Upconverted persistent luminescent ZnGaSnO: Cr, Yb, Er phosphor for composite anti-counterfeiting ink.

Herein, a novel colorless anti-counterfeiting luminous ink composite material, to the best of our knowledge, was prepared by incorporating upconverted persistent luminescent :1, 5, 0.5 (ZGSO: Cr,Yb,Er) phosphors into a resin solution, followed by stirring. Owing to its small particle size and uniform distribution, ZGSO: Cr, Yb, Er exhibits long-lasting, persistent near-infrared emission at 696 nm following the stoppage of excitation by a 274 nm ultraviolet light and a 980 nm excitation.

Identification of a highly conserved and surface exposed B-cell epitope on the nucleoprotein of influenza A virus.

Influenza virus still poses a major threat to human health worldwide. The nucleoprotein (NP) of influenza A virus plays an essential role in the viral replication and transcription and hence becomes a promising therapeutic target. NP forms a complicated conformation under native conditions and might denature when performing immunoassays such as western blot in the study of NP function.