Alan R. Hemsley

1.8k total citations
54 papers, 1.5k citations indexed

About

Alan R. Hemsley is a scholar working on Ecology, Evolution, Behavior and Systematics, Molecular Biology and Paleontology. According to data from OpenAlex, Alan R. Hemsley has authored 54 papers receiving a total of 1.5k indexed citations (citations by other indexed papers that have themselves been cited), including 33 papers in Ecology, Evolution, Behavior and Systematics, 19 papers in Molecular Biology and 15 papers in Paleontology. Recurrent topics in Alan R. Hemsley's work include Plant Diversity and Evolution (25 papers), Fern and Epiphyte Biology (16 papers) and Paleontology and Stratigraphy of Fossils (14 papers). Alan R. Hemsley is often cited by papers focused on Plant Diversity and Evolution (25 papers), Fern and Epiphyte Biology (16 papers) and Paleontology and Stratigraphy of Fossils (14 papers). Alan R. Hemsley collaborates with scholars based in United Kingdom, Russia and France. Alan R. Hemsley's co-authors include Nina I. Gabarayeva, Margaret E. Collinson, Marie H. Kurmann, Andrew C. Scott, Peter C. Griffiths, William G. Chaloner, P. R. Bell, Imogen Poole, Valentina V. Grigorjeva and Patrick J. Barrie and has published in prestigious journals such as Nature, Philosophical Transactions of the Royal Society B Biological Sciences and Fuel.

In The Last Decade

Alan R. Hemsley

53 papers receiving 1.4k citations

Peers

Alan R. Hemsley

EEBS

PALEO

Valentin A. Krassilov Russia

David Winship Taylor United States

J. van der Burgh Netherlands

Lutz Kunzmann Germany

Philippe Gerrienne Belgium

Harlan P. Banks United States

Selena Y. Smith United States

Brigitte Meyer‐Berthaud France

Kathleen B. Pigg United States

Henry N. Andrews United States

Valentin A. Krassilov Russia

Alan R. Hemsley

1.3k ×1.4

EEBS

633 ×0.8

304 ×0.5

721 ×3.0

PALEO

237 ×1.5

Citations per year, relative to Alan R. Hemsley Alan R. Hemsley (= 1×) peers Valentin A. Krassilov

Countries citing papers authored by Alan R. Hemsley

Since Specialization

Citations

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

Fields of papers citing papers by Alan R. Hemsley

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Alan R. Hemsley. 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 Alan R. Hemsley. The network helps show where Alan R. Hemsley may publish in the future.

Co-authorship network of co-authors of Alan R. Hemsley

This figure shows the co-authorship network connecting the top 25 collaborators of Alan R. Hemsley. A scholar is included among the top collaborators of Alan R. Hemsley 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 Alan R. Hemsley. Alan R. Hemsley 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

Hemsley, Alan R., et al.. (2006). New insights from MALDI-ToF MS, NMR, and GC-MS: mass spectrometry techniques applied to palynology. PROTOPLASMA. 228(1-3). 151–157. 9 indexed citations

Gabarayeva, Nina I. & Alan R. Hemsley. (2006). Merging concepts: The role of self-assembly in the development of pollen wall structure. Review of Palaeobotany and Palynology. 138(2). 121–139. 71 indexed citations

Hemsley, Alan R., et al.. (2006). Micromorphology of outer exospore coatings inSelaginellamegaspores. Grana. 45(1). 9–21. 9 indexed citations

Hemsley, Alan R. & Nina I. Gabarayeva. (2006). Exine development: the importance of looking through a colloid chemistry ``window''. Plant Systematics and Evolution. 263(1-2). 25–49. 57 indexed citations

Hemsley, Alan R. & Imogen Poole. (2004). The Evolution of plant physiology : from whole plants to ecosystems. Elsevier eBooks. 53 indexed citations

Hemsley, Alan R., et al.. (2003). A model for the role of surfactants in the assembly of exine sculpture. Grana. 42(1). 38–42. 34 indexed citations

Hemsley, Alan R.. (2001). Comparison of in vitro decomposition of bryophytic and tracheophytic plant material. Botanical Journal of the Linnean Society. 137(4). 375–384. 19 indexed citations

Hemsley, Alan R.. (2001). Comparison of in vitro decomposition of bryophytic and tracheophytic plant material. Botanical Journal of the Linnean Society. 137(4). 375–384.

Hemsley, Alan R., et al.. (2000). Diversity of exine structure in Upper Carboniferous (Westphalian) selaginellalean megaspores. Review of Palaeobotany and Palynology. 109(1). 33–44. 18 indexed citations

10.

Li, Cheng‐Sen, Jason Hilton, & Alan R. Hemsley. (1997). Frasnian (Upper Devonian) evidence for multiple origins of seed-like structures. Botanical Journal of the Linnean Society. 123(2). 133–146. 15 indexed citations

11.

Hemsley, Alan R.. (1996). Studies of Fossil and Modern Spore Wall Biomacromolecules using13C Solid State NMR. Annals of Botany. 78(1). 83–94. 68 indexed citations

12.

Hemsley, Alan R., Patrick J. Barrie, & Andrew C. Scott. (1995). 13C solid-state n.m.r. spectroscopy of fossil sporopollenins. Variation in composition independent of diagenesis. Fuel. 74(7). 1009–1012. 21 indexed citations

13.

Hemsley, Alan R., Margaret E. Collinson, Warren L. Kovach, B. Vincent, & Trevor Williams. (1994). The role of self-assembly in biological systems: evidence from iridescent colloidal sporopollenin in Selaginella megaspore walls. Philosophical Transactions of the Royal Society B Biological Sciences. 345(1312). 163–173. 58 indexed citations

14.

Hemsley, Alan R.. (1993). A review of Palaeozoic seed-megaspores. Palaeontographica Abteilung B. 135–166. 19 indexed citations

15.

Hemsley, Alan R., Patrick J. Barrie, William G. Chaloner, & Andrew C. Scott. (1993). The Composition of Sporopollenin and its use in Living and Fossil Plant Systematics. Grana. 32(sup001). 2–11. 65 indexed citations

16.

Hemsley, Alan R.. (1992). Vascular pipe dreams. Nature. 357(6380). 641–642. 3 indexed citations

17.

Hemsley, Alan R.. (1992). Spores of the pteridophyta. Surface, wall structure, and diversity based on electron microscope studies. Palaeogeography Palaeoclimatology Palaeoecology. 95(3-4). 353–354. 17 indexed citations

18.

Hemsley, Alan R., William G. Chaloner, Andrew C. Scott, & Christopher J. Groombridge. (1992). Carbon-13 Solid-state Nuclear Magnetic Resonance of Sporopollenins from Modern and Fossil Plants. Annals of Botany. 69(6). 545–549. 45 indexed citations

19.

Hemsley, Alan R.. (1990). The ultrastructure of the exine of the megaspores in two palaeozoic seed-like structures. Review of Palaeobotany and Palynology. 63(1-2). 137–152. 14 indexed citations

20.

Hemsley, Alan R.. (1989). The Ultrastructure of the Spores of the Devonian Plant Parka decipiens. Annals of Botany. 64(3). 359–367. 12 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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