PMC:7454258 / 45787-45945 JSONTXT

{"project":"LitCovid-PD-CHEBI","denotations":[{"id":"T62","span":{"begin":80,"end":88},"obj":"Chemical"},{"id":"T63","span":{"begin":99,"end":107},"obj":"Chemical"},{"id":"T64","span":{"begin":125,"end":137},"obj":"Chemical"}],"attributes":[{"id":"A62","pred":"chebi_id","subj":"T62","obj":"http://purl.obolibrary.org/obo/CHEBI_33284"},{"id":"A63","pred":"chebi_id","subj":"T63","obj":"http://purl.obolibrary.org/obo/CHEBI_46662"},{"id":"A64","pred":"chebi_id","subj":"T64","obj":"http://purl.obolibrary.org/obo/CHEBI_143130"}],"text":"Materials (SRMs) for the determination of trace element content, including both nutrient elements (minerals) and toxic metal contaminants. National Oceanic an"}