WS nanosheets-based electrochemical biosensor for highly sensitive detection of tumor marker miRNA-4484.

In this paper, a few-layer WS nanosheets-based electrochemical biosensor was fabricated for the highly sensitive detection of breast cancer tumor marker miRNA-4484. Firstly, few-layer WS nanosheets were prepared by shear stripping and characterized by SEM, TEM, AFM and UV spectrophotometer. After modification of few-layer WS nanosheets on the electrode surface, the miRNA probe was fixed on the few-layer WS nanosheets by polycytosine (PolyC).

Ambient air pollution of particles and gas pollutants, and the predicted health risks from long-term exposure to PM in Zhejiang province, China.

In recent years, ambient air has been severely contaminated by particulate matters (PMs) and some gas pollutants (nitrogen dioxide (NO) and sulfur dioxide (SO)) in China, and many studies have demonstrated that exposure to these pollutants can induce great adverse impacts on human health. The concentrations of the pollutants were much higher in winter than those in summer, and the average concentrations in this studied area were lower than those in northern China. In the comparison between high-resolution emission inventory and spatial distribution of PM, significant positive linear correlation was found.

Characteristics of ambient ozone (O) pollution and health risks in Zhejiang Province.

Troposphere ozone, which is from secondary formation processes, has been increasing dramatically during the last decades in China, inducing high health risks. In this study, temporal and spatial distribution of O was studied among 13 sites of three cities during 2014-2016. The objectives were to clarify the characteristics of the ambient pollution of O under the influence from other pollutants and meteorological parameters and the health outcomes from exposure to O.