Jorma Kärkkäinen

1.8k total citations
51 papers, 1.3k citations indexed

About

Jorma Kärkkäinen is a scholar working on Molecular Biology, Spectroscopy and Organic Chemistry. According to data from OpenAlex, Jorma Kärkkäinen has authored 51 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Molecular Biology, 11 papers in Spectroscopy and 8 papers in Organic Chemistry. Recurrent topics in Jorma Kärkkäinen's work include Analytical Chemistry and Chromatography (11 papers), Glycosylation and Glycoproteins Research (9 papers) and Reproductive System and Pregnancy (7 papers). Jorma Kärkkäinen is often cited by papers focused on Analytical Chemistry and Chromatography (11 papers), Glycosylation and Glycoproteins Research (9 papers) and Reproductive System and Pregnancy (7 papers). Jorma Kärkkäinen collaborates with scholars based in Finland. Jorma Kärkkäinen's co-authors include Susanne Somersalo, Pirjo Mäkelä, Heikki Rauvala, Jukka Finne, T. Nikkari, Tom Krusius, Johan Järnefelt, E. Haahti, Aapo Lehtonen and Ilkka Mononen and has published in prestigious journals such as Analytical Chemistry, Biological Psychiatry and FEBS Letters.

In The Last Decade

Jorma Kärkkäinen

51 papers receiving 1.2k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Jorma Kärkkäinen Finland 21 456 244 224 162 159 51 1.3k
A. J. Smith United Kingdom 17 438 1.0× 86 0.4× 74 0.3× 53 0.3× 93 0.6× 40 1.5k
Barry M. Weichman United States 23 640 1.4× 177 0.7× 62 0.3× 56 0.3× 71 0.4× 68 2.1k
A.C. Pollard Australia 21 385 0.8× 102 0.4× 150 0.7× 74 0.5× 142 0.9× 68 1.4k
Atsuko Takeuchi Japan 25 715 1.6× 76 0.3× 142 0.6× 258 1.6× 124 0.8× 112 1.9k
Derek A. Applegarth Canada 26 1.2k 2.7× 104 0.4× 65 0.3× 100 0.6× 86 0.5× 131 2.5k
Lars‐Erik Appelgren Sweden 23 391 0.9× 58 0.2× 158 0.7× 61 0.4× 76 0.5× 95 1.5k
I. D. Desai Canada 21 502 1.1× 113 0.5× 100 0.4× 372 2.3× 71 0.4× 64 1.6k
Koichi Itaya Japan 10 771 1.7× 51 0.2× 140 0.6× 217 1.3× 233 1.5× 24 1.8k
Demetrios S. Sgoutas United States 26 506 1.1× 95 0.4× 19 0.1× 527 3.3× 383 2.4× 76 2.1k
Onard Schoneveld Netherlands 10 829 1.8× 92 0.4× 161 0.7× 122 0.8× 108 0.7× 12 1.8k

Countries citing papers authored by Jorma Kärkkäinen

Since Specialization
Citations

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

Fields of papers citing papers by Jorma Kärkkäinen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Jorma Kärkkäinen

