{"doi":"10.1126/science.169.3940.54","title":"Droplet Countercurrent Chromatography","abstract":"<jats:p>A new form of countercurrent chromatography, named droplet countercurrent chromatography, has been developed. This all-liquid separation technique is based on the partitioning of solute between a steady stream of droplets of moving phase and a column of surrounding stationary liquid phase. Milligram quantities of dinitrophenyl (DNP) amino acids were separated with an efficiency comparable to that of gas chromatography.</jats:p>","journal":"Science","year":1970,"id":23612,"datarank":14.75323278281202,"base_score":5.0106352940962555,"endowment":5.0106352940962555,"self_citation_contribution":0.7515952941144385,"citation_network_contribution":14.001637488697583,"self_endowment_contribution":0.7515952941144385,"citer_contribution":14.001637488697583,"corpus_percentile":null,"corpus_rank":null,"citation_count":149,"citer_count":116,"citers_with_citation_signal":107,"citers_with_endowment":107,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":144330,"name":"John J. Pisano","orcid":null,"position":1,"is_corresponding":false},{"id":144331,"name":"Yoichiro Ito","orcid":null,"position":2,"is_corresponding":false},{"id":144332,"name":"Robert L. Bowman","orcid":null,"position":3,"is_corresponding":false},{"id":144329,"name":"Takenori Tanimura","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":5.0106352940962555,"endowment":5.0106352940962555,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"5447530","pmcid":null,"openalex_id":"https://openalex.org/W4233668755","authors":[],"funders":[],"total_grants":0,"fwci":0.7937,"citation_percentile":0.76548673,"influential_citations":2,"citation_trend":[{"year":2012,"count":3},{"year":2013,"count":1},{"year":2014,"count":1},{"year":2015,"count":4},{"year":2016,"count":6},{"year":2017,"count":2},{"year":2019,"count":4},{"year":2020,"count":1},{"year":2022,"count":4},{"year":2023,"count":3},{"year":2024,"count":2},{"year":2025,"count":6},{"year":2026,"count":1}],"oa_status":"closed","license":null,"oa_locations":[{"url":"https://www.science.org/doi/pdf/10.1126/science.169.3940.54","host_type":"publisher"},{"url":"https://doi.org/10.1126/science.169.3940.54","host_type":"journal"},{"url":"https://pubmed.ncbi.nlm.nih.gov/5447530","host_type":"repository"}],"fields_of_study":["Chromatography in Natural Products","Natural product bioactivities and synthesis","Phytochemistry and biological activity of medicinal plants","Medicine","Chemistry","Alanine","Amino Acids","Chromatography","Countercurrent Distribution","Cystine","Dinitrophenols","Fluorocarbon Polymers","Ornithine","Proline","Serine","Threonine"],"mesh_terms":["Alanine","Amino Acids","Chromatography","Countercurrent Distribution","Cystine","Dinitrophenols","Fluorocarbon Polymers","Ornithine","Proline","Serine","Threonine"],"keywords":["Countercurrent chromatography","Countercurrent exchange","Chromatography","Countercurrent distribution","Chemistry","Chromatography column","Column chromatography","Stationary phase","Hydrophilic interaction chromatography","Gas chromatography","Phase (matter)","High-performance liquid chromatography","Organic chemistry","Thermodynamics"],"sdg_mappings":[],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-06-07T19:59:14.201503Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}