{"id":"https://openalex.org/W1785648421","doi":"https://doi.org/10.1042/bj0740044","title":"Condensed tannins. 3. Isolation and estimation of (\u2212)-7:3\u2032:4\u2032:5\u2032-tetrahydroxyflavan-3-ol, (+)-catechin and (+)-gallocatechin from black-wattle-bark extract","display_name":"Condensed tannins. 3. Isolation and estimation of (\u2212)-7:3\u2032:4\u2032:5\u2032-tetrahydroxyflavan-3-ol, (+)-catechin and (+)-gallocatechin from black-wattle-bark extract","publication_year":1960,"publication_date":"1960-01-01","ids":{"openalex":"https://openalex.org/W1785648421","doi":"https://doi.org/10.1042/bj0740044","mag":"1785648421","pmid":"https://pubmed.ncbi.nlm.nih.gov/16748810"},"language":"en","primary_location":{"id":"doi:10.1042/bj0740044","doi":"https://doi.org/10.1042/bj0740044","is_oa":true,"landing_page_url":"https://doi.org/10.1042/bj0740044","pdf_url":"https://portlandpress.com/biochemj/article-pdf/74/1/44/696610/bj0740044.pdf","source":{"id":"https://openalex.org/S4210234214","display_name":"Biochemical Journal","issn_l":"0306-3283","issn":["0306-3283"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310311608","host_organization_name":"Portland Press","host_organization_lineage":["https://openalex.org/P4310311608","https://openalex.org/P4310311715"],"host_organization_lineage_names":["Portland Press","Biochemical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Biochemical Journal","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref","pubmed"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://portlandpress.com/biochemj/article-pdf/74/1/44/696610/bj0740044.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5060734715","display_name":"D. G. Roux","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I203238179","display_name":"Rhodes University","ror":"https://ror.org/016sewp10","country_code":"ZA","type":"education","lineage":["https://openalex.org/I203238179"]}],"countries":["ZA"],"is_corresponding":false,"raw_author_name":"D. G. Roux","raw_affiliation_strings":["Leather Industries Research Institute, Rhodes University, Grahamstown, South Africa","Leather Industries Research Institute Rhodes University, Grahamstown, South Africa"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Leather Industries Research Institute, Rhodes University, Grahamstown, South Africa","institution_ids":["https://openalex.org/I203238179"]},{"raw_affiliation_string":"Leather Industries Research Institute Rhodes University, Grahamstown, South Africa","institution_ids":["https://openalex.org/I203238179"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5064252324","display_name":"E. A. Maihs","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I203238179","display_name":"Rhodes University","ror":"https://ror.org/016sewp10","country_code":"ZA","type":"education","lineage":["https://openalex.org/I203238179"]}],"countries":["ZA"],"is_corresponding":false,"raw_author_name":"E. A. Maihs","raw_affiliation_strings":["Leather Industries Research Institute, Rhodes University, Grahamstown, South Africa","Leather Industries Research Institute Rhodes University, Grahamstown, South Africa"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Leather Industries Research Institute, Rhodes University, Grahamstown, South Africa","institution_ids":["https://openalex.org/I203238179"]},{"raw_affiliation_string":"Leather Industries Research Institute Rhodes University, Grahamstown, South Africa","institution_ids":["https://openalex.org/I203238179"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I203238179"],"apc_list":null,"apc_paid":null,"fwci":30.5102,"has_fulltext":true,"cited_by_count":69,"citation_normalized_percentile":{"value":1.0,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":97},"biblio":{"volume":"74","issue":"1","first_page":"44","last_page":"49"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T13817","display_name":"Tannin, Tannase and Anticancer Activities","score":0.5224999785423279,"subfield":{"id":"https://openalex.org/subfields/2402","display_name":"Applied Microbiology and Biotechnology"},"field":{"id":"https://openalex.org/fields/24","display_name":"Immunology and Microbiology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},"topics":[{"id":"https://openalex.org/T13817","display_name":"Tannin, Tannase and Anticancer Activities","score":0.5224999785423279,"subfield":{"id":"https://openalex.org/subfields/2402","display_name":"Applied Microbiology