Ralf G. Hempelmann

447 total citations
21 papers, 354 citations indexed

About

Ralf G. Hempelmann is a scholar working on Molecular Biology, Cellular and Molecular Neuroscience and Neurology. According to data from OpenAlex, Ralf G. Hempelmann has authored 21 papers receiving a total of 354 indexed citations (citations by other indexed papers that have themselves been cited), including 7 papers in Molecular Biology, 7 papers in Cellular and Molecular Neuroscience and 7 papers in Neurology. Recurrent topics in Ralf G. Hempelmann's work include Nitric Oxide and Endothelin Effects (6 papers), Ion channel regulation and function (5 papers) and Intracerebral and Subarachnoid Hemorrhage Research (5 papers). Ralf G. Hempelmann is often cited by papers focused on Nitric Oxide and Endothelin Effects (6 papers), Ion channel regulation and function (5 papers) and Intracerebral and Subarachnoid Hemorrhage Research (5 papers). Ralf G. Hempelmann collaborates with scholars based in Germany, Australia and Egypt. Ralf G. Hempelmann's co-authors include Albrecht Ziegler, H. Maximilian Mehdorn, Ralf Buhl, R Schön, Harald Barth, H. M. Mehdorn, H.‐H. Hugo, F Schröder, Jörg Seebeck and Stefan Herzig and has published in prestigious journals such as Journal of neurosurgery, British Journal of Pharmacology and Neurosurgery.

In The Last Decade

Ralf G. Hempelmann

21 papers receiving 342 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ralf G. Hempelmann Germany 13 154 92 71 71 59 21 354
Ruurd F Duyff Netherlands 3 85 0.6× 40 0.4× 56 0.8× 25 0.4× 64 1.1× 3 298
K U Frerichs United States 9 137 0.9× 43 0.5× 32 0.5× 56 0.8× 55 0.9× 10 324
Dildar Ahmad Canada 10 158 1.0× 73 0.8× 91 1.3× 64 0.9× 21 0.4× 21 391
Sami Abu Hamdeh Sweden 13 231 1.5× 48 0.5× 94 1.3× 114 1.6× 108 1.8× 23 449
D Melançon Canada 10 158 1.0× 65 0.7× 62 0.9× 34 0.5× 54 0.9× 32 371
Said R. Beydoun United States 12 391 2.5× 144 1.6× 45 0.6× 45 0.6× 55 0.9× 54 593
Anna Szczepańska-Szerej Poland 9 87 0.6× 79 0.9× 37 0.5× 63 0.9× 28 0.5× 25 259
Michito Adachi Japan 10 286 1.9× 44 0.5× 55 0.8× 34 0.5× 40 0.7× 18 437
Yves R. Tran Dinh France 10 244 1.6× 44 0.5× 23 0.3× 46 0.6× 51 0.9× 11 411
C Rivano Italy 12 254 1.6× 86 0.9× 148 2.1× 50 0.7× 25 0.4× 32 452

Countries citing papers authored by Ralf G. Hempelmann

Since Specialization
Citations

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

Fields of papers citing papers by Ralf G. Hempelmann

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ralf G. Hempelmann. 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 Ralf G. Hempelmann. The network helps show where Ralf G. Hempelmann may publish in the future.

