PMC:7796291 / 9710-9967 JSONTXT

{"project":"LitCovid-PubTator","denotations":[{"id":"112","span":{"begin":6,"end":18},"obj":"Chemical"},{"id":"113","span":{"begin":77,"end":81},"obj":"Chemical"},{"id":"114","span":{"begin":134,"end":146},"obj":"Chemical"}],"attributes":[{"id":"A112","pred":"tao:has_database_id","subj":"112","obj":"MESH:C015418"},{"id":"A113","pred":"tao:has_database_id","subj":"113","obj":"MESH:D012965"},{"id":"A114","pred":"tao:has_database_id","subj":"114","obj":"MESH:C015418"}],"namespaces":[{"prefix":"Tax","uri":"https://www.ncbi.nlm.nih.gov/taxonomy/"},{"prefix":"MESH","uri":"https://id.nlm.nih.gov/mesh/"},{"prefix":"Gene","uri":"https://www.ncbi.nlm.nih.gov/gene/"},{"prefix":"CVCL","uri":"https://web.expasy.org/cellosaurus/CVCL_"}],"text":") and paraffin oil aerosol (MMD ~0.4 µm), based on the Korean MFDS standard. NaCl aerosol with a mass concentration of 8 ± 4 mg/m3 or paraffin oil aerosol with a mass concentration of 20 ± 5 mg/m3 was passed through the respirator sample at the flow rate of"}