Enhancing the low temperature oxidation performance over a Pt and a Pt–Pd diesel oxidation catalyst

The influence of hydrogen over platinum and combined platinum–palladium diesel oxidation catalysts were investigated on the oxidation kinetics of CO, HC and NO. Although H2 has been reported to have a positive effect on CO and HC oxidation as well as NO2 formation over platinum catalysts, there is still uncertainty whether this is due to the temperature rise caused by H2 oxidation or the result of a change in the reaction kinetics of CO, HC and NO oxidation by the production of intermediate species. The results have showed smaller H2 concentrations are more effective in improving the catalyst light-off temperature as well as promoting NO oxidation over both platinum and platinum–palladium catalysts. It is suggested that these benefits are a result of not only the exothermic reactions which in turn increase the local catalyst temperature but also H2 increasing the rate of reactions and the species accessibility to the catalyst active sites thus further CO, HC and NO oxidation can occur at lower catalyst temperatures

Verification and Validation Test Plan for Prague Ruzyne Airport

This document is positioned within the framework of activities for the ´European airport Movement Management by A-SMGCS (EMMA)´ Project. Sub-project SP6 deals with the Verification and Validation (V and V) activities to be carried out within the Project. This document is the deliverable D6.1.2, the V and V Test Plan for the A-SMGCS at Prague-Ruzyne Airport. Its purpose is to: 1. Identify the V and V aims, objectives and hypotheses for the tests 2. Plan and prepare the validation exercises 3. Provide a high-level description of how the V and V activities will be conducted

Test Results Prague

The document is the test report of the Prague test campaign that were conducted in the Integrated Project EMMA, a project of the sixth framework programme of the European Commission. It contains all results and conclusion that were gained with real time simulations and technical and operational trials at Prague Airport

Validation Test Plan PRG

The test plans for two real-time simulations and a field test are documented here. Higher A-SMGCS services were tested in the Prague Airport environment. Aims and objectives, experimental factors and the experiment design are descripted here. Furthermore, the necessary metrics and measurements, the hypotheses that can be accepted or rejected based on the measurements made, and the complete test environment. In addition to that scenario specifications are given and requirements for participants and training of participants are determined. Finally, the conduct of the experiments is described and the envisioned analysis methods is outlined. The document follows the E-OCVM guidelines

Crystallographic Studies on the Ribosome, a Large Macromolecular Assembly Exhibiting Severe Nonisomorphism, Extreme Beam Sensitivity and No Internal Symmetry

Crystals, diffracting best to around 3 Å, have been grown from intact large and small ribosomal subunits. The bright synchrotron radiation necessary for the collection of the higher-resolution X-ray diffraction data introduces significant decay even at cryo temperatures. Nevertheless, owing to the reasonable isomorphism of the recently improved crystals of the small ribosomal subunits, reliable phases have been extracted at medium resolution (5-6 Å) and an interpretable five-derivative MIR map has been constructed. For the crystals of the large subunits, however, the situation is more complicated because at higher resolution (2.7-7 Å) they suffer from substantial radiation sensitivity, a low level of isomorphism, instability of the longest unit-cell axis and nonisotropic mosaicity. The 8 Å MIR map, constructed to gain insight into this unusual system, may provide feasible reasoning for the odd combination of the properties of these crystals as well as hints for future improvement. Parallel efforts, in which electron-microscopy-reconstructed images are being exploited for molecular-replacement studies, are also discussed

Crystallographic Studies on the Ribosome, a Large Macromolecular Assembly Exhibiting Severe Nonisomorphism, Extreme Beam Sensitivity and No Internal Symmetry

Crystals, diffracting best to around 3 Å, have been grown from intact large and small ribosomal subunits. The bright synchrotron radiation necessary for the collection of the higher-resolution X-ray diffraction data introduces significant decay even at cryo temperatures. Nevertheless, owing to the reasonable isomorphism of the recently improved crystals of the small ribosomal subunits, reliable phases have been extracted at medium resolution (5-6 Å) and an interpretable five-derivative MIR map has been constructed. For the crystals of the large subunits, however, the situation is more complicated because at higher resolution (2.7-7 Å) they suffer from substantial radiation sensitivity, a low level of isomorphism, instability of the longest unit-cell axis and nonisotropic mosaicity. The 8 Å MIR map, constructed to gain insight into this unusual system, may provide feasible reasoning for the odd combination of the properties of these crystals as well as hints for future improvement. Parallel efforts, in which electron-microscopy-reconstructed images are being exploited for molecular-replacement studies, are also discussed