Understanding the origin of organic material on Mars is a major issue in modern planetary science. Recent robotic exploration of Martian sedimentary rocks and laboratory analyses of Martian meteorites have both reported plausible indigenous organi...
Phobos and Deimos occupy unique positions both scientifically and programmatically on the road to the exploration of the solar system. Japan Aerospace Exploration Agency (JAXA) plans a Phobos sample return mission (MMX: Martian Moons eXploration)....
Haruna Sugahara   Cornelia Meinert   Laurent Nahon   Nykola C. Jones   Søren V. Hoffmann   Kenji Hamase   Yoshinori Takano   Uwe J. Meierhenrich   
Biochimica et Biophysica Acta - Proteins and Proteomics 1866(7) 743-758 2018年7月 [査読有り]
Living organisms on the Earth almost exclusively use L-amino acids for the molecular architecture of proteins. The biological occurrence of D-amino acids is rare, although their functions in various organisms are being gradually understood. A poss...
Phobos and Deimos occupy unique positions both scientifically and programmatically on the road to the exploration of the solar system. Japan Aerospace Exploration Agency (JAXA) plans a Phobos sample return mission (MMX: Martian Moons eXploration)....
西オーストラリア、ピルバラ地塊の太古代(>3.0Ga)黒色チャート(Farrel Quartzite層)からSugitani et al.(2007)により形態的多様性をもつ微化石が報告されている。本研究では、この黒色チャートの成因を明らかにするために、希土類元素およびYの分析を行った。微化石を含むチャートは蒸発岩を伴って産出するが、同じ地域の異なる産状をもつ黒色チャート(岩脈チャート、層状チャート、微化石を含まない蒸発岩を伴うチャート)も比較のために分析された。頁岩(PAAS)で規格化し...