Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Kathie L. Thomas-Keprta"'
Autor:
Kathie L. Thomas-Keprta, Simon J. Clemett, Everett K. Gibson, Zia Rahman, Neha Baskar, Susan J. Wentworth, Nathaniel T. Keprta, David S. McKay
Publikováno v:
Geochimica et Cosmochimica Acta. 320:41-78
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cc3cefd891d24f8a0e24eb6f532e6ac
https://doi.org/10.1016/j.gca.2021.12.010
https://doi.org/10.1016/j.gca.2021.12.010
Publikováno v:
Meteoritics & Planetary Science. 55:102-129
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05ec0a6a6e6514b89f2b45d000d42486
https://doi.org/10.1111/maps.13424
https://doi.org/10.1111/maps.13424
Autor:
William T. Wallace, Lawrence A. Taylor, D. S. McKay, S. J. Wentworth, J.T. James, Carle M. Pieters, Kathie L. Thomas-Keprta, B.L. Cooper, Tai Sik Lee
Publikováno v:
Acta Astronautica. 107:163-176
We separated the respirable dust and other size fractions from Apollo 14 bulk sample 14003,96 in a dry nitrogen environment. While our toxicology team performed in vivo and in vitro experiments with the respirable fraction, we studied the size distri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73bc747aca3a767a2eb58ddf7a2909ec
https://doi.org/10.1016/j.actaastro.2014.10.032
https://doi.org/10.1016/j.actaastro.2014.10.032
Publikováno v:
Geology. 42:515-518
Impact cratering can destroy life from local to global scales and result in sudden turnovers of dominant genera and/or species. Here we report that it can also preserve components of the local biology present at the time of impact. We have investigat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c567b88321ebada4bb9fde39981821f3
https://doi.org/10.1130/g35343.1
https://doi.org/10.1130/g35343.1
Autor:
Scott Messenger, Zia Ur Rahman, Loan Le, Daniel K. Ross, William Peabody, David S. McKay, Everett K. Gibson, Simon J. Clemett, Carla Gonzalez, Kathie L. Thomas-Keprta
Publikováno v:
Geochimica et Cosmochimica Acta. 134:1-15
Carbonaceous matter on the surfaces of black pyroclastic beads, collected from Shorty crater during the Apollo 17 mission, represents the first identification of complex organic material associated with any lunar sample. We report the chemical, physi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::146c99b9dfa7aa983a013a6b5a03ec94
https://doi.org/10.1016/j.gca.2014.02.047
https://doi.org/10.1016/j.gca.2014.02.047
Autor:
David S. McKay, Lauren M. White, Simon J. Clemett, Everett K. Gibson, Kathie L. Thomas-Keprta
Publikováno v:
Astrobiology. 14:170-181
We report the first observation of indigenous carbonaceous matter in the martian meteorite Yamato 000593. The carbonaceous phases are heterogeneously distributed within secondary iddingsite alteration veins and present in a range of morphologies incl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5179b82c74fe25abc76254a1172f4e65
https://doi.org/10.1089/ast.2011.0733
https://doi.org/10.1089/ast.2011.0733
Publikováno v:
Astrobiology. 13:1203-1206
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::465766cda4e6edd1dd44888b14edbbfe
https://doi.org/10.1089/ast.2013.8425
https://doi.org/10.1089/ast.2013.8425
Autor:
Igor Brown, Kathie L. Thomas-Keprta, Donald A. Bryant, Eric S. Boyd, Svetlana Sarkisova, Dale A. Casamatta, Gaozhong Shen, Daniel H. Garrison, David S. McKay, Joel E. Graham, John W. Peters
Publikováno v:
Applied and Environmental Microbiology. 76:6664-6672
Despite the high potential for oxidative stress stimulated by reduced iron, contemporary iron-depositing hot springs with circum-neutral pH are intensively populated with cyanobacteria. Therefore, studies of the physiology, diversity, and phylogeny o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::057e2357d7a3afcaace2899816f220a1
https://doi.org/10.1128/aem.00662-10
https://doi.org/10.1128/aem.00662-10
Autor:
Simon J. Clemett, Kathie L. Thomas-Keprta, David S. McKay, Susan J. Wentworth, Everett K. Gibson
Publikováno v:
Geochimica et Cosmochimica Acta. 73:6631-6677
The Martian meteorite ALH84001 preserves evidence of interaction with aqueous fluids while on Mars in the form of microscopic carbonate disks. These carbonate disks are believed to have precipitated 3.9 Ga ago at beginning of the Noachian epoch on Ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01ebbbc9294454e146b183c7e7aeb196
https://doi.org/10.1016/j.gca.2009.05.064
https://doi.org/10.1016/j.gca.2009.05.064
Autor:
Everett K. Gibson, David S. McKay, Kathie L. Thomas-Keprta, Simon J. Clemett, Christopher S. Romanek, Susan J. Wentworth
Publikováno v:
Symposium - International Astronomical Union. 213:203-208
Martian Meteorite ALH84001 contains four unusual features which have been interpreted as possible signatures of relic biogenic activity. After six years of intense study by the world's scientific community, the current status of the biogenic hypothes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbd2916b98712d54bb47540a9cc37421
https://doi.org/10.1017/s0074180900193283
https://doi.org/10.1017/s0074180900193283