{"id":"https://openalex.org/A5031455005","orcid":null,"observed_orcids":[],"display_name":"Hans\u2010Joachim Siemann","raw_author_names":["H J Siemann","H. J. SIEMANN","H. J. Siemann","H.-J. siemann","H.\u2010J. SIEMANN","H.\u2010J. Siemann","HANS\u2010JOACHIM SIEMANN","Hans Joachim Siemann","Hans-J. Siemann","Hans\u2010Joachim Siemann"],"full_name":"Hans\u2010Joachim Siemann","works_count":21,"cited_by_count":42,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":3,"i10_index":1},"ids":{"openalex":"https://openalex.org/A5031455005","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I78650965","ror":"https://ror.org/042aqky30","display_name":"Technische Universit\u00e4t Dresden","country_code":"DE","type":"education","lineage":["https://openalex.org/I78650965"]},"years":[1965]}],"last_known_institutions":null,"topics":[{"id":"https://openalex.org/T13736","display_name":"Steroid Chemistry and Biochemistry","count":20,"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/T10756","display_name":"Estrogen and related hormone effects","count":12,"subfield":{"id":"https://openalex.org/subfields/1310","display_name":"Endocrinology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T13859","display_name":"Organic Chemistry Synthesis Methods","count":7,"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/T12215","display_name":"Phytochemical Studies and Bioactivities","count":5,"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/T11385","display_name":"Natural product bioactivities and synthesis","count":2,"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"}}],"topic_share":[{"id":"https://openalex.org/T13736","display_name":"Steroid Chemistry and Biochemistry","value":0.0001506,"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/T13185","display_name":"Phytochemistry and Bioactive Compounds","value":5.92e-05,"subfield":{"id":"https://openalex.org/subfields/2502","display_name":"Biomaterials"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12215","display_name":"Phytochemical Studies and Bioactivities","value":3.76e-05,"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/T10756","display_name":"Estrogen and related hormone effects","value":3.31e-05,"subfield":{"id":"https://openalex.org/subfields/1310","display_name":"Endocrinology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11385","display_name":"Natural product bioactivities and synthesis","value":2.04e-05,"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"}}],"x_concepts":[{"id":"185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","score":0.9400392174720764},{"id":"155647269","wikidata":"https://www.wikidata.org/wiki/Q243455","display_name":"Medicinal chemistry","score":0.612358808517456},{"id":"71240020","wikidata":"https://www.wikidata.org/wiki/Q186011","display_name":"Stereochemistry","score":0.48226577043533325},{"id":"138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","score":0.4686535894870758},{"id":"178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","score":0.23764505982398987}],"counts_by_year":[{"year":1964,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1965,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1969,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1970,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1971,"works_count":6,"oa_works_count":0,"cited_by_count":0},{"year":1978,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1979,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1980,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1986,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1995,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":1}],"display_name_alternatives":["H J Siemann","H. J. SIEMANN","H. J. Siemann","H.-J. siemann","H.\u2010J. SIEMANN","H.\u2010J. Siemann","HANS\u2010JOACHIM SIEMANN","Hans Joachim Siemann","Hans-J. Siemann","Hans\u2010Joachim Siemann"],"block_key":"h siemann","works_api_url":"https://api.openalex.org/works?filter=author.id:A5031455005","updated_date":"2026-11-04T11:47:51","created_date":"2016-06-24T00:00:00"}
