PMC:7796291 / 21457-21612 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T174","span":{"begin":0,"end":155},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The performance above this level of filtration for the untreated respirators A and B is considered as the electrostatic capture mechanism (electr. cont’n)."}