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NASA史上初、医療上の理由でISSミッション早期終了へ：Crew-11帰還の全貌と宇宙医療の限界
2026年1月、国際宇宙ステーション（ISS）運用史上、極めて異例かつ重大な決断が下された。NASA（アメリカ航空宇宙局）は、ISSに滞在中の「SpaceX Crew-11」ミッションの乗組員4名全員を、予定より1ヶ月以 […]
Term
Zena Cardman
別名: ゼナ・カードマン, Zena Cardman
Overview
最終更新: 2026年7月9日NASAの宇宙飛行士で、SpaceX Crew-11ミッションのコマンダーを務める。生物学や地質学の背景を持ち、ISSでの科学実験や船外活動を主導する役割を担っていた。
Mentioned Articles
1 件Research Papers
5 件- Verrucomicrobia Are Candidates for Polysaccharide-Degrading Bacterioplankton in an Arctic Fjord of Svalbard
- Anaerobic oxidation of methane at different temperature regimes in Guaymas Basin hydrothermal sediments
- Microbial Communities in Methane- and Short Chain Alkane-Rich Hydrothermal Sediments of Guaymas Basin
The hydrothermal sediments of Guaymas Basin, an active spreading center in the Gulf of California (Mexico), are rich in porewater methane, short-chain alkanes, sulfate and sulfide, and provide a model system to explore habitat preferences of microorganisms, including sulfate-dependent, methane- and short chain alkane-oxidizing microbial communities. In this study, hot sediments (above 60°C) covered with sulfur-oxidizing microbial mats surrounding a hydrothermal mound (termed “Mat Mound”) were characterized by porewater geochemistry of methane, C2–C6 short-chain alkanes, sulfate, sulfide, sulfate reduction rate measurements, in situ temperature gradients, bacterial and archaeal 16S rRNA gene clone libraries and V6 tag pyrosequencing. The most abundantly detected groups in the Mat mound sediments include anaerobic methane-oxidizing archaea of the ANME-1 lineage and its sister clade ANME-1Guaymas, the uncultured bacterial groups SEEP-SRB2 within the Deltaproteobacteria and the separately branching HotSeep-1 Group; these uncultured bacteria are candidates for sulfate-reducing alkane oxidation and for sulfate-reducing syntrophy with ANME archaea. The archaeal dataset indicates distinct habitat preferences for ANME-1, ANME-1-Guaymas, and ANME-2 archaea in Guaymas Basin hydrothermal sediments. The bacterial groups SEEP-SRB2 and HotSeep-1 co-occur with ANME-1 and ANME-1Guaymas in hydrothermally active sediments underneath microbial mats in Guaymas Basin. We propose the working hypothesis that this mixed bacterial and archaeal community catalyzes the oxidation of both methane and short-chain alkanes, and constitutes a microbial community signature that is characteristic for hydrothermal and/or cold seep sediments containing both substrates.
- A historical overview of the Pavilion Lake Research Project-Analog science and exploration in an underwater environment
- Prokaryote populations of extant microbialites along a depth gradient in Pavilion Lake, British Columbia, Canada