{"id":"https://openalex.org/W2012724341","doi":"https://doi.org/10.1002/(sici)1099-1565(199609)7:5<237::aid-pca310>3.0.co;2-m","title":"Mass Spectrometry of Labelled Triterpenoids: Thermospray and Electron Impact Ionization Analysis","display_name":"Mass Spectrometry of Labelled Triterpenoids: Thermospray and Electron Impact Ionization Analysis","publication_year":1996,"publication_date":"1996-09-01","ids":{"openalex":"https://openalex.org/W2012724341","doi":"https://doi.org/10.1002/(sici)1099-1565(199609)7:5<237::aid-pca310>3.0.co;2-m","mag":"2012724341"},"language":"en","primary_location":{"id":"doi:10.1002/(sici)1099-1565(199609)7:5<237::aid-pca310>3.0.co;2-m","doi":"https://doi.org/10.1002/(sici)1099-1565(199609)7:5<237::aid-pca310>3.0.co;2-m","is_oa":false,"landing_page_url":"https://doi.org/10.1002/(sici)1099-1565(199609)7:5<237::aid-pca310>3.0.co;2-m","pdf_url":null,"source":{"id":"https://openalex.org/S123408762","display_name":"Phytochemical Analysis","issn_l":"0958-0344","issn":["0958-0344","1099-1565"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-1","ki-jl-1","medline","norway-1","poland-70","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Phytochemical Analysis","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"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/A5046957967","display_name":"Hor\u00e1cio Heinzen","orcid":"https://orcid.org/0000-0001-8985-478X","observed_orcids":["https://orcid.org/0000-0001-8985-478X"]},"institutions":[{"id":"https://openalex.org/I74656192","display_name":"University of G\u00f6ttingen","ror":"https://ror.org/01y9bpm73","country_code":"DE","type":"education","lineage":["https://openalex.org/I74656192"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Horacio Heinzen","raw_affiliation_strings":["Institut fu\u0308r Organische Chemie der Universita\u0308t, Tammanstrasse, D-37077 Go\u0308ttingen, Germany","Institut f\u00fcr Organische Chemie der Universit\u00e4t, Tammanstrasse, D\u201037077 G\u00f6ttingen, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institut fu\u0308r Organische Chemie der Universita\u0308t, Tammanstrasse, D-37077 Go\u0308ttingen, Germany","institution_ids":["https://openalex.org/I74656192"]},{"raw_affiliation_string":"Institut f\u00fcr Organische Chemie der Universit\u00e4t, Tammanstrasse, D\u201037077 G\u00f6ttingen, Germany","institution_ids":["https://openalex.org/I74656192"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5108494471","display_name":"J. X. de Vries","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I223822909","display_name":"Heidelberg University","ror":"https://ror.org/038t36y30","country_code":"DE","type":"education","lineage":["https://openalex.org/I223822909"]},{"id":"https://openalex.org/I2802164966","display_name":"University Hospital Heidelberg","ror":"https://ror.org/013czdx64","country_code":"DE","type":"healthcare","lineage":["https://openalex.org/I2802164966"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Jan X. de Vries","raw_affiliation_strings":["Medizinische Klinik der Universita\u0308t, Abteilung Klinische Pharmakologie, Bergheimerstrasse 58, D-69115 Heidelberg, Germany","Medizinische Klinik der Universit\u00e4t, Abteilung Klinische Pharmakologie, Bergheimerstrasse 58, D\u201069115 Heidelberg, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Medizinische Klinik der Universita\u0308t, Abteilung Klinische Pharmakologie, Bergheimerstrasse 58, D-69115 Heidelberg, Germany","institution_ids":["https://openalex.org/I223822909","https://openalex.org/I2802164966"]},{"raw_affiliation_string":"Medizinische Klinik der Universit\u00e4t, Abteilung Klinische Pharmakologie, Bergheimerstrasse 58, D\u201069115 Heidelberg, Germany","institution_ids":["https://openalex.org/I223822909","https://openalex.org/I2802164966"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5048281875","display_name":"Patrick Moyna","orcid":"https://orcid.org/0000-0002-7461-8511","observed_orcids":["https://orcid.org/0000-0002-7461-8511"]},"institutions":[{"id":"https://openalex.org/I180910786","display_name":"Universidad de la Rep\u00fablica de Uruguay","ror":"https://ror.org/030bbe882","country_code":"UY","type":"education","lineage":["https://openalex.org/I180910786"]}],"countries":["UY"],"is_corresponding":false,"raw_author_name":"Patrick Moyna","raw_affiliation_strings":["Ca\u0301tedra de Farmacognosia y Productos Naturales, Facultad de Qui\u0301mica, Universidad de la Repu\u0301blica, Avenida General Flores 