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502 results on '"Saiz-Jimenez C"'

1. Free-living amoebae in sediments from the Lascaux Cave in France.

Author

Garcia-Sanchez A.M., Ariza C., Ubeda J.M., Martin-Sanchez P.M., Jurado V., Bastian F., Alabouvette C., and Saiz-Jimenez C.

Subjects
free living amoebae, Acanthamoeba, Hartmannella, Lascaux Cave, sediments, Biology (General), QH301-705.5, Geology, QE1-996.5
Abstract

The Lascaux Cave in France is an old karstic channel where the running waters are collected in a pool and pumped to the exterior. It is well-known that water bodies in the vicinity of humans are suspected to be reservoirs of amoebae and associated bacteria. In fact, the free-living amoebae Acanthamoeba astronyxis, Acanthamoeba castellanii, Acanthamoeba sp. and Hartmannella vermiformis were identif ied in the sediments of the cave using phylogenetic analyses and morphological traits. Lascaux Cave sediments and rock walls are wet due to a relative humidity near saturation and water condensation, and this environment and the presence of abundant bacterial communities constitute an ideal habitat for amoebae. The data suggest the need to carry out a detailed survey on all the cave compartments in order to determine the relationship between amoebae and pathogenic bacteria.

Published
2013

12. Cyanobacteria attack rocks (CATS): Control and preventive strategies to avoid damage caused by cyanobacteria and associated microorganisms in Roman hypogean monuments

Author

Albertano, P., primary, Moscone, D., additional, Palleschi, G., additional, Hermosin, B., additional, Saiz-Jimenez, C., additional, Sanchez-Moral, S., additional, Hernandez-Marine, M., additional, Urzì, C., additional, Groth, I., additional, Schroeckh, V., additional, Saarela, M., additional, Mattila-Sandholm, T., additional, Gallon, J.R., additional, Graziottin, F., additional, Bisconti, F., additional, and Giuliani, R., additional

Published
2017
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33. Recolonization of mortars by endolithic organisms on the walls of San Roque church in Campeche (Mexico): a case of tertiary bioreceptivity

Author

Jurado, V., Miller, A.Z., Cuezva, S., Fernandez-Cortes, A., Benavente, D., Rogerio-Candelera, M.A., Reyes, J., Canaveras, J.C., Sanchez-Moral, S., and Saiz-Jimenez, C.

Subjects
Mortar -- Analysis -- Mechanical properties, Biodegradation -- Analysis, Business, Construction and materials industries
Abstract

ABSTRACT San Roque church (Campeche, Mexico) was built at the end of the 17th century with a micritic limestone and lime mortar in baroque style. In 2005 the church exhibited [...]

Published
2014
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34. The microbiology of Lascaux Cave

Author

Bastian, F., Jurado, V., Novakova A., Alabouvette C., and Saiz-Jimenez, C.

Subjects
Lascaux Cave -- Environmental aspects, Microbial growth -- Influence, Microbial growth -- Control, Cave-drawings -- Protection and preservation, Cave-drawings -- Environmental aspects, Biological sciences
Abstract

Lascaux Cave (Montignac, France) contains paintings from the Upper Paleolithic period. Shortly after its discovery in 1940, the cave was seriously disturbed by major destructive interventions. In 1963, the cave was closed due to algal growth on the walls. In 2001, the ceiling, walls and sediments were colonized by the fungus Fusarium solani. Later, black stains, probably of fungal origin, appeared on the walls. Biocide treatments, including quaternary ammonium derivatives, were extensively applied for a few years, and have been in use again since January 2008. The microbial communities in Lascaux Cave were shown to be composed of human-pathogenic bacteria and entomopathogenic fungi, the former as a result of the biocide selection. The data show that fungi play an important role in the cave, and arthropods contribute to the dispersion of conidia. A careful study on the fungal ecology is needed in order to complete the cave food web and to control the black stains threatening the Paleolithic paintings. DOI 10.1099/mic.0.036160-0

Published
2010

36. Caves and karst environments.

Author

Lee, N. M., primary, Meisinger, D. B., additional, Aubrecht, R., additional, Kovacik, L., additional, Saiz-Jimenez, C., additional, Baskar, S., additional, Baskar, R., additional, Liebl, W., additional, Porter, M. L., additional, and Engel, A. S., additional

Published
2012
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49. Analytical pyrolysis of humic substances: pitfalls, limitations, and possible solutions

Author

Saiz-Jimenez, C.

Subjects
Pyrolysis -- Research, Humus -- Research, Environmental issues, Science and technology
Abstract

Analytic pyrolyis is a research method used in the examination of the structural properties of complex macromolecular materials. The application of this method to the study of humic substances, however, is limited by the numerous pitfalls that arise as a result of procedural problems caused by thermal reactions, pyrolysis unit configuration and chromatographic inaccuracy. Possible solutions to these methodological problems are discussed.

Published
1994

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