CORD-19:a6d3a75a05c35723193e5240b3ebd2a01a77f4d2 / 20978-21097 JSONTXT

{"project":"CORD-19-Sentences","denotations":[{"id":"TextSentencer_T153","span":{"begin":0,"end":119},"obj":"Sentence"},{"id":"TextSentencer_T153","span":{"begin":0,"end":119},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Ultrathin sections were cut, double-stained with uranyl acetate-lead citrate, and observed under a JEM-1200EX (JEOL Co."}