This figure shows the co-authorship network connecting the top 25 collaborators of Jorma Kärkkäinen. A scholar is included among the top collaborators of Jorma Kärkkäinen 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 Jorma Kärkkäinen. Jorma Kärkkäinen 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.
Kuosmanen, Lauri, Riittakerttu Kaltiala‐Heino, Sakari Suominen, et al.. (2008). Patient complaints in Finland 2000–2004: a retrospective register study. Journal of Medical Ethics. 34(11). 788–792. 25 indexed citations
2.
Kärkkäinen, Jorma, Kristiina Wähälä, Paula Kiuru, et al.. (2005). Potentially hallucinogenic 5‐hydroxytryptamine receptor ligands bufotenine and dimethyltryptamine in blood and tissues. Scandinavian Journal of Clinical and Laboratory Investigation. 65(3). 189–199. 41 indexed citations
3.
C.W., Ronald, Riitta Tähtelä, Eliisa Löyttyniemi, Jorma Kärkkäinen, & Matti Välimäki. (2001). A high prevalence of hypovitaminosis D in Finnish medical in‐ and outpatients. Journal of Internal Medicine. 249(6). 559–563. 60 indexed citations
4.
Mäkelä, Pirjo, Jorma Kärkkäinen, & Susanne Somersalo. (2000). Effect of Glycinebetaine on Chloroplast Ultrastructure, Chlorophyll and Protein Content, and RuBPCO Activities in Tomato Grown under Drought or Salinity. Biologia Plantarum. 43(3). 471–475. 150 indexed citations
5.
Alaranta, Hannu, et al.. (1998). Bone mineral status after pediatric spinal cord injury. Spinal Cord. 36(9). 641–646. 23 indexed citations
6.
Laine, Jarmo, et al.. (1995). The Nephropathy of Type I Tyrosinemia after Liver Transplantation. Pediatric Research. 37(5). 640–645. 27 indexed citations
7.
Kärkkäinen, Jorma, et al.. (1995). Urinary excretion of bufotenin (N,N-dimethyl-5-hydroxytryptamine) is increased in suspicious violent offenders: A confirmatory study. Psychiatry Research. 58(2). 145–152. 9 indexed citations
8.
Kärkkäinen, Jorma, E Vesterinen, Ulf‐Håkan Stenman, et al.. (1990). Comparison of mass spectrometry and radioimmunoassay to measure medroxyprogesterone acetate in patients with endometrial cancer. European Journal of Cancer and Clinical Oncology. 26(9). 975–977. 7 indexed citations
9.
Kärkkäinen, Jorma, et al.. (1988). Urinary excretion of free bufotenin by psychiatric patients. Biological Psychiatry. 24(4). 441–446. 12 indexed citations
10.
Jääskeläinen, Juha E., E. M. Laasonen, Jorma Kärkkäinen, Matti Haltia, & Henry Troupp. (1986). Hormone treatment of meningiomas: Lack of response to medroxyprogesterone acetate (MPA). Acta Neurochirurgica. 80(1-2). 35–41. 56 indexed citations
11.
Aitokallio‐Tallberg, Ansa, Jorma Kärkkäinen, P Pantzar, Torsten Wahlström, & Olavi Ylikorkala. (1985). Prostacyclin and thromboxane in breast cancer: Relationship between steroid receptor status and medroxyprogesterone acetate. British Journal of Cancer. 51(5). 671–674. 18 indexed citations
12.
Jansson, Sten‐Erik, Sirkka-Liisa Karonen, Veli-Matti Wasenius, et al.. (1985). Cytochemical demonstration of estrogen binding sites in breast cancer by estradiol covalently linked to horseradish peroxidase. European Journal of Cancer and Clinical Oncology. 21(5). 625–630. 2 indexed citations
13.
Immonen, Ilkka, et al.. (1983). Plasma renin substrate and oestrogens in normal pregnancy. Scandinavian Journal of Clinical and Laboratory Investigation. 43(1). 61–65. 13 indexed citations
14.
Laatikainen, Tiina, Dan Apter, Björn Andersson, et al.. (1983). Serum Steroids in Postmenopausal Women with Virilising Ovarian Tumours or Leydig Cell Hyperplasia. Journal of Obstetrics and Gynaecology. 3(3). 194–200. 1 indexed citations
15.
Kärkkäinen, Jorma, et al.. (1979). Mass fragmentographic quantification of urinary N,N-dimethyltryptamine and bufotenine. Journal of Chromatography B Biomedical Sciences and Applications. 162(4). 579–584. 32 indexed citations
16.
Nikkari, T., et al.. (1972). Unexpected occurrence of prolylhydroxyproline during the analysis of collagen-bound carbohydrates by gas-liquid chromatography. Journal of Chromatography A. 64(2). 211–218. 5 indexed citations
17.
Kärkkäinen, Jorma. (1970). Analysis of disaccharides as permethylated disaccharide alditols by gas—liquid chromatography—mass spectrometry. Carbohydrate Research. 14(1). 27–33. 96 indexed citations
18.
19.
Seppälä, Pentti, Aapo Lehtonen, Jorma Kärkkäinen, & V. Näntö. (1967). The presence of chondroitin sulphate in the synovial fluid in rheumatoid arthritis. Clinica Chimica Acta. 16(1). 115–119. 14 indexed citations
20.
Lehtonen, Aapo, Jorma Kärkkäinen, E. Haahti, et al.. (1966). Carbohydrate Components in the Epithelial Mucin of Hagfish, Myxine glutinosa.. Acta chemica Scandinavica/Acta chemica Scandinavica. B, Organic chemistry and biochemistry/Acta chemica Scandinavica. A, Physical and inorganic chemistry/Acta chemica Scandinavica. Series B. Organic chemistry and biochemistry/Acta chemica Scandinavica. Series A, Physical and inorganic chemistry. 20(6). 1456–1462. 19 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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