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Una S. Ryan

D-Index & Metrics

Biology and Biochemistry

D-Index
51
Citations
8366
World Ranking
17266
National Ranking
7102

Una S. Ryan publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Una S. Ryan sits on this spectrum.

47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 414 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 849 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 950 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 841 scientists 207–216 publications: 735 scientists 217–226 publications: 709 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 418 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 197 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 60 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientists 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientists 1,028+ publications: 100 scientists
47 publications 1,028+

This scientist: 183 publications — 42nd percentile

42% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,028 publications or more.

Una S. Ryan D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Una S. Ryan sits on this spectrum.

40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 317 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 900 scientists 52–53 D-Index: 1,026 scientists 54–55 D-Index: 1,150 scientists 56–57 D-Index: 1,236 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,163 scientists 62–63 D-Index: 1,131 scientists 64–65 D-Index: 1,032 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 715 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 72 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40 D-Index 167+

This scientist: 51 D-Index — 14th percentile

14% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

Overview

Una S. Ryan is affiliated with Cambridge in America in the United States and has contributed extensively to research in medicine, immunology, and microbiology with a primary focus on parasitology and infectious diseases.

Their research fields include:

  • Medicine
  • Immunology and Microbiology

Within these fields, their subfields of study comprise:

  • Parasitology
  • Infectious Diseases
  • Epidemiology
  • Small Animals
  • Insect Science

Una S. Ryan has addressed a variety of scientific topics, notably:

  • Parasitic Infections and Diagnostics
  • Amoebic Infections and Treatments
  • Viral gastroenteritis research and epidemiology
  • Vector-borne infectious diseases
  • Coccidia and coccidiosis research
  • Dermatological diseases and infestations
  • Insect symbiosis and bacterial influences

The scientist has published in several journals, with frequent publication venues including:

  • Parasitology Research
  • Current Research in Parasitology and Vector-Borne Diseases
  • International Journal for Parasitology
  • Trends in Parasitology
  • Infection Genetics and Evolution

Recent notable papers authored or coauthored by Una S. Ryan are:

  • Taxonomy and molecular epidemiology of Cryptosporidium and Giardia - a 50 year perspective (1971-2021), 2021, International Journal for Parasitology
  • An Update on Zoonotic Cryptosporidium Species and Genotypes in Humans, 2021, Animals
  • Cryptosporidium - An update with an emphasis on foodborne and waterborne transmission, 2020, Research in Veterinary Science
  • Zoonotic giardiasis: an update, 2021, Parasitology Research
  • Wastewater-based epidemiology-surveillance and early detection of waterborne pathogens with a focus on SARS-CoV-2, Cryptosporidium and Giardia, 2021, Parasitology Research

Una S. Ryan collaborates frequently with multiple researchers in their field. Regular coauthors include:

  • Lihua Xiao
  • Yaoyu Feng
  • Siobhon Egan
  • Alireza Zahedi
  • Charlotte L. Oskam

Best Publications

  • Localization of angiotensin converting enzyme (kininase II). II. Immunocytochemistry and immunofluorescence

    Una S. Ryan;J.W. Ryan;C. Whitaker;A. Chiu

  • Isolation and culture of pulmonary artery endothelial cells.

    Una S. Ryan;E. Clements;D. Habliston;James W. Ryan

  • Inhibition of neointimal hyperplasia by blocking αvβ3 integrin with a small peptide antagonist GpenGRGDSPCA

    Eric T. Choi;Leslie Engel;Allan D. Callow;Shaping Sun

  • cDNA cloning, sequence analysis and tissue distribution of rat preproendothelin-1 mRNA

    Takeshi Sakurai;Masashi Yanagisawa;Akihiro Inoue;Una S. Ryan

  • Mediator‐induced activation of xanthine oxidase in endothelial cells

    Hans P. Friedl;Gerd O. Till;Una S. Ryan;Peter A. Ward

  • Methods for microcarrier culture of bovine pulmonary artery endothelial cells avoiding the use of enzymes

    Una S. Ryan;Marianne Mortara;Cecil Whitaker

  • Calcium entry through receptor-operated channels in bovine pulmonary artery endothelial cells.

    A. Johns;T.W. Lategan;N.J. Lodge;Una S. Ryan

  • High-level recombinant gene expression in rabbit endothelial cells transduced by retroviral vectors

    JA Zwiebel;SM Freeman;PW Kantoff;K Cornetta

  • Regulation of xanthine dehydrogenase and xanthine oxidase activity and gene expression in cultured rat pulmonary endothelial cells.

    Gregory P. Dupont;Thomas P. Huecksteadt;Bruce C. Marshall;Una S. Ryan

  • The safety and immunogenicity of a CETP vaccine in healthy adults

    Michael H. Davidson;Kevin Maki;Denise Umporowicz;Alistair Wheeler

  • Bradykinin-induced release of prostacyclin and thromboxanes from bovine pulmonary artery endothelial cells. Studies with lower homologs and calcium antagonists.

    David J. Crutchley;James W. Ryan;Una S. Ryan;George H. Fisher

  • Fc and C3b receptors on pulmonary endothelial cells: induction by injury.

    Una S. Ryan;Duane R. Schultz;James W. Ryan

  • New substrates for the radioassay of angiotensin converting enzyme of endothelial cells in culture.

    James W. Ryan;Alfred Chung;Larry C. Martin;Una S. Ryan

  • Alveolar type II cells: studies on the mode of release of lamellar bodies.

    Una S. Ryan;J.W. Ryan;D.S. Smith

  • Elastin production by cultured calf pulmonary artery endothelial cells.

    Robert P. Mecham;Judy Madaras;John A. McDonald;Una Ryan

  • Endothelial Targeting and Enhanced Antiinflammatory Effects of Complement Inhibitors Possessing Sialyl Lewisx Moieties

    Michael S. Mulligan;Roscoe L. Warner;Charles W. Rittershaus;Lawrence J. Thomas

  • Guanine nucleotide-dependent, pertussis toxin-insensitive regulation of phosphoinositide turnover by bradykinin in bovine pulmonary artery endothelial cells.

    T A Voyno-Yasenetskaya;V A Tkachuk;E G Cheknyova;M P Panchenko

  • Isolation and culture of pulmonary endothelial cells.

    Una S. Ryan

  • Regulation of manganese superoxide dismutase: IL-1 and TNF induction in pulmonary artery and microvascular endothelial cells

    Gary A.Visner;Sarah E. Chesrown;Joan Monnier;Una S. Ryan

  • Growth of endothelial and HeLa cells on a new multipurpose microcarrier that is positive, negative or collagen coated.

    Bruce S. Jacobson;Una S. Ryan

Frequent Co-Authors

John D. Catravas
John D. Catravas Old Dominion University
Peter A. Ward
Peter A. Ward University of Michigan–Ann Arbor
David J. Adams
David J. Adams Wellcome Sanger Institute
Masashi Yanagisawa
Masashi Yanagisawa University of Tsukuba
W. French Anderson
W. French Anderson University of Southern California
Tomoh Masaki
Tomoh Masaki Kyoto University
Neil Kaplowitz
Neil Kaplowitz University of Southern California
James Varani
James Varani University of Michigan–Ann Arbor
Katsutoshi Goto
Katsutoshi Goto University of Tsukuba
Takeshi Sakurai
Takeshi Sakurai University of Tsukuba

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