Co-authorship network of co-authors of Ralf G. Hempelmann

This figure shows the co-authorship network connecting the top 25 collaborators of Ralf G. Hempelmann. A scholar is included among the top collaborators of Ralf G. Hempelmann 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 Ralf G. Hempelmann. Ralf G. Hempelmann 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.
Hempelmann, Ralf G., et al.. (2012). Remote intracranial parenchymal haematomas as complications of spinal surgery: presentation of three cases with minor or untypical symptoms. European Spine Journal. 21(S4). 564–568. 18 indexed citations
2.
3.
Hempelmann, Ralf G., et al.. (2007). Complete resection of a cavernous haemangioma of the optic nerve, the chiasm, and the optic tract. Acta Neurochirurgica. 149(7). 699–703. 38 indexed citations
4.
Zhan, Renya, Ying Tong, Jianfeng Shen, et al.. (2004). Study of clinical features of amyloid angiopathy hemorrhage and hypertensive intracerebral hemorrhage. Journal of Zhejiang University. Science A. 5(10). 1262–1269. 21 indexed citations
5.
Petridis, Athanasios K., Ralf G. Hempelmann, H.‐H. Hugo, Thomas O. Eichmann, & H. M. Mehdorn. (2004). Metastatic low-grade inflammatory myofibroblastic tumor (IMT) in the central nervous system of a 29-year-old male patient.. PubMed. 23(4). 158–66. 18 indexed citations
6.
Lang, Erhard W., et al.. (2003). Subarachnoid hemorrhage of unknown origin and the basilar artery configuration. Journal of Clinical Neuroscience. 10(1). 74–78. 9 indexed citations
7.
8.
Hempelmann, Ralf G., Harald Barth, Ralf Buhl, & H. M. Mehdorn. (2002). Clinical Outcome after Surgery of Intracranial Unruptured Aneurysms: Results of a Series Between 1991 and 2001. PubMed. 82. 51–54. 5 indexed citations
9.
Buhl, Ralf, et al.. (2002). Therapeutical considerations in patients with intracranial venous angiomas. European Journal of Neurology. 9(2). 165–169. 31 indexed citations
10.
Hempelmann, Ralf G., Jörg Seebeck, Marie‐Luise Kruse, Albrecht Ziegler, & H. M. Mehdorn. (2001). Role of potassium channels in the relaxation induced by the nitric oxide (NO) donor DEA/NO in the isolated rat basilar artery. Neuroscience Letters. 313(1-2). 21–24. 20 indexed citations
11.
Lang, Erhard W., Christoph Preul, Heinz‐Hermann Hugo, et al.. (2001). Stroke Pattern Interpretation: The Variability of Hypertensive versus Amyloid Angiopathy Hemorrhage. Cerebrovascular Diseases. 12(2). 121–130. 25 indexed citations
12.
Buhl, Ralf, H.‐H. Hugo, Ralf G. Hempelmann, Harald Barth, & H. M. Mehdorn. (2001). Granular-cell tumour: a rare suprasellar mass. Neuroradiology. 43(4). 309–312. 27 indexed citations
13.
Hempelmann, Ralf G., Jörg Seebeck, Albrecht Ziegler, & H. Maximilian Mehdorn. (2000). Effects of potassium channel inhibitors on the relaxation induced by the NO donor DEA/NO in isolated human cerebral arteries. Journal of neurosurgery. 93(6). 1048–1054. 8 indexed citations
14.
Hempelmann, Ralf G., et al.. (1999). Threshold Concentrations of Endothelin‐1: The Effects on Contractions Induced by 5‐Hydroxytryptamine in Isolated Rat Cerebral and Mesenteric Arteries *. Pharmacology & Toxicology. 85(5). 115–122. 8 indexed citations
15.
Hempelmann, Ralf G., et al.. (1998). Contractions induced by NO synthase inhibition in isolated rat basilar artery: Role of the endothelium and endogeneous vasoconstrictors. Neurological Research. 20(1). 63–72. 12 indexed citations
16.
Hempelmann, Ralf G., et al.. (1997). Interactions between vasoconstrictors in isolated human cerebral arteries. Acta Neurochirurgica. 139(6). 574–582. 13 indexed citations
17.
Hempelmann, Ralf G., et al.. (1995). Non-synergistic relaxant effects of vasoactive intestinal polypeptide and SIN-1 in human isolated cavernous artery and corpus cavernosum. European Journal of Pharmacology. 276(3). 277–280. 13 indexed citations
18.
Hempelmann, Ralf G., et al.. (1995). Effects of Potassium Channel Openers in Isolated Human Cerebral Arteries. Neurosurgery. 37(6). 1146–1153. 12 indexed citations
19.
Hempelmann, Ralf G. & Albrecht Ziegler. (1993). Endothelium‐dependent noradrenaline‐induced relaxation of rat isolated cerebral arteries: pharmacological characterization of receptor subtypes involved. British Journal of Pharmacology. 110(4). 1321–1328. 24 indexed citations
20.
Hempelmann, Ralf G., et al.. (1991). Modulation of Ouabain Binding in Beating Ventricular Myocardium from Guinea‐Pigs: Effects of Lidocaine and Monensin. Pharmacology & Toxicology. 68(4). 243–248. 4 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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