Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars
The Raman spectra of cyanobacterial species, Gloecapsa and Nostoc , in clear gypsum crystals from the Haughton Crater, Devon Island, Canadian High Arctic, site of a meteorite impact during the Miocene some 23 Mya, have been recorded using several visible and near-infrared excitation wavelengths. The...
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ftopenunivgb:oai:oro.open.ac.uk:5194 2024-06-23T07:50:30+00:00 Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars Edwards, Howell G.M. Villar, Susana E. Jorge Parnell, John Cockell, Charles S. Lee, Pascal 2005 https://oro.open.ac.uk/5194/ unknown Edwards, Howell G.M.; Villar, Susana E. Jorge; Parnell, John; Cockell, Charles S. <https://oro.open.ac.uk/view/person/csc235.html> and Lee, Pascal (2005). Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars. Analyst, 130 pp. 917–923. Journal Item PeerReviewed 2005 ftopenunivgb 2024-06-05T00:37:03Z The Raman spectra of cyanobacterial species, Gloecapsa and Nostoc , in clear gypsum crystals from the Haughton Crater, Devon Island, Canadian High Arctic, site of a meteorite impact during the Miocene some 23 Mya, have been recorded using several visible and near-infrared excitation wavelengths. The best spectra were obtained using a green wavelength at 514.5 nm and a confocal microscope with an image footprint of about 2 µ in diameter and 2 µ theoretical depth. Raman biosignatures for beta-carotene and scytonemin were obtained for one type of colony and parietin and beta-carotene for another; chlorophyll was detected in both types of colony. The different combination of these radiation protectant biomolecules suggests that the two cyanobacterial colonies, namely Nostoc and Gloecapsa , are adopting different survival strategies in the system. Confocal spectroscopic probing of the gypsum crystals exhibited sufficient discrimination for the identification of the biomolecules through the gypsum crystal, in simulation of the detection of extant or extinct halotrophs. This supports the viability of Raman spectroscopic techniques for incorporation as part of the instrumentation suite of a robotic lander for planetary surface exploration for the detection of organisms inside sulfate crystals from previous hydrothermal activity on Mars. Article in Journal/Newspaper Arctic Devon Island The Open University: Open Research Online (ORO) Arctic Devon Island ENVELOPE(-88.000,-88.000,75.252,75.252) The Analyst 130 6 917 |
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Open Polar |
collection |
The Open University: Open Research Online (ORO) |
op_collection_id |
ftopenunivgb |
language |
unknown |
description |
The Raman spectra of cyanobacterial species, Gloecapsa and Nostoc , in clear gypsum crystals from the Haughton Crater, Devon Island, Canadian High Arctic, site of a meteorite impact during the Miocene some 23 Mya, have been recorded using several visible and near-infrared excitation wavelengths. The best spectra were obtained using a green wavelength at 514.5 nm and a confocal microscope with an image footprint of about 2 µ in diameter and 2 µ theoretical depth. Raman biosignatures for beta-carotene and scytonemin were obtained for one type of colony and parietin and beta-carotene for another; chlorophyll was detected in both types of colony. The different combination of these radiation protectant biomolecules suggests that the two cyanobacterial colonies, namely Nostoc and Gloecapsa , are adopting different survival strategies in the system. Confocal spectroscopic probing of the gypsum crystals exhibited sufficient discrimination for the identification of the biomolecules through the gypsum crystal, in simulation of the detection of extant or extinct halotrophs. This supports the viability of Raman spectroscopic techniques for incorporation as part of the instrumentation suite of a robotic lander for planetary surface exploration for the detection of organisms inside sulfate crystals from previous hydrothermal activity on Mars. |
format |
Article in Journal/Newspaper |
author |
Edwards, Howell G.M. Villar, Susana E. Jorge Parnell, John Cockell, Charles S. Lee, Pascal |
spellingShingle |
Edwards, Howell G.M. Villar, Susana E. Jorge Parnell, John Cockell, Charles S. Lee, Pascal Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars |
author_facet |
Edwards, Howell G.M. Villar, Susana E. Jorge Parnell, John Cockell, Charles S. Lee, Pascal |
author_sort |
Edwards, Howell G.M. |
title |
Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars |
title_short |
Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars |
title_full |
Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars |
title_fullStr |
Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars |
title_full_unstemmed |
Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars |
title_sort |
raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on mars |
publishDate |
2005 |
url |
https://oro.open.ac.uk/5194/ |
long_lat |
ENVELOPE(-88.000,-88.000,75.252,75.252) |
geographic |
Arctic Devon Island |
geographic_facet |
Arctic Devon Island |
genre |
Arctic Devon Island |
genre_facet |
Arctic Devon Island |
op_relation |
Edwards, Howell G.M.; Villar, Susana E. Jorge; Parnell, John; Cockell, Charles S. <https://oro.open.ac.uk/view/person/csc235.html> and Lee, Pascal (2005). Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars. Analyst, 130 pp. 917–923. |
container_title |
The Analyst |
container_volume |
130 |
container_issue |
6 |
container_start_page |
917 |
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1802641405432037376 |