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In order to solve the problem that the high-temperature denitration catalyst has narrow temperature range and the property of easy deactivation and poisoning, MnOx-TiO2 catalyst doped with Fe and Ce of low temperature denitration was prepared m this paper. The temperature range of 0.08Fe0.05Ce/MnOx-TiO2 catalyst whose denitrification efficiency achieved above 90% was the widest of 99-374 °C,. XRD and BET analysis showed that the dispersibility of the active component of the catalyst on the Ti(X carrier and the specific surface area of the catalyst increased. XPS analysis showed that the chemical adsorption oxygen on the surface increased, Mn existed m the form of MnO2 and Mn2O3, and the addition of Ce and Fe promoted the conversion between MnO2 and Mn2O3, which was beneficial to the denitration reaction. The results of H2-TPR and NH3-TPT) analysis showed that the weak acid and medium-strong acid content on the catalyst surface increased, and the low-temperature redox ability improved. [ABSTRACT FROM AUTHOR]

The aim of the present study was to determine the function of microRNA-153 (miR-153) in the viability of nasopharyngeal cancer (NPC) cells and determine the underlying molecular mechanism. The expression of miR-153 in patients with NPC was markedly decreased compared with that in paracarcinoma tissue. miR-153 upregulation observably decreased cell viability, induced apoptosis, increased caspase-3 and −9 activity, and increased the B-cell lymphoma 2 (Bcl-2)-associated X protein/Bcl-2 protein expression ratio in 13–9B cells. miR-153 upregulation also suppressed transforming growth factor-β2 (TGF-β2) and Smad2 protein expression in 13-9B cells. TGF-β2 inhibitor enhanced the effect of miR-153 upregulation on the inhibition of cell viability, induction of apoptosis, increase in caspase-3 and −9 activity, and increase in Bax/Bcl-2 protein expression ratio in 13-9B cells. The results of the present study indicate that miR-153 affects the progression of NPC by targeting the TGF-β2/Smad2 signaling pathway. [ABSTRACT FROM AUTHOR]

CeCl3 solution was used as a precursor to prepare CeO2 microspheres by ultrasonic spray pyrolysis (USP). This is a green process that allows the transformation from CeCl3 to CeO2 without consuming any precipitant. The prepared material was investigated through various analysis technologies, such as X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high resolution TEM (HRTEM), energy dispersive X-ray spectroscopy (EDS), N2 adsorption-desorption and X-ray photoelectron spectroscopy (XPS). The prepared sample was confirmed as high purity CeO2 microspheres, and two different microstructures were observed. The microsphere surface area was 86.5 m2/g according to the Brunauer-Emmett-Teller method. The microsphere diameter ranged from 0.09 μm to 3.86 μm and the microsphere surface was covered by numerous nanoparticles. The observed nanoparticles ranged in size from 19 nm to 200 nm as determined from FESEM and HRTEM images. The concentrations of Ce4+, Ce3+, residual chloride and oxygen vacancy in CeO2 were studied by relative sensitivity factors based on the XPS results. Finally, the data suggested the possible formation mechanism of the CeO2 microsphere structure. [ABSTRACT FROM AUTHOR]

Abstract: Motion vision is crucial in the life of animals, in controlling locomotion, in foraging, for predator evasion and in communication. However, information on the conditions for motion vision in natural environments is limited. Advancing knowledge of the ecological limitations that affect functional behaviour requires novel methodologies. To explore motion ecology in more detail we describe an innovative method that integrates evolutionary biology with digital arts. A visualization tool that simulates three spatial dimensions plus movement through time, 3D animation is an innovative approach to understand dynamic environments. Animal signalling systems have provided useful insights into ecological limitations on behaviour, and we demonstrate the utility of our approach by examining motion displays of lizards surrounded by plant motion noise. The effectiveness of signals in noise was considered under different circumstances, and in each case, we had complete control over the simulations. We used these scenarios to both validate our approach and to demonstrate its potential. The relevance to motion signalling of prevailing wind and resultant plant motion is now well established and we begin by replicating this effect and illustrate how we can explore this in quantitative detail. We further demonstrate its utility by providing novel insights into the benefits of signalling in the right place and at the right time, by manipulating immediate signalling backgrounds, variation in signaller–plant distances and light environments. Each of these simulations provide opportunities for investigation that would be impossible in nature. Systematic measurements of motion ecology in detail are now achievable. In addition to insights into the evolution of motion signals, 3D environmental reconstruction will provide a test bed for other topics in the field of motion ecology, and a resource to enhance public engagement with science. [ABSTRACT FROM AUTHOR]