2124, Montevideo, Uraguay","C\u00e1tedra de Farmacognosia y Productos Naturales, Facultad de Qu\u00edmica, Universidad de la Rep\u00fablica, Avenida General Flores 2124, Montevideo, Uraguay"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Ca\u0301tedra de Farmacognosia y Productos Naturales, Facultad de Qui\u0301mica, Universidad de la Repu\u0301blica, Avenida General Flores 2124, Montevideo, Uraguay","institution_ids":["https://openalex.org/I180910786"]},{"raw_affiliation_string":"C\u00e1tedra de Farmacognosia y Productos Naturales, Facultad de Qu\u00edmica, Universidad de la Rep\u00fablica, Avenida General Flores 2124, Montevideo, Uraguay","institution_ids":["https://openalex.org/I180910786"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5110093818","display_name":"Gerd Remberg","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I74656192","display_name":"University of G\u00f6ttingen","ror":"https://ror.org/01y9bpm73","country_code":"DE","type":"education","lineage":["https://openalex.org/I74656192"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Gerd Remberg","raw_affiliation_strings":["Institut fu\u0308r Organische Chemie der Universita\u0308t, Tammanstrasse, D-37077 Go\u0308ttingen, Germany","Institut f\u00fcr Organische Chemie der Universit\u00e4t, Tammanstrasse, D\u201037077 G\u00f6ttingen, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institut fu\u0308r Organische Chemie der Universita\u0308t, Tammanstrasse, D-37077 Go\u0308ttingen, Germany","institution_ids":["https://openalex.org/I74656192"]},{"raw_affiliation_string":"Institut f\u00fcr Organische Chemie der Universit\u00e4t, Tammanstrasse, D\u201037077 G\u00f6ttingen, Germany","institution_ids":["https://openalex.org/I74656192"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5000035343","display_name":"Ruben Martinez","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I223822909","display_name":"Heidelberg University","ror":"https://ror.org/038t36y30","country_code":"DE","type":"education","lineage":["https://openalex.org/I223822909"]},{"id":"https://openalex.org/I2802164966","display_name":"University Hospital Heidelberg","ror":"https://ror.org/013czdx64","country_code":"DE","type":"healthcare","lineage":["https://openalex.org/I2802164966"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Ruben Martinez","raw_affiliation_strings":["Medizinische Klinik der Universita\u0308t, Abteilung Klinische Pharmakologie, Bergheimerstrasse 58, D-69115 Heidelberg, Germany","Medizinische Klinik der Universit\u00e4t, Abteilung Klinische Pharmakologie, Bergheimerstrasse 58, D\u201069115 Heidelberg, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Medizinische Klinik der Universita\u0308t, Abteilung Klinische Pharmakologie, Bergheimerstrasse 58, D-69115 Heidelberg, Germany","institution_ids":["https://openalex.org/I223822909","https://openalex.org/I2802164966"]},{"raw_affiliation_string":"Medizinische Klinik der Universit\u00e4t, Abteilung Klinische Pharmakologie, Bergheimerstrasse 58, D\u201069115 Heidelberg, Germany","institution_ids":["https://openalex.org/I223822909","https://openalex.org/I2802164966"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5008582298","display_name":"Lutz Friedjan Tietze","orcid":"https://orcid.org/0000-0003-3847-0756","observed_orcids":["https://orcid.org/0000-0003-3847-0756"]},"institutions":[{"id":"https://openalex.org/I74656192","display_name":"University of G\u00f6ttingen","ror":"https://ror.org/01y9bpm73","country_code":"DE","type":"education","lineage":["https://openalex.org/I74656192"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Lutz F. Tietze","raw_affiliation_strings":["Institut fu\u0308r Organische Chemie der Universita\u0308t, Tammanstrasse, D-37077 Go\u0308ttingen, Germany","Institut f\u00fcr Organische Chemie der Universit\u00e4t, Tammanstrasse, D\u201037077 G\u00f6ttingen, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institut fu\u0308r Organische Chemie der Universita\u0308t, Tammanstrasse, D-37077 Go\u0308ttingen, Germany","institution_ids":["https://openalex.org/I74656192"]},{"raw_affiliation_string":"Institut f\u00fcr Organische Chemie der Universit\u00e4t, Tammanstrasse, D\u201037077 G\u00f6ttingen, Germany","institution_ids":["https://openalex.org/I74656192"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5046957967"],"corresponding_institution_ids":["https://openalex.org/I74656192"],"apc_list":{"value":4380,"currency":"USD","value_usd":4380},"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":23,"citation_normalized_percentile":{"value":0.12163265,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":87,"max":96},"biblio":{"volume":"7","issue":"5","first_page":"237","last_page":"244"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10683","display_name":"Mass