Analysis of Salt-Containing Biofilms on Limestone Buildings of the Mayan Culture at Edzna, Mexico

Ortega-Morales, Benjamín Otto; Gaylarde, Christine C.; Englert, Gelsa Edith; Gaylarde, P.M.

doi:10.1080/01490450500182524

Cited by 51 publications

(20 citation statements)

References 23 publications

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“…[1][2][3][4][5][6][7]. The transport of water in building construction stones and historical monuments is one of the most important factors determining their durability, as it favors weathering processes such as acid dissolution in calcareous materials, growth of biological species, crystallization of soluble salts, and the swelling-contraction cycles due to hydration and temperature changes during day and night, in tropical environments [2,8,9].…”

Section: Introductionmentioning

confidence: 99%

Water Transport Monitoring in Calcium Carbonate Stones by Photoacoustic Spectroscopy

et al. 2010

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Calcium carbonate is the most abundant inorganic material, and it was used to build the ancient Mayan monuments in the peninsula of Yucatán, México. One of the most important challenges that these structures have to confront is related to water and its transport inside the stone that induces serious deterioration. In this study, the photoacoustic (PA) technique is used to monitor the water permeability of two kinds of solid and compacted powdered stones. The analysis of water permeability in stones is performed using a modified Rosencwaig PA cell. When the stones are in contact with the water reservoir, the PA signal amplitude is observed to decay gradually due to the progressive wetting of the sample. Based on this type of experiment, the water diffusion coefficients as well as the time evolution of the thermal effusivity are obtained.

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Section: Introductionmentioning

confidence: 99%

Water Transport Monitoring in Calcium Carbonate Stones by Photoacoustic Spectroscopy

et al. 2010

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“…The characterization of the epilithic cyanobacteria from natural environments, such as beach rock and caves, and from human-made environments, such as hypogea and buildings, has identified a variety of cyanobacteria. This includes both unicellular and filamentous forms, for example, Lyngbya-related species and Chroococcidiopsis (5,14,37,47).…”

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confidence: 99%

Isolation of Novel Extreme-Tolerant Cyanobacteria from a Rock-Dwelling Microbial Community by Using Exposure to Low Earth Orbit

Olsson-Francis

Torre

Cockell

2010

Appl Environ Microbiol

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Many cyanobacteria are known to tolerate environmental extremes. Motivated by an interest in selecting cyanobacteria for applications in space, we launched rocks from a limestone cliff in Beer, Devon, United Kingdom, containing an epilithic and endolithic rock-dwelling community of cyanobacteria into low Earth orbit (LEO) at a height of approximately 300 kilometers. The community was exposed for 10 days to isolate cyanobacteria that can survive exposure to the extreme radiation and desiccating conditions associated with space. Culture-independent (16S rRNA) and culture-dependent methods showed that the cyanobacterial community was composed of Pleurocapsales, Oscillatoriales, and Chroococcales. A single cyanobacterium, a previously uncharacterized extremophile, was isolated after exposure to LEO. We were able to isolate the cyanobacterium from the limestone cliff after exposing the rock-dwelling community to desiccation and vacuum (0.7 ؋ 10 ؊3 kPa) in the laboratory. The ability of the organism to survive the conditions in space may be linked to the formation of dense colonies. These experiments show how extreme environmental conditions, including space, can be used to select for novel microorganisms. Furthermore, it improves our knowledge of environmental tolerances of extremophilic rock-dwelling cyanobacteria.

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“…Analysis of SEM images using energy-dispersive X-ray spectroscopy further confirmed the presence of mineral salts in those biofilm samples. Coccoid and colony-forming filamentous cyanobacterial biofilms have been reported on salted portion of limestone buildings 14 . Using transmission electron microscope, Konhauser et al 15 have shown that mineralization of the Cyanobacterium calothrix species took place entirely on the extra-cellular polymeric substance (EPS) of the bacterium.…”

Section: Discussionmentioning

confidence: 99%

Characterization of Biotic and Abiotic Profiles of Greenhouse Evaporative Cooling System Fouling

Aa¹,

Ahmad²

2008

Trop. J. Pharm Res

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Analysis of Salt-Containing Biofilms on Limestone Buildings of the Mayan Culture at Edzna, Mexico

Cited by 51 publications

References 23 publications

Water Transport Monitoring in Calcium Carbonate Stones by Photoacoustic Spectroscopy

Water Transport Monitoring in Calcium Carbonate Stones by Photoacoustic Spectroscopy

Isolation of Novel Extreme-Tolerant Cyanobacteria from a Rock-Dwelling Microbial Community by Using Exposure to Low Earth Orbit

Characterization of Biotic and Abiotic Profiles of Greenhouse Evaporative Cooling System Fouling

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