Graphdiyne-Supported NiFe Layered Double Hydroxide Nanosheets as Functional Electrocatalysts for Oxygen Evolution

Graphdiyne (GDY), a novel two-dimensional full-carbon material, has attracted lots of attention because of its high conjugated system comprising sp² and sp-hybridized carbons. The distinctive structure characteristics endow it unique electronic structure, uniform distributed pores and excellent chemical stability. A novel GDY-supported NiFe layered double hydroxide (LDH) composite was successfully prepared for the first time. By taking advantage of the increased surface active areas and improved conductivity, the designed hierarchical GDY@NiFe composite exhibits outstanding catalytic activity that only required a small overpotential about 260 mV to achieve the current density of 10 mA cm^–2. The nanocomposite shows excellent durability in alkaline medium implying a superior OER electrocatalytic activity. It is anticipated that the as-prepared GDY@NiFe composite electrocatalyst provide new insights in designing graphdiyne-supported electrocatalyst materials for oxygen evolution application

Effects of H₂O Dilution on NO_<i>x</i> Emissions of Methane-Added Ammonia Oxidation

For the NH3/CH4 combustion in a furnace, the reactant jets entrain the combustion products containing H2O, and the combustion occurs with H2O dilution. Previous literature indicates that the effect of H2O on NOx emissions from NH3/CH4 oxidation is significant. This study systematically compares the oxidation of NH3/CH4 using a jet-stirred reactor (JSR) with N2 and H2O dilution. The impacts of temperature (T), equivalence ratio (Φ), H2O volume fraction (XH2O), and the CH4/NH3 ratio (by volume) are experimentally and numerically investigated. The NO generation is enhanced as the T or CH4/NH3 ratio elevates, while it is hindered with higher Φ or XH2O. The concentration of N2O is comparable to NO concentration with T XH2O = 20%, the maximum N2O concentration is observed when T = 1325 K, Φ = 0.5, and CH4/NH3 ratio = 0.33. The presence of 20% H2O leads to a reduction of 54.6% in NO and 47.3% in CO at T = 1375 K and Φ = 0.9. To minimize the NOx formation and NH3 slip, the suggested conditions for NH3/CH4 oxidation are identified. The presence of H2O significantly influences NOx formation in NH3/CH4 oxidation, and this work provides new insights into NH3/CH4 oxidation in the dilution of H2O

Effects of H₂O Dilution on NO_<i>x</i> Emissions of Methane-Added Ammonia Oxidation

For the NH3/CH4 combustion in a furnace, the reactant jets entrain the combustion products containing H2O, and the combustion occurs with H2O dilution. Previous literature indicates that the effect of H2O on NOx emissions from NH3/CH4 oxidation is significant. This study systematically compares the oxidation of NH3/CH4 using a jet-stirred reactor (JSR) with N2 and H2O dilution. The impacts of temperature (T), equivalence ratio (Φ), H2O volume fraction (XH2O), and the CH4/NH3 ratio (by volume) are experimentally and numerically investigated. The NO generation is enhanced as the T or CH4/NH3 ratio elevates, while it is hindered with higher Φ or XH2O. The concentration of N2O is comparable to NO concentration with T XH2O = 20%, the maximum N2O concentration is observed when T = 1325 K, Φ = 0.5, and CH4/NH3 ratio = 0.33. The presence of 20% H2O leads to a reduction of 54.6% in NO and 47.3% in CO at T = 1375 K and Φ = 0.9. To minimize the NOx formation and NH3 slip, the suggested conditions for NH3/CH4 oxidation are identified. The presence of H2O significantly influences NOx formation in NH3/CH4 oxidation, and this work provides new insights into NH3/CH4 oxidation in the dilution of H2O

Effects of H₂O Dilution on NO_<i>x</i> Emissions of Methane-Added Ammonia Oxidation

