Frederick J. Ryan

506 total citations
23 papers, 418 citations indexed

About

Frederick J. Ryan is a scholar working on Plant Science, Ecology, Evolution, Behavior and Systematics and Molecular Biology. According to data from OpenAlex, Frederick J. Ryan has authored 23 papers receiving a total of 418 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Plant Science, 8 papers in Ecology, Evolution, Behavior and Systematics and 6 papers in Molecular Biology. Recurrent topics in Frederick J. Ryan's work include Plant and animal studies (4 papers), Genetic diversity and population structure (3 papers) and Plant Pathogens and Fungal Diseases (3 papers). Frederick J. Ryan is often cited by papers focused on Plant and animal studies (4 papers), Genetic diversity and population structure (3 papers) and Plant Pathogens and Fungal Diseases (3 papers). Frederick J. Ryan collaborates with scholars based in United States, United Kingdom and Uzbekistan. Frederick J. Ryan's co-authors include Debra R. Ayres, N. E. Tolbert, David F. Spencer, Christian Paech, John F. Gaskin, Michael J. Pitcairn, Ildikó Schwarczinger, W. L. Bruckart, John P. Bailey and Eva Grotkopp and has published in prestigious journals such as Biochemical and Biophysical Research Communications, Molecular Ecology and Archives of Biochemistry and Biophysics.

In The Last Decade

Frederick J. Ryan

23 papers receiving 361 citations

Peers

Frederick J. Ryan

EEBS

GENET

Pedro Luís Pérez de Páz Spain

Neil O. Polans United States

P. Baradat France

J. K. Morton Canada

Ling‐Yun Chen China

Loran C. Anderson United States

Deana Pedersen United States

Suzette Clement United States

A. R. Bean Australia

Pedro Luís Pérez de Páz Spain

Frederick J. Ryan

444 ×2.1

258 ×1.6

EEBS

141 ×1.3

85 ×0.8

GENET

26 ×0.3

Citations per year, relative to Frederick J. Ryan Frederick J. Ryan (= 1×) peers Pedro Luís Pérez de Páz

Countries citing papers authored by Frederick J. Ryan

Since Specialization

Citations

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

Fields of papers citing papers by Frederick J. Ryan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Frederick J. Ryan

This figure shows the co-authorship network connecting the top 25 collaborators of Frederick J. Ryan. A scholar is included among the top collaborators of Frederick J. 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 Frederick J. Ryan. Frederick J. Ryan 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

Ryan, Frederick J., et al.. (2015). Effects of infestation by grape phylloxera on sugars, free amino acids, and starch of grapevine roots. Julius Kühn-Institut. 39(4). 175–176. 4 indexed citations

Gaskin, John F., et al.. (2006). GENOTYPE DIVERSITY OF SALSOLA TRAGUS AND POTENTIAL ORIGINS OF A PREVIOUSLY UNIDENTIFIED INVASIVE SALSOLA FROM CALIFORNIA AND ARIZONA. Madroño. 53(3). 244–251. 13 indexed citations

Sobhian, R., et al.. (2003). DNA phenotyping to find a natural enemy in Uzbekistan for California biotypes of Salsola tragus L.. Biological Control. 28(2). 222–228. 21 indexed citations

Bruckart, W. L., et al.. (2003). Differential susceptibility of Russian thistle accessions to Colletotrichum gloeosporioides. Biological Control. 30(2). 306–311. 23 indexed citations

Ryan, Frederick J., et al.. (2002). What's in a name? Diversity and origin of Russian thistle in California through DNA markers.. 51–56. 1 indexed citations

Spencer, David F., et al.. (2001). Soluble Sugar Concentrations Associated with Tuber and Winter Bud Sprouting. 4 indexed citations

Ryan, Frederick J., et al.. (2001). CHALLENGES IN DEVELOPING MOLECULAR MARKERS FOR ALMOND (Prunus amygdalus) AND GRAPE (Vitis species). Acta Horticulturae. 629–639. 3 indexed citations

Ryan, Frederick J. & Debra R. Ayres. (2000). Molecular markers indicate two cryptic, genetically divergent populations of Russian thistle (<i>Salsola</i> <i>tragus</i>) in California. Canadian Journal of Botany. 78(1). 59–67. 4 indexed citations

Ryan, Frederick J. & Debra R. Ayres. (2000). Molecular markers indicate two cryptic, genetically divergent populations of Russian thistle (Salsola tragus) in California. Canadian Journal of Botany. 78(1). 59–67. 31 indexed citations

10.

Ayres, Debra R. & Frederick J. Ryan. (1999). Genetic diversity and structure of the narrow endemic Wyethia reticulata and its congener W. bolanderi (Asteraceae) using RAPD and allozyme techniques. American Journal of Botany. 86(3). 344–353. 87 indexed citations

11.

Ryan, Frederick J., et al.. (1997). The clonal and population structure of a rare endemic plant, Wyethia reticulata (Asteraceae): allozyme and RAPD analysis. Molecular Ecology. 6(8). 761–772. 63 indexed citations

12.

Spencer, David F., et al.. (1997). Construction costs for some aquatic plants. Aquatic Botany. 56(3-4). 203–214. 24 indexed citations

13.

Ryan, Frederick J., et al.. (1995). Coexistence of Monoecious and Dioecious Hydrilla in Lake Gaston, North Carolina and Virginia. Journal of Aquatic Plant Management. 33. 8–12. 22 indexed citations

14.

Spencer, David F., W. van Vierssen, Frederick J. Ryan, & Gregory G. Ksander. (1993). Influence of Photoperiod and Plant Weight on Tuber Production byPotamogeton pectinatusL.. Journal of Freshwater Ecology. 8(1). 1–11. 7 indexed citations

15.

Ryan, Frederick J., et al.. (1991). Non-genetic origin of isoenzymic variability in subterranean turions of monoecious and dioecious hydrilla. Journal of Aquatic Plant Management. 29. 3–6. 7 indexed citations

16.

Ryan, Frederick J.. (1988). Partial characterization of a major family of proteins in turions of Hydrilla verticillata. Physiologia Plantarum. 73(4). 486–493. 3 indexed citations

17.

Paech, Christian, Frederick J. Ryan, & N. E. Tolbert. (1977). Essential primary amino groups of ribulose bisphosphate carboxylase/oxygenase indicated by reaction with pyridoxal 5′-phosphate. Archives of Biochemistry and Biophysics. 179(1). 279–288. 31 indexed citations

18.

Ryan, Frederick J., Robert Barker, & N. E. Tolbert. (1975). Inhibition of ribulose diphosphate carboxylase/oxygenase by xylitol 1,5-diphosphate. Biochemical and Biophysical Research Communications. 65(1). 39–46. 12 indexed citations

19.

Ryan, Frederick J. & N. E. Tolbert. (1975). Ribulose Diphosphate Carboxylase / Oxygenase. 5 indexed citations

20.

Ryan, Frederick J., et al.. (1974). Ribulose diphosphate oxygenase V. Presence in ribulose diphosphate carboxylase from Rhodospirillum rubrum. Biochemical and Biophysical Research Communications. 59(4). 1233–1241. 17 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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