{"id":"https://openalex.org/W2091964762","doi":"https://doi.org/10.1177/00220345700490010401","title":"Lipids and Fatty Acids in Fossil Teeth","display_name":"Lipids and Fatty Acids in Fossil Teeth","publication_year":1970,"publication_date":"1970-01-01","ids":{"openalex":"https://openalex.org/W2091964762","doi":"https://doi.org/10.1177/00220345700490010401","mag":"2091964762","pmid":"https://pubmed.ncbi.nlm.nih.gov/5262800"},"language":"en","primary_location":{"id":"doi:10.1177/00220345700490010401","doi":"https://doi.org/10.1177/00220345700490010401","is_oa":false,"landing_page_url":"https://doi.org/10.1177/00220345700490010401","pdf_url":null,"source":{"id":"https://openalex.org/S62865007","display_name":"Journal of Dental Research","issn_l":"0022-0345","issn":["0022-0345","1544-0591"],"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-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320017","host_organization_name":"SAGE Publishing","host_organization_lineage":["https://openalex.org/P4310320017"],"host_organization_lineage_names":["SAGE Publishing"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Dental Research","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref","pubmed"],"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/A5103404831","display_name":"Salil K. Das","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I63966007","display_name":"Massachusetts Institute of Technology","ror":"https://ror.org/042nb2s44","country_code":"US","type":"education","lineage":["https://openalex.org/I63966007"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Salil K. Das","raw_affiliation_strings":["Department of Nutrition and Food Science, Massachusetts Institute of Technology, Cam-bridge, Massachusetts 02139"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Nutrition and Food Science, Massachusetts Institute of Technology, Cam-bridge, Massachusetts 02139","institution_ids":["https://openalex.org/I63966007"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5074817739","display_name":"Robert S. Harris","orcid":"https://orcid.org/0000-0001-5464-6892","observed_orcids":["https://orcid.org/0000-0001-5464-6892"]},"institutions":[{"id":"https://openalex.org/I63966007","display_name":"Massachusetts Institute of Technology","ror":"https://ror.org/042nb2s44","country_code":"US","type":"education","lineage":["https://openalex.org/I63966007"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Robert S. Harris","raw_affiliation_strings":["Department of Nutrition and Food Science, Massachusetts Institute of Technology, Cam-bridge, Massachusetts 02139"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Nutrition and Food Science, Massachusetts Institute of Technology, Cam-bridge, Massachusetts 02139","institution_ids":["https://openalex.org/I63966007"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I63966007"],"apc_list":{"value":4400,"currency":"USD","value_usd":4400},"apc_paid":null,"fwci":1.9432,"has_fulltext":false,"cited_by_count":19,"citation_normalized_percentile":{"value":0.84122563,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"49","issue":"1","first_page":"126","last_page":"130"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10955","display_name":"Paleontology and Evolutionary Biology","score":0.29980000853538513,"subfield":{"id":"https://openalex.org/subfields/1911","display_name":"Paleontology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10955","display_name":"Paleontology and Evolutionary Biology","score":0.29980000853538513,"subfield":{"id":"https://openalex.org/subfields/1911","display_name":"Paleontology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11354","display_name":"Evolution and Paleontology Studies","score":0.0729999989271164,"subfield":{"id":"https://openalex.org/subfields/1911","display_name":"Paleontology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10087","display_name":"Archaeology and ancient environmental studies","score":0.06469999998807907,"subfield":{"id":"https://openalex.org/subfields/1911","display_name":"Paleontology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/fossil-teeth","display_name":"fossil teeth","score":0.9710000157356262},{"id":"https://openalex.org/keywords/fatty-acids","display_name":"fatty acids","score":0.9710000157356262},{"id":"https://openalex.org/keywords/unsaturated-fatty-acids","display_name":"unsaturated fatty acids","score":0.9610000252723694},{"id":"https://openalex.org/keywords/oleic-acid","display_name":"oleic acid","score":0.9800000190734863},{"id":"https://openalex.org/keywords/linoleic-acid","display_name":"linoleic acid","score":0.9990000128746033},{"id":"https://openalex.org/keywords/lipid-retention","display_name":"lipid retention","score":0.7170000076293945},{"id":"https://openalex.org/keywords/ancient-teeth","display_name":"ancient teeth","score":0.48399999737739563}],"concepts":[{"id":"https://openalex.org/C2781403372","wikidata":"https://www.wikidata.org/wiki/Q207688","display_name":"Oleic acid","level":2,"score":0.6142852902412415},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.5696848034858704},{"id":"https://openalex.org/C2780809830","wikidata":"https://www.wikidata.org/wiki/Q407426","display_name":"Linoleic