Keiichi Ohta

1.1k total citations
52 papers, 890 citations indexed

About

Keiichi Ohta is a scholar working on Ecology, Atmospheric Science and Oceanography. According to data from OpenAlex, Keiichi Ohta has authored 52 papers receiving a total of 890 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Ecology, 11 papers in Atmospheric Science and 8 papers in Oceanography. Recurrent topics in Keiichi Ohta's work include Hydrocarbon exploration and reservoir analysis (5 papers), Geology and Paleoclimatology Research (5 papers) and Marine and coastal ecosystems (5 papers). Keiichi Ohta is often cited by papers focused on Hydrocarbon exploration and reservoir analysis (5 papers), Geology and Paleoclimatology Research (5 papers) and Marine and coastal ecosystems (5 papers). Keiichi Ohta collaborates with scholars based in Japan, Bangladesh and Taiwan. Keiichi Ohta's co-authors include Shafi M. Tareq, Noriyuki Тanaka, Hiroshi Sakugawa, Katsura Munakata, Kazuhiko Takeda, S. Yamaji, Makiko Takagi, Hiroyuki Kitagawa, Insaf S. Babiker and Z.M. Chen and has published in prestigious journals such as Geochimica et Cosmochimica Acta, The Science of The Total Environment and Chemosphere.

In The Last Decade

Keiichi Ohta

52 papers receiving 841 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 Ohta Japan 17 247 210 158 149 115 52 890
Hiroyuki Tsubota Japan 19 238 1.0× 251 1.2× 431 2.7× 262 1.8× 73 0.6× 62 1.2k
Daniel H. Stuermer United States 15 82 0.3× 162 0.8× 254 1.6× 92 0.6× 210 1.8× 22 1.1k
Buuan Lam Canada 10 154 0.6× 195 0.9× 181 1.1× 60 0.4× 133 1.2× 11 740
Tetsuo Uchida Japan 18 150 0.6× 300 1.4× 127 0.8× 170 1.1× 53 0.5× 75 1.1k
O. E. Trubetskaya Russia 20 133 0.5× 309 1.5× 349 2.2× 67 0.4× 84 0.7× 64 1.0k
Inka Dor Israel 18 106 0.4× 218 1.0× 214 1.4× 85 0.6× 61 0.5× 49 1.1k
Steven L. Manley United States 17 316 1.3× 213 1.0× 548 3.5× 255 1.7× 152 1.3× 23 970
Frank Laturnus Germany 20 247 1.0× 169 0.8× 310 2.0× 181 1.2× 303 2.6× 35 1.1k
Nobuhide Fujitake Japan 19 172 0.7× 469 2.2× 309 2.0× 164 1.1× 66 0.6× 95 1.2k
C. Calmon United States 10 83 0.3× 257 1.2× 248 1.6× 95 0.6× 154 1.3× 25 1.2k

