James P. Ryan

2.0k total citations
78 papers, 1.6k citations indexed

About

James P. Ryan is a scholar working on Molecular Biology, Cellular and Molecular Neuroscience and Gastroenterology. According to data from OpenAlex, James P. Ryan has authored 78 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 30 papers in Molecular Biology, 16 papers in Cellular and Molecular Neuroscience and 11 papers in Gastroenterology. Recurrent topics in James P. Ryan's work include Neuropeptides and Animal Physiology (13 papers), Gastrointestinal motility and disorders (8 papers) and Ion channel regulation and function (7 papers). James P. Ryan is often cited by papers focused on Neuropeptides and Animal Physiology (13 papers), Gastrointestinal motility and disorders (8 papers) and Ion channel regulation and function (7 papers). James P. Ryan collaborates with scholars based in United States, Ireland and United Kingdom. James P. Ryan's co-authors include Henry P. Parkman, H. N. Wagner, B.A. Rhodes, Y. Sasaki, Joan P. Schwartz, George R. Uhl, Elaine O’Reilly, John S. Martin, Sidney Cohen and Dennis L. Decktor and has published in prestigious journals such as Journal of the American Chemical Society, Angewandte Chemie International Edition and Gastroenterology.

In The Last Decade

James P. Ryan

78 papers receiving 1.5k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
James P. Ryan United States 25 422 306 299 267 242 78 1.6k
J H Wyllie United Kingdom 21 544 1.3× 505 1.7× 346 1.2× 302 1.1× 384 1.6× 61 2.3k
W. Krömer Germany 21 611 1.4× 342 1.1× 481 1.6× 385 1.4× 209 0.9× 72 1.4k
Pierre Rivière France 31 731 1.7× 265 0.9× 695 2.3× 263 1.0× 556 2.3× 76 2.1k
W. Rummel Germany 31 1.3k 3.0× 360 1.2× 438 1.5× 365 1.4× 384 1.6× 202 3.3k
Mats Eriksson Sweden 25 661 1.6× 354 1.2× 185 0.6× 81 0.3× 292 1.2× 132 2.3k
C. Adrian M. Hogben United States 21 613 1.5× 335 1.1× 158 0.5× 212 0.8× 275 1.1× 44 2.4k
Hitoshi Tada Japan 24 238 0.6× 234 0.8× 115 0.4× 172 0.6× 98 0.4× 96 1.9k
Eckhard Weber Germany 19 550 1.3× 257 0.8× 93 0.3× 221 0.8× 224 0.9× 40 1.6k
Akira Karasawa Japan 25 857 2.0× 146 0.5× 251 0.8× 110 0.4× 411 1.7× 185 2.7k
Akio Ishii Japan 28 725 1.7× 205 0.7× 227 0.8× 105 0.4× 703 2.9× 164 2.5k

Countries citing papers authored by James P. Ryan

Since Specialization
Citations

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

Fields of papers citing papers by James P. Ryan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by James P. Ryan. 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 James P. Ryan. The network helps show where James P. Ryan may publish in the future.