For the NH3/CH4 combustion in a furnace, the reactant jets entrain the combustion products containing H2O, and the combustion occurs with H2O dilution. Previous literature indicates that the effect of H2O on NOx emissions from NH3/CH4 oxidation is significant. This study systematically compares the oxidation of NH3/CH4 using a jet-stirred reactor (JSR) with N2 and H2O dilution. The impacts of temperature (T), equivalence ratio (Φ), H2O volume fraction (XH2O), and the CH4/NH3 ratio (by volume) are experimentally and numerically investigated. The NO generation is enhanced as the T or CH4/NH3 ratio elevates, while it is hindered with higher Φ or XH2O. The concentration of N2O is comparable to NO concentration with T XH2O = 20%, the maximum N2O concentration is observed when T = 1325 K, Φ = 0.5, and CH4/NH3 ratio = 0.33. The presence of 20% H2O leads to a reduction of 54.6% in NO and 47.3% in CO at T = 1375 K and Φ = 0.9. To minimize the NOx formation and NH3 slip, the suggested conditions for NH3/CH4 oxidation are identified. The presence of H2O significantly influences NOx formation in NH3/CH4 oxidation, and this work provides new insights into NH3/CH4 oxidation in the dilution of H2O

Effects of H₂O Dilution on NO_<i>x</i> Emissions of Methane-Added Ammonia Oxidation

For the NH3/CH4 combustion in a furnace, the reactant jets entrain the combustion products containing H2O, and the combustion occurs with H2O dilution. Previous literature indicates that the effect of H2O on NOx emissions from NH3/CH4 oxidation is significant. This study systematically compares the oxidation of NH3/CH4 using a jet-stirred reactor (JSR) with N2 and H2O dilution. The impacts of temperature (T), equivalence ratio (Φ), H2O volume fraction (XH2O), and the CH4/NH3 ratio (by volume) are experimentally and numerically investigated. The NO generation is enhanced as the T or CH4/NH3 ratio elevates, while it is hindered with higher Φ or XH2O. The concentration of N2O is comparable to NO concentration with T XH2O = 20%, the maximum N2O concentration is observed when T = 1325 K, Φ = 0.5, and CH4/NH3 ratio = 0.33. The presence of 20% H2O leads to a reduction of 54.6% in NO and 47.3% in CO at T = 1375 K and Φ = 0.9. To minimize the NOx formation and NH3 slip, the suggested conditions for NH3/CH4 oxidation are identified. The presence of H2O significantly influences NOx formation in NH3/CH4 oxidation, and this work provides new insights into NH3/CH4 oxidation in the dilution of H2O

Compressed nerve roots in patients with foot drop.

<p>L5 nerve root was most frequently affected. Double or triple roots compression was a common condition.</p

A 54-years-old man, diagnosed as LDH and left foot drop.

<p>(A) Preoperative radiography. (B) Preoperative mid-sagittal MRI showed LDH on L4-S1. (C) Preoperative axial MRI of L4-5 showed the left L5 nerve root compression. (D) Preoperative axial MRI of L5-S1 showed the left S1 nerve root compression. (E) Postoperative radiography.</p

Enhanced Activity and Stability of Carbon-Decorated Cuprous Oxide Mesoporous Nanorods for CO₂ Reduction in Artificial Photosynthesis

The development of photocatalysts with superior activity and stability to produce organic fuels through CO₂ reduction under renewable sunlight is of great significance due to the depletion of fossil fuels and severe environmental problems. In this study, we presented a “hitting three birds with one stone” strategy to synthesize carbon layer coated cuprous oxide (Cu₂O) mesoporous nanorods on Cu foils via a facile chemical oxidation and subsequent carbonization method. The thin carbon layer not only works as a protective layer to quench the common photocorrosion problem of Cu₂O but also endows the sample a mesoporous and one-dimensional nanorod structure, which can facilitate reactant molecule adsorption and charge carrier transfer. Substantially, the coated samples exhibited remarkably improved stability as well as decent activity for CO₂ reduction under visible light irradiation. The optimized sample attained an apparent quantum efficiency of 2.07% for CH₄ and C₂H₄ at λ₀ 400 nm, and 93% activity remained after six photoreduction cycles under visible light. This work provides a facile strategy to address the stability and activity issues of Cu₂O under visible light irradiation, which is presumably suitable for other semiconductors as promising candidates for CO₂ reduction in artificial photosynthesis

LOX polymorphisms in osteosarcoma patients and controls.

*<p>p<0.0167 was considered significant after Bonferroni correction. LOX, lysyl oxidase; OR, odds ratio; CI, confidence interval.</p

Stratification analysis of <i>LOX</i> polymorphisms in osteosarcoma patients.

<p>p<0.0167 was considered significant after Bonferroni correction. LOX, lysyl oxidase; OR, odds ratio; CI, confidence interval. L: long tubular bones. A: axial skeleton.</p