Ryuzo Koyama

499 total citations
35 papers, 417 citations indexed

About

Ryuzo Koyama is a scholar working on Materials Chemistry, Biomedical Engineering and Organic Chemistry. According to data from OpenAlex, Ryuzo Koyama has authored 35 papers receiving a total of 417 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Materials Chemistry, 12 papers in Biomedical Engineering and 10 papers in Organic Chemistry. Recurrent topics in Ryuzo Koyama's work include Material Dynamics and Properties (11 papers), Surfactants and Colloidal Systems (7 papers) and Electrostatics and Colloid Interactions (6 papers). Ryuzo Koyama is often cited by papers focused on Material Dynamics and Properties (11 papers), Surfactants and Colloidal Systems (7 papers) and Electrostatics and Colloid Interactions (6 papers). Ryuzo Koyama collaborates with scholars based in Japan, United States and France. Ryuzo Koyama's co-authors include A. Isihara, Atsuo Nishioka, Nobuo Yamada, Hiroshi Nagai and Roger Cerf and has published in prestigious journals such as The Journal of Chemical Physics, Macromolecules and Journal of Applied Crystallography.

In The Last Decade

Ryuzo Koyama

33 papers receiving 398 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ryuzo Koyama Japan 9 198 158 146 95 87 35 417
L. Leibler France 9 349 1.8× 165 1.0× 191 1.3× 60 0.6× 170 2.0× 13 610
D. Dolar Slovenia 12 119 0.6× 307 1.9× 148 1.0× 51 0.5× 118 1.4× 34 436
J.D.G. McAdam United Kingdom 10 117 0.6× 51 0.3× 136 0.9× 99 1.0× 70 0.8× 12 342
Jean Dayantis France 10 80 0.4× 94 0.6× 176 1.2× 65 0.7× 64 0.7× 40 345
M. Buzier France 8 127 0.6× 49 0.3× 161 1.1× 67 0.7× 55 0.6× 9 371
Dietmar Ehlich 6 274 1.4× 45 0.3× 79 0.5× 115 1.2× 54 0.6× 6 407
G. Hild France 13 256 1.3× 86 0.5× 399 2.7× 151 1.6× 111 1.3× 18 809
Jan Erik Loefroth 8 99 0.5× 113 0.7× 193 1.3× 47 0.5× 65 0.7× 8 425
Paul Winsor United States 10 159 0.8× 77 0.5× 53 0.4× 85 0.9× 138 1.6× 15 429
Masaaki Fukatsu Japan 6 122 0.6× 62 0.4× 161 1.1× 143 1.5× 80 0.9× 7 406

Countries citing papers authored by Ryuzo Koyama

Since Specialization
Citations

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

Fields of papers citing papers by Ryuzo Koyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ryuzo Koyama. 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 Ryuzo Koyama. The network helps show where Ryuzo Koyama may publish in the future.

Co-authorship network of co-authors of Ryuzo Koyama

This figure shows the co-authorship network connecting the top 25 collaborators of Ryuzo Koyama. A scholar is included among the top collaborators of Ryuzo Koyama 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 Ryuzo Koyama. Ryuzo Koyama 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.
Koyama, Ryuzo. (1992). Electrostatic Persistence Length of Wormlike Polyelectrolyte. Journal of the Physical Society of Japan. 61(6). 1899–1902.
2.
Koyama, Ryuzo. (1991). Persistence Length of Wormlike Polyelectrolyte Molecules. Journal of the Physical Society of Japan. 60(11). 3717–3724. 2 indexed citations
3.
Koyama, Ryuzo. (1990). Persistence Length of Wormlike Polyelectrolyte Molecules. Journal of the Physical Society of Japan. 59(6). 2014–2019. 3 indexed citations
4.
Koyama, Ryuzo. (1984). Small-angle scattering of polyelectrolyte solutions. Macromolecules. 17(8). 1594–1598. 30 indexed citations
5.
Koyama, Ryuzo. (1983). Small-angle neutron scattering of polymer solutions. Physica B+C. 120(1-3). 418–421. 6 indexed citations
6.
Koyama, Ryuzo. (1980). Radial distribution function of random coil polymers. The Journal of Chemical Physics. 72(1). 247–252. 5 indexed citations
7.
Koyama, Ryuzo. (1980). X‐ray and neutron small‐angle scattering of random coil polymer solutions. Die Makromolekulare Chemie. 181(9). 1987–1998. 4 indexed citations
8.
Koyama, Ryuzo. (1976). Light Scattering of Stiff Chain Polymers. Journal of the Physical Society of Japan. 41(3). 1077–1078. 3 indexed citations
9.
Koyama, Ryuzo. (1974). Light Scattering of Stiff Chain Polymers. II. Journal of the Physical Society of Japan. 36(5). 1409–1417. 7 indexed citations
10.
Koyama, Ryuzo. (1970). Excluded Volume Effect of Chain Polymers. Journal of the Physical Society of Japan. 29(4). 1006–1011. 3 indexed citations
11.
Koyama, Ryuzo. (1969). Excluded Volume Effect and Light Scattering of Chain Polymers. Journal of the Physical Society of Japan. 27(5). 1319–1324. 5 indexed citations
12.
Koyama, Ryuzo. (1968). Excluded Volume Effect on the Intrinsic Viscosity of Chain Polymers. Journal of the Physical Society of Japan. 24(3). 580–588. 27 indexed citations
13.
Koyama, Ryuzo. (1964). Shear Rate Dependeuce of Flow Birefringence of Polymer Solutions. Journal of the Physical Society of Japan. 19(9). 1709–1717. 6 indexed citations
14.
Koyama, Ryuzo & Roger Cerf. (1960). Correctif à un article sur la mécanique statistique des macromolécules en chaînes dans un champ de vitesses. Journal de Physique. 21(5). 503–504. 1 indexed citations
15.
Koyama, Ryuzo. (1959). The second virial coefficient of polymer solutions. Journal of Polymer Science. 35(128). 247–258. 9 indexed citations
16.
Koyama, Ryuzo. (1958). Effect of Velocity Gradient on the Radial Distribution of Polymer Molecules in Dilute Solution. Journal of the Physical Society of Japan. 13(10). 1167–1173. 1 indexed citations
17.
Koyama, Ryuzo. (1957). Theory of Dilute Polymer Solutions. The Journal of Chemical Physics. 27(1). 234–239. 16 indexed citations
18.
Koyama, Ryuzo, et al.. (1956). Viscosity Measurement by the Rotating Cylinder Method. Journal of the Ceramic Association Japan. 64(732). 263–270. 1 indexed citations
19.
Isihara, A. & Ryuzo Koyama. (1956). Theory of Dilute High-Polymer Solutions (the Pearl Necklace Model). The Journal of Chemical Physics. 25(4). 712–716. 53 indexed citations
20.
Nishioka, Atsuo & Ryuzo Koyama. (1956). Apparent molecular weight of polytrifluorochloroethylene. Journal of Polymer Science. 19(91). 207–210. 1 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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