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During migration birds are exposed to several challenges, one of these are the potential threat of getting oxidative stressed. Oxidative stress can be defined as when free radicals are produced in a vastly amount so antioxidants cannot detoxify them. This is the case at higher metabolic rate such as migratory flight, and probably during hyperphagia at stop-over. The aim of this paper was to invest

Antibiotika är en av de viktigaste upptäckterna under 1900-talet. Med antibiotika blev det möjligt att bekämpa och förhindra bakteriella infektioner. Ett växande och svårlöst problem är antibiotikaresistans. Detta projekt syftar till att hitta alternativ till klassisk antibiotika. Vi har arbetat med sialinsyra, en kolhydrat som återfinns på cellytan. De flesta bakterier tillverkar inte själva siaThe development and the use of anibiotics since the second half of XX century really affected the approach on treatment and prevention of infectious diseases. Despite a lot of resources and energies has been invested on the research, antibiotics resistance is a growing phenomenon in the last years. Today this problem has become a real public health priority worldwide, not only for the important cl

Att dika skogar till förmån för bland annat bättre tillväxt kan påverka och förändra faktorer som marktemperatur och markfuktighet vilka är de viktigaste faktorerna för markrespirationen och flödet av koldioxid till atmosfären. Markrespirationen svarar för huvuddelen av koldioxidflödet till atmosfären från ett markbundet ekosystem. Koldioxid är en viktig växthusgas och små förändringar av flödet kDitching forests in favor of for example better tree growth can affect and change factors such as soil temperature and soil moisture. Those are the most important factors for soil respiration and the flow of carbon dioxide (CO2) into the atmosphere. The soil respiration accounts for the major flux of CO2 to the atmosphere from the terrestrial ecosystem. CO2 is an important greenhouse gas and small

Grönlands inlandsis utgör världens näst största färskvattensreservoar. Forskning har visat att Grönlands inlandsis förlorar mer och mer massa, vilket också bidrar till den stigande havsnivån, i kombination med andra faktorer. Avrinningen förväntas också öka i framtiden på grund av den globala uppvärmningen. Hur mycket massa som lämnar Grönlands inlandsis beror på den totala massbalansen. Den totalThe Greenland Ice sheet (GIS) is the second largest ice sheet on Earth and thus stores a large amount of Earths freshwater. Because of climate change and the Arctic amplification, GIS is experiencing changes and increased melt rates. The total mass budget determines the amount of sea level rise caused by input from freshwater from the GIS. Surface mass balance (SMB) plus the dynamic mass losses fr

Glacier advances in the Écrins massif (French Alps) during the Late Glacial and the Early Holocene are poorly constrained. Based on field observations, a high-resolution digital elevation model and an orthophoto, glacial landforms in the upper Drac Blanc catchment were mapped. Thanks to 42 new 10Be exposure ages, the timing of the stabilisation of selected moraines was constrained. The application

Denna studie undersöker den politiska och allmänna diskurs som konstruerar identiteten landsbygdsbo i Sverige, samt vilka konsekvenser denna diskurs har gällande förväntningar på, och förväntningar hos boende i rurala regioner i Sverige. Studien fokuserar på stängningen av Sollefteå BB i Sollefteå sjukhus, Västernorrlands landsting (numera region), i januari 2017 och den ockupation av sjukhuset soThis study examines the political and popular discourse that constructs the identity of the rural citizen in Sweden, and what consequences this discourse has on expectations on, and expectations of rural citizens in Sweden. The study focuses on the closing of the birthing clinic in Sollefteå hospital, Västernorrland county, in January 2017 and the occupation of the ward that followed thereafter. E

Minskade koldioxidutsläpp från energisektorn är nödvändigt om Sverige ska kunna nå klimatmålet inga net- toutsläpp av växthusgaser senast 2045. Biobaserad kraftvärme som drivs på restprodukter från skogsindustrin har möjligheten att bidra till minskade utsläpp men bränslena måste vara miljömässigt hållbara. Detta arbete undersöker potentialen för ett ökat uttag av grot, grenar och toppar, från sveReducing carbon dioxide emissions from the energy sector is essential if Sweden is to achieve its climate target of net-zero greenhouse gas emissions by 2045. Bio-based combined heat and power (CHP), fueled by residual products from the forest industry, has the potential to contribute to reduced emissions but only with enough fuel that’s environmentally sustainable. This study investigates the pot

More than half of the world's population today lives in urban areas, and the relationship between the city and the sea has always played a central role. Studies show that access to waterfront environments in port cities historically been limited, but as urban development progresses, the coastline is gaining increasing significance in the urban context. This presents both opportunities and chal

MORC2 (Microorchidia CW type Zinc Finger protein 2) is a GHKL (gyrase, heat shock protein 90, histidine kinase, MutL) ATPase involved in chromatin remodeling and is highly conserved in eukaryotes. Mutations in the ATPase domain of MORC2 are known to cause neurodevelopmental disorders. MORC2 is recruited by the HUSH complex to target long, intronless transcription units such as LINE-1 retrotranspos

Background: Estrogen receptor alpha (ERα) is a protein that belongs to the nuclear receptor family. It is regulating the expression of genes involved in cell cycle progression, proliferation, and apoptosis. Approximately 75% of breast cancers express ERα, making it an important target for treatment. Researchers have identified various isoforms of ERα, with the most well-characterized one being a 6

This thesis investigates how AI-generated music challenges traditional systems of cultural legitimacy, identity, and musical taste. Drawing on Bourdieu’s theory of cultural fields and symbolic capital, and supplemented by Simon Frith’s insights into authenticity and identity performance, the study examines how emerging technologies reconfigure creative authority within platform-driven environments

Volcanic eruptions can have severe societal and environmental impacts as shown by ash dispersal and sulphur emissions from recent Icelandic eruptions. However, ice-core sulphur records demonstrate that these events were minor as compared to eruptions of much larger magnitude in recent centuries, with severe implications for past society documented in historical records. Biological and chemical evi

There is a global concern about the decline of wild pollinators and the ecosystem services they provide. Although land-use change is a major threat to biodiversity, it is still poorly understood how land-use heterogeneity (or land-use structure) impacts pollinator communities and entomophilous crop production. Based on a literature review, we performed a meta-analysis to (1) assess how landscape s

Determining the appropriate duration for traffic conflict observation remains a critical yet unresolved challenge in road safety analysis. Existing approaches lack a quantitative approach to determine adequate sample sizes for general conflict-based applications. This study addresses this gap by proposing an extreme value theory based framework to determine appropriate observation durations, based

The sperm whale (Physeter macrocephalus) is a cosmopolitan species with a broad distribution that ranges from the tropics to the poles. Males are known to migrate between nutrient-rich high latitude waters and low latitude breeding grounds. In the North Atlantic, large males are found up to the southern limits of the ice edge. However, their seasonal distribution patterns remain poorly known in th

When installing new research equipment at the synchrotron research laboratory MAX IV, a final positional accuracy of tens of microns is usually needed. To obtain that accuracy, initial reference points must be placed within 2 mm from the nominal target points in CAD, in a process referred to as bluelining. It is currently a manual process where points from a virtual environment are transferred to