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On the importance of life history and age structure in biological invasions

The age specific patterns of reproduction and mortality dictated by the life history of an organism apply to potential invaders as well as resident species of an area, but whether certain life history traits are more invasive than others is an unresolved issue. We analyze a two-population system of an invading and a resident species and test the effects of age on the probability to invade when the

Overextension in Verb Conjunctions

Hampton (1988) discovered that people are subject to overextension they categorize some things as falling under a conjunction (e.g., they categorize chess as a sport which is also a game) but not as falling under both of the corresponding conjuncts they do not categorize chess as a sport). Although subsequent literature has replicated this effect with a wider range of constructions than those orig

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Abstract in French L'auteur suggére une série d'études comparatives qui traitent de la perception des pirogues à balancier, et qui visent à mieux cerner les rapports existant entre les relations sociales, la biodiversité et le développement durable dans les sociétés océaniennes des petites îles et des zones côtières exposées à de rapides mutations culturelles. Après avoir critique l'idée récente s

Influence of Different Rim Widths and Blowing Ratios on Film Cooling Characteristics for a Blade Tip

Three-dimensional simulations of the squealer tip on the GE-E-3 blade with eight film cooling holes were carried out. The effect of the rim width and the blowing ratio on the blade tip flow and cooling performance were revealed. Numerical simulations were performed to predict the leakage flow and the tip heat transfer with the k-epsilon model. For the squealer tip, the depth of the cavity is fixed

Impact origin for the Hummeln structure (Sweden) and its link to the Ordovician disruption of the L chondrite parent body

Several studies of meteorites show that a large disruption of an asteroid occurred ca. 470 Ma in our solar system's asteroid belt. As a consequence, a large number of meteorite impacts occurred on Earth during the following few million years. The finding and characterization, for the first time, of planar deformation features in quartz grains from rocks collected at the Middle Ordovician Hummeln s

Targeting T cell migration in inflammatory bowel disease.

Crohn's disease and ulcerative colitis are chronic inflammatory disorders of the gastrointestinal tract, and are collectively referred to as inflammatory bowel disease (IBD). IBD is a major cause of lifetime morbidity, has a severe impact on quality of life of patients (equivalent to that of rheumatoid arthritis, asthma, migraine, or diabetes) and constitutes a substantial economic burden to the h

Analyzing Social Ties in Total Institutions

A common view is that an individual delinquent can be rehabilitated in a “home” in the countryside, away from his or her original urban social ties. An ironic result is new social ties with other juvenile delinquents as they spend a considerable amount of time together at a secluded institution. Drawing on ethnographic studies in residential care institutions, this article discusses two aspects to

Sampling and Characterization of Sub-Micrometer High-Temperature Particles Present in the Product Gas from a Circulating Fluidized-Bed Biomass Gasifier

The removal of particulate fine fractions by a proper high-temperature cleaning device is a very important issue in the development of the biorefinery concept. Therefore, in this investigation, particles from a 100 kW(th) steam-O-2 blown circulating fluidized-bed (CFB) gasifier were sampled and characterized. The sampling was performed with a specially designed heated dilution probe downstream of

A multi-disciplinary education process related to the discharging of children from hospital when the child has been diagnosed with type 1 diabetes - a qualitative study

Background: Worldwide, insulin-dependent type 1 diabetes is one of the most frequently diagnosed long-term endocrine disorders found in children and the incidences of this diseased is still increasing. In Sweden the routines are, according to national guidelines, when the child is diagnosed with type 1 diabetes, the child and its family remains at the hospital for about two weeks. There is limited

Digitala pengar : Nya villkor i det sociala livet

It has often been argued that money and modern monetary economies have occasioned a comprehensive rationalisation of society. Money has often been viewed as being socially destructive, while it is said that the modern monetary economy has had inescapable consequences for society, culture, and people’s daily lives. This thesis considers the introduction of computerised systems for handling digital

Common Genetic Variation at BARD1 Is Not Associated with Breast Cancer Risk in BRCA1 or BRCA2 Mutation Carriers

Background: Inherited BRCA1 and BRCA2 (BRCA1/2) mutations confer elevated breast cancer risk. Knowledge of factors that can improve breast cancer risk assessment in BRCA1/2 mutation carriers may improve personalized cancer prevention strategies. Methods: A cohort of 5,546 BRCA1 and 2,865 BRCA2 mutation carriers was used to evaluate risk of breast cancer associated with BARD1 Cys557Ser. In a second

Food sources of early colonising arthropods: The importance of allochthonous input

Arthropod predators and detritivores are among the first colonisers on land surfaces undergoing primary succession. In the absence of higher plants and herbivores, they may either have an allochthonous food source (i.e. of geographically distant origin) or local food source that is sustained by e.g. microorganisms. By studying spiders and collembolans on sites along chronosequences on recently eme

Ovealmbornia reginae (Teloschistaceae, Ascomycetes), a new xanthorioid lichen from South Africa

A new species, Ovealmbornia reginae from South Africa, is described, illustrated and compared with related species. A combined phylogenetic data set based on ITS and 28S nrLSU and 12S mtSSU sequences of the genera in the Dufourea clade is provided, (i. e. the genera Dufourea, Jackelixia, Langeottia, Ovealmbornia and Xanthokarrooa). Corrections of GenBank data for the genus Ovealmbornia and a key t

Aromatic polymers incorporating bis-N-spirocyclic quaternary ammonium moieties for anion-exchange membranes

We have prepared and studied a new class of anion conducting membrane materials functionalized with N-spirocyclic quaternary ammonium (QA) cations formed via cyclo-quaternization reactions involving pyrrolidine, piperidine and azepane, respectively. These groups were introduced in pairs, adjoined through fused phenyl rings along poly(arylene ether sulfone) backbones. Despite their bulkiness, the b

Dynamic ultra-high pressure homogenisation of whey protein-depleted milk concentrate

Effects of dynamic ultra-high pressure homogenisation (UHPH) on the micro-and macrostructure of whey protein-depleted milk concentrate solutions with different mineral concentrations (5.0, 7.5, 10.0%, w/w), pH (5.8, 6.2, 6.6) and amount of added sodium chloride (0, 1.5, 3.0%, w/w) were investigated. Significantly increased viscosity was observed in samples at pH 5.8 without added NaCl and with UHP

Novel innate immune functions of saliva

The innate immune system in humans has succeeded in developing numerous mechanisms against the injurious effects of bacteria, along with their toxins as a result of several thousand years of co-evolution. The oral mucosal surface represents such a unique environment, where despite being constantly exposed to microbes and their products, overt infection and damage is a rarity. An important componen