These models are evaluated when integrated in the tramway hybrid system by comparing the simulated responses with that one of a complete model, selleck which includes a detailed dynamic model of the main components of FC system. Steady state and dynamic simulations are performed in order to compare the models. Considering the external response of FC
system integrated in the tramway hybrid system, both reduced models show similar results with an important reduction of computation time with respect to the complete model. However, the reduced model 1 shows better results than the reduced model 2 when representing the internal behaviour of FC system, so that this model is considered the most appropriate for propulsion system applications.”
“Periodic density functional theory (DFT) calculations and microkinetic modeling are used to investigate the electrochemical oxidation of H-2 fuel on the (001) surface of Sr2Fe1.5Mo0.5O6 (SFMO) perovskite under anodic solid oxide fuel cell conditions. Three surface models with different Fe/Mo ratios in the topmost layer-identified by ab initio thermodynamic analysis-are used to investigate the H-2 oxidation mechanism. A microkinetic Z-DEVD-FMK solubility dmso analysis that considers the effects of anode bias potential
suggests that a higher Mo concentration in the surface increases the activity of the surface toward H-2 oxidation. At operating voltage and anodic SOFC conditions, AZD6738 solubility dmso the model predicts that water desorption is rate-controlling and that stabilizing the oxygen vacancy structure increases the overall rate for H-2 oxidation. Although
we find that Mo plays a crucial role in improving catalytic activity of SFMO, under fuel cell operating conditions, the Mo content in the surface layer tends to be very low. On the basis of these results and in agreement with previous experimental observations, a strategy for improving the overall electrochemical performance of SFMO is increasing the Mo content or adding small amounts of an active transition metal, such as Ni, to the surface to lower the oxygen vacancy formation energy of the SFMO surface.”
“A novel antitumor protein, designated RE26, with anti-lymphoma activity was purified from a Tris-HCl buffer extract of Rozites emodensis (Berk.) Moser by three successive steps of ion exchange chromatography. SDS-PAGE and gel filtration chromatography revealed that RE26 is a monomeric protein of 26 kDa, and isoelectrofocusing assay indicated its isoelectric point of 4.3-4.4. RE26 has high stability over a wide pH range (pH 3-11) but is sensitive to temperature and only stable under 40 degrees C. Partial amino acid sequences of two RE26 peptide fragments were determined by Edman degradation as GLEEEETLLLLFFPP and GTEQE. The half-maximal inhibitory concentration (IC50) of RE26 against tested lymphoma cell lines was around 4 mu g/ml.