Külliki Varvas

458 total citations
13 papers, 372 citations indexed

About

Külliki Varvas is a scholar working on Pharmacology, Biotechnology and Molecular Biology. According to data from OpenAlex, Külliki Varvas has authored 13 papers receiving a total of 372 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Pharmacology, 9 papers in Biotechnology and 5 papers in Molecular Biology. Recurrent topics in Külliki Varvas's work include Marine Sponges and Natural Products (9 papers), Inflammatory mediators and NSAID effects (6 papers) and Steroid Chemistry and Biochemistry (5 papers). Külliki Varvas is often cited by papers focused on Marine Sponges and Natural Products (9 papers), Inflammatory mediators and NSAID effects (6 papers) and Steroid Chemistry and Biochemistry (5 papers). Külliki Varvas collaborates with scholars based in Estonia and United States. Külliki Varvas's co-authors include Nigulas Samel, Ivar Järving, Reet Koljak, Karin Valmsen, Alan Brash, Tõnis Pehk, William E. Boeglin, Reet Kurg, Ü Lille and Mart Ustav and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Journal of Biological Chemistry and European Journal of Biochemistry.

In The Last Decade

Külliki Varvas

13 papers receiving 368 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Külliki Varvas Estonia	12	153	133	113	64	60	13	372
Reet Koljak Estonia	9	171 1.1×	121 0.9×	115 1.0×	44 0.7×	65 1.1×	9	371
Karin Valmsen Estonia	8	89 0.6×	110 0.8×	141 1.2×	53 0.8×	98 1.6×	11	371
Gabriele M. König Germany	13	130 0.8×	109 0.8×	170 1.5×	38 0.6×	11 0.2×	13	623
Solange Peixinho Brazil	13	296 1.9×	131 1.0×	98 0.9×	44 0.7×	18 0.3×	23	467
Laura Núñez‐Pons Italy	18	308 2.0×	161 1.2×	122 1.1×	22 0.3×	14 0.2×	40	732
Gilles Barnathan France	12	150 1.0×	62 0.5×	91 0.8×	17 0.3×	28 0.5×	19	373
Roy K. Okuda United States	10	159 1.0×	70 0.5×	83 0.7×	12 0.2×	26 0.4×	12	394
Antonio Crispino Italy	19	468 3.1×	253 1.9×	127 1.1×	12 0.2×	54 0.9×	45	756
Martin Sjögren Sweden	15	252 1.6×	115 0.9×	247 2.2×	77 1.2×	5 0.1×	18	712
Guido Villani Italy	18	403 2.6×	245 1.8×	184 1.6×	13 0.2×	18 0.3×	35	850

Countries citing papers authored by Külliki Varvas

Since Specialization

Citations

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

Fields of papers citing papers by Külliki Varvas

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Külliki Varvas

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

All Works

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13 of 13 papers shown

Varvas, Külliki, et al.. (2014). Novel membrane-associated prostaglandin E synthase-2 from crustacean arthropods. Comparative Biochemistry and Physiology Part B Biochemistry and Molecular Biology. 174. 45–52. 13 indexed citations

Varvas, Külliki, et al.. (2012). Structural and catalytic insights into the algal prostaglandin H synthase reveal atypical features of the first non-animal cyclooxygenase. Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids. 1831(4). 863–871. 16 indexed citations

Varvas, Külliki, et al.. (2009). Direct evidence of the cyclooxygenase pathway of prostaglandin synthesis in arthropods: Genetic and biochemical characterization of two crustacean cyclooxygenases. Insect Biochemistry and Molecular Biology. 39(12). 851–860. 49 indexed citations

Valmsen, Karin, et al.. (2007). Identification of a functional allene oxide synthase-lipoxygenase fusion protein in the soft coral Gersemia fruticosa suggests the generality of this pathway in octocorals. Biochimica et Biophysica Acta (BBA) - General Subjects. 1780(2). 315–321. 22 indexed citations

Valmsen, Karin, William E. Boeglin, Ivar Järving, et al.. (2007). A Critical Role of Non-active Site Residues on Cyclooxygenase Helices 5 and 6 in the Control of Prostaglandin Stereochemistry at Carbon 15. Journal of Biological Chemistry. 282(38). 28157–28163. 3 indexed citations

Valmsen, Karin, William E. Boeglin, Ivar Järving, et al.. (2004). Structural and functional comparison of 15S‐ and 15R‐specific cyclooxygenases from the coral Plexaura homomalla. European Journal of Biochemistry. 271(17). 3533–3538. 23 indexed citations

Koljak, Reet, Ivar Järving, Reet Kurg, et al.. (2001). The Basis of Prostaglandin Synthesis in Coral. Journal of Biological Chemistry. 276(10). 7033–7040. 52 indexed citations

Valmsen, Karin, Ivar Järving, William E. Boeglin, et al.. (2001). The origin of 15 R -prostaglandins in the Caribbean coral Plexaura homomalla : Molecular cloning and expression of a novel cyclooxygenase. Proceedings of the National Academy of Sciences. 98(14). 7700–7705. 58 indexed citations

Varvas, Külliki, Ivar Järving, Reet Koljak, et al.. (1999). Evidence of a Cyclooxygenase-related Prostaglandin Synthesis in Coral. Journal of Biological Chemistry. 274(15). 9923–9929. 42 indexed citations

10.

Koljak, Reet, et al.. (1998). New cytotoxic sterols from the soft coral Gersemia fruticosa. Tetrahedron. 54(1-2). 179–186. 25 indexed citations

11.

Varvas, Külliki, Reet Koljak, Ivar Järving, Tõnis Pehk, & Nigulas Samel. (1994). Endoperoxide pathway in prostaglandin biosynthesis in the soft coral Gersemia fruticosa. Tetrahedron Letters. 35(44). 8267–8270. 21 indexed citations

12.

Varvas, Külliki, Ivar Järving, Reet Koljak, et al.. (1993). In vitro biosynthesis of prostaglandins in the White Sea soft coral Gersemia fruticosa: Formation of optically active PGD2, PGE2, PGF2α and 15-keto-PGF2α from arachidonic acid. Tetrahedron Letters. 34(22). 3643–3646. 19 indexed citations

13.

Koljak, Reet, Tõnis Pehk, Ivar Järving, et al.. (1993). New antiproliferative 9,11-secosterol from soft coral gersemia fruticosa. Tetrahedron Letters. 34(12). 1985–1986. 29 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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