Proximal Analysis of Regolith Habitats and Protective Biomolecules in Situ by Laser Raman Spectroscopy: Overview of Terrestrial Antarctic Habitats and Mars Analogs

Wynn‐Williams, D. D.; Edwards, Howell G. M.

doi:10.1006/icar.1999.6307

Cited by 202 publications

(94 citation statements)

References 111 publications

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“…It is generally assumed that fungi live in soil as dormant propagules but areas under study falls in the cold temperate zone of the Himachal Pradesh where temperatures are extremely low that not only restrict microbial enzyme activity but also constrain the availability of liquid water for the hydration of these dormant propagules. (Russell, 1990;Crowe et al, 1992;Wynn-Williams and Edwards, 2000) also made same observations. However, the population of actinomycetes was higher than that of fungi because the former have the capability to metabolize diverse kind of complex compounds left after the decomposition of the organic substances, which are not generally attacked by other microorganisms to derive nutrition and energy (Hadar and Papadopoulou, 2012).…”

Section: The Data Depicted Insupporting

confidence: 66%

Assessment of Culturable Microbial Diversity Associated with Arnebia euchroma: A Critically Endangered Plant Growing in Trans-Himalayas of Himachal Pradesh, India

Devi¹,

Kaundal²

2017

Int.J.Curr.Microbiol.App.Sci

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Section: The Data Depicted Insupporting

confidence: 66%

Assessment of Culturable Microbial Diversity Associated with Arnebia euchroma: A Critically Endangered Plant Growing in Trans-Himalayas of Himachal Pradesh, India

Devi¹,

Kaundal²

2017

Int.J.Curr.Microbiol.App.Sci

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“…Knowledge of the terrestrial conditions under which organisms can colonise environments which represent extremes of temperature, radiation insulation, pressure, desiccation, salinity and pH leads to a better understanding of their survival strategies [1,2]. Survival of extremophile colonies in geological matrices and substrates depends fundamentally upon mecha-nisms of avoidance of harmful conditions, for example like UV radiation and the production of protective biochemicals through which the tolerance and adaptation to the hostile environmental conditions can be accomplished [3].…”

Section: Introductionmentioning

confidence: 99%

“…Several previous studies of extremophilic colonisation have demonstrated the viability of Raman spectroscopy for the in situ determination of extinct or extant biological material in the geological matrix, without involving the separation of the biological colonies from their inorganic mineral host matrices. This approach provides novel information at the molecular level about the important organic/inorganic interactions [1,2,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

The Rio Tinto Mars Analogue site: An extremophilic Raman spectroscopic study

Edwards

Vandenabeele

Villar

et al. 2007

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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The Rio Tinto site is recognised as a terrestrial Mars analogue because of the presence of jarosite and related sulfates which have recently been identified by the NASA Mars Exploration Rover "Opportunity" in the El Capitan region of Meridiani Planum on Mars. It has long been known that acidophilic microbial action is responsible for the deep blood-red colour of the water in Rio Tinto, where the pH varies from about 1.5 to 3.0 and the water is rich in iron and sulfur. Following recent Raman spectroscopic characterisation of the mineral phases of the Rio Tinto system, we report here a study of the biological components found in several specimens of deposited minerals and near the waterside that were collected during a GeoRaman VI Conference organized field trip in 2006. Key biosignatures were found for carotenoids, scytonemin and mycosporine-like amino acids, which are indicative of the biological colonisation of exposed mineral substrates; information from this study will be useful for targeting Martian sites using a miniaturized Raman instrument where the biosignatures of relict or extant life could remain in the geological record.

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“…[21,22]), pigments in ancient paintings [23], manuscript and other artifacts [24,25], biogenic minerals [26,27] and biomolecules (e.g. [28]). Of interest to the geologic community, and particularly for planetary exploration, is the possibility to unambiguously identify various minerals on planetary surfaces by their characteristic Raman peaks [6,29,30].…”

Section: Introductionmentioning

confidence: 99%

Stand-off Raman spectroscopic detection of minerals on planetary surfaces

Sharma

Lucey

Ghosh

et al. 2003

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

193

120

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We have designed and developed two breadboard versions of stand-off Raman spectroscopic systems for landers based on a 5-in. Maksutov Á/Cassegrain telescope and a small (4-in. diameter) Newtonian telescope receiver. These systems are capable of measuring the Raman spectra of minerals located at a distance of 4.5 Á/66 m from the telescope. Both continuous wave (CW) Ar-ion and frequency doubled Nd:YAG (532 nm) pulsed (20 Hz) lasers are used as excitation sources for measuring remote Raman spectra of rocks and minerals. We have also made complementary measurements on the same rock samples with a micro-Raman system in 180 and 1358 geometry for evaluating the system performance and for estimating effect of grain size and laser-induced heating on the spectra of minerals using aquartz as a model mineral. A field portable remote pulsed Raman spectroscopic system based on the 5-in. telescope and an f /2.2 spectrograph has been developed and tested. We have also demonstrated a prototype of a combined Raman and laser-induced breakdown spectroscopy (LIBS) system, capable of providing major element composition and mineralogical information on both biogenic and inorganic minerals at a distance of 10 m from the receiver. #

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Proximal Analysis of Regolith Habitats and Protective Biomolecules in Situ by Laser Raman Spectroscopy: Overview of Terrestrial Antarctic Habitats and Mars Analogs

Cited by 202 publications

References 111 publications

Assessment of Culturable Microbial Diversity Associated with Arnebia euchroma: A Critically Endangered Plant Growing in Trans-Himalayas of Himachal Pradesh, India

Assessment of Culturable Microbial Diversity Associated with Arnebia euchroma: A Critically Endangered Plant Growing in Trans-Himalayas of Himachal Pradesh, India

The Rio Tinto Mars Analogue site: An extremophilic Raman spectroscopic study

Stand-off Raman spectroscopic detection of minerals on planetary surfaces

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