PMC:7143804 / 3821-4011 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T34","span":{"begin":0,"end":190},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"In this paper, the state-of-the-art is divided into several discussion points, i.e., the heating method, the temperature control method, and the substrate material and fabrication technique."}