Thermal Hydroquinone Oxidation on Co/N-doped Carbon Proceeds by a Band-Mediated Electrochemical Mechanism.

Molecular metal complexes catalyze aerobic oxidation reactions via redox cycling at the metal center to effect sequential activation of O and the substrate. Metal surfaces can catalyze the same transformations by coupling independent half-reactions for oxygen reduction and substrate oxidation mediated via the exchange of band-electrons. Metal- and nitrogen-doped carbons (MNCs) are promising catalysts for aerobic oxidation that consist of molecule-like active sites embedded in conductive carbon hosts.

Redox-Induced Structural Reorganization Dictates Kinetics of Cobalt(III) Hydride Formation via Proton-Coupled Electron Transfer.

Two-electron, one-proton reactions of a family of [CoCp(dxpe)(NCCH)] complexes (Cp = cyclopentadienyl, dxpe = 1,2-bis(di(aryl/alkyl)phosphino)ethane) form the corresponding hydride species [HCoCp(dxpe)] (dxpe = dppe (1,2-bis(diphenylphosphino)ethane), depe (1,2-bis(diethylphosphino)ethane), and dcpe (1,2-bis(dicyclohexylphosphino)ethane)) through a stepwise proton-coupled electron transfer process. For three [CoCp(dxpe)(NCCH)] complexes, peak shift analysis was employed to quantify apparent proton transfer rate constants from cyclic voltammograms recorded with acids ranging 22 p units. The apparent proton transfer rate constants correlate with the strength of the proton source for weak acids, but these apparent proton transfer rate constants curiously plateau () as the reaction becomes increasingly exergonic.

Proton-Coupled Electron Transfer Reactions with Photometric Bases Reveal Free Energy Relationships for Proton Transfer.

The proton-coupled electron transfer (PCET) oxidation of p-aminophenol in acetonitrile was initiated via stopped-flow rapid-mixing and spectroscopically monitored. For oxidation by ferrocenium in the presence of 7-(dimethylamino)quinoline proton acceptors, both the electron transfer and proton transfer components could be optically monitored in the visible region; the decay of the ferrocenium absorbance is readily monitored (λmax = 620 nm), and the absorbance of the 2,4-substituted 7-(dimethylamino)quinoline derivatives (λmax = 370-392 nm) red-shifts substantially (ca. 70 nm) upon protonation.

Efficacy of daily intranasal fluticasone propionate on ocular symptoms associated with seasonal allergic rhinitis.

Background: Allergic rhinitis (AR) is an inflammatory condition of the nasal mucosa characterized by symptoms of nasal discharge, itching, sneezing, and congestion. Ocular symptoms are commonly associated with AR and include itching or burning, tearing or watering, and redness. Intranasal corticosteroids are a mainstay of treatment, and their effect on nasal symptoms is well described.

A study of the efficacy and safety of ciclesonide hydrofluoroalkane nasal aerosol in patients with seasonal allergic rhinitis from mountain cedar pollen.

A nasal aerosol formulation of ciclesonide with a hydrofluoroalkane propellant (CIC-HFA) is currently in development for treatment of allergic rhinitis (AR). This study evaluated the efficacy and safety of once-daily administration of CIC-HFA 74 or 148 micrograms compared with placebo in patients with seasonal AR (SAR) from mountain cedar pollen. Patients ≥12 years of age with a ≥2-year history of SAR from mountain cedar pollen were randomized in a placebo-controlled, double-blind, parallel group, multicenter study to CIC-HFA 74 micrograms, CIC-HFA 148 micrograms, or placebo once daily in the morning for 2 weeks.

Efficacy and safety of azelastine 0.15% nasal spray administered once daily in patients with allergy to Texas mountain cedar pollen.

Background: A previous study with azelastine nasal spray in patients with seasonal allergic rhinitis (SAR) demonstrated that increasing the azelastine concentration from 0.1% to 0.15% allowed for once-daily dosing without increasing the incidence of adverse effects.

Efficacy and safety of azelastine 0.15% nasal spray administered once daily in subjects with seasonal allergic rhinitis.

Azelastine nasal spray is commercially available as a 0.1% w/v solution and is recommended for twice-daily dosing. Increasing the azelastine concentration to 0.

Budesonide turbuhaler delivered once daily improves health-related quality of life in adult patients with non-steroid-dependent asthma.

Budesonide inhalation powder via the dry-powder multidose inhaler Turbuhaler (budesonide Turbuhaler) has been shown to improve lung function and symptoms in adults with asthma. In this double-blind, placebo-controlled, multicenter trial, we evaluated the effects of once-daily budesonide Turbuhaler on health-related quality of life (HRQL) in 177 adults (aged 18-70 years) with non-steroid-dependent asthma. Patients were randomized to receive budesonide Turbuhaler (400 micrograms) once daily or placebo for 12 weeks.

Fluticasone propionate aqueous nasal spray provided significantly greater improvement in daytime and nighttime nasal symptoms of seasonal allergic rhinitis compared with montelukast.

Background: The safety and efficacy of intranasal corticosteroids for the treatment of allergic rhinitis is well documented in the literature. Additionally, an expert panel has concluded that intranasal corticosteroids are the first line of therapy when obstruction is a major component of rhinitis. Montelukast is a leukotriene receptor antagonist recently approved for the treatment of seasonal allergic rhinitis (SAR).

Inhaled insulin using the AERx Insulin Diabetes Management System in healthy and asthmatic subjects.

Objective: The AERx insulin Diabetes Management System (AERx iDMS) (Aradigm, Hayward, CA) delivers an aerosol of liquid human insulin to the deep lung for systemic absorption. This study examined the effects on pulmonary function, pharmacokinetics, and pharmacodynamics of inhaled insulin in asthmatic and nonasthmatic subjects without diabetes.

Research Design And Methods: A total of 28 healthy and 17 asthmatic (forced expiratory volume during the first second [ FEV(1)] 50-80% of predicted value) subjects were enrolled in a two-part, open-label trial.

Relief of sinus pain and pressure with fluticasone propionate aqueous nasal spray: a placebo-controlled trial in patients with allergic rhinitis.

Although allergic rhinitis is commonly associated most with symptoms of nasal congestion, rhinorrhea, sneezing, and itching, the symptom of sinus pain and pressure often prompts the patient to seek medical attention. The effect of fluticasone propionate on this symptom has not been studied. The purpose of this study was to compare the efficacy and safety of fluticasone propionate aqueous nasal spray to placebo vehicle in the treatment of patients with sinus pain and pressure arising from allergic rhinitis.