Keiichi Nagai

2.5k total citations
45 papers, 531 citations indexed

About

Keiichi Nagai is a scholar working on Molecular Biology, Spectroscopy and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Keiichi Nagai has authored 45 papers receiving a total of 531 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Molecular Biology, 10 papers in Spectroscopy and 6 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Keiichi Nagai's work include Spectroscopy and Laser Applications (8 papers), Genomics and Phylogenetic Studies (5 papers) and RNA and protein synthesis mechanisms (5 papers). Keiichi Nagai is often cited by papers focused on Spectroscopy and Laser Applications (8 papers), Genomics and Phylogenetic Studies (5 papers) and RNA and protein synthesis mechanisms (5 papers). Keiichi Nagai collaborates with scholars based in Japan, United States and Thailand. Keiichi Nagai's co-authors include Eizi Hirota, Chikashi Yamada, Yasuki Endo, Hideki Kambara, Mikio Katayama, Kazunori Okano, Akira Maèda, Kentarou Kawaguchi, Kunio Esumi and Zhengping Li and has published in prestigious journals such as Nature Biotechnology, Analytical Chemistry and Langmuir.

In The Last Decade

Keiichi Nagai

42 papers receiving 489 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Keiichi Nagai Japan 13 208 195 137 89 76 45 531
Thomas J. Buckley United States 14 161 0.8× 147 0.8× 122 0.9× 73 0.8× 112 1.5× 25 534
Yin‐Yu Lee Taiwan 14 188 0.9× 161 0.8× 113 0.8× 72 0.8× 17 0.2× 35 475
Brian B. Brady United States 12 122 0.6× 74 0.4× 77 0.6× 38 0.4× 84 1.1× 36 522
Hubert E. van den Bergh Switzerland 13 142 0.7× 123 0.6× 105 0.8× 172 1.9× 15 0.2× 18 514
Jonàs Sala Spain 11 249 1.2× 178 0.9× 127 0.9× 138 1.6× 20 0.3× 12 461
Li Yao China 16 254 1.2× 138 0.7× 208 1.5× 65 0.7× 34 0.4× 92 715
Laurent Thomas Germany 21 357 1.7× 273 1.4× 241 1.8× 105 1.2× 56 0.7× 61 1.0k
Seonkyung Lee United States 12 104 0.5× 144 0.7× 98 0.7× 202 2.3× 38 0.5× 52 545
Wing S. Nip Canada 17 262 1.3× 273 1.4× 284 2.1× 32 0.4× 12 0.2× 31 682
Jichun Shi China 14 222 1.1× 193 1.0× 310 2.3× 12 0.1× 30 0.4× 23 565