Countries citing papers authored by Keiichi Ohta

Since Specialization
Citations

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

Fields of papers citing papers by Keiichi Ohta

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keiichi Ohta

This figure shows the co-authorship network connecting the top 25 collaborators of Keiichi Ohta. A scholar is included among the top collaborators of Keiichi Ohta 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 Ohta. Keiichi Ohta 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.
2.
Miyake, Takayuki, Fumio Nakazawa, Mika Kohno, et al.. (2005). Concentrations, deposition rates and source variations of n-alkanes in Sofiyskiy Glacier, Russian Altai Mountains. 22(22). 81–87. 4 indexed citations
3.
Tareq, Shafi M., Eiichiro Tanoue, Hiroyuki Tsuji, Noriyuki Тanaka, & Keiichi Ohta. (2005). Hydrocarbon and elemental carbon signatures in a tropical wetland: Biogeochemical evidence of forest fire and vegetation changes. Chemosphere. 59(11). 1655–1665. 42 indexed citations
4.
Tareq, Shafi M., Noriyuki Тanaka, & Keiichi Ohta. (2004). Biomarker signature in tropical wetland: lignin phenol vegetation index (LPVI) and its implications for reconstructing the paleoenvironment. The Science of The Total Environment. 324(1-3). 91–103. 104 indexed citations
5.
Babiker, Insaf S., et al.. (2004). The role of climate variability in the inter-annual variation of terrestrial net primary production (NPP). The Science of The Total Environment. 332(1-3). 123–137. 88 indexed citations
6.
Takeda, Kazuhiko, et al.. (2004). Determination of Hydroxyl Radical Photoproduction Rates in Natural Waters. Analytical Sciences. 20(1). 153–158. 122 indexed citations
7.
Katsumata, Hideyuki, Satoshi Kaneco, T. Suzuki, & Keiichi Ohta. (2004). Effect of Metal Nitrates on the Formation of PCDD/Fs During Newspaper Combustion. Bulletin of Environmental Contamination and Toxicology. 73(3). 479–86. 2 indexed citations
8.
Miyake, Hideto, Keiichi Ohta, Yasuhiro Shibata, et al.. (2003). High performance Schottky UV detectors (265–100 nm) using n-Al0.5Ga0.5N on AlN epitaxial layer. physica status solidi (a). 200(1). 151–154. 9 indexed citations
9.
Ohta, Keiichi, et al.. (1993). . Journal of the Japanese Society of Revegetation Technology. 19(4). 276–315. 1 indexed citations
10.
Venkatesan, M.I., Keiichi Ohta, Scott A. Stout, Spencer M. Steinberg, & J.L. Oudin. (1993). Diagenetic trends of lignin phenols in Mahakam Delta coals: correlation between laboratory thermal maturation and natural samples. Organic Geochemistry. 20(4). 463–473. 14 indexed citations
11.
Ohta, Keiichi, Susumu Itoh, & T. Mizuno. (1991). Electrothermal atomic-emission spectrometric determination of lithium with a metal-tube atomizer and a matrix modifier. Talanta. 38(3). 325–328. 13 indexed citations
12.
Ishii, Daisuke, et al.. (1988). Unified capillary chromatography. Journal of High Resolution Chromatography. 11(11). 800–801. 23 indexed citations
13.
Ohta, Keiichi & Nobuhiko Handa. (1985). Organic components in size-separated aerosols from the western North Pacific. Journal of Oceanography. 41(1). 25–32. 5 indexed citations
14.
Sakugawa, Hiroshi, Nobuhiko Handa, & Keiichi Ohta. (1985). Isolation and characterization of low molecular weight carbohydrates dissolved in seawater. Marine Chemistry. 17(4). 341–362. 15 indexed citations
15.
Ohta, Keiichi, Nobuhiko Handa, & Eiji Matsumoto. (1983). Trends and factors governing polycyclic aromatic hydrocarbon levels in Tokyo Bay sediments. Geochimica et Cosmochimica Acta. 47(9). 1651–1654. 21 indexed citations
16.
17.
Takagi, Makiko, Saburô Funahashi, Keiichi Ohta, & Toshio NAKABÁYASHI. (1980). Phyllospadine, a New Flavonoidal Alkaloid from the Sea-GrassPhyllosphadix iwatensis. Agricultural and Biological Chemistry. 44(12). 3019–3020. 8 indexed citations
18.
Takagi, Makiko, Saburô Funahashi, Keiichi Ohta, & Toshio NAKABÁYASHI. (1979). Flavonoids in the sea-grass, Phyllospadix japonica.. Agricultural and Biological Chemistry. 43(11). 2417–2418. 6 indexed citations
19.
Ohta, Keiichi & Makiko Takagi. (1977). Antimicrobial compounds of the marine red alga Marginisporum aberrans. Phytochemistry. 16(7). 1085–1086. 15 indexed citations
20.
Ohta, Keiichi, Yuh‐Lin Chen, Shingo Marumo, & Katsura Munakata. (1969). Studies on the Piscicidal Components of Justicia Hayatai var. decumbens. Agricultural and Biological Chemistry. 33(4). 610–614. 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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