PMC:7574920 / 10724-10815 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T102","span":{"begin":24,"end":26},"obj":"http://purl.obolibrary.org/obo/CLO_0001000"}],"text":"For time points \u003e 30 to 35 min, the negative control frequently became yellowish (Fig. 1A)."}

{"project":"LitCovid-sentences","denotations":[{"id":"T68","span":{"begin":0,"end":91},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"For time points \u003e 30 to 35 min, the negative control frequently became yellowish (Fig. 1A)."}