Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Emmanuelle J. Javaux"'
Autor:
Catherine F. Demoulin, Marie Catherine Sforna, Yannick J. Lara, Yohan Cornet, Andrea Somogyi, Kadda Medjoubi, Daniel Grolimund, Dario Ferreira Sanchez, Remi Tucoulou Tachoueres, Ahmed Addad, Alexandre Fadel, Philippe Compère, Emmanuelle J. Javaux
Publikováno v:
iScience, Vol 27, Iss 2, Pp 108865- (2024)
Summary: Deciphering the fossil record of cyanobacteria is crucial to understand their role in the chemical and biological evolution of the early Earth. They profoundly modified the redox conditions of early ecosystems more than 2.4 Ga ago, the age o
Externí odkaz:
https://doaj.org/article/026761f6eae1479cb95786e4d529cb3f
Autor:
Marie Catherine Sforna, Corentin C. Loron, Catherine F. Demoulin, Camille François, Yohan Cornet, Yannick J. Lara, Daniel Grolimund, Dario Ferreira Sanchez, Kadda Medjoubi, Andrea Somogyi, Ahmed Addad, Alexandre Fadel, Philippe Compère, Daniel Baudet, Jochen J. Brocks, Emmanuelle J. Javaux
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-8 (2022)
The authors report nickel-porphyrins derivatives of chlorophyll in ~1 Gyr-old multicellular eukaryotes, preserved in low-grade metamorphic rocks. This brand new approach permits to identify early phototrophic organisms through the geological record.
Externí odkaz:
https://doaj.org/article/7fde3619898245ec968867c08c318d88
Publikováno v:
BMC Research Notes, Vol 11, Iss 1, Pp 1-6 (2018)
Abstract Objective Cyanobacteria are an ancient phylum of prokaryotes that contain the class Oxyphotobacteria. This group has been extensively studied by phylogenomics notably because it is widely accepted that Cyanobacteria were responsible for the
Externí odkaz:
https://doaj.org/article/e2066bc9589e4f3f9b66fccdd7afc6fe
Autor:
Kevin Lepot, Ahmed Addad, Andrew H. Knoll, Jian Wang, David Troadec, Armand Béché, Emmanuelle J. Javaux
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-11 (2017)
Fossil microorganisms older than 1.7 billion years are challenging to interpret due to their size, simple shapes, and alteration. Here, in 1.88 billion year old microfossils, the authors show a pattern of cellular preservation and internal iron nanom
Externí odkaz:
https://doaj.org/article/3689210e18564faeae7dad8027555c0f
Publikováno v:
Perspectives on Science. :1-40
Disagreement in science exists in a variety of strengths, from doubt-raising articles and issues of non-reproducibility up to raging disputes and major controversies. An often-latent form of disagreement consists of misconceptions whereby false ideas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c16afea5f1fdca2b567e8410c3903c1d
https://doi.org/10.1162/posc_a_00590
https://doi.org/10.1162/posc_a_00590
Autor:
Yannick J. Lara, Andréa McCann, Cédric Malherbe, Camille François, Catherine F. Demoulin, Marie Catherine Sforna, Gauthier Eppe, Edwin De Pauw, Annick Wilmotte, Philippe Jacques, Emmanuelle J. Javaux
Publikováno v:
Astrobiology. 22:735-754
Ultraviolet (UV)-screening compounds represent a substantial asset for the survival of cyanobacteria in extreme environments exposed to high doses of UV radiations on modern and early Earth. Among these molecules, the halochromic pigment gloeocapsin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7ddf5475b8702083c612c79929c23ee
https://doi.org/10.1089/ast.2021.0061
https://doi.org/10.1089/ast.2021.0061
Autor:
Lucas Demaret, Ian B. Hutchinson, Richard Ingley, Howell G.M. Edwards, Nathalie Fagel, Philippe Compere, Emmanuelle J. Javaux, Gauthier Eppe, Cédric Malherbe
Publikováno v:
Astrobiology. 22(9)
On Earth, the circulation of Fe-rich fluids in hydrothermal environments leads to characteristic iron mineral deposits, reflecting the pH and redox chemical conditions of the hydrothermal system, and is often associated with chemotroph microorganisms
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::737496fd2483d7166ce233f937b76074
https://pubmed.ncbi.nlm.nih.gov/35704291
https://pubmed.ncbi.nlm.nih.gov/35704291
Autor:
Maxime Coutant, Kevin Lepot, Alexandre Fadel, Ahmed Addad, Elodie Richard, David Troadec, Sandra Ventalon, Kenichiro Sugitani, Emmanuelle J. Javaux
Publikováno v:
Geobiology
Geobiology, 2022, 20 (5), pp.599-622. ⟨10.1111/gbi.12506⟩
Geobiology, 2022, 20 (5), pp.599-622. ⟨10.1111/gbi.12506⟩
International audience; The morphogenesis of most carbonaceous microstructures that resemble microfossils in Archean (4–2.5 Ga old) rocks remains debated. The associated carbonaceous matter may even—in some cases—derive from abiotic organic mol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7abe6ae8109ddd4fef549fb591b3a38
https://pubmed.ncbi.nlm.nih.gov/35712885
https://pubmed.ncbi.nlm.nih.gov/35712885
Autor:
Emmanuelle J. Javaux
Publikováno v:
Encyclopedia of Astrobiology ISBN: 9783642278334
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae0922aa1ec1af295099c04bcd2adaae
https://doi.org/10.1007/978-3-642-27833-4_1306-4
https://doi.org/10.1007/978-3-642-27833-4_1306-4
Autor:
Emmanuelle J. Javaux
Publikováno v:
Encyclopedia of Astrobiology ISBN: 9783642278334
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b5faec148c1da90187ccff9ccfbc2b0
https://doi.org/10.1007/978-3-642-27833-4_460-5
https://doi.org/10.1007/978-3-642-27833-4_460-5