Partial oxidation of methane to methanol on boron nitride at near critical acetonitrile.

Direct catalytic conversion of methane to methanol with O has been a fundamental challenge in unlocking abundant natural gas supplies. Metal-free methane conversion with 17% methanol yield based on the limiting reagent O at 275 °C was achieved with near supercritical acetonitrile in the presence of boron nitride. Reaction temperature, catalyst loading, dwell time, methane-oxygen molar ratio, and solvent-oxygen molar ratios were identified as critical factors controlling methane activation and the methanol yield.

Excitation wavelength dependent photon anti-bunching/bunching from single quantum dots near gold nanostructures.

In this study, we aim to investigate the change in photon emission statistics of single CdSe/CdS core/shell quantum dots (QDs) on dielectric modified gold nanoparticle (NP) substrates as a function of the excitation wavelength. Photons emitted from single QDs are typically "anti-bunched" and are independent of the excitation wavelength. However, when QDs are coupled to plasmonic substrates, even at the low excitation power regime, we observed a significant change in photoluminescence emission behavior of single QDs; i.

[Testing the Psychometric Properties of the Helping Alliance Questionnaire (HAQ) in Different Health Care Settings].

The Helping Alliance Questionnaire developed by Luborsky was psychometricly examined for the first time and translated into German by Bassler et al. in the mid-1990s. It consists of 11 Items, which are summarized to the scales "relation to the therapist" and "satisfaction with therapeutic outcome".

Cu supported on mesoporous ceria: water gas shift activity at low Cu loadings through metal-support interactions.

We have synthesized and tested a highly active Cu doped mesoporous CeO catalyst system for the low temperature water-gas shift (WGS) reaction. While typical oxide-supported copper WGS catalysts are characterized by high copper loadings (30-40%), the morphological properties of the mesoporous CeO material enable high catalytic activity at copper loadings as low as 1%. Operando X-ray diffraction, in situ X-ray absorption near-edge structure spectroscopy (XANES), and operando diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) methods were used to probe the interactions between the metal and mesoporous oxide components under reaction conditions.

Synthesis of highly monodisperse porous manganese oxide spheres using a butyric acid microemulsion.

Porous manganese oxide spheres form readily from a reaction between KMnO4 and n-butanol in aqueous butyric acid under ambient conditions. Spheres have uniform size, tuneable diameters and high surface areas. The material is an active catalyst for the oxidation of isopropanol to acetone.

Understanding the role of gold nanoparticles in enhancing the catalytic activity of manganese oxides in water oxidation reactions.

The Earth-abundant and inexpensive manganese oxides (MnOx) have emerged as an intriguing type of catalysts for the water oxidation reaction. However, the overall turnover frequencies of MnOx catalysts are still much lower than that of nanostructured IrO2 and RuO2 catalysts. Herein, we demonstrate that doping MnOx polymorphs with gold nanoparticles (AuNPs) can result in a strong enhancement of catalytic activity for the water oxidation reaction.

Crystalline mesoporous K(2-x)Mn₈O₁₆ and ε-MnO₂ by mild transformations of amorphous mesoporous manganese oxides and their enhanced redox properties.

Synthesis of crystalline mesoporous K(2-x)Mn8O16 (Meso-OMS-2), and ε-MnO2 (Meso-ε-MnO2) is reported. The synthesis is based on the transformation of amorphous mesoporous manganese oxide (Meso-Mn-A) under mild conditions: aqueous acidic solutions (0.5 M H(+) and 0.

Self-assembly of manganese oxide nanoparticles and hollow spheres. Catalytic activity in carbon monoxide oxidation.

Reactions between MnSO(4) and KMnO(4) in the presence of carboxylic acids provide a facile, one-pot route to nanostructured manganese oxides with high surface areas. Acetic and propionic acid induce formation of hierarchical nanosphere morphologies whereas butyric acid promotes assembly of hollow spheres. The materials are active catalysts for CO oxidation.

Acute altitude-induced hypoxia suppresses plasma glucose and leptin in healthy humans.

To examine the effects of acute altitude-induced hypoxia on the hormonal and metabolic response to ingested glucose, 8 young, healthy subjects (5 men and 3 women; age, 26 +/- 2 years; body mass index, 23.1 +/- 1.0 kg/m(2)) performed 2 randomized trials in a hypobaric chamber where a 75-g glucose solution was ingested under simulated altitude (ALT, 4300 m) or ambient (AMB, 362 m) conditions.

[The satisfaction of relatives with service delivery of nursing homes for the elderly. Development of the screening-questionnaire ZUF-A-7].

Purpose: To enable the measurement of satisfaction with the service delivery of residential homes, a practicable and statistical proven screening-test was supposed to educe. In order to identify critical quality-related situations a specific cut-off should be allocated.

Methods: Based on literature research a questionnaire was developed and responded by 3581 relatives of residents of 45 nursing homes for the elderly.

[The social situation of patients with late-life depression].

The social situation of patients with late-onset late-life depression admitted to a gerontopsychiatric day-clinic was assessed with respect to activities, social contacts, living conditions and finances. The patients were compared with an age- and sex-matched control group. Relationships of the social situation to life satisfaction and severity of depression were investigated.