Search results for " cave"
showing 10 items of 124 documents
Free-living amoebae in sediments from the Lascaux Cave in France
2013
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 identified 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…
Two new species of the genus Ochroconis, O. lascauxensis and O. anomala isolated from black stains in Lascaux Cave, France
2012
In the year 2001, some conspicuous black stains appeared on the walls of Lascaux Cave in France, which progressively disseminated throughout the cave. These black stains were so evident by 2007 that they have become one of the cave's major problems. In a mycological study of the black stains, Ochroconis strains were abundant among the isolates and constituted the major group of melanised fungi. Two new species of the genus Ochroconis, O. lascauxensis and O. anomala, were isolated and described. The description is based on the morphology of the fungi and the phylogenetic relationships of two of its gene regions internal transcribed spacer (ITS) and RNA polymerase II subunit B (RPB2). In addi…
Uwarunkowania doktryny obronnej Niemiec i Polski na przykładzie polskiego i niemieckiego kontyngentu wojskowego w wojnie w Afganistanie
2018
Celem artykułu jest ukazanie różnic w podejściu do zagadnienia misji wojskowych przez polskie i niemieckie władze, co pozwoliło na zaobserwowanie znaczących różnic w prowadzeniu polityki zagranicznej, ze szczególnym uwzględnieniem bezpieczeństwa, przez oba państwa. W artykule szczególna uwaga poświęcona została zagadnieniu realizacji zobowiązań sojuszniczych wobec NATO i Stanów Zjednoczonych w obliczu konfliktu w Afganistanie.
L'anfiteatro di Sabratha: vecchie indagini e nuove ricerche
2012
L’Anfiteatro di Sabratha, ignorato dai viaggiatori del XVIII e XIX secolo, venne segnalato nel 1912 da Henri Méhier de Mathuisieulx ed indagato da Renato Bartoccini a partire dal 1924. Gli scavi e le ricerche portate avanti in quegli anni permisero di rimettere in luce gran parte del monumento, che rimase tuttavia non pubblicato. Recenti scavi e ricerche hanno adesso permesso di redigere un nuovo rilievo ed un nuovo studio del monumento. Il grande edificio, realizzato in conci di calcarenite locale, venne costruito sfruttando una cava di pietra alla periferia orientale della città antica probabilmente alla metà circa del II secolo d.C. e, contrariamente a quanto finora ritenuto, venne effet…
Sull’autorizzazione all’apertura di cave
1994
Le Vin & la Musique. Accords et désaccords
2018
International audience; Bacchus est le dieu de l'ivresse, des plaisirs sensuels, de la fertilité comme de l'inspiration. Son cortège est animé par des satyres et des ménades dont les activités sont associées à la danse, à l'amour et la musique. L'allégorie de la musique est elle aussi fréquemment associée à l'amour, à la sensualité et au vin. Depuis l'Antiquité, cette double inspiration mythique et symbolique est au coeur d'innombrables oeuvres plastiques et visuelles, mais aussi d'objets utilitaires au décor festif, d'oeuvres musicales ou chorégraphiques et d'instruments de musique. À toutes les époques, la fête, le banquet et la taverne ont associé le vin et la musique dans tous les milie…
The influence of light attenuation on the biogeomorphology of a marine karst cave, the Puerto Princesa Underground River, Palawan, The Philippines
2014
Diversity, ecology, distribution and biogeography of Diplura
2021
1. Diplura is the sister group to insects and one of the three basal hexapod groups with unique entognathan mouthparts. The order is divided into 10 families, which include 1008 species in 141 genera, with a high proportion of monotypic genera. They are ubiquitous in soils and subsurface terrestrial habitats, as well as have an important role in overall biogeochemical cycles. 2. We present the first comprehensive review of the global biodiversity and ecology of Diplura. We highlight four aspects of this basal hexapod group: diversity in morpho logical body plans and sizes; ecology in terrestrial environments from soil to caves; food preference and trophic levels, and their biogeographical a…
Some Considerations on 3-D and 2-D Numerical Models for the Assessment of the Stability of Underground Caves
2014
The application of numerical modeling to the analysis of the stability of both natural and man-made underground caves is rapidly increasing due to the availability of powerful numerical codes, that can account for either continuum or discontinuum behavior of the rock masses. Numerical methods allow to overcome traditional methods for cave stability analysis that assume too simplified geometrical, geological and geomechanical conditions. Further, they are also able to assess the potential failure mechanisms of underground systems. On the other hand, the application of numerical methods requires availability of a detailed geo-structural survey of the cave, as well as a proper geomechanical ch…
The Coastal Sulfuric Acid Cave System of Santa Cesarea Terme (Southern Italy)
2017
Santa Cesarea Terme in Salento is the only area in which hypogenic caves have been recognized in the Apulia region. In this spa area, the rising of sulfidic thermal waters that mix with both recent fresh infiltration waters and coastal salt water has formed four active sulfuric acid speleogenesis (SAS) caves. These caves are characterized by the typical set of sulfuric acid meso- and micromorphologies, and also by the presence of both gypsum and native sulfur. In all caves, biofilms are visible in the sulfidic thermal waters and on the cave walls.