Sigfús Nikulásson

2.2k total citations
23 papers, 1.2k citations indexed

About

Sigfús Nikulásson is a scholar working on Infectious Diseases, Surgery and Gastroenterology. According to data from OpenAlex, Sigfús Nikulásson has authored 23 papers receiving a total of 1.2k indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Infectious Diseases, 9 papers in Surgery and 9 papers in Gastroenterology. Recurrent topics in Sigfús Nikulásson's work include Gastrointestinal motility and disorders (9 papers), Clostridium difficile and Clostridium perfringens research (9 papers) and Helicobacter pylori-related gastroenterology studies (5 papers). Sigfús Nikulásson is often cited by papers focused on Gastrointestinal motility and disorders (9 papers), Clostridium difficile and Clostridium perfringens research (9 papers) and Helicobacter pylori-related gastroenterology studies (5 papers). Sigfús Nikulásson collaborates with scholars based in United States, Iceland and Israel. Sigfús Nikulásson's co-authors include Ignazio Castagliuolo, Charalabos Pothoulakis, Bosheng Qiu, Asiya Pasha, J. Thomas LaMont, Ciarán P. Kelly, Andrew C. Keates, Susan E. Leeman, Leyla Valenick and Conan Kornetsky and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Journal of Clinical Investigation and The Journal of Immunology.

In The Last Decade

Sigfús Nikulásson

23 papers receiving 1.1k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Sigfús Nikulásson United States 16 376 340 271 255 249 23 1.2k
Bosheng Qiu United States 16 398 1.1× 202 0.6× 218 0.8× 295 1.2× 248 1.0× 20 1.4k
Rami T. El–Sharkawy Canada 10 333 0.9× 70 0.2× 87 0.3× 276 1.1× 224 0.9× 12 933
Elroy Vojdani United States 17 124 0.3× 225 0.7× 103 0.4× 254 1.0× 89 0.4× 32 1.1k
Francesca Mangiola Italy 14 226 0.6× 133 0.4× 130 0.5× 759 3.0× 190 0.8× 34 1.4k
Mar Gacias United States 9 149 0.4× 171 0.5× 84 0.3× 1.2k 4.6× 50 0.2× 13 1.6k
Elyanne M. Ratcliffe Canada 19 394 1.0× 82 0.2× 151 0.6× 615 2.4× 302 1.2× 45 1.4k
Jeroen Visser Netherlands 16 168 0.4× 85 0.3× 24 0.1× 390 1.5× 159 0.6× 22 1.1k
Kalpesh Patel United States 19 88 0.2× 111 0.3× 60 0.2× 227 0.9× 176 0.7× 36 1.1k
Fanny Matheis United States 10 172 0.5× 75 0.2× 49 0.2× 412 1.6× 138 0.6× 11 999
C. A. Ottaway Canada 14 77 0.2× 35 0.1× 529 2.0× 348 1.4× 118 0.5× 26 1.0k

