Ryo Okumura

1.1k total citations
40 papers, 841 citations indexed

About

Ryo Okumura is a scholar working on Molecular Biology, Global and Planetary Change and Radiological and Ultrasound Technology. According to data from OpenAlex, Ryo Okumura has authored 40 papers receiving a total of 841 indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Molecular Biology, 12 papers in Global and Planetary Change and 8 papers in Radiological and Ultrasound Technology. Recurrent topics in Ryo Okumura's work include Radioactive contamination and transfer (11 papers), Radioactivity and Radon Measurements (8 papers) and Antibiotic Resistance in Bacteria (7 papers). Ryo Okumura is often cited by papers focused on Radioactive contamination and transfer (11 papers), Radioactivity and Radon Measurements (8 papers) and Antibiotic Resistance in Bacteria (7 papers). Ryo Okumura collaborates with scholars based in Japan, United States and Germany. Ryo Okumura's co-authors include Kazuki Hoshino, Olga Lomovskaya, Weimin Mao, Hiroko Ishida, Mark S. Warren, Anita R. Mistry, Koichi Takamiya, Angela Lee, M. Tanigaki and Hiroshi Tarui and has published in prestigious journals such as Journal of the American Chemical Society, Journal of Clinical Oncology and Journal of Bacteriology.

In The Last Decade

Ryo Okumura

39 papers receiving 818 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ryo Okumura Japan 15 309 246 228 145 108 40 841
Christine M. Johnson United States 11 198 0.6× 83 0.3× 30 0.1× 61 0.4× 24 0.2× 31 682
Jannatul Ferdous Bangladesh 14 232 0.8× 59 0.2× 70 0.3× 139 1.0× 41 0.4× 74 937
Qingxia Wang China 19 296 1.0× 19 0.1× 69 0.3× 5 0.0× 27 0.3× 67 1.1k
Kayzad Nilgiriwala India 9 278 0.9× 18 0.1× 68 0.3× 16 0.1× 3 0.0× 20 616
Masaatsu Koike Japan 12 182 0.6× 19 0.1× 140 0.6× 6 0.0× 80 0.7× 24 475
Kuniyoshi Masuda Japan 14 215 0.7× 27 0.1× 5 0.0× 39 0.3× 17 0.2× 37 500
Maud E. S. Achard Australia 16 249 0.8× 10 0.0× 211 0.9× 1 0.0× 36 0.3× 18 1.0k
Charles West United States 14 108 0.3× 33 0.1× 2 0.0× 94 0.6× 20 0.2× 59 1.4k
Bhakti Basu India 16 433 1.4× 13 0.1× 19 0.1× 5 0.0× 9 0.1× 38 677
Lichun Li China 19 207 0.7× 6 0.0× 45 0.2× 4 0.0× 122 1.1× 56 943

