PMC:7796291 / 17776-18002 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T151","span":{"begin":0,"end":226},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The surface potential of the untreated filter webs from respirators A and B ranged from −1.6 kV to +4.4 kV, and these surface charges contributed to particle capture either by coulombic attraction or induced polarization [46]."}