Selective catalytic reduction of NOx from mobile source over Cu-SAPO-34 catalysts always suffer sulfur poisoning in practical applications. The pore blockage and loss active Cu species after seriously damage the ability catalysts. In this work, we used SO42--coordinated to improve resistance, which can still maintain 90% NO conversion 24 h reaction an SCR feed with high concentration SO2. A ser...

the aim of this paper was to assess the effect of catechol (ch), as a peroxidase inhibitor, and 8-hydroxyquinoline citrate (hqc), as a bacterial inhibitor, on keeping the quality of gerbera jamesonii cv. hongyan cut flowers, known to be limited by vascular occlusion. blockage in the stem xylem vessels of cut gerbera was studied using light and scanning electron microscope. the results showed th...

An investigation into the total blockage effects on aerodynamic drag in closed-wall wind tunnel testing has been carried out by computational fluid dynamics (CFD). The simulation of flow past two different realistic, full-scale, heavy-duty truck models was conducted. The models were placed at different yawing angles in the virtual wind tunnels with blockage ratio of about 10%; which is exactly ...

The study of the deactivation HY zeolites in dehydration reaction glycerol to acrolein has represented a challenge for design new catalysts. with SiO2/Al2O3 molar ratios between 3.5 and 80 were studied. solids characterized by XRD, N2 physisorption, SEM-EDXS, Raman UV-vis spectroscopies, infrared spectroscopy pyridine (FTIR-Py) catalytic activity tests from 250 °C 325 °C. It was found that tota...

Advances in imaging and reductionist approaches have provided a high-resolution understanding of nuclear pore complex structure and transport, revealing unexpected mechanistic complexities based on nucleoporin functions and specialized import and export pathways.

IRSN has carried out a State-of-the-Art-Review of the main experimental programmes related to fuel behaviour under Loss-of-Coolant-Accident (LOCA) conditions conducted from the 70s until now, that has been split in three parts. The second part is devoted to the question of the coolability of blocked regions in a rod bundle after ballooning in a LOCA. The main findings from this part are present...

Apparent blockage of monovalent cation currents by the permeating blocker Ca(2+) is a physiologically essential phenomenon relevant to cyclic nucleotide-gated (CNG) channels. The recently determined crystal structure of a bacterial homolog of CNG channel pores, the NaK channel, revealed a Ca(2+) binding site at the extracellular entrance to the selectivity filter. This site is not formed by the...

Structural determination of the nuclear pore complex has been limited by the complexity and size of this cellular megalith. By taking advantage of exceptionally stable nucleoporins from the thermophilic fungus Chaetomium thermophilum, Amlacher et al. (2011) provide new insight into a core element of the nuclear pore scaffold.

In this study, commercial SiC ceramic microfiltration membranes were coated with carbon nanotubes (CNTs) using chemical vapor deposition (CVD) to obtain a conductive and hydrophobic membrane material. order have better control of the surface electronic properties developed material, two adjacent fractional factorial designs (25-2) implemented quantify CNTs synthesis parameters influence. The de...

The deposition of carbon from methane pyrolysis on various porous media was investigated at 950–1100 ◦C. 7 Types unfunctionalized carriers were used, with pore sizes varying between 4 nm and 250 µm. Carbon over time measured in a single particle reactor. It found that the samples can exhibit both an induction period as well gradual stop deposition. An observed for α-Al2O3 samples, but not γ-Al2...