Spectrometry Techniques and Applications","score":0.6801999807357788,"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/T10683","display_name":"Mass Spectrometry Techniques and Applications","score":0.6801999807357788,"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/T11385","display_name":"Natural product bioactivities and synthesis","score":0.27489998936653137,"subfield":{"id":"https://openalex.org/subfields/1605","display_name":"Organic Chemistry"},"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/T13128","display_name":"Chromatography in Natural Products","score":0.009800000116229057,"subfield":{"id":"https://openalex.org/subfields/1602","display_name":"Analytical Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/triterpenoids","display_name":"triterpenoids","score":0.9850000143051147},{"id":"https://openalex.org/keywords/thermospray-ionization","display_name":"thermospray ionization","score":0.9150000214576721},{"id":"https://openalex.org/keywords/electron-impact-ionization","display_name":"electron impact ionization","score":0.9900000095367432},{"id":"https://openalex.org/keywords/lupane-triterpenoids","display_name":"lupane triterpenoids","score":0.8029999732971191},{"id":"https://openalex.org/keywords/molecular-ions","display_name":"molecular ions","score":0.5960000157356262},{"id":"https://openalex.org/keywords/plant-extracts","display_name":"plant extracts","score":0.6819999814033508},{"id":"https://openalex.org/keywords/trimethylsilyl-derivatives","display_name":"trimethylsilyl derivatives","score":0.7459999918937683},{"id":"https://openalex.org/keywords/acetate-derivatives","display_name":"acetate derivatives","score":0.6340000033378601}],"concepts":[{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.9593794345855713},{"id":"https://openalex.org/C186716092","wikidata":"https://www.wikidata.org/wiki/Q3990339","display_name":"Thermospray","level":5,"score":0.940471887588501},{"id":"https://openalex.org/C205759337","wikidata":"https://www.wikidata.org/wiki/Q1748259","display_name":"Electron ionization","level":4,"score":0.8160068392753601},{"id":"https://openalex.org/C162356407","wikidata":"https://www.wikidata.org/wiki/Q180809","display_name":"Mass spectrometry","level":2,"score":0.7013648152351379},{"id":"https://openalex.org/C43617362","wikidata":"https://www.wikidata.org/wiki/Q170050","display_name":"Chromatography","level":1,"score":0.6945517659187317},{"id":"https://openalex.org/C2779782153","wikidata":"https://www.wikidata.org/wiki/Q409366","display_name":"Lupeol","level":2,"score":0.6795125007629395},{"id":"https://openalex.org/C51884965","wikidata":"https://www.wikidata.org/wiki/Q471254","display_name":"Chemical ionization","level":4,"score":0.6519032716751099},{"id":"https://openalex.org/C40325409","wikidata":"https://www.wikidata.org/wiki/Q2360668","display_name":"Mass spectrum","level":3,"score":0.6463418006896973},{"id":"https://openalex.org/C123460561","wikidata":"https://www.wikidata.org/wiki/Q677065","display_name":"Gas chromatography","level":2,"score":0.5425077676773071},{"id":"https://openalex.org/C2777000832","wikidata":"https://www.wikidata.org/wiki/Q419853","display_name":"Trimethylsilyl","level":2,"score":0.52866530418396},{"id":"https://openalex.org/C44937612","wikidata":"https://www.wikidata.org/wiki/Q212364","display_name":"Terpene","level":2,"score":0.45260611176490784},{"id":"https://openalex.org/C198291218","wikidata":"https://www.wikidata.org/wiki/Q190382","display_name":"Ionization","level":3,"score":0.44010427594184875},{"id":"https://openalex.org/C205345274","wikidata":"https://www.wikidata.org/wiki/Q873009","display_name":"Gas chromatography\u2013mass spectrometry","level":3,"score":0.4391520619392395},{"id":"https://openalex.org/C2780527577","wikidata":"https://www.wikidata.org/wiki/Q2915788","display_name":"Triterpene","level":3,"score":0.42098474502563477},{"id":"https://openalex.org/C191015642","wikidata":"https://www.wikidata.org/wiki/Q1132459","display_name":"Fragmentation (computing)","level":2,"score":0.4104357063770294},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.26474708318710327},{"id":"https://openalex.org/C145148216","wikidata":"https://www.wikidata.org/wiki/Q36496","display_name":"Ion","level":2,"score":0.24159598350524902},{"id":"https://openalex.org/C31827203","wikidata":"https://www.wikidata.org/wiki/Q874296","display_name":"Tandem