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I review formation channels for blue stragglers. I consider how they may be produced via collisions between two single main-sequence stars, or via collisions during encounters involving binary stars. Further, I discuss how blue stragglers may be produced via the evolution of isolated binaries. Observations of globular clusters suggest that both mechanisms are contributing.
Familial risks of lung cancer are well-established, but whether lung cancer clusters with other discordant cancers is less certain, particularly beyond smoking-related sites, which may provide evidence on genetic contributions to lung cancer aetiology. We used a novel approach to search for familial associations in the Swedish Family-Cancer Database. This involved assessment of familial relative r
Over the last decade, attention to agricultural development in less developed countries has increased. However, two opposing views on its role in economic development exist within the scholarly debate, either as a potential engine for economic growth or as a fifth wheel unlikely to generate transformative growth. Taking these contrary opinions as a point of departure, this paper reviews the origin
To sample information optimally, sensory systems must adapt to the ecological demands of each animal species. These adaptations can occur peripherally, in the anatomical structures of sensory organs and their receptors; and centrally, as higher-order neural processing in the brain. While a rich body of investigations has focused on peripheral adaptations, our understanding is sparse when it comes
In 2015 the European Society of Cardiology and European Respiratory Society published new guidelines on the diagnosis and treatment of pulmonary hypertension (PH). PH due to lung diseases and/ or hypoxia was classified as a separate entity. PH is common in lung diseases, but seldom severe. Nevertheless, the presence of PH in a patient with lung disease is associated with worse outcome. If there is
OBJECTIVE: To investigate the possible association between severity of intellectual disability (ID) and presence of challenging behavior, respectively, on diagnoses of psychiatric disorders among older people with ID.METHODS: People with a diagnosis of ID in inpatient or specialist outpatient care in 2002-2012 were identified (n = 2147; 611 with mild ID, 285 with moderate ID, 255 with severe or pr
Pheromone receptors (PRs) are essential in moths to detect sex pheromones for mate finding. However, it remainsunknown from which ancestral proteins these specialized receptors arose. The oldest lineages of moths, so-callednon-ditrysian moths, use short-chain pheromone components, secondary alcohols, or ketones, so called Type 0 pheromonesthat are similar to many common plant volatiles. It is, the
Previous research has not been conclusive regarding the association between selenium (Se) and breast cancer. This study was conducted to clarify if there is an association between prediagnostic serum Se levels and breast cancer risk. A population based cohort, the Malmö Diet and Cancer Study, was used and linked with the Swedish cancer registry up to 31 December 2013. Our study included 1,186 wome
The purpose of the following essay is to give a broad outline of the Indian agricultural development and to relate this to two norms of development: growth and distributive justice. Distributive justice is in this context not to be understood as a question of absolute economic equality but should be understood in a broader sense, namely, a relatively egalitarian distribution of incomes and product
Background: Axillary staging in patients with breast cancer and clinically node-negative disease is performed by sentinel node biopsy (SLNB). The aim of this study was to integrate feasible preoperative variables into nomograms to guide clinicians in stratifying treatment options into no axillary staging for patients with non-metastatic disease (N0), SLNB for those with one or two metastases, and
Background: Persons with severe haemophilia require lifelong replacement therapy, prophylaxis, to prevent bleeding. Data describing long-term outcomes of prophylactic treatment are scarce. The aim of this study was to investigate joint surgery and survival among persons with severe haemophilia with special attention to access to prophylaxis in the early years of life. Methods: Eligible participant
Att lära sig uttalet i ett nytt språk är för många ett mödosamt arbete. Det gäller att kunna urskilja och producera allt ifrån ljudsegment till enskilda ord och prosodiska element, att få grepp om olika uttalsvarianter och förstå relationen mellan uttal och stavning. För att nå bästa tänkbara resultat för sina individuella uttalsmål behöver inläraren ofta professionell handledning och explicit un
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We analyzed a cohort of 599 cases of urothelial carcinoma for EGFR, ERBB2, and ERBB3 gene expression and genomic alterations. The cohort consisted of a reference set (n = 292) comprising all stages and grades and one set (n = 307) of advanced tumors. All cases were previously classified into urothelial carcinoma molecular subtypes. Genomic amplifications were established by array-CGH or in-situ hy
Infant botulism means that Clostridium botulinum colonize and produce toxin in the infant gut, usually during the first year of life. Illness severity varies widely and the incidence may be under-estimated. Infant botulism should be considered in cases of acute muscle weakness or floppiness in infants, especially when accompanied by constipation or feeding difficulties. Respiratory failure and nee
Most songbirds depart from stopover sites after sunset and migrate during the night. Several recent studies have reported larger variation in departure time than previously thought; yet, it is still unclear which factors govern departure timing. We investigated the departure timing of four species of nocturnally migrating songbirds using an automated radiotelemetry system at Falsterbo peninsula in
