{"id":"https://openalex.org/W2016541190","doi":"https://doi.org/10.1021/ja00733a050","title":"Problem with carbon-13 intensities in proton-decoupled nuclear magnetic resonance spectra. Undermining the Overhauser effect with free radicals","display_name":"Problem with carbon-13 intensities in proton-decoupled nuclear magnetic resonance spectra. Undermining the Overhauser effect with free radicals","publication_year":1971,"publication_date":"1971-02-01","ids":{"openalex":"https://openalex.org/W2016541190","doi":"https://doi.org/10.1021/ja00733a050","mag":"2016541190"},"language":"en","primary_location":{"id":"doi:10.1021/ja00733a050","doi":"https://doi.org/10.1021/ja00733a050","is_oa":false,"landing_page_url":"https://doi.org/10.1021/ja00733a050","pdf_url":null,"source":{"id":"https://openalex.org/S111155417","display_name":"Journal of the American Chemical Society","issn_l":"0002-7863","issn":["0002-7863","1520-5126","1943-2984"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-a","jufo-3","ki-jl-3","medline","norway-2","poland-200","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320006","host_organization_name":"American Chemical Society","host_organization_lineage":["https://openalex.org/P4310320006"],"host_organization_lineage_names":["American Chemical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of the American Chemical Society","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5113449542","display_name":"Gerd N. La Mar","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Gerd N. La Mar","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":["https://openalex.org/A5113449542"],"corresponding_institution_ids":[],"apc_list":{"value":4500,"currency":"USD","value_usd":4500},"apc_paid":null,"fwci":9.916,"has_fulltext":false,"cited_by_count":65,"citation_normalized_percentile":{"value":0.99157445,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"93","issue":"4","first_page":"1040","last_page":"1041"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11809","display_name":"Advanced NMR Techniques and Applications","score":0.9970999956130981,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11809","display_name":"Advanced NMR Techniques and Applications","score":0.9970999956130981,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12748","display_name":"Molecular spectroscopy and chirality","score":0.0008999999845400453,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12381","display_name":"Electron Spin Resonance Studies","score":0.0005000000237487257,"subfield":{"id":"https://openalex.org/subfields/1304","display_name":"Biophysics"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/13c-nmr-spectroscopy","display_name":"13C NMR","score":0.7559999823570251},{"id":"https://openalex.org/keywords/overhauser-effect","display_name":"Overhauser effect","score":0.8949999809265137},{"id":"https://openalex.org/keywords/free-radicals","display_name":"free radicals","score":0.9739999771118164},{"id":"https://openalex.org/keywords/signal-intensity","display_name":"signal intensity","score":0.5139999985694885},{"id":"https://openalex.org/keywords/spin-spin-coupling","display_name":"spin-spin coupling","score":0.3959999978542328},{"id":"https://openalex.org/keywords/paramagnetic-effects","display_name":"paramagnetic effects","score":0.31299999356269836}],"concepts":[{"id":"https://openalex.org/C2778447006","wikidata":"https://www.wikidata.org/wiki/Q1156474","display_name":"Icon","level":2,"score":0.6129987835884094},{"id":"https://openalex.org/C119851462","wikidata":"https://www.wikidata.org/wiki/Q901095","display_name":"Nuclear Overhauser effect","level":3,"score":0.5601736903190613},{"id":"https://openalex.org/C4839761","wikidata":"https://www.wikidata.org/wiki/Q212111","display_name":"Spectral line","level":2,"score":0.5121450424194336},{"id":"https://openalex.org/C2778805511","wikidata":"https://www.wikidata.org/wiki/Q1713","display_name":"Citation","level":2,"score":0.48914793133735657},{"id":"https://openalex.org/C54516573","wikidata":"https://www.wikidata.org/wiki/Q2294","display_name":"Proton","level":2,"score":0.4718209207057953},{"id":"https://openalex.org/C518677369","wikidata":"https://www.wikidata.org/wiki/Q202833","display_name":"Social media","level":2,"score":0.42384853959083557},{"id":"https://openalex.org/C46141821","wikidata":"https://www.wikidata.org/wiki/Q209402","display_name":"Nuclear magnetic resonance","level":1,"score":0.42202073335647583},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.39122605323791504},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.3823155164718628},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.34370627999305725},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.3420388698577881},{"id":"https://openalex.org/C185544564","wikidata":"https://www.wikidata.org/wiki/Q81197","display_name":"Nuclear