Co-authorship network of co-authors of James P. Ryan

This figure shows the co-authorship network connecting the top 25 collaborators of James P. Ryan. A scholar is included among the top collaborators of James P. Ryan 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 James P. Ryan. James P. Ryan 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.
Ryan, James P., Xingxing Xu, Nadia Elghobashi‐Meinhardt, et al.. (2025). Transaminase‐Triggered Cascades for the Synthesis and Dynamic Kinetic Resolution of Chiral N‐Heterocycles. Angewandte Chemie International Edition. 64(21). e202422584–e202422584. 2 indexed citations
2.
Chappell, Ben, D. Michael Gill, Nathan J. Patmore, et al.. (2016). An iron-catalysed C–C bond-forming spirocyclization cascade providing sustainable access to new 3D heterocyclic frameworks. Nature Chemistry. 9(4). 396–401. 46 indexed citations
3.
4.
Ryan, James P., et al.. (2006). Structural Insights into the Cryptic DNA-dependent ATPase Activity of UvrB. Journal of Molecular Biology. 357(1). 62–72. 25 indexed citations
5.
Ryan, James P., et al.. (2005). Effects of the selective serotonin reuptake inhibitor, fluoxetine, on regional gastric contractility1. Neurogastroenterology & Motility. 17(1). 76–82. 22 indexed citations
6.
Irwin, Jane A., James P. Ryan, Sandra M. O’Neill, et al.. (2004). Glycosidase activity in the excretory-secretory products of the liver fluke, Fasciola hepatica. Parasitology. 129(4). 465–472. 26 indexed citations
7.
Ryan, James P., et al.. (2004). Regional gastric contractility alterations in a diabetic gastroparesis mouse model: effects of cholinergic and serotoninergic stimulation. American Journal of Physiology-Gastrointestinal and Liver Physiology. 287(3). G612–G619. 37 indexed citations
8.
Parkman, Henry P., et al.. (2001). Myosin Light Chain Phosphorylation Correlates with Contractile Force in Guinea Pig Gallbladder Muscle. Digestive Diseases and Sciences. 46(1). 176–181. 8 indexed citations
9.
Parkman, Henry P., et al.. (2000). Effect of Acalculous Cholecystitis on Gallbladder Neuromuscular Transmission and Contractility. Journal of Surgical Research. 88(2). 186–192. 21 indexed citations
10.
Parkman, Henry P., et al.. (1998). Ranitidine and Nizatidine Stimulate Antral Smooth Muscle Contractility via Excitatory Cholinergic Mechanisms. Digestive Diseases and Sciences. 43(3). 497–505. 22 indexed citations
11.
Parkman, Henry P., et al.. (1997). Electric Field Stimulation-Induced Guinea Pig Gallbladder Contractions (Role of Calcium Channels in Acetylcholine Release). Digestive Diseases and Sciences. 42(9). 1919–1925. 17 indexed citations
12.
Dempsey, Daniel T., et al.. (1997). Acute Experimental Distal Colitis Alters Colonic Transit in Rats. Journal of Surgical Research. 69(1). 107–112. 26 indexed citations
13.
Martin, John H., et al.. (1994). Response of Colonic Smooth Muscle from Newborn and Adult Rabbits to Electrical Field Stimulation. Pediatric Research. 35(4). 470–473. 16 indexed citations
14.
Ryan, James P. & Michael A. Johnson. (1992). Radar performance prediction for target detection at sea. 13–17. 1 indexed citations
15.
Lev, A. A., James P. Ryan, Stuart M. Phillips, et al.. (1992). Rabbit Trachealis Tension Responses to Receptor-mediated Agonists are Diminished by Elastase. American Journal of Respiratory Cell and Molecular Biology. 6(5). 498–503. 4 indexed citations
16.
Gray, William R. & James P. Ryan. (1990). The effect of yeast culture on ruminal fermentation of silage, hay and straw in sheep.. 43(2). 50–55. 3 indexed citations
17.
Ryan, James P., et al.. (1990). Response to Calcium of Skinned Gallbladder Smooth Muscle from Newborn and Adult Guinea Pigs. Pediatric Research. 28(4). 336–338. 4 indexed citations
18.
Davis, Robert H., L McGowan, & James P. Ryan. (1972). Running activity of ovarian tumorigenic mice. Cellular and Molecular Life Sciences. 28(1). 93–94. 5 indexed citations
19.
Ryan, James P., et al.. (1971). The effect of diffusible acids on potassium ion uptake by yeast. Biochemical Journal. 125(4). 1081–1085. 21 indexed citations
20.
McGowan, Linda, et al.. (1970). Hair Loss in Ovarian Tumorigenic Mice. Experimental Biology and Medicine. 134(2). 434–436. 2 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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