Georg Opfermann

1.6k total citations
32 papers, 1.3k citations indexed

About

Georg Opfermann is a scholar working on Endocrinology, Diabetes and Metabolism, Animal Science and Zoology and Spectroscopy. According to data from OpenAlex, Georg Opfermann has authored 32 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 25 papers in Endocrinology, Diabetes and Metabolism, 13 papers in Animal Science and Zoology and 11 papers in Spectroscopy. Recurrent topics in Georg Opfermann's work include Hormonal and reproductive studies (25 papers), Pharmacological Effects and Assays (13 papers) and Mass Spectrometry Techniques and Applications (9 papers). Georg Opfermann is often cited by papers focused on Hormonal and reproductive studies (25 papers), Pharmacological Effects and Assays (13 papers) and Mass Spectrometry Techniques and Applications (9 papers). Georg Opfermann collaborates with scholars based in Germany, Australia and United States. Georg Opfermann's co-authors include Wilhelm Schänzer, Mario Thevis, Hans Geyer, W. Schänzer, Ute Mareck, Maria Kristina Parr, M. Donike, Manfred Donike, Thomas Piper and Nils E. Schlörer and has published in prestigious journals such as Endocrinology, Toxicology Letters and The Journal of Steroid Biochemistry and Molecular Biology.

In The Last Decade

Georg Opfermann

32 papers receiving 1.2k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Georg Opfermann Germany 25 916 416 382 306 221 32 1.3k
Sven Guddat Germany 24 840 0.9× 324 0.8× 389 1.0× 395 1.3× 259 1.2× 53 1.4k
Christiane Ayotte Canada 19 782 0.9× 300 0.7× 244 0.6× 331 1.1× 230 1.0× 39 1.3k
W. Schänzer Germany 8 742 0.8× 270 0.6× 227 0.6× 157 0.5× 145 0.7× 10 907
Antti Leinonen Finland 17 600 0.7× 259 0.6× 534 1.4× 142 0.5× 251 1.1× 36 1.2k
Emmie N. M. Ho China 21 551 0.6× 300 0.7× 340 0.9× 230 0.8× 446 2.0× 70 1.4k
Yiannis S. Angelis Greece 17 545 0.6× 180 0.4× 340 0.9× 170 0.6× 209 0.9× 44 989
Г. М. Родченков Russia 20 476 0.5× 173 0.4× 252 0.7× 187 0.6× 221 1.0× 56 1.1k
Oliver Krug Germany 18 442 0.5× 115 0.3× 156 0.4× 274 0.9× 183 0.8× 40 848
Andrew Hutt United Kingdom 3 359 0.4× 135 0.3× 126 0.3× 142 0.5× 101 0.5× 7 567
Henrique Marcelo Gualberto Pereira Brazil 15 250 0.3× 95 0.2× 179 0.5× 146 0.5× 168 0.8× 66 704

Countries citing papers authored by Georg Opfermann

Since Specialization
Citations

This map shows the geographic impact of Georg Opfermann's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Georg Opfermann with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Georg Opfermann more than expected).

Fields of papers citing papers by Georg Opfermann

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Georg Opfermann. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Georg Opfermann. The network helps show where Georg Opfermann may publish in the future.

