ROME — Pope Francis was in critical condition Saturday after he suffered a long asthmatic respiratory crisis that required high flows of oxygen, the Vatican said. The 88-year-old Francis ...

Department of Chemistry and Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstr. 4, 85747 Garching, Germany ...

An article published this week in The Lancet medical journal found that more than half of the world’s population lacks access to safe and affordable medical oxygen services, and most people ...

School of Physics and Electrical Engineering, Linyi University, Linyi 276000, P. R. China School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China ...