Ulrich Flenker

1.7k total citations
54 papers, 1.4k citations indexed

About

Ulrich Flenker is a scholar working on Endocrinology, Diabetes and Metabolism, Cell Biology and Ecology. According to data from OpenAlex, Ulrich Flenker has authored 54 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 25 papers in Endocrinology, Diabetes and Metabolism, 20 papers in Cell Biology and 16 papers in Ecology. Recurrent topics in Ulrich Flenker's work include Hormonal and reproductive studies (23 papers), Muscle metabolism and nutrition (19 papers) and Isotope Analysis in Ecology (16 papers). Ulrich Flenker is often cited by papers focused on Hormonal and reproductive studies (23 papers), Muscle metabolism and nutrition (19 papers) and Isotope Analysis in Ecology (16 papers). Ulrich Flenker collaborates with scholars based in Germany, United States and Canada. Ulrich Flenker's co-authors include Wilhelm Schänzer, Thomas Piper, Mario Thevis, Ute Mareck, Hans Geyer, Adam Cawley, Wilhelm Schaenzer, Karsten Koehler, Patrick Diel and Petra Platen and has published in prestigious journals such as Analytical Chemistry, Journal of Agricultural and Food Chemistry and Food Chemistry.

In The Last Decade

Ulrich Flenker

53 papers receiving 1.3k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Ulrich Flenker Germany	24	744	386	299	256	242	54	1.4k
Borislav Starcevic United States	9	901 1.2×	302 0.8×	292 1.0×	37 0.1×	148 0.6×	9	1.1k
Jean‐Philippe Godin Switzerland	20	109 0.1×	120 0.3×	91 0.3×	228 0.9×	110 0.5×	47	1.3k
D. Tim Harwood New Zealand	27	287 0.4×	41 0.1×	36 0.1×	343 1.3×	135 0.6×	67	2.0k
T. E. Chapman United States	22	219 0.3×	314 0.8×	146 0.5×	92 0.4×	52 0.2×	46	1.6k
Claude Leray France	26	91 0.1×	132 0.3×	121 0.4×	360 1.4×	80 0.3×	87	2.4k
Stanley M. Tarka United States	18	115 0.2×	43 0.1×	68 0.2×	39 0.2×	32 0.1×	38	1.1k
Marie Togashi United States	18	369 0.5×	59 0.2×	74 0.2×	49 0.2×	23 0.1×	23	1.2k
Kerstin Stemmer Germany	25	302 0.4×	126 0.3×	11 0.0×	70 0.3×	48 0.2×	45	1.9k
H. M. Sinclair United Kingdom	15	165 0.2×	128 0.3×	85 0.3×	40 0.2×	19 0.1×	62	1.7k
J.S. Charnock Australia	26	144 0.2×	130 0.3×	173 0.6×	103 0.4×	44 0.2×	74	2.0k

Countries citing papers authored by Ulrich Flenker

Since Specialization

Citations

This map shows the geographic impact of Ulrich Flenker'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 Ulrich Flenker with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ulrich Flenker more than expected).

Fields of papers citing papers by Ulrich Flenker

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ulrich Flenker. 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 Ulrich Flenker. The network helps show where Ulrich Flenker may publish in the future.

Co-authorship network of co-authors of Ulrich Flenker

This figure shows the co-authorship network connecting the top 25 collaborators of Ulrich Flenker. A scholar is included among the top collaborators of Ulrich Flenker 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 Ulrich Flenker. Ulrich Flenker is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Isenmann, Eduard, et al.. (2024). Differences in Consumption Behaviour of Dietary Supplements in Competitive Athletes Depends on Sports Discipline. Nutrients. 16(3). 374–374. 6 indexed citations

Isenmann, Eduard, et al.. (2024). Influence of short-term chronic oral cannabidiol application on muscle recovery and performance after an intensive training protocol - a randomized double-blind crossover study. Journal of the International Society of Sports Nutrition. 21(1). 2337252–2337252. 9 indexed citations

Isenmann, Eduard, et al.. (2024). Short-term repeated oral intake of low dose cannabidiol: effects on liver enzyme activity and creatinine concentration during intense exercise. Archives of Toxicology. 99(2). 815–824. 1 indexed citations

Isenmann, Eduard, et al.. (2023). The Anabolic Effect of Fenugreek: A Systematic Review with Meta-analysis. International Journal of Sports Medicine. 44(10). 692–703. 2 indexed citations

