Graphitic-phase CN nanosheets combined with MnO nanosheets for sensitive fluorescence quenching detection of organophosphorus pesticides.

In this study, we have developed a sensitive approach to measure organophosphorus pesticides (OPs) using graphitic-phase CN nanosheets (g-CN) combined with a nanomaterial-based quencher, MnO nanosheets (MnO NS). Since MnO NS can quench the fluorescence of g-CN via the inner-filter effect (IFE), enzymatic hydrolysate (thiocholine, TCh) can efficiently trigger the decomposition of MnO nanosheets in the presence of acetylcholinesterase (AChE) and acetylthiocholine (ATCh), resulting in the fluorescence recovery of g-CN. OPs, as inhibitors to AChE activity, can prevent the generation of TCh and decomposition of MnO nanosheets while exhibiting fluorescence quenching.

Erratum to "Analysis of Bone Mineral Density/Content of Paratroopers and Hoopsters".

[This corrects the article DOI: 10.1155/2018/6030624.].

Analysis of Bone Mineral Density/Content of Paratroopers and Hoopsters.

The different mechanical stimulus affects the bone mass and bone strength. The aim of this study was to investigate the effect of landing posture of the hoopster and paratrooper on the bone mass. In this study, 39 male participants were recruited including 13 paratroopers, 13 hoopsters, and 13 common students (control groups).