Search results for "Nature"
showing 10 items of 1564 documents
Density Decline in a Mediterranean Seahorse Population: Natural Fluctuations or New Emerging Threats?
2021
Illegal wildlife trade is considered one of the most serious threats to biodiversity worldwide, along with habitat loss/degradation and overfishing of wild stocks. Seahorses are considered at high risk as these fish represent an important component of traditional Chinese medicine but are also sold as curios and ornamental fish. On a worldwide level, illegal trade is controlled by numerous laws and regulations, but it seems to continue by assuming more dynamic routes. In the Mediterranean Sea, Hippocampus guttulatus formed one of the largest populations at Mar Piccolo di Taranto in South-Eastern Italy. During the routine monitoring of this population in 2016, a dramatic density decrease was …
Witkaco-Gombrowiczowskie tęsknoty i pragnienia, czyli od metafizyki do estetyki : interpretacje Jerzego Jarockiego
2016
Artykuł prezentuje sylwetki dwóch fascynujących twórców dwudziestowiecznego polskiego dramatu, opisanych na przykładzie Grzebania1 i Błądzenia2 - spektakli Jerzego Jarockiego. Opowiada o tęsknotach, pragnieniach, fobiach Stanisława Ignacego Witkiewicza i Witolda Gombrowicza, z których pierwszy uporczywie dążył do formy, a drugi - od formy pragnął się wyzwolić. „Palę, piję i nic mi to nie szkodzi” - pisał Witkacy w przedmowie do swoich Narkotyków. Z kolei Gombrowicz ustawicznie pisał o sobie, czyniąc z siebie samego bohatera własnych utworów. Jako punkt wyjścia dla moich rozważań wybrałam odmienne sposoby poszukiwania i zaspokajania pragnień duchowych oraz cielesnych.
Ero ja immersio. Tutkimus artefaktin ongelmasta ja aineellisen ja käsitteellisen välisistä suhteista
2021
Tutkimus on kulttuurifilosofinen ja kulttuurintutkimuksellinen väitöskirja aineellisen artefaktin ongelmasta ja filosofinen tutkimus aineellisen mieltämisen ehdoista. Ihmistekoisen statuksen uudelleen arvioinnin pohjalta kehitän siinä uuden tavan ajatella aineellista ja ruumiillista. Historiallisesti suhteellisen nuoreen artefaktin käsitteeseen on tullut materiaalisuuksien kasvun myötä sen painon sivuuttavaa itsestäänselvyyttä, kuten tapahtui ikivanhalle olemisen käsitteelle Martin Heideggerin käänteentekevän huomion mukaan. Käsitteen neutraloituminen onkin siitä välittymättömän aineellisuuden neutraloitumista, mitä kutsun konstituutioharhaksi. Konstituutioharha on modernissa vallitseva tap…
Action immunitaire de chimiothérapies anticancéreuses : un exemple à travers les modes d'actions des cellules "Interferon-producting Killer Dendritic…
2009
Classical antitumoral therapies are basically perceived as a direct and lytic action of the chosen therapeutic agent against tumor cells. Nevertheless, growing evidence indicates that some anticancer strategies can work through the action of the immune system. Imatinib Mesylate (IM), a targeted drug, helped us to unravel some mechanisms of action of a natural killer sub-population: the "Interferon-producing Killer dendritic Cells" (IKDC). Thoses cells possess anti-tumoral lytic capacities, synergistically amplified by IM and interleukine (IL)-2, under the dependency of IL-15, and also antigen-presenting capability. Those cells are capable of TRAIL-mediated lysis and of antigen uptake, proce…
Butterfly effect. Inhabiting post-industrial sites
2018
In the Fifties, Renaat Braem defined “jungle” the appearance of Belgian urbanization, where it is hardly recognizable a real shape or order unless its description of “diffused city”, following the infrastructural network. This is the “typical” Belgian way of settle in the territory, along with the highly infrastructural land and the heavy industries spotting all along the Walloon axis, the industrial backbone running east-west from Mons to Verviers. Nevertheless, now that the traditional industrial exploitation is near to an end, we can find a strong identity core in this landscape, anchored to the history of these places and to the practices that there used to be acted. Belgium itself can …
Droplet digital PCR as a tool for investigating dynamics of cryptic symbionts
2021
Abstract Interactions among symbiotic organisms and their hosts are major drivers of ecological and evolutionary processes. Monitoring the infection patterns among natural populations and identifying factors affecting these interactions are critical for understanding symbiont–host relationships. However, many of these interactions remain understudied since the knowledge about the symbiont species is lacking, which hinders the development of appropriate tools. In this study, we developed a digital droplet PCR (ddPCR) assay based on apicomplexan COX1 gene to detect an undescribed agamococcidian symbiont. We show that the method gives precise and reproducible results and enables detecting cryp…
Analysis of Prey Composition in Eurasian Reed Warblers' Acrocephalus scirpaceus Droppings at Four Breeding Sites in Italy
2022
Our aim was to investigate the among-populations diversity of prey composition in Eurasian Reed Warblers’ diets via their droppings, both to assess the ecological validity of this sampling method and to test whether the prey species most abundant in fecal samples were also the most present in the Italian study site. We collected fecal samples at four sites throughout Italy, for a total of 144 samples. Within reedbeds, the breeding habitat of the Eurasian Reed Warbler, we also collected arthropods by carrying out entomological sweepings at one of the study sites. Within the fecal samples, we identified dozens of prey species, belonging mainly to Araneae, Coleoptera, Diptera, Hymenoptera and …
Measurement of the Fluctuations in the Number of Muons in Extensive Air Showers with the Pierre Auger Observatory
2021
The successful installation, commissioning, and operation of the Pierre Auger Observatory would not have been possible without the strong commitment and effort from the technical and administrative staff in Malargue. We are very grateful to the following agencies and organizations for financial support: Argentina-Comision Nacional de Energia Atomica, Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT), Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Gobierno de la Provincia de Mendoza, Municipalidad de Malargue, NDM Holdings and Valle Las Lenas; in gratitude for their continuing cooperation over land access; Australia-the Australian Research Council; Brazil…
Platonism, intuition and the nature of mathematics
1988
Platonism is an essential aspect of mathematical method. Mathematicians are learned ability " t o l i v e " in the "world" of mathematical concepts. Here we have the main source of the creative power of mathematics, and of its surprising efficiency in natural sciences and technique. In this way, "living" (sometimes - for many years) in the "world"of their concepts and models, mathematicians are learned to draw a maximum of conclusions from a minimum of premises. Fixed system of basic principles is the distinguishing property of every mathematical theory. Mathematical model of some natural process or technical device is essentially a f i x e d m o d e l which can be investigated indepen…
Return of the Apex Predator : How Brown Trout (Salmo trutta) Re-Establishment Shapes an Ecosystem
2021
Re-establishment of a declined apex predator fish species in a lake ecosystem may have dramatic effects on other fish and plankton community already inhabiting the ecosystem. We studied mechanistically potential impacts of re-establishment of the brown trout (Salmo trutta) in the west-central European Lake Constance focusing on two commercially important fish species: whitefish and Eurasian perch. We compared simulation model outputs from two versions of an allometric trophic network model for Lake Constance, one with and one without the trout as the apex predator. The re-establishment of the declined brown trout reduced the perch population directly by predation and indirectly by increased…