Fußhöller, Gregor, et al.. (2018). Case Study: Atypical δ¹³C values of urinary norandrosterone. Drug Testing and Analysis. 10(11-12). 1728–1733. 9 indexed citations

Koehler, Karsten, et al.. (2017). Do we excrete what we eat? Analysis of stable nitrogen isotope ratios of human urinary urea. Rapid Communications in Mass Spectrometry. 31(14). 1221–1227. 3 indexed citations

Koehler, Karsten, Jürgen Wittsiepe, Michael Wilhelm, et al.. (2017). Prediction of human dietary δ¹⁵N intake from standardised food records: validity and precision of single meal and 24-h diet data. Isotopes in Environmental and Health Studies. 53(4). 356–367. 6 indexed citations

Weigt, Carmen, et al.. (2015). Effects of estradiol, estrogen receptor subtype-selective agonists and genistein on glucose metabolism in leptin resistant female Zucker diabetic fatty (ZDF) rats. The Journal of Steroid Biochemistry and Molecular Biology. 154. 12–22. 30 indexed citations

Weigt, Carmen, Torsten Hertrampf, Felix M. Kluxen, et al.. (2013). Molecular effects of ER alpha- and beta-selective agonists on regulation of energy homeostasis in obese female Wistar rats. Molecular and Cellular Endocrinology. 377(1-2). 147–158. 57 indexed citations

10.

Friedmann, Theodore, Ulrich Flenker, Costas Georgakopoulos, et al.. (2012). Evolving Concepts And Techniques For Anti-Doping. Bioanalysis. 4(13). 1667–1680. 6 indexed citations

11.

Parr, Maria Kristina, Ulrich Flenker, & Wilhelm Schänzer. (2010). Sports-Related Issues and Biochemistry of Natural and Synthetic Anabolic Substances. Endocrinology and Metabolism Clinics of North America. 39(1). 45–57. 27 indexed citations

12.

Guddat, Sven, H. Geyer, Ulrich Flenker, et al.. (2010). Rapid determination of urinary di(2-ethylhexyl) phthalate metabolites based on liquid chromatography/tandem mass spectrometry as a marker for blood transfusion in sports drug testing. Analytical and Bioanalytical Chemistry. 401(2). 517–528. 33 indexed citations

13.

Parr, Maria Kristina, Adam Cawley, Ulrich Flenker, et al.. (2009). Development of criteria for the detection of adrenosterone administration by gas chromatography‐mass spectrometry and gas chromatography‐combustion‐isotope ratio mass spectrometry for doping control. Drug Testing and Analysis. 1(11-12). 587–595. 22 indexed citations

14.

Piper, Thomas, Ulrich Flenker, Ute Mareck, & Wilhelm Schänzer. (2009). ¹³C/¹²C Ratios of endogenous urinary steroids investigated for doping control purposes. Drug Testing and Analysis. 1(2). 65–72. 58 indexed citations

15.

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

16.

Voss, Sven Christian, et al.. (2008). Stability Tests for Hematological Parameters in Antidoping Analyses. PubMed. 14(3). 24–29. 18 indexed citations

17.

Cawley, Adam & Ulrich Flenker. (2008). The application of carbon isotope ratio mass spectrometry to doping control. Journal of Mass Spectrometry. 43(7). 854–864. 103 indexed citations

18.

Piper, Thomas, Ute Mareck, Hans Geyer, et al.. (2008). Determination of ¹³ C/ ¹² C ratios of endogenous urinary steroids: method validation, reference population and application to doping control purposes. Rapid Communications in Mass Spectrometry. 22(14). 2161–2175. 142 indexed citations

19.

Flenker, Ulrich, et al.. (2007). Isolation of bicarbonate from equine urine for isotope ratio mass spectrometry†. Isotopes in Environmental and Health Studies. 43(4). 267–273. 1 indexed citations

20.

Thevis, Mario, Hans Geyer, Ute Mareck, Ulrich Flenker, & Wilhelm Schänzer. (2007). Doping-Control Analysis of the 5α-Reductase Inhibitor Finasteride: Determination of Its Influence on Urinary Steroid Profiles and Detection of Its Major Urinary Metabolite. Therapeutic Drug Monitoring. 29(2). 236–247. 38 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.

Explore authors with similar magnitude of impact