Search Results - "Naraoka, Hiroshi"

A new family of extraterrestrial amino acids in the Murchison meteorite by Koga, Toshiki, Naraoka, Hiroshi

“…The occurrence of extraterrestrial organic compounds is a key for understanding prebiotic organic synthesis in the universe. In particular, amino acids have…”
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Identifying the Wide Diversity of Extraterrestrial Purine and Pyrimidine Nucleobases in Carbonaceous Meteorites by Oba, Yasuhiro, Takano, Yoshinori, Furukawa, Yoshihiro, Koga, Toshiki, Glavin, Daniel P, Dworkin, Jason P, Naraoka, Hiroshi

“…The lack of pyrimidine diversity in meteorites remains a mystery since prebiotic chemical models and laboratory experiments have predicted that these compounds…”
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Nucleobase synthesis in interstellar ices by Oba, Yasuhiro, Takano, Yoshinori, Naraoka, Hiroshi, Watanabe, Naoki, Kouchi, Akira

“…The synthesis of nucleobases in natural environments, especially in interstellar molecular clouds, is the focus of a long-standing debate regarding prebiotic…”
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Extraterrestrial hexamethylenetetramine in meteorites—a precursor of prebiotic chemistry in the inner solar system by Oba, Yasuhiro, Takano, Yoshinori, Naraoka, Hiroshi, Furukawa, Yoshihiro, Glavin, Daniel P., Dworkin, Jason P., Tachibana, Shogo

“…Despite extensive studies on the formation of organic molecules in various extraterrestrial environments, it still remains under debate when, where, and how…”
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Interactions between organic compounds and olivine under aqueous conditions: A potential role for organic distribution in carbonaceous chondrites by Muneishi, Keisuke, Naraoka, Hiroshi

“…Olivine is a principal anhydrous silicate mineral in chondritic meteorites. The structure of this mineral is composed of independent SiO4 tetrahedra linked by…”
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High‐mass resolution molecular imaging of organic compounds on the surface of Murchison meteorite by Hashiguchi, Minako, Naraoka, Hiroshi

“…High‐resolution mass spectrometry (HRMS) imaging by desorption electrospray ionization (DESI) coupled with Orbitrap MS using methanol (MeOH) spray was…”
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Three-dimensional high-performance liquid chromatographic analysis of chiral amino acids in carbonaceous chondrites by Furusho, Aogu, Akita, Takeyuki, Mita, Masashi, Naraoka, Hiroshi, Hamase, Kenji

“…•A 3D-HPLC system was developed for the determination of chiral amino acids.•Enantiomers of Ala, 2AB, Val, nVal and iVal were determined.•All 5 target amino…”
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Marine osmium isotope record during the Carnian “pluvial episode” (Late Triassic) in the pelagic Panthalassa Ocean by Tomimatsu, Yuki, Nozaki, Tatsuo, Sato, Honami, Takaya, Yutaro, Kimura, Jun-Ichi, Chang, Qing, Naraoka, Hiroshi, Rigo, Manuel, Onoue, Tetsuji

“…The Carnian Pluvial Episode (CPE) was a global environmental change and biotic crisis that occurred during the Carnian (Late Triassic). The climate during the…”
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Ryugu Asteroid Sample Return Provides A Natural Laboratory for Primordial Chemical Evolution by Oba, Yasuhiro, Takano, Yoshinori, Dworkin, Jason P., Naraoka, Hiroshi

“…The samples returned from near-Earth asteroid (162173) Ryugu provide a pristine record of the 4.6 billion years since the birth of the Solar System. The…”
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Distinct distribution of soluble N-heterocyclic compounds between CM and CR chondrites by Naraoka, Hiroshi, Hashiguchi, Minako

“…Very complex mixtures of organic compounds occur in extraterrestrial materials such as carbonaceous meteorites. These intricate signatures of meteoritic…”
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Precometary organic matter: A hidden reservoir of water inside the snow line by Nakano, Hideyuki, Hirakawa, Naoki, Matsubara, Yasuhiro, Yamashita, Shigeru, Okuchi, Takuo, Asahina, Kenta, Tanaka, Ryo, Suzuki, Noriyuki, Naraoka, Hiroshi, Takano, Yoshinori, Tachibana, Shogo, Hama, Tetsuya, Oba, Yasuhiro, Kimura, Yuki, Watanabe, Naoki, Kouchi, Akira

“…The origin and evolution of solar system bodies, including water on the Earth, have been discussed based on the assumption that the relevant ingredients were…”
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Soluble Sulfur-Bearing Organic Compounds in Carbonaceous Meteorites: Implications for Chemical Evolution in Primitive Asteroids by Naraoka, Hiroshi, Hashiguchi, Minako, Okazaki, Ryuji