acid","level":3,"score":0.5485221147537231},{"id":"https://openalex.org/C123460561","wikidata":"https://www.wikidata.org/wiki/Q677065","display_name":"Gas chromatography","level":2,"score":0.5244688987731934},{"id":"https://openalex.org/C543025807","wikidata":"https://www.wikidata.org/wiki/Q61476","display_name":"Fatty acid","level":2,"score":0.5214061737060547},{"id":"https://openalex.org/C31903555","wikidata":"https://www.wikidata.org/wiki/Q1637030","display_name":"Food science","level":1,"score":0.48157191276550293},{"id":"https://openalex.org/C55493867","wikidata":"https://www.wikidata.org/wiki/Q7094","display_name":"Biochemistry","level":1,"score":0.39683422446250916},{"id":"https://openalex.org/C43617362","wikidata":"https://www.wikidata.org/wiki/Q170050","display_name":"Chromatography","level":1,"score":0.3302155137062073},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.32092106342315674}],"mesh":[{"descriptor_ui":"D000818","descriptor_name":"Animals","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005227","descriptor_name":"Fatty Acids","qualifier_ui":"Q000032","qualifier_name":"analysis","is_major_topic":true},{"descriptor_ui":"D008041","descriptor_name":"Linoleic Acids","qualifier_ui":"Q000032","qualifier_name":"analysis","is_major_topic":false},{"descriptor_ui":"D008055","descriptor_name":"Lipids","qualifier_ui":"Q000032","qualifier_name":"analysis","is_major_topic":true},{"descriptor_ui":"D009829","descriptor_name":"Oleic Acids","qualifier_ui":"Q000032","qualifier_name":"analysis","is_major_topic":false},{"descriptor_ui":"D010161","descriptor_name":"Paleodontology","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D010169","descriptor_name":"Palmitic Acids","qualifier_ui":"Q000032","qualifier_name":"analysis","is_major_topic":false},{"descriptor_ui":"D013229","descriptor_name":"Stearic Acids","qualifier_ui":"Q000032","qualifier_name":"analysis","is_major_topic":false},{"descriptor_ui":"D014070","descriptor_name":"Tooth","qualifier_ui":"Q000032","qualifier_name":"analysis","is_major_topic":true}],"locations_count":2,"locations":[{"id":"doi:10.1177/00220345700490010401","doi":"https://doi.org/10.1177/00220345700490010401","is_oa":false,"landing_page_url":"https://doi.org/10.1177/00220345700490010401","pdf_url":null,"source":{"id":"https://openalex.org/S62865007","display_name":"Journal of Dental Research","issn_l":"0022-0345","issn":["0022-0345","1544-0591"],"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-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320017","host_organization_name":"SAGE Publishing","host_organization_lineage":["https://openalex.org/P4310320017"],"host_organization_lineage_names":["SAGE Publishing"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Dental Research","raw_type":"journal-article"},{"id":"pmid:5262800","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/5262800","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of dental research","raw_type":"Journal Article"}],"best_oa_location":null,"sustainable_development_goals":[],"sustainable_development_goals_aurora":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":12,"referenced_works":["https://openalex.org/W1969173575","https://openalex.org/W1973389922","https://openalex.org/W1984728838","https://openalex.org/W1987902042","https://openalex.org/W1990306336","https://openalex.org/W1998015080","https://openalex.org/W1998060036","https://openalex.org/W2008353784","https://openalex.org/W2045637895","https://openalex.org/W2069435728","https://openalex.org/W2076077188","https://openalex.org/W2494421139"],"related_works":["https://openalex.org/W2069435728","https://openalex.org/W1993773785","https://openalex.org/W2057983071","https://openalex.org/W2063347747","https://openalex.org/W2060319319","https://openalex.org/W2079532899","https://openalex.org/W2315431761","https://openalex.org/W2109690617","https://openalex.org/W2054573068","https://openalex.org/W7207327725"],"abstract_inverted_index":{"Lipids":[0],"and":[1,25,55,68],"fatty":[2,30,56,64],"acids":[3,31,65],"were":[4,13,36,44],"extracted":[5],"from":[6],"eight":[7],"specimens":[8],"of":[9,28,77],"fossil":[10],"teeth":[11,43,52,74],"that":[12,62],"reliably":[14],"estimated":[15,37],"to":[16,19,46,49],"be":[17,47],"100,000":[18],"230,000,000":[20],"years":[21],"old.":[22],"The":[23],"kinds":[24],"relative":[26],"amounts":[27],"individual":[29],"present":[32],"in":[33,53,73],"the":[34],"extract":[35],"by":[38],"gas-liquid":[39],"chromatography.":[40],"These":[41],"ancient":[42],"found":[45],"similar":[48],"modern":[50],"animal":[51],"lipid":[54],"acid":[57],"content.":[58],"It":[59],"is":[60],"noteworthy":[61],"unsaturated":[63],"(ie,":[66],"oleic":[67],"linoleic":[69],"acids)":[70],"survived":[71],"storage":[72],"for":[75],"millions":[76],"years.":[78]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2023,"cited_by_count":2},{"year":2018,"cited_by_count":2},{"year":2015,"cited_by_count":1},{"year":2014,"cited_by_count":2}],"updated_date":"2026-10-31T12:09:11.096373","created_date":"2016-06-24T00:00:00"}
