Search results for "torium"
showing 10 items of 108 documents
Enceintes néolithiques de Bourgogne
2002
L'article fait le point sur les enceintes néolithiques identifiées dans les départements bourguignons, principalement Yonne et Côte d'Or. On dénombre ainsi environ 180 sites aménagés défensivement. En plaine, les enceintes privilégient l'installation le long des cours d'eau principaux (Yonne, Armançon, Serein, cours amont de la Saône), à la confluence avec un ru de moindre importance dont le bassin versant s'ouvre sur un "arrière pays" qui offre des opportunités d'échanges. Ainsi s'esquisse un modèle d'occupation du territoire qui débute avec le Cerny et qui évolue jusqu'au Néolithique récent.
Nuclear fission studies with the IGISOL method and JYFLTRAP
2015
there is no unique model or theory which describes all aspects of this phenomenon. Experimental measurements of nuclear fission product distributions still remains quite a challenging task for modern technologies. In the present work nuclear fission is studied from the radioactive ion beam production point of view. Some models suggest that the neutron-induced fission can be more favorable for production of neutron-rich nuclides than the proton-induced fission. The general idea of this thesis is to compare all aspects of both approaches in connection with the IGISOL method. A new technique to determine independent fission product yields was suggested for the comparison. This technique has be…
Data from: Symbiotic polydnavirus and venom reveal parasitoid to its hyperparasitoids
2018
Symbiotic relationships may provide organisms with key innovations that aid in the establishment of new niches. For example, during oviposition, some species of parasitoid wasps, whose larvae develop inside the bodies of other insects, inject polydnaviruses into their hosts. These symbiotic viruses disrupt host immune responses, allowing the parasitoid’s progeny to survive. Here, we show that symbiotic polydnaviruses also have a downside to the parasitoid’s progeny by initiating a multi-trophic chain of interactions that reveals the parasitoid larvae to their enemies. These enemies are hyperparasitoids that use the parasitoid progeny as host for their own offspring. We found that the virus …
Gas-phase chemistry, recoil source characterization and in-gas-cell resonance laser ionization of actinides at IGISOL
2018
The underlying theme of this thesis focuses on buffer gas purification and relevant gas-phase ion chemistry which critically affects ion beam purity at gas cell-based radioactive ion beam facilities. The achievement of attaining a sub- parts-per-billion level of impurity at the IGISOL facility has enabled subsequent gas cell developments for production of the actinide elements, plutonium and thorium, required for a program of high-resolution optical spectroscopy. Firstly, the construction and characterization of the new IGISOL buffer gas purification system is presented. Off-line ion beam production of plutonium and thorium using in-gas-cell laser resonance ionization combined with filament dispen…
Polsko-ukraińskie laboratorium ekologiczne
2010
Uczniowie Zespołu Szkół Elektrycznych nr 1 w Krakowie i studenci Państwowej Akademii Rolniczej w Połtawie biorą udział w projekcie edukacyjnym dla młodzieży z Polski i Ukrainy
Malignancy course of pituitary adenoma in MEN1 syndrome: Clinical-Neuroradiological signs
2020
Pituitary carcinomas (PCa) are extremely rare, indistinguishable from pituitary adenomas on histopathological grounds and have a poor prognosis. Most PCa start as PRL or ACTH secreting tumors in males, with relapsing invasive behaviour, refractoriness to medical and radiotherapy and increasing hormonal levels. The presence of distant metastases is still required for the diagnosis of PCa. The association with genetic endocrine diseases must be taken into account, since it adds further risk of evolution towards malignancy. Intradural spinal metastases have also been reported, so a complete craniospinal MR evaluation is recommended, when clinically indicated. We report a case of PCa, associate…
Sanatoriums in contemporary narratives : 'El mar', by Blai Bonet
2018
Literature and medicine are closely connected. Many works that portray experiences of disease have been set in health care facilities, including sanatoriums. Anti-tuberculosis sanatoriums, seen as spaces of isolation and as «death row» have inspired many authors. Twentieth-century novels devoted significant attention to these institutions which, kept far from the rest of society, conditioned both the life and the identity of the sick. The magic mountain by Thomas Mann and Rest home by Camilo José Cela are two outstanding references among these productions. In Catalan literature, El mar (The sea in its English language translation) by Majorcan author Blai Bonet must also be highlighted.
Trigeminal Meningioma in a Patient with Tardive Dyskinesia as Only Symptom
2018
Most meningiomas are benign, encapsulated tumors (95% of the cases), generally undergoing a limited number of genetic aberrations. We present the case of a 74-year-old patient with no significant pathological history, who is admitted to the neurology ward for orofacial dyskinesias accompanied by hypoesthesia in the left hemiface, a symptomatology that had started insidiously about two months before and worsened progressively over the past 3 weeks. A cerebral MRI was performed which revealed a small mass with discrete T2 hyperintensity and T1 iso-signal compared to the gray matter located in the left pontine cistern, with a large, well-defined base at the level of the cerebral tentorium. The…
Sex-specific effects of natural and sexual selection on the evolution of life span and ageing in Drosophila simulans
2014
Summary Variation in the strength of age-dependent natural selection shapes differences in ageing rates across species and populations. Likewise, sexual selection can promote divergent patterns of senescence across the sexes. However, the effects of these processes on the evolution of ageing have largely been considered independently, and interactions between them are poorly understood. We use experimental evolution to investigate how natural and sexual selection affect life span and ageing in Drosophila simulans. Replicate populations were evolved under lifetime monogamy (relaxed sexual selection) or lifetime polyandry (elevated sexual selection) and at one of two temperatures, 25 °C (rela…
Wspólna polityka rolna i jej kapitał instytucjonalny w ocenie użytkowników towarowych gospodarstw rolnych regionu opolskiego
2016
Po 10 latach obecności Polski w UE instrumenty Wspólnej Polityki Rolnej wzmocniły rozwój towarowych gospodarstw rolnych, przystosowały je do zarządzania funkcją środowiskową i zapoczątkowały adaptację do gospodarki opartej na wiedzy. Praca jest próbą odpowiedzi na pytanie o znaczenie WPR oraz jej otoczenia instytucjonalnego dla rozwoju towarowych gospodarstw rolnych i obszarów wiejskich regionu opolskiego. Analizowane są opinie i oceny kierowników tego typu gospodarstw zbierane metodą wywiadu kwestionariuszowego w gospodarstwach zlokalizowanych w gminach reprezentatywnych dla rolnictwa Opolszczyzny. Na podstawie badań z 2008 i 2014 r. stwierdzono, że dalsze procesy transformacyjne w rolnict…