PMC:7299399 / 75997-76165 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T301","span":{"begin":0,"end":168},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Diffusion is the final important mechanism of particle removal, and it is most effective at removing very fine particles less than 200 nm, especially at low flow rates."}