Terpenoids from and their acetylcholinesterase inhibitory activity.

A new labdane diterpene (), two new norsesquiterpenoids (-), as well as eight known terpenoids (-) were isolated from the seeds of (Zingiberaceae). Their structures and absolute configurations were elucidated by 1D, 2D NMR, MS, and comparison of their experimental and calculated electronic circular dichroism (ECD). The acetylcholinesterase (AChE) inhibitory activities of all the isolated compounds (-) were evaluated and the result showed that compounds and had inhibitory activity against AChE, with IC values at 295.

Simulation examining the factors influencing capillary wick transport in a refrigerant direct cooling system for power battery packs.

The effectiveness of power battery refrigerant direct cooling systems of electric vehicles incorporating capillary wicks is directly determined by these wicks' transport performance. The Fries-Dreyer equation describes wicking behavior, but there is a significant gap between its predictions and the experimental results as reported in the literature. This work examines the factors influencing transport performance in an unconsolidated capillary wick with spherical particles.

Stilbenoids and Flavonoids from (L.) Millsp. and Their -Glucosidase Inhibitory Activities.

Two new stilbenoids, cajanstilbenoid C () and cajanstilbenoid D (), together with eight other known stilbenoids (-) and seventeen known flavonoids (-), were isolated from the petroleum ether and ethyl acetate portions of the 95% ethanol extract of leaves of (L.) Millsp. The planar structures of the new compounds were elucidated by NMR and high-resolution mass spectrometry, and their absolute configurations were determined by comparison of their experimental and calculated electronic circular dichroism (ECD) values.

Single-atom copper catalyst for the -arylation reaction to produce diaryl disulfides.

Single-atom Cu supported on CeO nanorod catalysts (Cu/CeO ) have been synthesized through the anchoring of copper by terminal hydroxyl groups on the CeO surface. The oxygen defect characteristics of the CeO nanorods promote electron transfer between Cu and CeO through a Ce-O-Cu interface, which realizes flexible electronic regulation of the Cu sites. Single-atom Cu species with an oxidation state of between +1 and +2 were formed, which was confirmed by X-ray photoelectron spectroscopy, X-ray fine structure spectroscopy, and electron paramagnetic resonance spectroscopy.

MIL-47(V)-derived carbon-doped vanadium oxide for selective oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran.

The development and transformation of biomass-derived platform compounds is a sustainable way to deal with the fossil fuel crisis. 5-Hydroxymethylfurfural (HMF) can be reduced or oxidized to produce many high-value compounds; however, it is challenging to effectively produce 2,5-diformylfuran (DFF) due to overoxidation. In this work, a carbon-doped VO (C-VO) material was obtained through pyrolysis of MIL-47(V) nanorods, a typical metal-organic framework material.

Lignans and Flavonoids from Cajanus cajan (L.) Millsp. and Their α-Glucosidase Inhibitory Activities.

A pair of new lignan conformers (1-2), one new flavonoid glycoside (3), as well as nineteen known compounds were purified from the twigs and leaves of Cajanus cajan (L.) Millsp..

Convenient Synthesis of a Ru Catalyst Containing Single Atoms and Nanoparticles on Nitrogen-Doped Carbon with Superior Hydrogen Evolution Reaction Activity in a Wide pH Range.

Ruthenium, which is relatively cheap in precious metals, has become a popular alternative for a hydrogen evolution reaction (HER) catalyst because of its corrosion resistance and appropriate metal-H bond strength. Convenient synthesis and active site regulation are conducive to stimulating the excellent catalytic performance of Ru as much as possible. Herein, using the mature mesoporous nitrogen-doped carbon material as the support, the catalytic materials containing both single atom Ru and Ru nanoparticles were synthesized by impregnation using the solid-phase reduction method.

Fabrication of PbS nanoparticle-sensitized TiO₂ nanotube arrays and their photoelectrochemical properties.

TiO(2) nanotube arrays (NTAs) are modified with PbS nanoparticles by successive ionic layer adsorption and reaction (SILAR) or electrodeposition, with an aim towards tuning the photoelectrochemical cell to the visible region. The PbS modification of the TiO(2) NTAs results in an increase in the visible light adsorption, however the increase in photocurrent is dependent on the modification method. PbS/TiO(2) NTAs prepared by SILAR and electrodeposition show, respectively, photocurrents of 11.