PMC:7594251 / 15723-16091 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7594251","sourcedb":"PMC","sourceid":"7594251","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7594251","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","divisions":[{"label":"title","span":{"begin":39,"end":56}}],"tracks":[{"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"}],"attributes":[{"subj":"T85300","pred":"source","obj":"LitCovid-PD-CLO"},{"subj":"T32942","pred":"source","obj":"LitCovid-PD-CLO"}]},{"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"},{"subj":"T119","pred":"source","obj":"LitCovid-PD-CHEBI"},{"subj":"T120","pred":"source","obj":"LitCovid-PD-CHEBI"}]},{"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"},{"subj":"141","pred":"source","obj":"LitCovid-PubTator"},{"subj":"167","pred":"source","obj":"LitCovid-PubTator"},{"subj":"168","pred":"source","obj":"LitCovid-PubTator"},{"subj":"169","pred":"source","obj":"LitCovid-PubTator"},{"subj":"170","pred":"source","obj":"LitCovid-PubTator"},{"subj":"171","pred":"source","obj":"LitCovid-PubTator"}],"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_"}]},{"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#"}],"attributes":[{"subj":"T111","pred":"source","obj":"LitCovid-sentences"},{"subj":"T112","pred":"source","obj":"LitCovid-sentences"},{"subj":"T113","pred":"source","obj":"LitCovid-sentences"},{"subj":"T114","pred":"source","obj":"LitCovid-sentences"}]}],"config":{"attribute types":[{"pred":"source","value type":"selection","values":[{"id":"LitCovid-PD-CLO","color":"#ecec93","default":true},{"id":"LitCovid-PD-CHEBI","color":"#d293ec"},{"id":"LitCovid-PubTator","color":"#93ecb8"},{"id":"LitCovid-sentences","color":"#ec9e93"}]}]}}