Torkell Jøhannesson

924 total citations
42 papers, 799 citations indexed

About

Torkell Jøhannesson is a scholar working on Nutrition and Dietetics, Physiology and Cellular and Molecular Neuroscience. According to data from OpenAlex, Torkell Jøhannesson has authored 42 papers receiving a total of 799 indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Nutrition and Dietetics, 12 papers in Physiology and 11 papers in Cellular and Molecular Neuroscience. Recurrent topics in Torkell Jøhannesson's work include Trace Elements in Health (11 papers), Neurotransmitter Receptor Influence on Behavior (9 papers) and Neuroscience and Neuropharmacology Research (8 papers). Torkell Jøhannesson is often cited by papers focused on Trace Elements in Health (11 papers), Neurotransmitter Receptor Influence on Behavior (9 papers) and Neuroscience and Neuropharmacology Research (8 papers). Torkell Jøhannesson collaborates with scholars based in Iceland, United States and Denmark. Torkell Jøhannesson's co-authors include Jakob Kristinsson, Jón Snædal, L.A. Woods, Bernard Becker, William J. Steele, Sigurlaug Sveinbjörnsdóttir, Jens Schou, Stefán Hreiðarsson, Kristín Ólafsdóttir and Grétar Guðmundsson and has published in prestigious journals such as Nature, Environmental Pollution and Marine Pollution Bulletin.

In The Last Decade

Torkell Jøhannesson

42 papers receiving 724 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Torkell Jøhannesson Iceland 17 231 199 198 165 127 42 799
Dorothy E. Woolley United States 19 401 1.7× 199 1.0× 81 0.4× 109 0.7× 188 1.5× 60 1.2k
Stephen M. Lasley United States 20 357 1.5× 277 1.4× 140 0.7× 182 1.1× 319 2.5× 30 1.0k
Minoru Kawamura Japan 24 352 1.5× 293 1.5× 568 2.9× 289 1.8× 49 0.4× 86 1.6k
H. Schnieden United Kingdom 16 212 0.9× 161 0.8× 126 0.6× 80 0.5× 28 0.2× 75 800
Panagoula Angelogianni Greece 13 225 1.0× 125 0.6× 143 0.7× 110 0.7× 53 0.4× 23 678
Richard E. Butcher United States 19 169 0.7× 177 0.9× 84 0.4× 96 0.6× 168 1.3× 41 1.1k
Tangeng Ma United States 18 425 1.8× 292 1.5× 128 0.6× 57 0.3× 139 1.1× 45 955
S. Parvez France 12 146 0.6× 124 0.6× 108 0.5× 60 0.4× 30 0.2× 52 639
Marcos Luiz Santos Perry Brazil 21 136 0.6× 326 1.6× 267 1.3× 189 1.1× 51 0.4× 49 1.1k
Masayori Ozaki Japan 19 245 1.1× 316 1.6× 195 1.0× 44 0.3× 55 0.4× 73 1.1k

