Sökresultat

Aim: To study global patterns and temporal changes in the seasonal dynamics (quantity and seasonal distribution) of terrestrial gross carbon uptake in response to global environmental change. Location: Global. Time period: 2000–2016. Major taxa studied: Terrestrial ecosystems. Methods: Following a phenology-based definition of photosynthetic seasonality, we decompose gross primary production (GPP)

Popular Abstract in Swedish Magnetkameran är ett diagnostiskt instrument med vilket man kan ta skiktbilder av kroppen. Den började användas i sjukvården för drygt 20 år sedan och baseras på ett fysikaliskt fenomen som kallas för kärnmagnetisk resonans (MR). Detta innebär att vissa atomkärnor som placeras i ett starkt magnetfält kan avge en radiosignal när de utsätts för korta radiopulser. RadiosigContrast-enhanced magnetic resonance angiography (CE-MRA) is a diagnostic method for imaging of vascular structures based on nuclear magnetic resonance. Vascular enhancement is achieved by injection of a contrast medium (CM). Studies were performed using two different types of CM: conventional paramagnetic CM, and a new type of CM based on hyperpolarized (HP) nuclei. The effects of varying CM con

Many of society’s critical infrastructures, such as power supply, telecommunications, and transportation, have become increasingly interconnected. While this gives rise to increased efficiency, tighter connections also invites increased vulnerability and the risks of cascading failures. Moreover, at the same time as many of these vital systems have become increasingly dependent on one another, the

Research question: Is the experience of sense of coherence at one’s work influenced by creativity and other factors pertaining to different levels in the organization? Starting from a systems perspective, the leadership level, the work group level, as well as the level of the individual employee were investigated in two studies. Background: Based on empirical and theoretical work it is first propo

With their nanometer size cross-section and high aspect ratio, semiconducting nanowires have properties that make them promising as building blocks in future electronic and optoelectronic devices. Because of their small size, their optical and electrical properties can differ from their bulk counterparts, and their geometry allows for material combinations not accessible in thin films. Moreover, n

Øresund EcoMobility contributes to knowledge creation for sustainable transport and green logistics, city transport, and energy systems with a specific focus on the conditions and needs of the Øresund region. In this book, long distance goods transport and strategies for green corridors through the Øresund and Europe are studied, multi-criteria models for analysis in transport and infrastructural

Popular Abstract in Swedish Hantering av avlopp och avfall är en del av alla människors vardag. Vår hälsa och miljö påverkas av metoderna vi tillämpar för att ta hand om rester från hushåll och industrier. Genom teknikens utveckling används idag bakterier i vattenreningsverk där avloppsvatten renas från alla skadliga föremål och föreningar. Med hjälp av matematiska uttryck och analyser, i samspel Biofilms are compact, sessile microbial communities that attach to surfaces in aqueous environments. In wastewater treatment, they are especially important for removal of phosphorus and nitrogen, which, if released into a receiving water body, can cause severe eutrophication. Mathematical models of biofilms in wastewater are used to understand the underlying processes and to describe and analyze b

Tamoxifen (Tam) is widely used in chemotherapy of estrogen receptor-positive breast cancer. It inhibits proliferation and induces apoptosis of breast cancer cells by estrogen receptor-dependent modulation of gene expression, but recent reports have shown that Tam (especially at pharmacological concentrations) has also rapid nongenomic effects. Here we studied the mechanisms by which Tam exerts rap

OBJECTIVE: The aim of the present study was to analyze the long-term outcome of mid-clavicle fractures in adults and to evaluate the clinical importance of displacement and fracture comminution. DESIGN: Two hundred twenty-five mid-clavicular fractures that had been nonsurgically treated at Malmo University Hospital were retrospectively evaluated, both clinically and radiographically, an average of

Background: Endoscopic resection of T1 colon cancer (CC) is currently limited by guidelines related to risk of lymph node metastases. However, clinical outcome following endoscopic and surgical resection is poorly investigated. Method: A retrospective multicentre national cohort study was conducted on prospectively collected data from the Swedish colorectal cancer registry on all non-pedunculated

Today aromatic ring flipping has become a classic example to highlight the highly dynamic character of proteins. These dynamics occur when the aromatic side chains in phenylalanine and tyrosine turn 180o around its Cβ–Cγ axis, also known as its χ2 dihedral. Discovered in the 1970s’ these ring flippings are a common internal probe used in NMR spectroscopy to understand the protein interior dynamics

Peeking under the hood of bacteria Imagine you want to figure out what the different parts of your car do and essentially how important they are for it to function properly. The way to answer these questions could be to remove one part at a time and see what happens. In a similar way, whenever scientists want to better understand bacteria, they have learned different ways or techniques of doing s

Aim: The degree to which species' niches remain stable over space and time–the niche conservatism hypothesis–is critical for predicting species' responses to environmental change. Tests of this hypothesis typically focus on changes in niche centroids and boundaries. An outstanding question is whether species' environmental associations differ within the interior of their niche space–that is, acros

Carbon sequestration in arable soils is gaining increasing attention in global policymaking initiatives for climate-change mitigation. Large-scale assessments of soil organic carbon development in arable land are affected by the scarcity of reliable time series of soil organic carbon monitoring data and often fail to replicate observed trends or appreciate any effects induced by changes in soil ma

Background: Cyclic Cushing's syndrome (cCS) features fluctuating cortisol secretion, often causing diagnostic errors or delays, and possibly poorer outcomes. We aimed to identify unpublished cCS cases to characterise clinical challenges and guide strategies for improving outcomes by characterising cycle patterns, peak frequency, and evaluating complications. Methods: This was a retrospective obser

Denna studie undersöker hur mobilanvändning förhandlas icke-verbalt i livekonsertsammanhang och hur digitala teknologier omformulerar normer för närvaro, uppmärksamhet och social ordning i fysiska offentliga rum. Trots mobiltelefonens synlighet i samtidens vardagsliv har tidigare forskning inom medie- och kommunikationsvetenskap främst fokuserat på digitala plattformar och medierat innehåll, snaraThis study examines how smartphone use is negotiated in live concert settings and how digital technologies reshape norms of presence, attention, and social order in physical public spaces. While smartphones are highly visible in contemporary everyday life, previous research within media and communication studies has primarily focused on digital platforms, technological affordances, or mediated con

A Holocene sediment sequence from Lake Igelsjon, south central Sweden, was studied by stable oxygen- and carbon-isotope analyses of different carbonate components. The deposit, which covers the time-span from ca 11,500 cal BP to the present, was laid down in a small, kettle-hole lake, the hydrological balance of which is presently dominated by groundwater flow. Isotopic records obtained on bulk ca

In this study, we modeled the aerosol particle formation along air mass trajectories arriving at the remote Arctic research stations Gruvebadet (67 m a.s.l.) and Zeppelin (474 m a.s.l.), Ny-Ålesund, during May 2018. The aim of this study was to improve our understanding of processes governing secondary aerosol formation in remote Arctic marine environments. We run the Lagrangian chemistry transpor

Background: Pressure–volume (PV) loops provide comprehensive information of cardiac function, but commonly implies an invasive procedure under general anesthesia. A novel technique has made it possible to non-invasively estimate PV loops with cardiac magnetic resonance (CMR) and brachial pressure which would enable good volume estimation of often anatomically complex ventricles without the need of

Precipitation, as an important component of the Earth’s water cycle, plays a determinant role in various socio-economic practices. Consequently, having access to high-quality and reliable precipitation datasets is highly demanded. Although Gridded Precipitation Products (GPPs) have been widely employed in different applications, the lack of quantitative assessment of GPPs is a critical concern tha