{"id":"https://openalex.org/A5010762003","orcid":"https://orcid.org/0000-0003-2814-7365","observed_orcids":["https://orcid.org/0000-0003-2814-7365"],"display_name":"Alwi Gery Agustan Siregar","raw_author_names":["A E Siregar","A G A Siregar","A G Siregar","A. G. Siregar","A.G. Siregar","A.G.A. Siregar","Alwi Gery Agustan Siregar","Alwi Gery Siregar","Alwi Siregar","Siregar, Alwi Gery Agustan"],"full_name":"Alwi  gery agustan Siregar","works_count":34,"cited_by_count":99,"summary_stats":{"2yr_mean_citedness":1.1875,"h_index":5,"i10_index":3},"ids":{"openalex":"https://openalex.org/A5010762003","orcid":"https://orcid.org/0000-0003-2814-7365","observed_orcids":["https://orcid.org/0000-0003-2814-7365"]},"affiliations":[{"institution":{"id":"https://openalex.org/I254887060","ror":"https://ror.org/01kknrc90","display_name":"Universitas Sumatera Utara","country_code":"ID","type":"education","lineage":["https://openalex.org/I254887060"]},"years":[2025,2024,2023,2022,2021,2020,2019]},{"institution":{"id":"https://openalex.org/I4405263210","ror":"https://ror.org/03xnamj44","display_name":"Politeknik Negeri Media Kreatif","country_code":"ID","type":"education","lineage":["https://openalex.org/I4405263210"]},"years":[2026,2025]}],"last_known_institutions":[{"id":"https://openalex.org/I4405263210","ror":"https://ror.org/03xnamj44","display_name":"Politeknik Negeri Media Kreatif","country_code":"ID","type":"education","lineage":["https://openalex.org/I4405263210"]}],"topics":[{"id":"https://openalex.org/T10507","display_name":"Biodiesel Production and Applications","count":20,"subfield":{"id":"https://openalex.org/subfields/2103","display_name":"Fuel Technology"},"field":{"id":"https://openalex.org/fields/21","display_name":"Energy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11351","display_name":"Catalysis and Hydrodesulfurization Studies","count":13,"subfield":{"id":"https://openalex.org/subfields/1503","display_name":"Catalysis"},"field":{"id":"https://openalex.org/fields/15","display_name":"Chemical Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10088","display_name":"Thermochemical Biomass Conversion Processes","count":12,"subfield":{"id":"https://openalex.org/subfields/2103","display_name":"Fuel Technology"},"field":{"id":"https://openalex.org/fields/21","display_name":"Energy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10480","display_name":"Ionic liquids properties and applications","count":11,"subfield":{"id":"https://openalex.org/subfields/1606","display_name":"Physical and Theoretical 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/T11009","display_name":"Catalysis for Biomass Conversion","count":5,"subfield":{"id":"https://openalex.org/subfields/1503","display_name":"Catalysis"},"field":{"id":"https://openalex.org/fields/15","display_name":"Chemical Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T10507","display_name":"Biodiesel Production and Applications","value":0.0001333,"subfield":{"id":"https://openalex.org/subfields/2103","display_name":"Fuel Technology"},"field":{"id":"https://openalex.org/fields/21","display_name":"Energy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13817","display_name":"Tannin, Tannase and Anticancer Activities","value":0.0001157,"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/T11351","display_name":"Catalysis and Hydrodesulfurization Studies","value":0.0001055,"subfield":{"id":"https://openalex.org/subfields/1503","display_name":"Catalysis"},"field":{"id":"https://openalex.org/fields/15","display_name":"Chemical Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10480","display_name":"Ionic liquids properties and applications","value":8.8e-05,"subfield":{"id":"https://openalex.org/subfields/1606","display_name":"Physical and Theoretical 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/T11009","display_name":"Catalysis for Biomass Conversion","value":4.02e-05,"subfield":{"id":"https://openalex.org/subfields/1503","display_name":"Catalysis"},"field":{"id":"https://openalex.org/fields/15","display_name":"Chemical Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","score":0.9174373149871826},{"id":"161790260","wikidata":"https://www.wikidata.org/wiki/Q82264","display_name":"Catalysis","score":0.8417900800704956},{"id":"52896960","wikidata":"https://www.wikidata.org/wiki/Q167947","display_name":"Biodiesel","score":0.8257602453231812},{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.5733891725540161},{"id":"178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","score":0.5556014776229858}],"counts_by_year":[{"year":2018,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2019,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":2020,"works_count":8,"oa_works_count":7,"cited_by_count":2},{"year":2021,"works_count":4,"oa_works_count":3,"cited_by_count":6},{"year":2022,"works_count":2,"oa_works_count":1,"cited_by_count":12},{"year":2023,"works_count":1,"oa_works_count":1,"cited_by_count":13},{"year":2024,"works_count":3,"oa_works_count":3,"cited_by_count":20},{"year":2025,"works_count":8,"oa_works_count":6,"cited_by_count":23},{"year":2026,"works_count":5,"oa_works_count":3,"cited_by_count":23}],"display_name_alternatives":["A E Siregar","A G A Siregar","A G Siregar","A. G. Siregar","A.G. Siregar","A.G.A. Siregar","Alwi Gery Agustan Siregar","Alwi Gery Siregar","Alwi Siregar","Siregar, Alwi Gery Agustan"],"block_key":"a siregar","works_api_url":"https://api.openalex.org/works?filter=author.id:A5010762003","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5010762003","updated_date":"2026-11-10T14:30:39","created_date":"2019-07-12T00:00:00"}