Countries citing papers authored by Sigfús Nikulásson

Since Specialization
Citations

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

Fields of papers citing papers by Sigfús Nikulásson

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Sigfús Nikulásson

This figure shows the co-authorship network connecting the top 25 collaborators of Sigfús Nikulásson. A scholar is included among the top collaborators of Sigfús Nikulásson 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 Sigfús Nikulásson. Sigfús Nikulásson 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.
Jónsson, Eiríkur, et al.. (2021). Operative management in patients with upper tract urothelial carcinoma in Iceland: a population-based study. Scandinavian Journal of Urology. 55(3). 197–202. 1 indexed citations
2.
Nikulásson, Sigfús, et al.. (2010). Thymic epithelial tumours in Iceland: incidence and histopathology, a population‐based study. Apmis. 118(12). 927–933. 4 indexed citations
3.
Castagliuolo, Ignazio, Chi‐Chuan Wang, Leyla Valenick, et al.. (1999). Neurotensin is a proinflammatory neuropeptide in colonic inflammation. Journal of Clinical Investigation. 103(6). 843–849. 106 indexed citations
4.
Qiu, Bosheng, Charalabos Pothoulakis, Ignazio Castagliuolo, Sigfús Nikulásson, & J. Thomas LaMont. (1999). Participation of reactive oxygen metabolites inClostridium difficiletoxin A-induced enteritis in rats. American Journal of Physiology-Gastrointestinal and Liver Physiology. 276(2). G485–G490. 42 indexed citations
5.
Fogt, Franz, R.L. Zimmerman, Niall Mulligan, et al.. (1999). BCL-2 expression and inhibin-A in adrenal neoplasms: a comparative study.. International Journal of Molecular Medicine. 3(3). 271–4. 5 indexed citations
6.
Castagliuolo, Ignazio, Andrew C. Keates, Asiya Pasha, et al.. (1998). Clostridium difficile Toxin A Stimulates Macrophage- Inflammatory Protein-2 Production in Rat Intestinal Epithelial Cells. The Journal of Immunology. 160(12). 6039–6045. 80 indexed citations
7.
Castagliuolo, Ignazio, Martin Riegler, Asiya Pasha, et al.. (1998). Neurokinin-1 (NK-1) receptor is required in Clostridium difficile- induced enteritis.. Journal of Clinical Investigation. 101(8). 1547–1550. 147 indexed citations
8.
Castagliuolo, Ignazio, Barry K. Wershil, Katia Karalis, et al.. (1998). Colonic mucin release in response to immobilization stress is mast cell dependent. American Journal of Physiology-Gastrointestinal and Liver Physiology. 274(6). G1094–G1100. 81 indexed citations
9.
Keates, Andrew C., et al.. (1998). CGRP upregulation in dorsal root ganglia and ileal mucosa duringClostridium difficiletoxin A-induced enteritis. American Journal of Physiology-Gastrointestinal and Liver Physiology. 274(1). G196–G202. 40 indexed citations
10.
Nikulásson, Sigfús, et al.. (1998). Increased neurotensin receptor (NTR) mRNA in the colonic mucosa during clostriudium difficile pseudomembranous colitis (PMC) in humans. Gastroenterology. 114. A1058–A1058. 2 indexed citations
11.
Gibbons, Don L., Franz Fogt, John Kasznica, Joseph A. Holden, & Sigfús Nikulásson. (1997). Comparison of topoisomerase II alpha and MIB-1 expression in uterine cervical squamous lesions.. PubMed. 10(5). 409–13. 27 indexed citations
12.
Fogt, Franz, et al.. (1997). Topoisomerase II alpha expression in normal, inflammatory, and neoplastic conditions of the gastric and colonic mucosa.. PubMed. 10(4). 296–302. 16 indexed citations
13.
Castagliuolo, Ignazio, Andrew C. Keates, Bosheng Qiu, et al.. (1997). Increased substance P responses in dorsal root ganglia and intestinal macrophages duringClostridium difficiletoxin A enteritis in rats. Proceedings of the National Academy of Sciences. 94(9). 4788–4793. 136 indexed citations
14.
Pothoulakis, C, Uri Galili, Ignazio Castagliuolo, et al.. (1996). A human antibody binds to alpha-galactose receptors and mimics the effects of Clostridium difficile toxin A in rat colon. Gastroenterology. 110(6). 1704–1712. 18 indexed citations
15.
Pothoulakis, C, Christos Cladaras, Ignazio Castagliuolo, et al.. (1996). Rabbit sucrase-isomaltase contains a functional intestinal receptor for Clostridium difficile toxin A.. Journal of Clinical Investigation. 98(3). 641–649. 93 indexed citations
16.
Castagliuolo, Ignazio, Susan E. Leeman, Erzsébet Bartolák‐Suki, et al.. (1996). A neurotensin antagonist, SR 48692, inhibits colonic responses to immobilization stress in rats.. Proceedings of the National Academy of Sciences. 93(22). 12611–12615. 60 indexed citations
17.
Kramer, Phillip R., et al.. (1995). Endoscopic features of long-standing primary intestinal lymphangiectasia. Gastrointestinal Endoscopy. 41(5). 516–518. 9 indexed citations
18.
Nikulásson, Sigfús, Charles W. Andrews, Harvey Goldman, et al.. (1995). Sucrase-Isomaltase Expression in Dysplasia Associated With Barrett's Esophagus and Chronic Gastritis. International Journal of Surgical Pathology. 2(4). 281–286. 3 indexed citations
19.
Smith, Thomas W., et al.. (1993). Immunohistochemistry of synapsin I and synaptophysin in human nervous system and neuroendocrine tumors. Applications in diagnostic neuro-oncology.. PubMed. 12(6). 335–42. 26 indexed citations
20.
Fram, Daniel B., Linda D. Gillam, Thomas Aretz, et al.. (1993). Low pressure radiofrequency balloon angioplasty: Evaluation in porcine peripheral arteries. Journal of the American College of Cardiology. 21(6). 1512–1521. 24 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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