and Biotechnology"},"field":{"id":"https://openalex.org/fields/24","display_name":"Immunology and Microbiology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11208","display_name":"Lignin and Wood Chemistry","score":0.2590000033378601,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10035","display_name":"Phytochemicals and Antioxidant Activities","score":0.050700001418590546,"subfield":{"id":"https://openalex.org/subfields/2704","display_name":"Biochemistry"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/proanthocyanidins","display_name":"proanthocyanidins","score":0.9890000224113464},{"id":"https://openalex.org/keywords/catechins","display_name":"catechins","score":0.9779999852180481},{"id":"https://openalex.org/keywords/gallocatechin","display_name":"gallocatechin","score":0.8040000200271606},{"id":"https://openalex.org/keywords/acacia-mearnsii","display_name":"Acacia mearnsii","score":0.8740000128746033},{"id":"https://openalex.org/keywords/polyphenols","display_name":"polyphenols","score":0.7009999752044678},{"id":"https://openalex.org/keywords/tannin-analysis","display_name":"tannin analysis","score":0.5389999747276306},{"id":"https://openalex.org/keywords/heartwood-extractives","display_name":"heartwood extractives","score":0.6909999847412109}],"concepts":[{"id":"https://openalex.org/C2780439084","wikidata":"https://www.wikidata.org/wiki/Q7974974","display_name":"Wattle (construction)","level":2,"score":0.8846807479858398},{"id":"https://openalex.org/C2778447006","wikidata":"https://www.wikidata.org/wiki/Q1156474","display_name":"Icon","level":2,"score":0.5846225023269653},{"id":"https://openalex.org/C133446333","wikidata":"https://www.wikidata.org/wiki/Q38681","display_name":"Bark (sound)","level":2,"score":0.4976678192615509},{"id":"https://openalex.org/C2778805511","wikidata":"https://www.wikidata.org/wiki/Q1713","display_name":"Citation","level":2,"score":0.48952969908714294},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.42725062370300293},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.3680485188961029},{"id":"https://openalex.org/C142362112","wikidata":"https://www.wikidata.org/wiki/Q735","display_name":"Art","level":0,"score":0.3589308559894562},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.3340240716934204},{"id":"https://openalex.org/C161191863","wikidata":"https://www.wikidata.org/wiki/Q199655","display_name":"Library science","level":1,"score":0.3286813497543335},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.26734596490859985},{"id":"https://openalex.org/C166957645","wikidata":"https://www.wikidata.org/wiki/Q23498","display_name":"Archaeology","level":1,"score":0.18390974402427673},{"id":"https://openalex.org/C97137747","wikidata":"https://www.wikidata.org/wiki/Q38112","display_name":"Forestry","level":1,"score":0.09928610920906067},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1042/bj0740044","doi":"https://doi.org/10.1042/bj0740044","is_oa":true,"landing_page_url":"https://doi.org/10.1042/bj0740044","pdf_url":"https://portlandpress.com/biochemj/article-pdf/74/1/44/696610/bj0740044.pdf","source":{"id":"https://openalex.org/S4210234214","display_name":"Biochemical Journal","issn_l":"0306-3283","issn":["0306-3283"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310311608","host_organization_name":"Portland Press","host_organization_lineage":["https://openalex.org/P4310311608","https://openalex.org/P4310311715"],"host_organization_lineage_names":["Portland Press","Biochemical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Biochemical Journal","raw_type":"journal-article"},{"id":"pmid:16748810","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/16748810","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":"The Biochemical journal","raw_type":"Journal Article"},{"id":"pmh:oai:pubmedcentral.nih.gov:1204046","doi":null,"is_oa":true,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/1204046","pdf_url":null,"source":{"id":"https://openalex.org/S2764455111","display_name":"PubMed Central","issn_l":null,"issn":null,"is_oa":true,"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":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Biochem J","raw_type":"Text"}],"best_oa_location":{"id":"doi:10.1042/bj0740044","doi":"https://doi.org/10.1042/bj0740044","is_oa":true,"landing_page_url":"https://doi.org/10.1042/bj0740044","pdf_url":"https://portlandpress.com/biochemj/article-pdf/74/1/44/696610/bj0740044.pdf","source":{"id":"https://openalex.org/S4210234214","display_name":"Biochemical