Particle-phase polycyclic aromatic hydrocarbon (PAHs) accounts for a large proportion of hazardous compounds in PM2.5 derived from vehicle emission. This study aimed at determining the profiles of PAHs based on tunnel measurement and urban roadside observation. The real-world vehicle emission...

The synthesis of different structures quantum dots (QDs) in a biologically friendly aqueous solution is the current trend for the preparation of nanoparticles. CdTe QDs were synthesized in aqueous by a green and environmentally friendly way with glutathione (GSH). Rod like core-shell CdTe/CdSe...

The material and microstructure of the carrier-selective layers in the perovskite solar cells are important to determining their efficiency and stability. Planar tin dioxide (p-SnO 2 ) is the most commonly used inorganic electron transport layer, but there are few reports on its mesoporous...

The mechanism of hydration of propargylic alcohols catalyzed by [Bu4P+][Im-] has been elucidated along with the carbon dioxide (CO2) as the co-catalyst. The cation is thought to be the minor role in catalysis to adjust the basicity of anion in previous study, however, it conflicts with the...

Scintillators, which convert high-energy ray into visible light, have become a research hotspot because they are extensively applied in security inspection, medical diagnostics and scientific research. However, traditional scintillation crystals suffer from the complex preparation process, high...

As significantly growing demand for noncontact temperature sensors, the exploitation of superior optical thermometers is increasingly pressing. Herein, Ba 3 Yb 4 O 9 :Er 3+ phosphors were successfully synthesized and the strategy of appropriate cation substitution (Mg 2+ , Ca 2+ , Sr 2+ ) is...

We find public directional order imbalance of in-the-money options on S&P500 (“DOI”) negatively predicts market returns over a monthly horizon, up until three months, after controlling for established sentiment measures and market return predictors. Stocks in the High-tech industry are the...

Pesticides are agricultural inputs that can significantly reduce yield losses, regulate plant growth, effectively liberate agricultural productivity, and improve food security. The availability of pesticides in economies worldwide is ensured by redistribution through international trade, with...

Board governance is an important aspect of internal bank governance. We conduct an empirical study on 100 banks in China for the period from 2004 to 2017 using a time-varying growth bank shareholder network to investigate the relationship and mechanism between bank shareholder network and board...

On-demand service platform that offers diverse service classes has allowed consumers to hail all the available services simultaneously and wait for an assignment. Such a probabilistic service-hailing mode has been widely adopted in practice, however, whether it always performs better than the...