Countries citing papers authored by Ryo Okumura

Since Specialization
Citations

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

Fields of papers citing papers by Ryo Okumura

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ryo Okumura

This figure shows the co-authorship network connecting the top 25 collaborators of Ryo Okumura. A scholar is included among the top collaborators of Ryo Okumura 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 Ryo Okumura. Ryo Okumura 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.
Sasaki, Kengo, et al.. (2024). Construction of a versatile in vitro cultivation screening platform using human oral microbiota. Environmental Microbiology Reports. 16(2). e13243–e13243. 2 indexed citations
2.
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Ono, Yosuke, Ryo Okumura, Kanako C. Hatanaka, et al.. (2021). The first case of congenital syphilis diagnosed by 16S ribosome-RNA gene sequence analysis. Journal of Infection and Chemotherapy. 28(2). 295–298. 1 indexed citations
5.
Kobayashi, Intetsu, et al.. (2018). Gene expression analysis in the potent bactericidal activity of sitafloxacin against Streptococcus pneumoniae. Journal of Infection and Chemotherapy. 25(4). 322–324. 1 indexed citations
6.
Tsuda, Shuichi, M. Tanigaki, Tadayoshi Yoshida, Ryo Okumura, & Kimiaki Saitô. (2018). Dependence of dose rate measurement in the environment on crystal configuration of scintillation detectors. Transactions of the Atomic Energy Society of Japan. 17(1). 11–17. 3 indexed citations
7.
Hamasuna, Ryoichi, Makoto Ohnishi, Masahiro Matsumoto, et al.. (2017). In Vitro Activity of Sitafloxacin and Additional Newer Generation Fluoroquinolones Against Ciprofloxacin-Resistant Neisseria gonorrhoeae Isolates. Microbial Drug Resistance. 24(1). 30–34. 13 indexed citations
8.
Kim, Eu Suk, Chunhui Chen, Molly R. Braun, et al.. (2015). Interactions between QnrB, QnrB Mutants, and DNA Gyrase. Antimicrobial Agents and Chemotherapy. 59(9). 5413–5419. 15 indexed citations
9.
Miura, Tsutomu, Ryo Okumura, Shun Sekimoto, et al.. (2014). Precise determination of bromine in PP resin pellet by instrumental neutron activation analysis using internal standardization. Journal of Radioanalytical and Nuclear Chemistry. 303(2). 1417–1420. 7 indexed citations
10.
Kihira, Tameko, Sohei Yoshida, Ikuro WAKAYAMA, et al.. (2014). Neutron Activation Analysis of Scalp Hair from ALS Patients and Residents in the Kii Peninsula, Japan. Biological Trace Element Research. 164(1). 36–42. 9 indexed citations
11.
Shibahara, Yuji, Takumi Kubota, Toshiyuki Fujii, et al.. (2014). Analysis of cesium isotope compositions in environmental samples by thermal ionization mass spectrometry – 1. A preliminary study for source analysis of radioactive contamination in Fukushima prefecture. Journal of Nuclear Science and Technology. 51(5). 575–579. 47 indexed citations
12.
Tsuda, Shuichi, Tadayoshi Yoshida, Masaki Ando, et al.. (2013). Construction of a car-borne survey system for measurement of dose rates in air; KURAMA-II, and its application. 9 indexed citations
13.
Tanigaki, M., et al.. (2013). Development of a car-borne γ-ray survey system, KURAMA. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 726. 162–168. 41 indexed citations
14.
Okumura, Ryo, et al.. (2011). Quinolone Induction of qnrVS1 in Vibrio splendidus and Plasmid-Carried qnrS1 in Escherichia coli, a Mechanism Independent of the SOS System. Antimicrobial Agents and Chemotherapy. 55(12). 5942–5945. 19 indexed citations
15.
Hayashi, Tetsutaro, Norito Shibata, Ryo Okumura, et al.. (2010). Single‐cell gene profiling of planarian stem cells using fluorescent activated cell sorting and its “index sorting” function for stem cell research. Development Growth & Differentiation. 52(1). 131–144. 97 indexed citations
16.
Yamachika, Shinichiro, et al.. (2008). In vitro and in vivo antibacterial activity of sitafloxacin. 56. 1–17. 5 indexed citations
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Kitayama, Takashi, Shu Minagawa, Seiji Sawada, et al.. (2006). Synthesis of a novel inhibitor against MRSA and VRE: Preparation from zerumbone ring opening material showing histidine-kinase inhibition. Bioorganic & Medicinal Chemistry Letters. 17(4). 1098–1101. 21 indexed citations
19.
Hamada, Naoko, Ryo Okumura, Ritsuko Kodaira, et al.. (1999). Isolation and transcriptional analysis of a cellulase gene (cell) from the basidiomycete Irpex lacteus. Journal of Bioscience and Bioengineering. 87(1). 97–102. 14 indexed citations
20.
Okumura, Ryo, et al.. (1996). Doxorubicin-efflux pump inHaloferax voleaniiis energized by ATP. FEMS Microbiology Letters. 139(1). 83–88. 4 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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