Countries citing papers authored by Torkell Jøhannesson

Since Specialization
Citations

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

Fields of papers citing papers by Torkell Jøhannesson

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Torkell Jøhannesson

This figure shows the co-authorship network connecting the top 25 collaborators of Torkell Jøhannesson. A scholar is included among the top collaborators of Torkell Jøhannesson 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 Torkell Jøhannesson. Torkell Jøhannesson 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.
Kristinsson, Jakob, et al.. (2011). Ceruloplasmin and Iron Proteins in the Serum of Patients with Alzheimer’s Disease. Dementia and Geriatric Cognitive Disorders Extra. 1(1). 366–371. 29 indexed citations
2.
Kristinsson, Jakob, et al.. (2010). The distribution of four trace elements (Fe, Mn, Cu, Zn) in forage and the relation to scrapie in Iceland. Acta veterinaria Scandinavica. 52(1). 34–34. 4 indexed citations
3.
Kristinsson, Jakob, Jón Snædal, Sigurlaug Sveinbjörnsdóttir, et al.. (2010). Case–control studies on ceruloplasmin and superoxide dismutase (SOD1) in neurodegenerative diseases: A short review. Journal of the Neurological Sciences. 299(1-2). 51–54. 29 indexed citations
4.
Kristinsson, Jakob, et al.. (2008). Glutathione peroxidase (GPX) activity in blood of ewes on farms in different scrapie categories in Iceland. Acta veterinaria Scandinavica. 50(1). 23–23. 3 indexed citations
5.
Sveinbjörnsdóttir, Sigurlaug, et al.. (2005). Ceruloplasmin and superoxide dismutase (SOD1) in Parkinson's disease: A follow-up study. Journal of the Neurological Sciences. 241(1-2). 53–58. 34 indexed citations
6.
Hreiðarsson, Stefán, et al.. (2005). Ceruloplasmin, Superoxide Dismutase and Copper in Autistic Patients. Basic & Clinical Pharmacology & Toxicology. 96(2). 146–148. 21 indexed citations
7.
Ólafsdóttir, Kristín, et al.. (2004). Temporal trends of organochlorine contamination in Black Guillemots in Iceland from 1976 to 1996. Environmental Pollution. 133(3). 509–515. 31 indexed citations
8.
Kristinsson, Jakob, et al.. (2000). Copper, Ceruloplasmin and Superoxide Dismutase (SOD) in Amyotrophic Lateral Sclerosis. Pharmacology & Toxicology. 87(3). 126–130. 17 indexed citations
9.
Kristinsson, Jakob, et al.. (1999). Copper, Ceruloplasmin, Superoxide Dismutase and Iron Parameters in Parkinson's Disease. Pharmacology & Toxicology. 85(s1). 239–243. 108 indexed citations
10.
Jøhannesson, Torkell, et al.. (1982). Organochlorine Compounds in Icelandic Lake Trout and Salmon Fry: Local and Global Sources of Contamination. Acta Pharmacologica et Toxicologica. 51(4). 397–400. 2 indexed citations
11.
Jøhannesson, Torkell, William J. Steele, & Bernard Becker. (1972). Infusion of Morphine in Maternal Rats at Near‐Term: Maternal and Foetal Distribution and Effects on Analgesia, Brain DNA, RNA and Protein. Acta Pharmacologica et Toxicologica. 31(5-7). 353–368. 22 indexed citations
12.
Jøhannesson, Torkell & Bernard Becker. (1972). The Effects of Maternally–administered Morphine on Rat Foetal Development and Resultant Tolerance to the Analgesic Effect of Morphine. Acta Pharmacologica et Toxicologica. 31(4). 305–313. 31 indexed citations
13.
Jøhannesson, Torkell. (1967). Morphine and codeine. The analgesic effect in tolerant and non-tolerant rats.. PubMed. 25. Suppl 3:3–83. 7 indexed citations
14.
Jøhannesson, Torkell & L.A. Woods. (1965). Interaction of the Analgesic Effects of Morphine and Codeine in Rats. Nature. 205(4973). 811–812. 7 indexed citations
15.
Jøhannesson, Torkell & L.A. Woods. (1964). Analgesic Action and Brain and Plasma Levels of Morphine and Codeine in Morphine Tolerant, Codeine Tolerant and Non‐Tolerant Rats. Acta Pharmacologica et Toxicologica. 21(4). 381–396. 84 indexed citations
16.
Jøhannesson, Torkell & John P. Long. (1964). Acetylcholine in the Brain of Morphine Tolerant and Non‐Tolerant Rats. Acta Pharmacologica et Toxicologica. 21(2). 192–196. 10 indexed citations
17.
Jøhannesson, Torkell & Jens Schou. (1963). Morphine and Normorphine in the Brains of Rats given identically analgaesic Doses of Morphine, Codeine or Normorphine *. Acta Pharmacologica et Toxicologica. 20(2). 165–173. 35 indexed citations
18.
Jøhannesson, Torkell, et al.. (1963). The Lethal Action of Morphine and Nalorphine given jointly to Morphine Tolerant and Non‐Tolerant Rats. Acta Pharmacologica et Toxicologica. 20(1). 80–89. 8 indexed citations
19.
Jøhannesson, Torkell & Jens Schou. (1963). Analgesic Activity and Brain Concentration of Morphine in Tolerant and Non‐Tolerant Rats given Morphine alone or with Neostigmine. Acta Pharmacologica et Toxicologica. 20(3). 213–221. 12 indexed citations
20.
Jøhannesson, Torkell. (1962). Morphine as an Inhibitor of Brain Cholinesterases in Morphine‐Tolerant and Non‐Tolerant Rats. Acta Pharmacologica et Toxicologica. 19(1). 23–35. 20 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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