Search results for " Migration"
showing 10 items of 754 documents
The global economic crisis as a critical Juncture? The crisis's impact on migration movements and policies in Europe and the US
2016
The current global economic crisis has resulted in the strongest recession in the Organisation for Economic Cooperation and Development (OECD) countries since the Great Depression in the early 1930s and the 1970s oil shocks. This special issue sets out to explore how the most recent economic crisis impacted immigration and immigration-related policy in the United States of America and in European countries that are part of the OECD. The crisis of the late 2000s was offset by the collapse of the subprime US housing market, destabilising the financial system and leading to a sovereign debt crisis. The shock was marked by a “sudden […] deterioration of most, or all, key macroeconomic indicator…
Standardization of sperm motility analysis by using CASA-Mot for Atlantic salmon (Salmo salar), European eel (Anguilla anguilla) and Siberian sturgeo…
2019
[EN] It is essential to define an optimized standard method to assess the fish sperm quality to minimize the differences between the results obtained by different laboratories. Only this optimization and standardization can make them useful from academia to industry. This study presents the validation of sperm motility assessment using a CASA-Mot system for three endangered diadromous fish species: European eel (Anguilla anguilla), Atlantic salmon (Salmo salar) and Siberian sturgeon (Acipenser baerii). To attain this goal, different technical and data processing methods were tested: 1) magnification lens (×10 and ×20), 2) Spermtrack® reusable chambers (10 and 20¿¿m depth) and 3) different f…
Heat shock factor 2 is a stress-responsive mediator of neuronal migration defects in models of fetal alcohol syndrome
2014
Fetal alcohol spectrum disorder (FASD) is a frequent cause of mental retardation. However, the molecular mechanisms underlying brain development defects induced by maternal alcohol consumption during pregnancy are unclear. We used normal and Hsf2-deficient mice and cell systems to uncover a pivotal role for heat shock factor 2 (HSF2) in radial neuronal migration defects in the cortex, a hallmark of fetal alcohol exposure. Upon fetal alcohol exposure, HSF2 is essential for the triggering of HSF1 activation, which is accompanied by distinctive post-translational modifications, and HSF2 steers the formation of atypical alcohol-specific HSF1–HSF2 heterocomplexes. This perturbs the in vivo bindi…
Contribution à la connaissance de l'implantation Burgonde en Gaule au Ve siècle : à propos de découvertes récentes de fibules zoomorphes
2011
The recent discovery of three horse shaped fibulae – a pair with a cavalryman from Ecrille in the Jura and a fibula from the La Chambre sector in Savoie as well as a bird shaped fibula from Charpey in the Drome, all dating from the second half of the 5th century or around 500 AD, provide valuable references in the context of the Burgundian settlement in the Centre-East and the South-East of Gaul. The map is still incomplete notably for the area to the south of Lyon, precisely where La Chambre and Charpey are located. Relating to the Ecrille discovery, it provides new information in relation to this defended site underlining its importance.
Migracje absolwentów szkół wyższych a kształtowanie się kapitału ludzkiego w województwie opolskim
2019
Województwo opolskie to region silnie zdeterminowany demograficznie szczególnie procesami migracyjnymi o różnorodnych implikacjach społecznych i ekonomicznych. Intensywne migracje obok dywersyfikacji etnicznej ludności składają się na specyfikę regionu i powodują, że problemy związane z ruchem wędrówkowym nabierają istotnego znaczenia w kontekście jego dalszego rozwoju. Kapitał ludzki zarówno w wymiarze ilościowym, jak i jakościowym stanowi kluczowy endogeniczny czynnik rozwoju każdego obszaru decydujący o jego potencjale rozwojowym, dlatego też stały odpływ dobrze wykwalifikowanej kadry – absolwentów szkół wyższych za granicę, który obserwujemy nie tylko w regionie, ale również w całym kra…
(Un)framing Lampedusa: Regimes of Visibility and the Politics of Affect in Italian Media Representations
2017
The 3rd of October 2013 more than 300 migrants died after a boat sank off the coasts of Lampedusa. This probably was the most dramatic shipwreck ever happened in the Mediterranean, and certainly the one which attracted the most media attention in Italy and elsewhere. Since at least 1992 the Mediterranean has become the unstable ground where the dominant policies of regulated mobility and discontinuous surveillance are continuously challenged by bodies which struggle for their fundamental right to move. This conflict between global regimes of disciplined mobility (Philo 2014) and singular forms of embodied resistance (Agamben 1990) involves also the field of representation and its forcible e…
Transcontinental 2200 km migration of a Nathusius’ pipistrelle (Pipistrellus nathusii) across Europe
2021
A male Pipistrellus nathusii ringed in Pape Natural Park (S Latvia) in August 2015 was recovered recently dead in Pitillas’ Lagoon Natural Reserve (N Spain) in March 2017. At 2224 km in SSW direction, this is the first documented bat migration between these countries and worldwide the longest migration record of a bat. We also report other observations of this species in autumn in Northern Spain, suggesting that the Iberian Peninsula may be an important wintering area for Nathusius’ pipistrelles. Conservation measures should be agreed on by countries along the migration routes to improve the protection of this species. nonPeerReviewed
Fructose 2,6-bisphosphate as a signal for changing from sugar to lipid oxidation during flight in locusts
1986
AbstractFlight in locusts is initially powered mainly by carbohydrate but if flight is to be sustained, as in migration, the animals have to utilize fat as the predominant fuel. The molecular basis of this metabolic switch has not been identified. Fructose 2,6-bisphosphate is a potent activator of 6-phosphofructokinase (EC 2.7.1.11) purified from locust flight muscle. After the first few minutes of flight in the locust the concentration of fructose 2,6-bisphosphate in the flight muscle falls dramatically, which should lead to a decrease in the activity of 6-phosphofructokinase as part of the mechanism to conserve carbohydrate during prolonged flight.
Notch and Numb are required for normal migration of peripheral glia in Drosophila
2006
Abstract A prominent feature of glial cells is their ability to migrate along axons to finally wrap and insulate them. In the embryonic Drosophila PNS, most glial cells are born in the CNS and have to migrate to reach their final destinations. To understand how migration of the peripheral glia is regulated, we have conducted a genetic screen looking for mutants that disrupt the normal glial pattern. Here we present an analysis of two of these mutants: Notch and numb. Complete loss of Notch function leads to an increase in the number of glial cells. Embryos hemizygous for the weak NotchB-8X allele display an irregular migration phenotype and mutant glial cells show an increased formation of …