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Populärvetenskaplig sammanfattning: Av jordens yta är ca 30 % täckt av skog och mer än 80 % av allt kol inbundet ovan mark återfinns i skogens växtlighet. Skogen är kopplad till atmosfären genomflöden av bland annat energi, vatten och koldioxid. Hur skogen brukas kan därför påverka klimatförändringen. När skog avverkas tas det mesta av det inbundna kolet ovan mark bort. Kvar är resterna från avverForests have a large role in the global carbon cycle. Forest management could play a crucial role in mitigating climate change. With a growing demand for renewable energy the forest could contribute. Stumps are one of the potential energy sources from the forest. In this study a pine dominated clear-cut area was surveyed in regard of stump biomass, carbon fluxes and carbon (C) and nitrogen (N) sto

Populärvetenskaplig sammanfattning Kortfattat kan en dator beskrivas som en räknemaskin; i en dator är enheten som utför beräkningarna processorn. I en kvantdator är det enskilda atomer som är ansvariga för beräkningarna. På atomnivå, mikrokosmos, råder andra lagar än i makrokosmos. Dessa lagar sammanfattas i vad som kallas för kvantmekanik. Ett kvantmekaniskt fenomen som utnyttjas i en kvantdatorAn approach to the construction of high-frequency radiocircuits for ex- tending coherence-times in the Rare-Earth quantum computation scheme is presented, along with results from computer simulation of the radiofre- quency circuit using a program called QUCS. The results were experi- mentally verified and showed good correspondence with theory and sim- ulations. Problems to take into consideration

In northern Europe, tick-borne diseases such as Lyme borreliosis (LB) and tick-borne encephalitis (TBE) are well known. The actual incidence of Babesia infections, however, has remained elusive. In this study, the prevalence of antibodies against two Babesia spp. was investigated in a cohort of patients that were seropositive for Borrelia (B.) burgdorferi sensu lato (s.l.). Data were compared to a

Commenting on Eco's papers about fakes, I claimed that what is meant by a fake depends on what is taken to be the original, and this, in turn, revolves around the relation between type and token. As observed by Prieto and Grice, a sign, apart from the content it conveys, also carries a message informing us that it is a sign. The scare crow is a sign to the addresser, but not, ideally, to the addre

The use of variable-length genomes in evolutionary computation has applications in optimisation when the size of the search space is unknown, and provides a unique environment to study the evolutionary dynamics of genome structure. Here, we revisit crossover for linear genomes of variable length, identifying two crucial attributes of successful recombination algorithms: the ability to retain homol

Deep eutectic solvents have shown the ability to promote the self-assembly of surfactants in solution. However, some differences have been found compared with self-assembly in pure water and other polar organic solvents. The behaviour of alkyltrimethylammonium bromides in choline chloride:glycerol deep eutectic solvent has been studied by means of surface tension, X-ray and neutron reflectivity an

Osteoarthritis (OA) is a common chronic disease, causing joint pain and reduced physical function. OA progresses slowly over a period of several years; to avoid an exacerbation of symptoms, it is critical to able to diagnose the disease as early as possible. The identification of disease-specific biomarkers may enable such an early diagnosis. The aim of this study was to investigate potential biom

Objective: The objective of this study was to examine the associations between socioeconomic/Occupational factors and histologic subtypes of leukemia. Methods: The Swedish Family-Cancer Database was used to calculate standardized incidence ratios for different social classes and occupational groups. Results: The overall standardized incidence ratio was close to unity between different socioeconomi

Amyloid plaques and neurofibrillary tangles (NFTs) in the brain are the neuropathological hallmarks of Alzheimer's disease (AD). Amyloid plaques are composed of β-amyloid peptides (Aβ), while NFTs contain hyperphosphorylated tau proteins. Patients with familial AD who have mutations in the amyloid precursor protein (APP) gene have either increased production of Aβ or generate more aggregation-pron

Dietary sphingomyelin (SM) undergoes sequential cleavage to ceramide and sphingosine in the intestine. A distinctive intestinal sphingomyelinase (SMase) with alkaline pH-optimum was earlier identified by us. The activity was highest in middle and lower small intestine, but its role in SM digestion has not been clarified. In this study we examined the extension and capacity of SM digestion in vivo.

Ceramide plays an important role in regulating cell proliferation and apoptosis. Recent studies indicate that generation of ceramide in the intestine from sphingomyelin hydrolysis may be implicated in colon cancer development. The enzymes that catalyze the further hydrolysis of ceramide in the intestine have, however, not been well investigated. Our data reveal the existence of a ceramidase (EC 3.

A precise determination of the local dark matter density and an accurate control over the corresponding uncertainties are of paramount importance for dark matter (DM) searches. Using very recent high-resolution numerical simulations of a Milky Way like object, we study the systematic uncertainties that affect the determination of the local dark matter density based on dynamical measurements in the