mass spectrometry","level":3,"score":0.18828243017196655},{"id":"https://openalex.org/C71043704","wikidata":"https://www.wikidata.org/wiki/Q17144692","display_name":"Selected reaction monitoring","level":4,"score":0.10970479249954224},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.0},{"id":"https://openalex.org/C142724271","wikidata":"https://www.wikidata.org/wiki/Q7208","display_name":"Pathology","level":1,"score":0.0},{"id":"https://openalex.org/C204787440","wikidata":"https://www.wikidata.org/wiki/Q188504","display_name":"Alternative medicine","level":2,"score":0.0},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1002/(sici)1099-1565(199609)7:5<237::aid-pca310>3.0.co;2-m","doi":"https://doi.org/10.1002/(sici)1099-1565(199609)7:5<237::aid-pca310>3.0.co;2-m","is_oa":false,"landing_page_url":"https://doi.org/10.1002/(sici)1099-1565(199609)7:5<237::aid-pca310>3.0.co;2-m","pdf_url":null,"source":{"id":"https://openalex.org/S123408762","display_name":"Phytochemical Analysis","issn_l":"0958-0344","issn":["0958-0344","1099-1565"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-1","ki-jl-1","medline","norway-1","poland-70","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Phytochemical Analysis","raw_type":"journal-article"},{"id":"doi:10.1002/(sici)1099-1565(199609)7:5<237::aid-pca310>3.3.co;2-d","doi":"https://doi.org/10.1002/(sici)1099-1565(199609)7:5<237::aid-pca310>3.3.co;2-d","is_oa":false,"landing_page_url":"https://doi.org/10.1002/(sici)1099-1565(199609)7:5<237::aid-pca310>3.3.co;2-d","pdf_url":null,"source":{"id":"https://openalex.org/S123408762","display_name":"Phytochemical Analysis","issn_l":"0958-0344","issn":["0958-0344","1099-1565"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-1","ki-jl-1","medline","norway-1","poland-70","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Phytochemical Analysis","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320334812","display_name":"Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica","ror":"https://ror.org/02ap3w078"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W4399153996","https://openalex.org/W4404638646","https://openalex.org/W2050690226","https://openalex.org/W2746185901","https://openalex.org/W2060735741","https://openalex.org/W2048951233","https://openalex.org/W2239513015","https://openalex.org/W2064903192","https://openalex.org/W2030602174","https://openalex.org/W7153731912"],"abstract_inverted_index":{"The":[0],"mass":[1,24],"spectra":[2,25],"of":[3,31,43,48,62,73,92,96,102,111],"unlabelled":[4],"and":[5,9,18,45,67,75,115],"specifically":[6],"labelled":[7],"triterpenes":[8,110],"derivatives":[10],"were":[11,26,107],"recorded":[12,108],"using":[13,54],"thermospray":[14],"liquid":[15],"chromatography":[16],"(TSP-LC)":[17],"electron":[19],"impact":[20],"(EI)":[21],"ionization.":[22,83],"These":[23],"used":[27],"for":[28,89,109],"the":[29,35,38,46,63,90,93,103,112],"development":[30],"assays":[32],"to":[33],"characterize":[34],"products":[36],"from":[37,132],"in":[39,50,129],"vitro":[40],"oxidative":[41],"biodegradation":[42],"triterpenoids":[44],"identification":[47],"compounds":[49],"plant":[51,130],"extracts.":[52],"Analysis":[53],"gas":[55],"chromatography\u2014mass":[56],"spectrometry":[57],"(GC\u2014MS)":[58],"with":[59,79,81],"EI":[60,104],"ionization":[61,85],"free":[64],"products,":[65],"acetates":[66],"trimethylsilyl":[68],"derivatives,":[69],"showed":[70],"lower":[71],"limits":[72],"detection":[74],"higher":[76],"selectivity":[77],"compared":[78],"those":[80],"TSP-LC":[82,84],"may":[86],"be":[87],"useful":[88],"determination":[91],"molecular":[94],"ions":[95,106],"highly":[97],"oxygenated":[98],"tritepenoids.":[99],"Accurate":[100],"masses":[101],"fragment":[105],"lupane":[113],"series":[114],"fragmentation":[116],"routes":[117],"are":[118],"discussed.":[119],"Based":[120],"on":[121],"these":[122],"characteristic":[123],"fragmentations,":[124],"O-methyl-\u03b2-lupeol":[125],"has":[126],"been":[127],"identified":[128],"extracts":[131],"Orbygnia":[133],"species.":[134]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":2},{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":2},{"year":2014,"cited_by_count":1},{"year":2012,"cited_by_count":1}],"updated_date":"2026-10-19T09:35:57.686232","created_date":"2016-06-24T00:00:00"}
