PMC:7115396 / 16640-16861 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T216","span":{"begin":6,"end":8},"obj":"http://purl.obolibrary.org/obo/CLO_0050510"},{"id":"T217","span":{"begin":10,"end":12},"obj":"http://purl.obolibrary.org/obo/CLO_0050507"},{"id":"T218","span":{"begin":158,"end":163},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"}],"text":", 14, 18, 22, 26, and 30 dpi and stored at −80 °C. After freezing and thawing three times and centrifuging at 8,000 × g for 5 min at 4 °C, relative amount of virus present in 200 μL of supernatants of each sample was quan"}