Journal","issn_l":"0306-3283","issn":["0306-3283"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310311608","host_organization_name":"Portland Press","host_organization_lineage":["https://openalex.org/P4310311608","https://openalex.org/P4310311715"],"host_organization_lineage_names":["Portland Press","Biochemical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Biochemical Journal","raw_type":"journal-article"},"sustainable_development_goals":[],"sustainable_development_goals_aurora":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W1785648421.pdf","grobid_xml":"https://content.openalex.org/works/W1785648421.grobid-xml"},"referenced_works_count":8,"referenced_works":["https://openalex.org/W95048703","https://openalex.org/W1416520309","https://openalex.org/W1667461929","https://openalex.org/W1946798560","https://openalex.org/W1991842729","https://openalex.org/W2344712133","https://openalex.org/W2412358012","https://openalex.org/W4301473643"],"related_works":["https://openalex.org/W3175319091","https://openalex.org/W4231324628","https://openalex.org/W2148538883","https://openalex.org/W2056060060","https://openalex.org/W1504514227","https://openalex.org/W220677501","https://openalex.org/W2076882245","https://openalex.org/W2175435306","https://openalex.org/W2073368243","https://openalex.org/W1490108286"],"abstract_inverted_index":{"The":[0],"bark":[1,113],"and":[2,50,65,87,122,133,164,174,179],"heartwood":[3,90],"extractives":[4],"of":[5,15,21,53,55,59,83,115,129,135,159,170],"the":[6,26,48,56,60,108,111,130,150,166,199,213],"blackwattle":[7],"tree":[8],"(Acacia":[9],"Moll88ima)":[10],"both":[11,160],"contain":[12,40],"mix-":[13],"tures":[14],"complex":[16],"polyphenolic":[17],"compounds":[18,161],"con-":[19],"sisting":[20],"a":[22,41,78],"molecular-weight":[23],"gradation":[24],"within":[25],"range":[27],"300-3000":[28],"(Roux":[29],"&":[30,73,95,99,102],"Evelyn,":[31,100],"1958a,":[32],"c).Keppler":[33],"(1957)":[34],"showed":[35],"that":[36],"wattle-heartwood":[37],"ex-":[38],"tractives":[39],"(+":[42,120,123],")-7:3':4'-trihydroxyflavan-3:4-diol,":[43],"which":[44,66],"appears":[45],"to":[46,69,119],"be":[47,70],"prototype":[49,82],"possible":[51],"precursor":[52],"some":[54],"condensed":[57],"tannins":[58,205],"wood":[61],"(Roux,":[62,92,206],"1958":[63],"b),":[64,209],"was":[67],"found":[68],"enantiomorphous":[71],"(Clark-Lewis":[72],"Roux,":[74],"1958,":[75],"1959)":[76],"with":[77],"similar":[79],"monomeric":[80],"(-)-leuco-fisetinidin":[81],"quebracho":[84],"(Schinop8i8":[85],"balan8ae":[86],"S.":[88],"quebracho-colorado)":[89],"tnins":[91],"1958a;":[93],"Freudenberg":[94],"Weinges,":[96],"1958;":[97],"Roux":[98],"1958b).Roux":[101],"Maihs":[103],"(1958)":[104],"have":[105],"briefly":[106],"reported":[107],"isolation":[109],"from":[110],"fresh":[112],"extract":[114],"(-)-7:3':4':5'-tetrahydroxyflavan-3-ol,":[116],"in":[117,162],"addition":[118],")-catechin":[121],")-gallocatechin.The":[124],"present":[125],"study":[126],"provides":[127],"details":[128],"isolation,":[131],"characterization":[132],"estimation":[134],"these":[136],"catechins.":[137],"EXPERIMENTAL":[138],"AND":[139],"RESULTSAll":[140],"melting":[141,145],"points":[142,146],"are":[143,176,197],"uncorrected.Mixed":[144],"were":[147,183],"made":[148,184],"on":[149],"crystalline":[151],"residue":[152],"remaining":[153],"after":[154],"dis-":[155],"solving":[156],"equal":[157],"weights":[158],"methanol":[163,167],"removing":[165],"under":[168],"vacuum.Analyses":[169],"C,":[171],"H,":[172],"methoxyl":[173],"acetyl":[175],"by":[177,185,198],"Weiler":[178],"Strauss,":[180],"Oxford.Infrared":[181],"comparisons":[182],"Dr":[186],"J.":[187],"R.":[188],"Nunn,":[189],"National":[190],"Chemical":[191],"Research":[192],"Laboratory,":[193],"C.S.I.R.,":[194],"Pretoria.Tannin":[195],"analyses":[196],"ultraviolet":[200],"photometric":[201],"method":[202],"for":[203],"black-wattle":[204],"1951,":[207],"1957a,":[208],"standard-":[210],"ized":[211],"against":[212],"hide-powder":[214],"(shake)":[215],"method.":[216]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2019,"cited_by_count":2},{"year":2018,"cited_by_count":3},{"year":2015,"cited_by_count":2},{"year":2013,"cited_by_count":1},{"year":2012,"cited_by_count":1}],"updated_date":"2026-09-06T09:10:53.072986","created_date":"2025-10-10T00:00:00"}