physics","level":1,"score":0.23066192865371704},{"id":"https://openalex.org/C161191863","wikidata":"https://www.wikidata.org/wiki/Q199655","display_name":"Library science","level":1,"score":0.205515056848526},{"id":"https://openalex.org/C66974803","wikidata":"https://www.wikidata.org/wiki/Q10359898","display_name":"Nuclear magnetic resonance spectroscopy","level":2,"score":0.19013753533363342},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.17316022515296936},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.127566397190094},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1021/ja00733a050","doi":"https://doi.org/10.1021/ja00733a050","is_oa":false,"landing_page_url":"https://doi.org/10.1021/ja00733a050","pdf_url":null,"source":{"id":"https://openalex.org/S111155417","display_name":"Journal of the American Chemical Society","issn_l":"0002-7863","issn":["0002-7863","1520-5126","1943-2984"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-a","jufo-3","ki-jl-3","medline","norway-2","poland-200","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320006","host_organization_name":"American Chemical Society","host_organization_lineage":["https://openalex.org/P4310320006"],"host_organization_lineage_names":["American Chemical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of the American Chemical Society","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2033160383","https://openalex.org/W1998336567","https://openalex.org/W1981827693","https://openalex.org/W1964197478","https://openalex.org/W176059360","https://openalex.org/W2086301096","https://openalex.org/W2079744575","https://openalex.org/W3005452455","https://openalex.org/W2019235808","https://openalex.org/W2330908440"],"abstract_inverted_index":{"ADVERTISEMENT":[0],"RETURN":[1],"TO":[2],"ISSUEPREVArticleNEXTProblem":[3],"with":[4,17,139,174],"carbon-13":[5],"intensities":[6],"in":[7],"proton-decoupled":[8],"nuclear":[9],"magnetic":[10],"resonance":[11],"spectra.":[12],"Undermining":[13],"the":[14,54,85,90,119,130,143,146,151,158,164],"Overhauser":[15],"effect":[16],"free":[18],"radicalsGerd":[19],"N.":[20],"La":[21],"MarCite":[22],"this:":[23],"J.":[24],"Am.":[25],"Chem.":[26],"Soc.":[27],"1971,":[28],"93,":[29],"4,":[30],"1040\u20131041Publication":[31],"Date":[32],"(Print):February":[33],"1,":[34],"1971Publication":[35],"History":[36],"Published":[37],"online1":[38],"May":[39],"2002Published":[40],"inissue":[41],"1":[42],"February":[43],"1971https://pubs.acs.org/doi/10.1021/ja00733a050https://doi.org/10.1021/ja00733a050research-articleACS":[44],"PublicationsRequest":[45],"reuse":[46],"permissionsArticle":[47],"Views100Altmetric-Citations51LEARN":[48],"ABOUT":[49],"THESE":[50],"METRICSArticle":[51],"Views":[52],"are":[53,76,89],"COUNTER-compliant":[55],"sum":[56],"of":[57,92,118],"full":[58],"text":[59],"article":[60,124],"downloads":[61],"since":[62],"November":[63],"2008":[64],"(both":[65],"PDF":[66],"and":[67,72,101,145,162,178,180],"HTML)":[68],"across":[69],"all":[70],"institutions":[71],"individuals.":[73],"These":[74],"metrics":[75],"regularly":[77],"updated":[78,102],"to":[79,84],"reflect":[80],"usage":[81],"leading":[82],"up":[83],"last":[86],"few":[87],"days.Citations":[88],"number":[91],"other":[93],"articles":[94],"citing":[95],"this":[96],"article,":[97],"calculated":[98],"by":[99],"Crossref":[100,108],"daily.":[103],"Find":[104,154],"more":[105,155],"information":[106,156],"about":[107,142],"citation":[109],"counts.The":[110],"Altmetric":[111,159],"Attention":[112,160],"Score":[113,161],"is":[114,166],"a":[115,122,135],"quantitative":[116],"measure":[117],"attention":[120],"that":[121],"research":[123],"has":[125],"received":[126],"online.":[127],"Clicking":[128],"on":[129,157],"donut":[131],"icon":[132],"will":[133],"load":[134],"page":[136],"at":[137],"altmetric.com":[138],"additional":[140],"details":[141],"score":[144,165],"social":[147],"media":[148],"presence":[149],"for":[150],"given":[152],"article.":[153],"how":[163],"calculated.":[167],"Share":[168,183],"Add":[169],"toView":[170],"InAdd":[171],"Full":[172],"Text":[173],"ReferenceAdd":[175],"Description":[176],"ExportRISCitationCitation":[177],"abstractCitation":[179],"referencesMore":[181],"Options":[182],"onFacebookTwitterWechatLinked":[184],"InRedditEmail":[185],"Other":[186],"access":[187],"optionsGet":[188],"e-Alertsclose":[189],"Get":[190],"e-Alerts":[191]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2015,"cited_by_count":1}],"updated_date":"2026-09-23T05:00:35.095934","created_date":"2016-06-24T00:00:00"}
