The total withdrawal operation is an inevitable section in cyclic total reflux batch distillation.In the operation,an interesting phenomenon “overhead concentr
β-NaYF4:Yb,Er upconversion nanophosphor (UCNP) is known as one of the most efficient NIR-to-visible upconversion materials, which shows great potential in bioa
The Kingdom of Guge, an ancient civilization prospering in Ngari, Tibet more than 1000 years ago,mysteriously disappeared 350 years ago,
The Kingdom of Guge, a