Roy T. Sawyer

2.4k total citations · 1 hit paper
78 papers, 2.0k citations indexed

About

Roy T. Sawyer is a scholar working on Pharmacology, Genetics and Ecology. According to data from OpenAlex, Roy T. Sawyer has authored 78 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 62 papers in Pharmacology, 23 papers in Genetics and 17 papers in Ecology. Recurrent topics in Roy T. Sawyer's work include Leech Biology and Applications (61 papers), Venomous Animal Envenomation and Studies (19 papers) and Healthcare and Venom Research (11 papers). Roy T. Sawyer is often cited by papers focused on Leech Biology and Applications (61 papers), Venomous Animal Envenomation and Studies (19 papers) and Healthcare and Venom Research (11 papers). Roy T. Sawyer collaborates with scholars based in United Kingdom, United States and Switzerland. Roy T. Sawyer's co-authors include Joshua Elliott, Gunther S. Stent, David A. Weisblat, Roger Munro, Rowland M. Shelley, Robert B. Wallis, Tony Atkinson, John R. Barta, Svein B. Manum and Elizabeth R. Flynn and has published in prestigious journals such as Nature, Science and SHILAP Revista de lepidopterología.

In The Last Decade

Roy T. Sawyer

73 papers receiving 1.7k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Leech Biology and Behaviour

1987 458 citations Roy T. Sawyer et al. profile →

Peers

Countries citing papers authored by Roy T. Sawyer

Since Specialization

Citations

This map shows the geographic impact of Roy T. Sawyer'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 Roy T. Sawyer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Roy T. Sawyer more than expected).

Fields of papers citing papers by Roy T. Sawyer

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Roy T. Sawyer. 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 Roy T. Sawyer. The network helps show where Roy T. Sawyer may publish in the future.

Co-authorship network of co-authors of Roy T. Sawyer

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

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Biology, morphology and taxonomy of a snail-feeding leech from North Carolina, USA, provisionally identified as Helobdella lineata (Verrill, 1874) (Glossiphoniidae): First evidence for extra-oral digestion in the Hirudinea 2024 ·Zootaxa ·Roy T. Sawyer	0
2	Description and taxonomic analysis of a tuberculated turtle leech from the Outer Banks, North Carolina, USA, provisionally identified as Placobdella multilineata Moore, 1953 (Hirudinea: Glossiphoniidae) 2021 ·Zootaxa ·Roy T. Sawyer	1
3	Observations on the terrestrial leech Haemopis septagon Sawyer & Shelley, 1976 (Annelida: Hirudinea) from the Outer Banks, North Carolina, USA, with a revision of the species 2019 ·Zootaxa ·Roy T. Sawyer	2
4	Description of the Southern swamp leech Philobdella floridana (Verrill, 1874) (Annelida: Hirudinea) from the Outer Banks, North Carolina, USA, with a revision of the species 2019 ·Zootaxa ·Roy T. Sawyer	2
5	Amlodipine Reduces Inflammation despite Promoting Albuminuria in the Streptozotocin-Induced Diabetic Rat 2012 ·SHILAP Revista de lepidopterología ·Elizabeth R. Flynn, (unknown), Roy T. Sawyer, Jonathan Lee, Christine Teutsch, Katalin Kauser, Christine Maric‐Bilkan	10
6	Toward a taxonomic revision of the medicinal leech Hirudo medicinalis Linnaeus, 1758 (Hirudinea: Hirudinidae): re-description of Hirudo troctina Johnson, 1816 from North Africa 2002 ·Journal of Natural History ·(unknown), Roy T. Sawyer	25
7	Johann Friedrich Dieffenbach: successful use of leeches in plastic surgery in the 1820s 2000 ·British Journal of Plastic Surgery ·Roy T. Sawyer	7
8	The trade in medicinal leeches in the southern Indian Ocean in the nineteenth century 1999 ·Medical History ·Roy T. Sawyer	6
9	Reduction of plasma clot stability by a novel factor XIIIa inhibitor from the Giant Amazon Leech, Haementeria ghilianii 1997 ·Blood Coagulation & Fibrinolysis ·Robert B. Wallis, (unknown), Simon J. Finney, Roy T. Sawyer, George Macdonald Bennett, S.B. Ross-Murphy	6
10	The antithrombotic effects of calin, a platelet-adhesion inhibitor from the medicinal leech, in a hamster femoral vein platelet-rich mural thrombosis model 1993 ·Thrombosis and Haemostasis ·Jolán Hársfalvi, Hans Deckmyn, JM Stassen, (unknown), Roy T. Sawyer, Jozef Vermylen	1
11	Novel hirudin variants from the leech Hirudinaria manillensis 1993 ·European Journal of Biochemistry ·Emanuela Scacheri, Gianpaolo Nitti, Barbara Valsasina, Gaetano Orsini, Carlo Visco, (unknown), Roy T. Sawyer, Paolo Sarmientos	67
12	Biochemical Characterisation of A Pancreatic Elastase Inhibitor from the LeechHirudin Aria Manillensis 1993 ·Journal of enzyme inhibition ·(unknown), (unknown), Roy T. Sawyer, Tony Atkinson	17
13	Effects of Hementin on Fibrinogen Mediated Platelet Aggregation/Deaggregation in Vitro 1991 ·Platelets ·Roger Munro, (unknown), Roy T. Sawyer	8
14	Thrombolytics and Anticoagulants from Leeches 1991 ·Nature Biotechnology ·Roy T. Sawyer	23
15	Hementin Deaggregates Platelets Faster than it Detibrinogenates Platelet-rich Plasma 1991 ·Platelets ·Roger Munro, (unknown), Roy T. Sawyer	1
16	Isolation of thrombin inhibitor from the leech Hirudinaria manillensis 1991 ·Blood Coagulation & Fibrinolysis ·(unknown), Roy T. Sawyer, (unknown), Tony Atkinson	50
17	The biological function of Hementin in the proboscis of the leech Haementeria ghilianii 1991 ·Blood Coagulation & Fibrinolysis ·Roy T. Sawyer, (unknown), Roger Munro	17
18	Mechanism of action of triethyltin on identified leech neurons 1990 ·Toxicology Letters ·Michael Kyriakides, Roy T. Sawyer, (unknown), Michael G. Simpson	1
19	Heparin inhibits mammalian, but not leech, hyaluronidase 1989 ·Thrombosis Research ·(unknown), Roy T. Sawyer	8
20	A checklist and key to the marine and fresh water leeches annelida hirudinea of puerto rico and other caribbean islands 1980 ·Caribbean Journal of Science ·Roy T. Sawyer, (unknown)	3

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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