Application of CuO-FeO Nanocatalysts in Ethynylation of Formaldehyde.

Composite nanomaterials have been widely used in catalysis because of their attractive properties and various functions. Among them, the preparation of composite nanomaterials by redox has attracted much attention. In this work, pure CuO was prepared by liquid phase reduction with Cu(NO) as the copper source, NaOH as a precipitator, and sodium ascorbate as the reductant.

Ethynylation of Formaldehyde over CuO/SiO Catalysts Modified by Mg Species: Effects of the Existential States of Mg Species.

The highly effective catalytic synthesis of 1,4-butynediol (BD) from the Reppe process is a fascinating technology in modern chemical industry. In this work, we reported the effects of the existential states of Mg species in the CuO/silica-magnesia catalysts for the ethynylation of formaldehyde in a simulative slurry reactor. The physichemical properties of the supports and the corresponding catalysts were extensively characterized by various techniques.

Ethynylation of Formaldehyde over Binary Cu-Based Catalysts: Study on Synergistic Effect between Cu Species and Acid/Base Sites.

Most studies on the Cu-based catalysts in the ethynylation of formaldehyde are merely focused on the tuning of electronic configuration and dispersion of the Cu species. So far, little attention has been paid to the synergy between Cu species and promoters. Herein, binary nano-CuO-MO catalysts (M = Si, Al, and Mg) were synthesized and the effects of the promoter on the surface basicity/acidity were systematically studied as well as the ethynylation performance of the nano-CuO-based catalysts.

Regulation of Cu Species in CuO/SiO and Its Structural Evolution in Ethynylation Reaction.

A Cu-based nano-catalyst has been widely used in the ethynylation of formaldehyde; however, the effects of the presence of Cu on the reaction have not yet been reported. CuO/SiO catalysts with different Cu species were prepared by impregnation (IM), deposition-precipitation (DP), and ammonia evaporation (AE). The structural evolution of the Cu species in different states of the ethynylation reaction and the structure-activity relationship between the existence state of the Cu species and the catalytic properties of the ethynylation reaction were studied.

GPU acceleration of optical mapping algorithm for cardiac electrophysiology.

Optical mapping is an increasingly popular tool for experimentally analyzing the electrical activity in the heart. The optical mapping algorithm is computationally intense and consumes a considerable amount of time even with a highly optimized program running on a state-of-the-art multi-core microprocessor. For example, one second of data requires approximately 5 minutes of computation time (3.

Strategies for implementing hardware-assisted high-throughput cellular image analysis.

Recent advances in imaging technology for biomedicine, including high-speed microscopy, automated microscopy, and imaging flow cytometry are poised to have a large impact on clinical diagnostics, drug discovery, and biological research. Enhanced acquisition speed, resolution, and automation of sample handling are enabling researchers to probe biological phenomena at an increasing rate and achieve intuitive image-based results. However, the rich image sets produced by these tools are massive, possessing potentially millions of frames with tremendous depth and complexity.