PMC:7299399 / 350-530 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T6170","span":{"begin":158,"end":159},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"abundance of engineered materials identifiable by their useful physicochemical properties through versatile chemical functionalization, nanotechnology offers a number of approaches"}