PMC:7594251 / 15723-16091 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T85300","span":{"begin":79,"end":82},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"},{"id":"T32942","span":{"begin":83,"end":84},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":", or 31P for resolution improvements.\n\n2.1.2. 1D 13C-NMR\nCompared with 1H, 13C has a much higher chemical shift dispersion (~200 ppm), however the natural abundance of 13C is low (1.1%). Additionally, the gyromagnetic ratio is ~4 times weaker than 1H and therefore 13C spectra are far more difficult to obtain especially for less concentrated samples. There are some p"}

{"project":"LitCovid-PD-CHEBI","denotations":[{"id":"T119","span":{"begin":71,"end":73},"obj":"Chemical"},{"id":"T120","span":{"begin":248,"end":250},"obj":"Chemical"}],"attributes":[{"id":"A119","pred":"chebi_id","subj":"T119","obj":"http://purl.obolibrary.org/obo/CHEBI_49637"},{"id":"A120","pred":"chebi_id","subj":"T120","obj":"http://purl.obolibrary.org/obo/CHEBI_49637"}],"text":", or 31P for resolution improvements.\n\n2.1.2. 1D 13C-NMR\nCompared with 1H, 13C has a much higher chemical shift dispersion (~200 ppm), however the natural abundance of 13C is low (1.1%). Additionally, the gyromagnetic ratio is ~4 times weaker than 1H and therefore 13C spectra are far more difficult to obtain especially for less concentrated samples. There are some p"}

{"project":"LitCovid-PubTator","denotations":[{"id":"141","span":{"begin":46,"end":52},"obj":"Chemical"},{"id":"167","span":{"begin":71,"end":73},"obj":"Chemical"},{"id":"168","span":{"begin":75,"end":78},"obj":"Chemical"},{"id":"169","span":{"begin":168,"end":171},"obj":"Chemical"},{"id":"170","span":{"begin":248,"end":250},"obj":"Chemical"},{"id":"171","span":{"begin":265,"end":268},"obj":"Chemical"}],"attributes":[{"id":"A168","pred":"tao:has_database_id","subj":"168","obj":"MESH:C000615229"},{"id":"A169","pred":"tao:has_database_id","subj":"169","obj":"MESH:C000615229"},{"id":"A171","pred":"tao:has_database_id","subj":"171","obj":"MESH:C000615229"}],"namespaces":[{"prefix":"Tax","uri":"https://www.ncbi.nlm.nih.gov/taxonomy/"},{"prefix":"MESH","uri":"https://id.nlm.nih.gov/mesh/"},{"prefix":"Gene","uri":"https://www.ncbi.nlm.nih.gov/gene/"},{"prefix":"CVCL","uri":"https://web.expasy.org/cellosaurus/CVCL_"}],"text":", or 31P for resolution improvements.\n\n2.1.2. 1D 13C-NMR\nCompared with 1H, 13C has a much higher chemical shift dispersion (~200 ppm), however the natural abundance of 13C is low (1.1%). Additionally, the gyromagnetic ratio is ~4 times weaker than 1H and therefore 13C spectra are far more difficult to obtain especially for less concentrated samples. There are some p"}

{"project":"LitCovid-sentences","denotations":[{"id":"T111","span":{"begin":39,"end":45},"obj":"Sentence"},{"id":"T112","span":{"begin":46,"end":56},"obj":"Sentence"},{"id":"T113","span":{"begin":57,"end":186},"obj":"Sentence"},{"id":"T114","span":{"begin":187,"end":351},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":", or 31P for resolution improvements.\n\n2.1.2. 1D 13C-NMR\nCompared with 1H, 13C has a much higher chemical shift dispersion (~200 ppm), however the natural abundance of 13C is low (1.1%). Additionally, the gyromagnetic ratio is ~4 times weaker than 1H and therefore 13C spectra are far more difficult to obtain especially for less concentrated samples. There are some p"}