PMC:7796291 / 13061-13216 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T117","span":{"begin":0,"end":155},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The thickness of each layer of the respirators was measured firsthand with a thickness gauge applying a pressure of 2.4 N, and is presented in Figure 1C,F."}