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Toshiki Koga

Observed names: KOGA, Toshiki, Koga, Toshiki
ORCID: 0000-0001-5728-0590
Observed ORCID: 0000-0001-5728-0590
OpenAlex ID: A5004181195
Soluble organic molecules in samples of the carbonaceous asteroid (162173) Ryugu
2023 · Hiroshi Naraoka, Yoshinori Takano, et al. · Science · 265
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Abundant ammonia and nitrogen-rich soluble organic matter in samples from asteroid (101955) Bennu
2025 · Daniel P. Glavin, Jason P. Dworkin, et al. · Nature Astronomy · 224
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Identifying the wide diversity of extraterrestrial purine and pyrimidine nucleobases in carbonaceous meteorites
2022 · Yasuhiro Oba, Yoshinori Takano, et al. · Nature Communications · 194
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A new family of extraterrestrial amino acids in the Murchison meteorite
2017 · Toshiki Koga, Hiroshi Naraoka · Scientific Reports · 179
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Uracil in the carbonaceous asteroid (162173) Ryugu
2023 · Yasuhiro Oba, Toshiki Koga, et al. · Nature Communications · 117
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Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium
2023 · Sarah S. Zeichner, José C. Aponte, et al. · Science · 81
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Chemical evolution of primordial salts and organic sulfur molecules in the asteroid 162173 Ryugu
2023 · Toshihiro Yoshimura, Yoshinori Takano, et al. · Nature Communications · 59
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Bio-essential sugars in samples from asteroid Bennu
2025 · Yoshihiro Furukawa, Sako Sunami, et al. · Nature Geoscience · 45
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Primordial aqueous alteration recorded in water-soluble organic molecules from the carbonaceous asteroid (162173) Ryugu
2024 · Yoshinori Takano, Hiroshi Naraoka, et al. · Nature Communications · 34
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Soluble organic matter Molecular atlas of Ryugu reveals cold hydrothermalism on C-type asteroid parent body
2023 · Philippe Schmitt-Kopplin, Norbert Hertkorn, et al. · Nature Communications · 30
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Synthesis of Amino Acids from Aldehydes and Ammonia: Implications for Organic Reactions in Carbonaceous Chondrite Parent Bodies
2022 · Toshiki Koga, Hiroshi Naraoka · ACS Earth and Space Chemistry · 28
Abundant extraterrestrial purine nucleobases in the Murchison meteorite: Implications for a unified mechanism for purine synthesis in carbonaceous chondrite parent bodies
2023 · Toshiki Koga, Yoshinori Takano, et al. · Geochimica et Cosmochimica Acta · 22
The spatial distribution of soluble organic matter and their relationship to minerals in the asteroid (162173) Ryugu
2023 · Minako Hashiguchi, Dan Aoki, et al. · Earth Planets and Space · 22
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Investigating the impact of x‐ray computed tomography imaging on soluble organic matter in the Murchison meteorite: Implications for Bennu sample analyses
2023 · Daniel P. Glavin, Scott A. Eckley, et al. · Meteoritics and Planetary Science · 19
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A complete set of canonical nucleobases in the carbonaceous asteroid (162173) Ryugu
2026 · Toshiki Koga, Yasuhiro Oba, et al. · Nature Astronomy · 17
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Breunnerite grain and magnesium isotope chemistry reveal cation partitioning during aqueous alteration of asteroid Ryugu
2024 · Toshihiro Yoshimura, Daisuke Araoka, et al. · Nature Communications · 14
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Placing asteroid Bennu’s organic solids in molecular and elemental context with those in aqueously altered carbonaceous chondrites
2025 · George D. Cody, Conel M. O’D. Alexander, et al. · Geochimica et Cosmochimica Acta · 10
Extraterrestrial hydroxy amino acids in CM and CR carbonaceous chondrites
2021 · Toshiki Koga, Eric T. Parker, et al. · Meteoritics and Planetary Science · 10
Distribution of extraterrestrial nucleobases, other N-heterocycles, and their precursors in a sample from asteroid Bennu
2026 · Yasuhiro Oba, Toshiki Koga, et al. · Communications Chemistry · 7
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Compound-Specific Carbon and Nitrogen Isotopic Analyses of Underivatized Pyrimidine and Purine Nucleobases
2025 · Toshiki Koga, Yoshinori Takano, et al. · ACS Earth and Space Chemistry · 7
Enantioselective three-dimensional high-performance liquid chromatographic determination of amino acids in the Hayabusa2 returned samples from the asteroid Ryugu
2024 · Aogu Furusho, Chiharu Ishii, et al. · Journal of Chromatography Open · 6
The H, C and N abundances and isotopic compositions of samples with outer Solar System heritage: asteroid Bennu and the Tarda and Tagish Lake meteorites
2026 · Dionysis I. Foustoukos, Conel M. O’D. Alexander, et al. · Geochimica et Cosmochimica Acta · 3
Distribution of purine and pyrimidine bases in Antarctic carbonaceous meteorites
2026 · Yasuhiro Oba, Takuto Tomaru, et al. · Geochimica et Cosmochimica Acta · 1
Analytical Development for Detecting Femtomole-Level Organophosphorus Compounds in Biogeochemical Samples by Ion Chromatography/High-Resolution Mass Spectrometry
2025 · Yuta Hirakawa, Toshiki Koga, et al. · ACS Omega · 1
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OSIRIS-REx Returned a Pristine Sample of Asteroid Bennu: Takeaways from the Mission's Contamination Control and Knowledge Program
2026 · Dworkin, Jason P., Sandford, Scott A., et al. · arXiv (Cornell University)
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Works count: 42
Citation count: 1,395
H-index: 15
I10-index: 18
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