A. Hamann

9.2k total citations · 3 hit papers
94 papers, 6.1k citations indexed

About

A. Hamann is a scholar working on Physiology, Endocrinology, Diabetes and Metabolism and Molecular Biology. According to data from OpenAlex, A. Hamann has authored 94 papers receiving a total of 6.1k indexed citations (citations by other indexed papers that have themselves been cited), including 46 papers in Physiology, 31 papers in Endocrinology, Diabetes and Metabolism and 30 papers in Molecular Biology. Recurrent topics in A. Hamann's work include Adipose Tissue and Metabolism (30 papers), Metabolism, Diabetes, and Cancer (19 papers) and Diabetes Treatment and Management (18 papers). A. Hamann is often cited by papers focused on Adipose Tissue and Metabolism (30 papers), Metabolism, Diabetes, and Cancer (19 papers) and Diabetes Treatment and Management (18 papers). A. Hamann collaborates with scholars based in Germany, United States and France. A. Hamann's co-authors include Jeffrey S. Flier, Bradford B. Lowell, Robert Frederich, Stephen Anderson, Leslie P. Kozak, Joel Lawitts, Bert B. Boyer, Jean Himms‐Hagen, Antonio Vidal‐Puig and Peter P. Nawroth and has published in prestigious journals such as Nature, Journal of Biological Chemistry and Journal of Clinical Investigation.

In The Last Decade

A. Hamann

89 papers receiving 5.9k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Leptin levels reflect body lipid content in mice: Evidence for diet-induced resistance to leptin action

1995 1.4k citations Robert Frederich, A. Hamann et al. Nature Medicine profile →
Development of obesity in transgenic mice after genetic ablation of brown adipose tissue

1993 881 citations Bradford B. Lowell, A. Hamann et al. profile →
Regulation of PPAR gamma gene expression by nutrition and obesity in rodents.

1996 558 citations Antonio Vidal‐Puig, Bradford B. Lowell et al. Journal of Clinical Investigation profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
A. Hamann Germany	33	3.0k	2.1k	2.0k	1.4k	1.1k	94	6.1k
Fredrik Lönnqvist Sweden	36	3.8k 1.3×	2.3k 1.1×	1.7k 0.9×	1.4k 1.0×	810 0.7×	63	6.4k
Véronique Pelloux France	30	2.8k 0.9×	2.1k 1.0×	1.7k 0.8×	1.1k 0.8×	1.0k 0.9×	44	5.5k
José Barreto Campello Carvalheira Brazil	46	2.9k 1.0×	1.5k 0.7×	1.6k 0.8×	2.1k 1.5×	777 0.7×	141	6.8k
Jean L. Chan United States	38	2.6k 0.9×	2.6k 1.2×	3.1k 1.6×	880 0.6×	1.0k 0.9×	64	6.5k
Meredith Hawkins United States	39	3.3k 1.1×	2.8k 1.4×	1.7k 0.9×	2.3k 1.6×	835 0.7×	82	7.5k
Janet E. Digby United Kingdom	30	2.1k 0.7×	1.7k 0.8×	2.1k 1.1×	784 0.6×	1.1k 1.0×	42	5.2k
Elizabeth Montague United Kingdom	16	2.7k 0.9×	1.7k 0.8×	2.5k 1.3×	1.1k 0.8×	1.3k 1.2×	29	5.3k
Karine Clément France	35	2.1k 0.7×	1.4k 0.6×	2.1k 1.1×	1.2k 0.9×	1.3k 1.1×	74	5.2k
Yves Deshaies Canada	47	3.5k 1.2×	2.2k 1.1×	915 0.5×	2.2k 1.6×	634 0.6×	181	7.3k
Matthias Möhlig Germany	42	2.5k 0.8×	2.7k 1.3×	1.1k 0.5×	1.9k 1.4×	802 0.7×	111	7.6k

Countries citing papers authored by A. Hamann

Since Specialization

Citations

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

Fields of papers citing papers by A. Hamann

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of A. Hamann

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

All Works

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20 of 20 papers shown

Landgraf, R., Monika Kellerer, Baptist Gallwitz, et al.. (2013). Praxisempfehlungen DDG/DGIM : Therapie des Typ-2-Diabetes. Diabetologie und Stoffwechsel. 8. 6 indexed citations

Hamann, A. & S. Matthäei. (2009). Regulation of energy balance by leptin. Experimental and Clinical Endocrinology & Diabetes. 104(4). 293–300. 77 indexed citations

