PMC:7796291 / 20781-20963 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T169","span":{"begin":67,"end":71},"obj":"Sentence"},{"id":"T170","span":{"begin":72,"end":93},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"wed neither noxious residues nor distinctive hydrophilic bonding.\n\n3.3. Mechanical Filtration\nThe particle capture of an electret filter is contributed by both mechanical and electro"}