of inhibiting the devastating oxidative damage caused by prion protein in prion diseases, we explored the most promising ligand, {bis[(1-imidazol-4-yl)methyl]amino}methylphosphonic acid, AMP-(Im), , as an inhibitor of the oxidative reactivity associated with the Cu(II) complex of prion peptide fragment 84-114.

Bioinspired Electrocatalysis of Oxygen Reduction Reaction in Fuel Cells Using Molecular Catalysts.

One of the most important chemical reactions for renewable energy technologies such as fuel cells and metal-air batteries today is oxygen reduction. Due to the relatively sluggish reaction kinetics, catalysts are necessary to generate high power output. The most common catalyst for this reaction is platinum, but its scarcity and derived high price have raised the search for abundant nonprecious metal catalysts.

A surprising substituent effect in corroles on the electrochemical activation of oxygen reduction.

Four β-pyrrole-substituted cobalt(iii) corroles were studied as electrocatalysts for the oxygen reduction reaction. The results disclose high dependence of the corrole's performance on its substituents, but once adsorbed on a high surface area carbon, this effect vanishes, resulting in a better catalytic performance than most well-defined molecular electrocatalysts for this reaction.

Modulation of Oxygen Content in Graphene Surfaces Using Temperature-Programmed Reductive Annealing: Electron Paramagnetic Resonance and Electrochemical Study.

The oxidation level and properties of reduced graphene oxides (rGOs) were fine-tuned using temperature-programmed reductive annealing. rGOs were annealed at different temperatures (from 500 to 1000 °C) in hydrogen to modulate their oxidation levels. The surface of the rGOs was fully characterized using electron paramagnetic resonance backed by Raman, X-ray diffraction, and chemical analysis measurements.

Metallocorroles as Nonprecious-Metal Catalysts for Oxygen Reduction.

The future of affordable fuel cells strongly relies on the design of earth-abundant (non-platinum) catalysts for the electrochemical oxygen reduction reaction (ORR). However, the bottleneck in the overall process occurs therein. We have examined herein trivalent Mn, Fe, Co, Ni, and Cu complexes of β-pyrrole-brominated corrole as ORR catalysts.

Cognitive contributions to theory of mind ability in children with a traumatic head injury.

The objective of the current study is to examine the contribution of intellectual abilities, executive functions (EF), and facial emotion recognition to difficulties in Theory of Mind (ToM) abilities in children with a traumatic head injury. Israeli children with a traumatic head injury were compared with their non-injured counterparts. Each group included 18 children (12 males) ages 7-13.

Geriatrics education in U.S. dental schools: where do we stand, and what improvements should be made?

The number of adults above sixty-five years of age in the United States will expand considerably over the next thirty years. However, many dentists believe that their dental education did not adequately prepare them to treat an older adult population. Consequently, it is important to review dental curricula to determine where these gaps in education may occur and what can be done to address them in order to improve access to care.

Light-induced and redox-triggered uptake and release of substrates to and from mesoporous SiO nanoparticles.

The photonic- and redox-triggered cyclic uptake and release of organic substrates in functionalized mesoporous SiO nanoparticles (NPs) is demonstrated. The mesoporous SiO NPs are functionalized with nitrospiropyran photoisomerizable units. Rhodamine B is encapsulated in the channels of the SiO NPs and trapped by the hydrophobic nitrospiropyran capping units.

Electrochemical quartz crystal microbalance (EQCM) studies of ions and solvents insertion into highly porous activated carbons.

Electrochemical quartz crystal microbalance (EQCM) technique provides a direct assessment to the behavior of electroadsorbed ions and solvent molecules confined in micropores of activated carbon electrodes in contact with practically important aprotic electrolyte solutions. The estimated value of the solvation number equal to 3 is evident for a partial desolvation of Li(+) cations when adsorbed in carbon micropores.

Application of a quartz-crystal microbalance to measure ionic fluxes in microporous carbons for energy storage.

Fast ionic transport in microporous activated-carbon electrodes is a prerequisite for the effective energy storage in electrochemical supercapacitors. However, the quartz-crystal microbalance (QCM), a direct tool to measure ionic fluxes in electrochemical systems, has not yet been used for studying transport phenomena in activated carbons (except for an early report on carbon nanotubes). Conventional electroanalytical and suitable surface and structure-analysis techniques provide limited prognostic information on this matter.