Strong metal oxide-zeolite interactions during selective catalytic reduction of nitrogen oxides.

In response to the stricter EU VII emission standards and the "150 ℃ challenge", selective catalytic reduction by ammonia (NH-SCR) catalysts for motor vehicles are required to achieve high NO conversion below 200 °C. Compounding metal oxides with zeolites is an important strategy to design the low-temperature SCR catalysts. Here, we original prepared Cu-SSZ-13 @ MnGdO (Cu-Z @ MGO), which achieved over 90% NO conversion and 95% N selectivity at 150 ℃.

SO- and HO-Tolerant Catalytic Reduction of NO at a Low Temperature via Engineering Polymeric VO Species by CeO.

Selective catalytic reduction (SCR) of NO over VO-based oxide catalysts has been widely used, but it is still a challenge to efficiently reduce NO at low temperatures under SO and HO co-existence. Herein, SO- and HO-tolerant catalytic reduction of NO at a low temperature has been originally demonstrated via engineering polymeric VO species by CeO. The polymeric VO species were tactfully engineered on Ce-VO composite active sites via the surface occupation effect of Ce, and the obtained catalysts exhibited remarkable low-temperature activity and strong SO and HO tolerance at 250 °C.

Synergistic Catalytic Elimination of NO and Chlorinated Organics: Cooperation of Acid Sites.

The synergistic catalytic removal of NO and chlorinated volatile organic compounds under low temperatures is still a big challenge. Generally, degradation of chlorinated organics demands sufficient redox ability, which leads to low N selectivity in the selective catalytic reduction of NO by NH (NH-SCR). Herein, mediating acid sites introducing the CePO component into MnO/TiO NH-SCR catalysts was found to be an effective approach for promoting chlorobenzene degradation.

SO-Induced Alkali Resistance of FeVO/TiO Catalysts for NO Reduction.

Selective catalytic reduction of nitrogen oxides with ammonia (NH-SCR) is an efficient NO abatement strategy, but deNO catalysts suffer from serious deactivation due to the coexistence of multiple poisoning substances such as K, SO, etc. in the flue gas. It is essential to understand the interaction among various poisons and their effects on NO abatement.

Incidence and radiological pattern of eosinophilic granuloma: a retrospective study in a Chinese tertiary hospital.

Background: The incidence and radiological patterns of eosinophilic granuloma (EG) in China is not clear. We described the incidence, presentation, and imaging characteristics of Chinese EG patients in a tertiary hospital.

Methods: A retrospective chart review was performed from January 2004 to October 2017 at a single tertiary general hospital.

Improved NO Reduction in the Presence of SO by Using FeO-Promoted Halloysite-Supported CeO-WO Catalysts.

Currently, selective catalytic reduction (SCR) of NO with NH in the presence of SO by using vanadium-free catalysts is still an important issue for the removal of NO for stationary sources. Developing high-performance catalysts for NO reduction in the presence of SO is a significant challenge. In this work, a series of FeO-promoted halloysite-supported CeO-WO catalysts were synthesized by a molten salt treatment followed by the impregnation method and demonstrated improved NO reduction in the presence of SO.

Structural and functional brain changes in perimenopausal women who are susceptible to migraine: a study protocol of multi-modal MRI trial.

Background: As a common clinical symptom that often bothers midlife females, migraine is closely associated with perimenopause. Previous studies suggest that one of the most prominent triggers is the sudden decline of estrogen during perimenopausal period. Hormone replacement therapy (HRT) is widely used to prevent this suffering in perimenopausal women, but effective diagnostic system is lacked for quantifying the severity of the diseaase.

Water-bath assisted convective assembly of aligned silver nanowire films for transparent electrodes.

Manipulating Ag nanowire (AgNW) assembly to tailor the opto-electrical properties and surface morphology could improve the performance of next-generation transparent conductive electrodes. In this paper, we demonstrated a water-bath assisted convective assembly process at the temporary water/alcohol interface for fabricating hierarchical aligned AgNW electrodes. The convection flow plays an important role during the assembly process.

[Effects of paclitaxel and 5-fluorouracil on growth inhibition and apoptosis of hepatoma cells: a comparative study].

Objective: To investigate the effect of paclitaxel and 5-flurouracil (5-Fu) on growth inhibition and apoptosis of human hepatoma BEL-7402 cells.

Methods: Growth inhibition of BEL-7402 cells treated with paclitaxel and 5-Fu, respectively, was measured by ATP-tumor chemosensitivity assay (ATP-TCA), and the cell cycle kinetics and apoptosis were analyzed by flow cytometry and microscopic examination.

Results: BEL-7402 cells were highly sensitive to paclitaxel with growth inhibition observed in both dose- and time-dependent manners (IC(50)=5.