J. M. Roper

1.3k total citations
27 papers, 1.1k citations indexed

About

J. M. Roper is a scholar working on Materials Chemistry, Molecular Biology and Plant Science. According to data from OpenAlex, J. M. Roper has authored 27 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Materials Chemistry, 8 papers in Molecular Biology and 6 papers in Plant Science. Recurrent topics in J. M. Roper's work include Porphyrin Metabolism and Disorders (5 papers), Photosynthetic Processes and Mechanisms (5 papers) and Luminescence Properties of Advanced Materials (5 papers). J. M. Roper is often cited by papers focused on Porphyrin Metabolism and Disorders (5 papers), Photosynthetic Processes and Mechanisms (5 papers) and Luminescence Properties of Advanced Materials (5 papers). J. M. Roper collaborates with scholars based in United States, United Kingdom and Germany. J. M. Roper's co-authors include Alison G. Smith, Bryan Bennett, Mark Whittaker, D. W. Cooke, K. J. McClellan, R. E. Muenchausen, Robert C. Sze, Kenneth J. McClellan, Davinder Singh and Johanna E. Cornah and has published in prestigious journals such as Physical Review Letters, Journal of Biological Chemistry and Physical review. B, Condensed matter.

In The Last Decade

J. M. Roper

27 papers receiving 1.0k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
J. M. Roper United States 18 424 313 291 174 170 27 1.1k
M. V. Kovalchuk Russia 17 537 1.3× 102 0.3× 252 0.9× 214 1.2× 12 0.1× 100 966
Tokihiro Ikeda Japan 17 168 0.4× 120 0.4× 165 0.6× 106 0.6× 61 0.4× 85 1.0k
Johannes Möller Germany 18 400 0.9× 261 0.8× 139 0.5× 38 0.2× 29 0.2× 53 909
N. Darowski Germany 13 244 0.6× 246 0.8× 30 0.1× 61 0.4× 19 0.1× 41 746
Fabian Westermeier Germany 15 418 1.0× 73 0.2× 137 0.5× 96 0.6× 7 0.0× 64 758
Agnès Duri France 15 457 1.1× 31 0.1× 130 0.4× 126 0.7× 14 0.1× 29 813
John P. Sutter United Kingdom 22 430 1.0× 108 0.3× 584 2.0× 399 2.3× 6 0.0× 86 1.3k
M. Hussein Egypt 15 166 0.4× 169 0.5× 23 0.1× 106 0.6× 194 1.1× 71 621
B. Capelle France 21 876 2.1× 264 0.8× 76 0.3× 57 0.3× 5 0.0× 104 1.3k
Vitaliy Mykhaylyk United Kingdom 16 521 1.2× 225 0.7× 168 0.6× 7 0.0× 19 0.1× 45 854

