Zobrazeno 1 - 10
of 148
pro vyhledávání: '"Martin J Van Kranendonk"'
Autor:
Jan-Peter Duda, Martin J Van Kranendonk, Volker Thiel, Danny Ionescu, Harald Strauss, Nadine Schäfer, Joachim Reitner
Publikováno v:
PLoS ONE, Vol 11, Iss 1, p e0147629 (2016)
Paleoarchean rocks from the Pilbara Craton of Western Australia provide a variety of clues to the existence of early life on Earth, such as stromatolites, putative microfossils and geochemical signatures of microbial activity. However, some of these
Externí odkaz:
https://doaj.org/article/992a6518b46a4ad0b8dd271f740d9330
Autor:
Emmanuelle Gérard, David Moreira, Pascal Philippot, Martin J Van Kranendonk, Purificación López-García
Publikováno v:
PLoS ONE, Vol 4, Iss 4, p e5298 (2009)
BackgroundSeveral abiotic processes leading to the formation of life-like signatures or later contamination with actual biogenic traces can blur the interpretation of the earliest fossil record. In recent years, a large body of evidence showing the o
Externí odkaz:
https://doaj.org/article/fb9105b67e814ced809bded195521e01
Autor:
Bronwyn L. Teece, Jeff R. Havig, Simon C. George, Trinity L. Hamilton, Raphael J. Baumgartner, Julie Hartz, Martin J. Van Kranendonk
Publikováno v:
Astrobiology. 23:155-171
Active hot springs are dynamic geobiologically active environments. Heat- and element-enriched fluids form hot spring sinter deposits that are inhabited by microbial and macroscopic eukaryotic communities, but it is unclear how variable heat, fluid c
Publikováno v:
Life, Vol 11, Iss 12, p 1413 (2021)
Metal ions strongly affect the self-assembly and stability of membranes composed of prebiotically relevant amphiphiles (protoamphiphiles). Therefore, evaluating the behavior of such amphiphiles in the presence of ions is a crucial step towards assess
Externí odkaz:
https://doaj.org/article/82556ea3bc3f45c585d60458bd236659
Publikováno v:
The Depositional Record. 8:590-602
Publikováno v:
ACS Central Science, Vol 8, Iss 1, Pp 132-139 (2022)
ACS Central Science
ACS Central Science
The encapsulation of genetic polymers inside lipid bilayer compartments (vesicles) is a vital step in the emergence of cell-based life. However, even though acidic conditions promote many reactions required for generating prebiotic building blocks, p
Autor:
Allen P. Nutman, Clark R.L. Friend, Allan R. Chivas, Martin J. Van Kranendonk, Vickie C. Bennett
Publikováno v:
American Journal of Science. 321:643-679
The arcuate, 35 km long Isua supracrustal belt (ISB, southern West Greenland) contains the world9s largest remnants of Eoarchean volcanic and sedimentary sequences. The ISB is broadly divided into: (i) the northern Inner Arc Group of 3720 to 3690 Ma
Publikováno v:
Astrobiology. 21:115-135
Hyperspectral and micro X-ray fluorescence (μXRF) imagery were used to derive maps of mineralogy and elemental chemistry from a sample of a siliceous hot spring deposit, or sinter, collected from a landslide breccia deposit at the base of the Paeroa
Autor:
Tara Djokic, Raphael J. Baumgartner, Eizo Nakamura, Martin J. Van Kranendonk, Ulf Garbe, Tsutomu Ota, Luke Steller
Publikováno v:
Astrobiology. 21:39-59
For decades, deep sea hydrothermal vents have been a preferred setting for the Origin of Life, but "The Water Problem" as relates to polymerization of organic molecules, together with a propensity to dilute critical prebiotic elements as well as a nu
Autor:
Raphael J. Baumgartner, Anais Pagès, Marco L. Fiorentini, Chris Ryan, Martin J. Van Kranendonk, David Wacey, Charlie Kong, Martin Saunders
Publikováno v:
Geobiology. 18:415-425
The shallow marine and subaerial sedimentary and hydrothermal rocks of the ~3.48 billion-year-old Dresser Formation are host to some of Earth's oldest stromatolites and microbial remains. This study reports on texturally distinctive, spherulitic bari