{"id":"https://openalex.org/W64481516","doi":null,"title":"Carbon Isotopes, Photosynthesis and Archaeology","display_name":"Carbon Isotopes, Photosynthesis and Archaeology","publication_year":1982,"publication_date":"1982-11-01","ids":{"openalex":"https://openalex.org/W64481516","mag":"64481516"},"language":"en","primary_location":{"id":"mag:64481516","doi":null,"is_oa":false,"landing_page_url":"https://agris.fao.org/agris-search/search.do?recordID=US201302576626","pdf_url":null,"source":{"id":"https://openalex.org/S203291325","display_name":"American Scientist","issn_l":"0003-0996","issn":["0003-0996","1545-2786"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","poland-20","russia-white-list-4"],"host_organization":"https://openalex.org/P4310315943","host_organization_name":"Sigma Xi","host_organization_lineage":["https://openalex.org/P4310315943"],"host_organization_lineage_names":["Sigma Xi"],"type":"journal"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":"American Scientist","raw_type":null},"volume":null,"type":"article","is_traditional":true,"indexed_in":[],"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/A5032815375","display_name":"Nicolaas J. van der Merwe","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Nicolaas J. van der Merwe","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":["https://openalex.org/A5032815375"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":67.8043,"has_fulltext":false,"cited_by_count":432,"citation_normalized_percentile":{"value":0.99807569,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":93,"max":100},"biblio":{"volume":"70","issue":"6","first_page":"596","last_page":"606"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10087","display_name":"Archaeology and ancient environmental studies","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/3302","display_name":"Archeology"},"field":{"id":"https://openalex.org/fields/33","display_name":"Social Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},"topics":[{"id":"https://openalex.org/T10087","display_name":"Archaeology and ancient environmental studies","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/3302","display_name":"Archeology"},"field":{"id":"https://openalex.org/fields/33","display_name":"Social Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T12073","display_name":"Isotope Analysis in Ecology","score":0.00039999998989515007,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10017","display_name":"Geology and Paleoclimatology Research","score":0.0,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"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/carbon-isotopes","display_name":"carbon isotopes","score":0.9980000257492065},{"id":"https://openalex.org/keywords/photosynthesis","display_name":"photosynthesis","score":0.9800000190734863},{"id":"https://openalex.org/keywords/archaeology","display_name":"archaeology","score":0.6769999861717224},{"id":"https://openalex.org/keywords/radiocarbon-dating","display_name":"radiocarbon dating","score":0.7490000128746033},{"id":"https://openalex.org/keywords/stable-isotopes","display_name":"stable isotopes","score":0.6200000047683716},{"id":"https://openalex.org/keywords/paleoclimate","display_name":"paleoclimate","score":0.4650000035762787}],"concepts":[{"id":"https://openalex.org/C183688256","wikidata":"https://www.wikidata.org/wiki/Q11982","display_name":"Photosynthesis","level":2,"score":0.7337244749069214},{"id":"https://openalex.org/C185059815","wikidata":"https://www.wikidata.org/wiki/Q471790","display_name":"Isotopes of carbon","level":3,"score":0.6850830316543579},{"id":"https://openalex.org/C164304813","wikidata":"https://www.wikidata.org/wiki/Q25276","display_name":"Isotope","level":2,"score":0.5264647603034973},{"id":"https://openalex.org/C140205800","wikidata":"https://www.wikidata.org/wiki/Q5860","display_name":"Carbon fibers","level":3,"score":0.49724891781806946},{"id":"https://openalex.org/C166957645","wikidata":"https://www.wikidata.org/wiki/Q23498","display_name":"Archaeology","level":1,"score":0.44778522849082947},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.39254921674728394},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.2918534576892853},{"id":"https://openalex.org/C59822182","wikidata":"https://www.wikidata.org/wiki/Q441","display_name":"Botany","level":1,"score":0.20017719268798828},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.1899060308933258},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.11876413226127625},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.11705130338668823},{"id":"https://openalex.org/C185544564","wikidata":"https://www.wikidata.org/wiki/Q81197","display_name":"Nuclear physics","level":1,"score":0.11141353845596313},{"id":"https://openalex.org/C104779481","wikidata":"https://www.wikidata.org/wiki/Q50707","display_name":"Composite number","level":2,"score":0.0},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"mag:64481516","doi":null,"is_oa":false,"landing_page_url":"https://agris.fao.org/agris-search/search.do?recordID=US201302576626","pdf_url":null,"source":{"id":"https://openalex.org/S203291325","display_name":"American Scientist","issn_l":"0003-0996","issn":["0003-0996","1545-2786"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","poland-20","russia-white-list-4"],"host_organization":"https://openalex.org/P4310315943","host_organization_name":"Sigma Xi","host_organization_lineage":["https://openalex.org/P4310315943"],"host_organization_lineage_names":["Sigma Xi"],"type":"journal"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":"American Scientist","raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W4289255697","https://openalex.org/W1657407210","https://openalex.org/W3090013646","https://openalex.org/W4250081412","https://openalex.org/W2810760071","https://openalex.org/W2017020207","https://openalex.org/W2043067358","https://openalex.org/W1983066512","https://openalex.org/W2011389657","https://openalex.org/W1504129498"],"abstract_inverted_index":null,"counts_by_year":[{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":7},{"year":2022,"cited_by_count":3},{"year":2021,"cited_by_count":17},{"year":2020,"cited_by_count":12},{"year":2019,"cited_by_count":22},{"year":2018,"cited_by_count":25},{"year":2017,"cited_by_count":10},{"year":2016,"cited_by_count":15},{"year":2015,"cited_by_count":8},{"year":2014,"cited_by_count":12},{"year":2013,"cited_by_count":19},{"year":2012,"cited_by_count":13}],"updated_date":"2026-11-04T10:54:05.112534","created_date":"2016-06-24T00:00:00"}