Countries citing papers authored by Keiichi Nagai

Since Specialization
Citations

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

Fields of papers citing papers by Keiichi Nagai

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keiichi Nagai

This figure shows the co-authorship network connecting the top 25 collaborators of Keiichi Nagai. A scholar is included among the top collaborators of Keiichi Nagai 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 Keiichi Nagai. Keiichi Nagai 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.
Nagai, Keiichi, Suvimol Charoensiddhi, Jiro Nakayama, et al.. (2025). Synbiotic-driven modulation of the gut microbiota and metabolic functions related to obesity: insights from a human gastrointestinal model. BMC Microbiology. 25(1). 250–250. 1 indexed citations
2.
Ueki, Yoshitaka, et al.. (2014). Oxygen influence on ultrasonic Doppler velocimetry of lead–lithium flow using titanium transducer. Fusion Engineering and Design. 89(1). 77–81. 3 indexed citations
3.
Sakurai, Keita, Takemori Yamawaki, Kenji Okita, et al.. (2011). Utility of the Fluid-Attenuated Inversion Recovery Sequence in Detecting a Hyperintense Putaminal Rim in Multiple System Atrophy-Parkinsonism: A Preliminary Study. European Neurology. 66(1). 42–46. 1 indexed citations
4.
Nagai, Keiichi & Toshihisa Takagi. (2007). Database Center for Life Science in Japan. Asia-Pacific Biotech News. 11(15). 1058–1060. 1 indexed citations
5.
Nagai, Keiichi, et al.. (2005). Effect of Alcohol Fuels on Fuel-Line Materials of Gasoline Vehicles. SAE technical papers on CD-ROM/SAE technical paper series. 1. 9 indexed citations
6.
Okano, Kazunori, Kyoko Kojima, Shinichi Ishida, et al.. (2004). Convenient Single-Nucleotide Polymorphism Typing from Whole Blood by Probe Extension and Bioluminescence Detection. Clinical Chemistry. 50(8). 1417–1420. 2 indexed citations
7.
Kimura, Kouichi, et al.. (2003). The Translated Region Inspector for cDNA Sequences. Proceedings Genome Informatics Workshop/Genome informatics. 14. 456–457. 2 indexed citations
8.
Nishikawa, Tetsuo, Kouichi Kimura, Tomohiro Yasuda, et al.. (2003). Characterization of One-Pass and Full-Length Sequences of Oligo-Capping cDNA Clones by Genome Mapping. Proceedings Genome Informatics Workshop/Genome informatics. 14. 458–459. 1 indexed citations
9.
Ikenoue, Tsuneo, Goichi Togo, Keiichi Nagai, et al.. (2001). Frameshift Mutations at Mononucleotide Repeats in RAD50 Recombinational DNA Repair Gene in Colorectal Cancers with Microsatellite Instability. Japanese Journal of Cancer Research. 92(6). 587–591. 24 indexed citations
10.
Masuho, Yasuhiko, Shinsaku Matsumoto, Takao Isogai, Keiichi Nagai, & Kenji NAGAHARI. (2001). The search for drug target molecules from genomics. British Journal of Urology. 88(s2). 11–17. 12 indexed citations
11.
Nagai, Keiichi. (2000). Trends of motor fuel quality in Japan. JSAE Review. 21(4). 457–462. 23 indexed citations
12.
Irie, Ryotaro, et al.. (1999). DNA sequence comparison considering both amino acid and nucleotide insertions/deletions because of evolution and experimental error. Journal of Biotechnology. 69(1). 19–26. 1 indexed citations
13.
Hiraoka, Susumu, et al.. (1997). Highly Sensitive Homology Search Methods on Parallel Computer. Proceedings Genome Informatics Workshop/Genome informatics. 8. 294–295.
14.
Irie, Ryotaro, et al.. (1997). Codon-Sensitive Comparison of DNA Sequences Containing Insertions/Deletions and Statistical Significance of the Similarity Scores. Proceedings Genome Informatics Workshop/Genome informatics. 8. 286–287. 1 indexed citations
15.
Nishikawa, Tetsuo, et al.. (1994). Rapid identity searching program for DNA sequences and its applications to cDNA grouping. Proceedings Genome Informatics Workshop/Genome informatics. 5. 194–195.
16.
Kambara, Hideki, et al.. (1992). Photodestruction of fluorophores and optimum conditions for trace DNA detection by automated DNA sequencer. Electrophoresis. 13(1). 542–546. 12 indexed citations
17.
Kambara, Hideki, et al.. (1991). Real Time Automated Simultaneous Double-Stranded DNA Sequencing Using Two-Color Fluorophore Labeling. Nature Biotechnology. 9(7). 648–651. 16 indexed citations
18.
Nagai, Keiichi, et al.. (1989). [One-stage resected case of dumbbell type tumor of the posterior mediastinum].. PubMed. 42(10). 831–4. 1 indexed citations
19.
Nagai, Keiichi & Mikio Katayama. (1980). Infrared Multiphoton Dissociation of C2F3Cl. Japanese Journal of Applied Physics. 19(7). 1235–1235. 6 indexed citations
20.
Nagai, Keiichi & Mikio Katayama. (1979). The Mechanism of the TEA CO2 Laser-induced Reaction of 1,1-Dichloroethane. Bulletin of the Chemical Society of Japan. 52(12). 3741–3742. 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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