Countries citing papers authored by J. M. Roper

Since Specialization
Citations

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

Fields of papers citing papers by J. M. Roper

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of J. M. Roper

This figure shows the co-authorship network connecting the top 25 collaborators of J. M. Roper. A scholar is included among the top collaborators of J. M. Roper 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 J. M. Roper. J. M. Roper 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.
Dunsiger, S. R., et al.. (2012). First Order Metamagnetic Transition inHo2Ti2O7Observed by Vibrating Coil Magnetometry at Milli-Kelvin Temperatures. Physical Review Letters. 108(25). 257204–257204. 21 indexed citations
2.
Cornah, Johanna E., J. M. Roper, Davinder Singh, & Alison G. Smith. (2002). Measurement of ferrochelatase activity using a novel assay suggests that plastids are the major site of haem biosynthesis in both photosynthetic and non-photosynthetic cells of pea (Pisum sativum L.). Biochemical Journal. 362(2). 423–423. 56 indexed citations
3.
Cornah, Johanna E., J. M. Roper, Davinder Singh, & Alison G. Smith. (2002). Measurement of ferrochelatase activity using a novel assay suggests that plastids are the major site of haem biosynthesis in both photosynthetic and non-photosynthetic cells of pea (Pisum sativum L.). Biochemical Journal. 362(2). 423–432. 44 indexed citations
4.
McClellan, K. J., F. Chu, J. M. Roper, & Isamu Shindo. (2001). Room temperature single crystal elastic constants of boron carbide. Journal of Materials Science. 36(14). 3403–3407. 61 indexed citations
5.
Cooke, D. W., Bryan Bennett, K.J. McClellan, & J. M. Roper. (2001). X-ray-induced thermally stimulated luminescence of cerium-doped gadolinium oxyorthosilicate. Radiation Measurements. 33(4). 403–408. 11 indexed citations
6.
Roper, J. M., Evelyne Raux, Amanda A. Brindley, et al.. (2000). The Enigma of Cobalamin (Vitamin B12) Biosynthesis inPorphyromonas gingivalis. Journal of Biological Chemistry. 275(51). 40316–40323. 58 indexed citations
7.
Cooke, D. W., Kenneth J. McClellan, Bryan Bennett, et al.. (2000). Crystal growth and optical characterization of cerium-doped Lu1.8Y0.2SiO5. Journal of Applied Physics. 88(12). 7360–7362. 203 indexed citations
8.
Cooke, D. W., Bryan Bennett, K. J. McClellan, et al.. (2000). Electron-lattice coupling parameters and oscillator strengths of cerium-doped lutetium oxyorthosilicate. Physical review. B, Condensed matter. 61(18). 11973–11978. 52 indexed citations
9.
Cooke, D. W., Bryan Bennett, K. J. McClellan, J. M. Roper, & Mark Whittaker. (2000). Oscillator strengths, Huang–Rhys parameters, and vibrational quantum energies of cerium-doped gadolinium oxyorthosilicate. Journal of Applied Physics. 87(11). 7793–7797. 18 indexed citations
10.
Raux, Evelyne, Heidi Schubert, J. M. Roper, Keith S. Wilson, & Martin J. Warren. (1999). Vitamin B12: Insights into Biosynthesis's Mount Improbable. Bioorganic Chemistry. 27(2). 100–118. 38 indexed citations
11.
Cooke, D. W., Bryan Bennett, R. E. Muenchausen, et al.. (1999). Intrinsic trapping sites in rare-earth and yttrium oxyorthosilicates. Journal of Applied Physics. 86(9). 5308–5310. 48 indexed citations
12.
Jia, Q. X., Alp T. Findikoğlu, P. N. Arendt, et al.. (1998). Superconducting YBa2Cu3O7−x thin films on polycrystalline ferrite for magnetically tunable microwave components. Applied Physics Letters. 72(14). 1763–1765. 14 indexed citations
13.
Kwon, C., Y. Gim, Fan Yang, et al.. (1998). Effect of in-plane epitaxy on magnetotransport properties of (La0.5Sr0.5)CoO3 thin films. Applied Physics Letters. 73(5). 695–697. 17 indexed citations
14.
Chow, Keng-See, Davinder Singh, J. M. Roper, & Alison G. Smith. (1997). A Single Precursor Protein for Ferrochelatase-I fromArabidopsis Is Imported in Vitro into Both Chloroplasts and Mitochondria. Journal of Biological Chemistry. 272(44). 27565–27571. 83 indexed citations
15.
Roper, J. M. & Alison G. Smith. (1997). Molecular Localisation of Ferrochelatase in Higher Plant Chloroplasts. European Journal of Biochemistry. 246(1). 32–37. 31 indexed citations
16.
Roper, J. M., Saheer E. Gharbia, Haroun N. Shah, & Martin J. Warren. (1997). Tetrapyrrole biosynthesis in several haem-dependent anaerobic pathogens. Reviews in Medical Microbiology. 8. S18–S18. 1 indexed citations
17.
Wilkie, Susan E., J. M. Roper, Alison G. Smith, & Martin J. Warren. (1995). Isolation, characterisation and expression of a cDNA clone encoding plastid aspartate aminotransferase from Arabidopsis thaliana. Plant Molecular Biology. 27(6). 1227–1233. 30 indexed citations
18.
Roper, J. M., Anton Neubrand, & Peter Hess. (1988). Study of intracavity absorption and laser behavior for C2H4, C2H6, CH3F, CH3Cl, and CH4/N2 by photoacoustic resonance spectroscopy. Journal of Applied Physics. 64(6). 2838–2846. 4 indexed citations
19.
Karbach, A., J. M. Roper, & Peter Hess. (1984). Computer-controlled performance of photoacoustic resonance experiments. Review of Scientific Instruments. 55(6). 892–895. 12 indexed citations
20.
Roper, J. M. & Peter Hess. (1981). Detection of gas mixing processes by resonant photoacoustic spectroscopy. Applied Physics Letters. 39(12). 946–948. 3 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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