Co-authorship network of co-authors of Georg Opfermann

This figure shows the co-authorship network connecting the top 25 collaborators of Georg Opfermann. A scholar is included among the top collaborators of Georg Opfermann based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Georg Opfermann. Georg Opfermann is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Parr, Maria Kristina, Andy Zöllner, Gregor Fußhöller, et al.. (2012). Unexpected contribution of cytochrome P450 enzymes CYP11B2 and CYP21, as well as CYP3A4 in xenobiotic androgen elimination – Insights from metandienone metabolism. Toxicology Letters. 213(3). 381–391. 35 indexed citations
2.
Parr, Maria Kristina, Georg Opfermann, Hans Geyer, et al.. (2011). Seized designer supplement named “1-Androsterone”: Identification as 3β-hydroxy-5α-androst-1-en-17-one and its urinary elimination. Steroids. 76(6). 540–547. 30 indexed citations
3.
Piper, Thomas, Georg Opfermann, Mario Thevis, & Wilhelm Schänzer. (2010). Determination of 13 C/ 12 C ratios of endogenous urinary steroids excreted as sulpho conjugates. Rapid Communications in Mass Spectrometry. 24(21). 3171–3181. 49 indexed citations
4.
Piper, Thomas, Georg Opfermann, Ute Mareck, et al.. (2009). Determination of 13C/12C ratios of urinary epitestosterone and its main metabolites 5α‐ and 5β‐androstane‐3α, 17α‐diol. Drug Testing and Analysis. 1(11-12). 576–586. 30 indexed citations
5.
Parr, Maria Kristina, Gregor Fußhöller, Nils E. Schlörer, et al.. (2008). Metabolism of androsta‐1,4,6‐triene‐3,17‐dione and detection by gas chromatography/mass spectrometry in doping control. Rapid Communications in Mass Spectrometry. 23(2). 207–218. 26 indexed citations
6.
Parr, Maria Kristina, Michael Gütschow, Jörg Daniels, et al.. (2008). Identification of steroid isoxazole isomers marketed as designer supplement. Steroids. 74(3). 322–328. 24 indexed citations
7.
Mareck, Ute, Hans Geyer, Georg Opfermann, Mario Thevis, & Wilhelm Schänzer. (2008). Factors influencing the steroid profile in doping control analysis. Journal of Mass Spectrometry. 43(7). 877–891. 219 indexed citations
8.
Kohler, Maxie, Maria Kristina Parr, Georg Opfermann, et al.. (2007). Metabolism of 4-hydroxyandrostenedione and 4-hydroxytestosterone: Mass spectrometric identification of urinary metabolites. Steroids. 72(3). 278–286. 38 indexed citations
9.
10.
Mareck, Ute, Hans Geyer, Sven Guddat, et al.. (2006). Identification of the aromatase inhibitors anastrozole and exemestane in human urine using liquid chromatography/tandem mass spectrometry. Rapid Communications in Mass Spectrometry. 20(12). 1954–1962. 41 indexed citations
11.
Thevis, Mario, Ute Bommerich, Georg Opfermann, & Wilhelm Schänzer. (2005). Characterization of chemically modified steroids for doping control purposes by electrospray ionization tandem mass spectrometry. Journal of Mass Spectrometry. 40(4). 494–502. 70 indexed citations
12.
Mareck, Ute, Gerd Sigmund, Georg Opfermann, et al.. (2005). Identification of the aromatase inhibitor letrozole in urine by gas chromatography/mass spectrometry. Rapid Communications in Mass Spectrometry. 19(24). 3689–3693. 37 indexed citations
13.
Thevis, Mario, Georg Opfermann, & Wilhelm Schänzer. (2003). Liquid chromatography/electrospray ionization tandem mass spectrometric screening and confirmation methods for β2‐agonists in human or equine urine. Journal of Mass Spectrometry. 38(11). 1197–1206. 74 indexed citations
14.
Opfermann, Georg, et al.. (2001). Screening of β-2 agonists and confirmation of fenoterol, orciprenaline, reproterol and terbutaline with gas chromatography–mass spectrometry as tetrahydroisoquinoline derivatives. Journal of Chromatography B Biomedical Sciences and Applications. 751(1). 93–105. 35 indexed citations
15.
Thevis, Mario, Georg Opfermann, & Wilhelm Schänzer. (2001). High speed determination of beta‐receptor blocking agents in human urine by liquid chromatography/tandem mass spectrometry. Biomedical Chromatography. 15(6). 393–402. 45 indexed citations
16.
17.
Thevis, Mario, Georg Opfermann, & Wilhelm Schänzer. (2000). Detection of the plasma volume expander hydroxyethyl starch in human urine. Journal of Chromatography B Biomedical Sciences and Applications. 744(2). 345–350. 32 indexed citations
18.
Thevis, Mario, et al.. (2000). Mass spectrometry of partially methylated alditol acetates derived from hydroxyethyl starch. Journal of Mass Spectrometry. 35(1). 77–84. 17 indexed citations
19.
Schänzer, W., Georg Opfermann, & Manfred Donike. (1992). 17-Epimerization of 17α-methyl anabolic steroids in humans: metabolism and synthesis of 17α-hydroxy-17β-methyl steroids. Steroids. 57(11). 537–550. 76 indexed citations
20.
Schänzer, W., Georg Opfermann, & M. Donike. (1990). Metabolism of stanozolol: Identification and synthesis of urinary metabolites. Journal of Steroid Biochemistry. 36(1-2). 153–174. 84 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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