“…Sulfur comprises various compound forms in natural environments and could have played important roles in chemical evolution in the universe. Various soluble…”
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Deuterium Fractionation upon the Formation of Hexamethylenetetramines through Photochemical Reactions of Interstellar Ice Analogs Containing Deuterated Methanol Isotopologues by Oba, Yasuhiro, Takano, Yoshinori, Naraoka, Hiroshi, Kouchi, Akira, Watanabe, Naoki

“…Hexamethylenetetramine (HMT) is a representative product after the photolysis of interstellar ice analogs containing methanol followed by warming-up to room…”
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Synthesis of Amino Acids from Aldehydes and Ammonia: Implications for Organic Reactions in Carbonaceous Chondrite Parent Bodies by Koga, Toshiki, Naraoka, Hiroshi

“…The Strecker cyanohydrin synthesis is a known mechanism for the formation of amino acids from aldehydes, ammonia, and cyanide. An alternative mechanism for…”
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Chondrule-like objects and Ca-Al-rich inclusions in Ryugu may potentially be the oldest Solar System materials by Nakashima, Daisuke, Nakamura, Tomoki, Zhang, Mingming, Kita, Noriko T., Mikouchi, Takashi, Yoshida, Hideto, Enokido, Yuma, Morita, Tomoyo, Kikuiri, Mizuha, Amano, Kana, Kagawa, Eiichi, Yada, Toru, Nishimura, Masahiro, Nakato, Aiko, Miyazaki, Akiko, Yogata, Kasumi, Abe, Masanao, Okada, Tatsuaki, Usui, Tomohiro, Yoshikawa, Makoto, Saiki, Takanao, Tanaka, Satoshi, Nakazawa, Satoru, Terui, Fuyuto, Yurimoto, Hisayoshi, Noguchi, Takaaki, Yabuta, Hikaru, Naraoka, Hiroshi, Okazaki, Ryuji, Sakamoto, Kanako, Watanabe, Sei-ichiro, Tachibana, Shogo, Tsuda, Yuichi

“…Chondrule-like objects and Ca-Al-rich inclusions (CAIs) are discovered in the retuned samples from asteroid Ryugu. Here we report results of oxygen isotope,…”
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Two homologous series of alkylpyridines in the Murchison meteorite by YAMASHITA, YOHEI, NARAOKA, HIROSHI

“…Two homologous series of alkylpyridines (CnH2n-5N and CnH2n-7N) were identified in the methanol extract of the Murchison meteorite by liquid…”
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Three-Dimensional Structure of Hayabusa Samples: Origin and Evolution of Itokawa Regolith by Tsuchiyama, Akira, Uesugi, Masayuki, Matsushima, Takashi, Michikami, Tatsuhiro, Kadono, Toshihiko, Nakamura, Tomoki, Uesugi, Kentaro, Nakano, Tsukasa, Sandford, Scott A., Noguchi, Ryo, Matsumoto, Toru, Matsuno, Junya, Nagano, Takashi, Imai, Yuta, Takeuchi, Akihisa, Suzuki, Yoshio, Ogami, Toshihiro, Katagiri, Jun, Ebihara, Mitsuru, Ireland, Trevor R., Kitajima, Fumio, Nagao, Keisuke, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Yurimoto, Hisayoshi, Zolensky, Michael E., Mukai, Toshifumi, Abe, Masanao, Yada, Toru, Fujimura, Akio, Yoshikawa, Makoto, Kawaguchi, Junichiro

“…Regolith particles on the asteroid Itokawa were recovered by the Hayabusa mission. Their three-dimensional (3D) structure and other properties, revealed by…”
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Profiling Murchison Soluble Organic Matter for New Organic Compounds with APPI- and ESI-FT-ICR MS by Hertzog, Jasmine, Naraoka, Hiroshi, Schmitt-Kopplin, Philippe

“…The investigation of the abundant organic matter in primitive meteorite such as carbonaceous chondrites is of major interest in the field of origin of life. In…”
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Antarctic micrometeorite composed of CP and CS IDP‐like material: A micro‐breccia originated from a partially ice‐melted comet‐like small body by Noguchi, Takaaki, Matsumoto, Rikako, Yabuta, Hikaru, Kobayashi, Hanae, Miyake, Akira, Naraoka, Hiroshi, Okazaki, Ryuji, Imae, Naoya, Yamaguchi, Akira, Kilcoyne, A. L. David, Takeichi, Yasuo, Takahashi, Yoshio

“…Asteroids and comets are thought to form in the inner and outer solar systems, respectively. Chondritic porous and smooth interplanetary dust particles (CP…”
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New Applications of High-Resolution Analytical Methods to Study Trace Organic Compounds in Extraterrestrial Materials by Naraoka, Hiroshi, Hashiguchi, Minako, Sato, Yu, Hamase, Kenji

“…Organic compounds are present as complex mixtures in extraterrestrial materials including meteorites, which may have played important roles in the origin of…”
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