Humpert, Per M., Michael Morcos, Dimitrios Oikonomou, et al.. (2009). External Electric Muscle Stimulation Improves Burning Sensations and Sleeping Disturbances in Patients with Type 2 Diabetes and Symptomatic Neuropathy. Pain Medicine. 10(2). 413–419. 19 indexed citations

Rudofsky, Gottfried, Andreas Schlotterer, Berend Isermann, et al.. (2006). Functional Polymorphisms of UCP2 and UCP3 Are Associated With a Reduced Prevalence of Diabetic Neuropathy in Patients With Type 1 Diabetes. Diabetes Care. 29(1). 89–94. 53 indexed citations

Toplak, Hermann, A. Hamann, Rema Moore, et al.. (2006). Efficacy and safety of topiramate in combination with metformin in the treatment of obese subjects with type 2 diabetes: a randomized, double-blind, placebo-controlled study. International Journal of Obesity. 31(1). 138–146. 60 indexed citations

Stewart, Murray, Deborah T. Cirkel, Kristian Furuseth, et al.. (2006). Effect of metformin plus roziglitazone compared with metformin alone on glycaemic control in well‐controlled Type 2 diabetes. Diabetic Medicine. 23(10). 1069–1078. 29 indexed citations

Hamann, A., Michael Morcos, & Peter P. Nawroth. (2004). [Oral diabetes treatment. Which substance is indicated at which time?].. Der Internist. 45(12). 1356–63. 2 indexed citations

Rudofsky, Gottfried, Andrea Schlotterer, Maximilian von Eynatten, et al.. (2004). No association of the 94T/G polymorphism in the adiponectin gene with diabetic complications. Diabetes Obesity and Metabolism. 7(4). 455–459. 14 indexed citations

Oberdorfer, K., Stefanie Swoboda, A. Hamann, et al.. (2004). Tissue and serum levofloxacin concentrations in diabetic foot infection patients. Journal of Antimicrobial Chemotherapy. 54(4). 836–839. 21 indexed citations

10.

Hamann, A., Michael Morcos, & Peter P. Nawroth. (2004). Orale Diabetestherapie. Der Internist. 45(12). 1356–1363. 1 indexed citations

11.

Rudofsky, Gottfried, Péter Reismann, Stephan Schiekofer, et al.. (2004). Reduction of Postprandial Hyperglycemia in Patients with Type 2 Diabetes Reduces NF-κB Activation in PBMCs. Hormone and Metabolic Research. 36(9). 630–638. 48 indexed citations

12.

Hamann, A. & Arya M. Sharma. (2002). Genetics of obesity and obesity-related hypertension. Seminars in Nephrology. 22(2). 100–104. 5 indexed citations

13.

Hamann, A., Heike Münzberg, Anke Hinney, et al.. (2001). Identification of a deletion variant in the gene encoding the human alpha(2A)-adrenergic receptor. European Journal of Endocrinology. 144(3). 291–295. 10 indexed citations

14.

Hamann, A., Heike Münzberg, Anke Hinney, et al.. (1999). Missense variants in the human peroxisome proliferator-activated receptor-gamma2 gene in lean and obese subjects. European Journal of Endocrinology. 141(1). 90–92. 46 indexed citations

15.

Hamann, A., Heike Münzberg, Anke Hinney, et al.. (1998). Analysis of the uncoupling protein-1 (UCP1) gene in obese and lean subjects: Identification of four amino acid variants. International Journal of Obesity. 22(9). 939–941. 31 indexed citations

16.

Hamann, A.. (1996). Decreased brown fat markedly enhances susceptibility to diet-induced obesity, diabetes, and hyperlipidemia. Endocrinology. 137(1). 21–29. 38 indexed citations

17.

Frederich, Robert, et al.. (1995). Leptin levels reflect body lipid content in mice: Evidence for diet-induced resistance to leptin action. Nature Medicine. 1(12). 1311–1314. 1368 indexed citations breakdown →

18.

Hamann, A., C. S. Mantzoros, Antonio Vidal‐Puig, & Jeffrey S. Flier. (1995). Genetic Variability in the TNF-α Promoter Is Not Associated with Type II Diabetes Mellitus (NIDDM). Biochemical and Biophysical Research Communications. 211(3). 833–839. 123 indexed citations

19.

Frederich, Robert, et al.. (1995). Expression of ob mRNA and its encoded protein in rodents. Impact of nutrition and obesity.. Journal of Clinical Investigation. 96(3). 1658–1663. 483 indexed citations

20.

Lowell, Bradford B., Vedrana S. Susulic, A. Hamann, et al.. (1993). Development of morbid obesity in transgenic mice following the genetic ablation of brown adipose tissue. Clinical research. 41(2). 260. 8 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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