Sökresultat
Filtrera
Filtyp
Din sökning på "*" gav 533512 sökträffar
Development and evaluation of a computer-based educational program for adults with congenitally malformed hearts
Background: There is a lack o educational material for adults with congenitally malformed hearts. Computer-based education has shown to have significant effects on knowledge and management of chronic diseases. Aim: The aim of this study was to develop and evaluate a computer-based educational program for adults with congenitally malformed hearts. Methods: The program was developed by a multidiscip
An Efficient State Recovery Attack on the X-FCSR Family of Stream Ciphers
We describe a state recovery attack on the X-FCSR family of stream ciphers. In this attack we analyse each block of output keystream and try to solve for the state. The solver will succeed when a number of state conditions are satisfied. For X-FCSR-256, our best attack has a computational complexity of only 2^{4.7} table lookups per block of keystream, with an expected 2^{44.3} such blocks before
A winning strategy? The employment of women and firm longevity during industrialisation
Why do certain firms prosper and grow old while other firms fail? Established knowledge tells us that longevity is related to the firm's ability to adapt to market conditions, through product diversification, learning-by-doing and adopting new strategies regarding technology, human resources and management. By estimating duration models using new data covering the entire Swedish tobacco industry,
How a world came to be
Variants at chromosome 20 (ASIP locus) and melanoma risk
Agouti signaling protein (ASIP) locus on chromosome 20q11 is implicated, as shown by genome-wide association studies, in phenotype variation and melanoma risk. We genotyped 837 melanoma cases and 1,154 controls for 21 single nucleotide polymorphisms (SNPs) informative for 495 polymorphisms at the locus. Our data showed an increased risk of melanoma (odds ratio [OR] 1.27, 95% confidence interval [9
Nationalized incumbents and regional challengers: Opposition- and incumbent-party nationalization in Africa
The African party literature, especially research prescribing to the long-dominant ethnic voting thesis, has asserted that African party systems exhibit low levels of party nationalization. However, systematic research on nationalization across parties and party systems is still lacking. This study argues that the prospects for building nationalized parties vary substantially between incumbent and
High total carbon dioxide predicts 1-year readmission and death in patients with acute dyspnea.
Patients with acute dyspnea are a large heterogeneous patient group where initial management is important for outcome.
Design and Synthesis of P1-P3 Macrocyclic Tertiary-Alcohol-Comprising HIV-1 Protease Inhibitors
To study P1-P3 macrocyclizations of previously reported tertiary-alcohol-comprising HIV-1 protease inhibitors (PIs), three new 14- and 15-member macrocyclic PIs were designed, synthesized by ring-closing metathesis, and evaluated alongside with 10 novel linear PIs. Cocrystallized complexes of the macrocyclic PIs and the HIV-1 protease are presented, analyzed, and discussed. The macrocyclic structu
Low birthweight is associated with an increased risk of LADA and type 2 diabetes: results from a Swedish case-control study
Aims/hypothesis Our aim was to investigate the association between birthweight and latent autoimmune diabetes in adults (LADA), a common diabetes form with features of both type 1 and type 2 diabetes. Methods We used data from the Epidemiological Study of Risk Factors for LADA and Type 2 Diabetes (ESTRID), a Swedish population-based study. Eligible for the analysis were 134 incident LADA cases (gl
Posterior approach and uncemented stems increases the risk of reoperation after hemiarthroplasties in elderly hip fracture patients.
Background Hemiarthroplasties are performed in great numbers worldwide but are seldom registered on a national basis. Our aim was to identify risk factors for reoperation after fracture-related hemiarthroplasty in Norway and Sweden. Material and methods A common dataset was created based on the Norwegian Hip Fracture Register and the Swedish Hip Arthroplasty Register. 33,205 hip fractures in indiv
Investigating the synergistic efficacy of BMP-7 and zoledronate on bone allografts using an open rat osteotomy model.
Bone grafts are well-established in the treatment of fracture non-unions but union is still not always achieved. Harvesting autograft is associated with donor site morbidity and the available amount of bone is limited. Allograft is more easily obtained and available in greater quantities but lacks the osteoinductive characteristics of autograft. We have previously shown a synergistic effect of bon
Self-catalyzed MBE grown GaAs/GaAsxSb1-x core-shell nanowires in ZB and WZ crystal structures
We have investigated the growth of self-catalyzed GaAs/GaAsxSb1-x core-shell nanowires directly on Si(111) substrates by molecular beam epitaxy. The compositions of the GaAsxSb1-x shells are tuned in a wide range where the Sb-content is varied from 10 to similar to 70%, covering the miscibility gap. In addition, the GaAsxSb1-x shells are grown on both zinc blende (ZB) and wurtzite (WZ) crystal str
Fleeing towards death - leech-induced behavioural defences increase freshwater snail susceptibility to predatory fish
Prey species are often exposed to multiple predators, which presents several difficulties to prey species. This is especially true when the response to one predator influences the preys susceptibility to other predators. Predator-induced defences have evolved in a wide range of prey species, and experiments involving predators with different hunting strategies allow researchers to evaluate how pre
Short-term exercise-induced improvements in bone properties are for the most part not maintained during aging in hamsters.
Physical exercise during growth affects composition, structure and mechanical properties of bone. In this study we investigated whether the beneficial effects of exercise during the early growth phase have long-lasting effects or not. Female Syrian golden hamsters (total n=152) were used in this study. Half of the hamsters had access to running wheels during their rapid growth phase (from 1 to 3mo
Enhanced airway smooth muscle cell thromboxane receptor signaling via activation of JNK MAPK and extracellular calcium influx.
Thromboxane is a key inflammatory mediator and potent airway constrictor. It acts on thromboxane A(2) (TP) receptors and contributes to airway inflammation and airway hyperresponsiveness that is the characteristic feature of asthma. The present study was designed to study TP receptor signaling in airway smooth muscle cells by using an organ culture model and a set of selective pharmacological inhi
High zooplankton diversity in the extreme environments of the McMurdo Dry Valley lakes, Antarctica
The McMurdo Dry Valley lakes of Antarctica constitute some of the harshest and most isolated freshwater environments on Earth which might be expected to limit the biogeographical expansion of many organisms. Despite this, we found that the biodiversity of rotifer zooplankton is the highest ever recorded on the Antarctic mainland. We identified in total nine rotifer taxa, of which six are new to th
Rapid X-ray photoreduction of dimetal-oxygen cofactors in ribonucleotide reductase.
Prototypic dinuclear metal cofactors with varying metallation constitute a class of O2-activating catalysts in numerous enzymes such as ribonucleotide reductase (RNR1). Reliable structures are required to unravel the reaction mechanisms. However, protein crystallography data may be compromised by X-ray photoreduction (XPR). We studied XPR of Fe(III)Fe(III) and Mn(III)Fe(III) sites in the R2 subuni
Return Migration in Later Life: International Perspectives
Methods for the preparation of chlorophyllide a: an intermediate of the chlorophyll biosynthetic pathway
Chlorophyllide a is a metabolite late in the biosynthesis of chlorophylls and bacteriochlorophylls. Isolation procedures for chlorophyllide a from Rhodobacter capsulatus CB1200 and barley (Hordeum vulgare L.) are described and compared. R. capsulatus CB1200 is a double mutant in the bacteriochlorophyllide a biosynthetic pathway, and chlorophyllide a is excreted by the cells when grown in Tween 80-