Sökresultat

Filtyp

Din sökning på "*" gav 549746 sökträffar

Identifying medullary bone in extinct avemetatarsalians : challenges, implications and perspectives

Medullary bone (MB) is a sex-specific tissue produced by female birds during the laying cycle, and it is hypothesized to have arisen within Avemetatarsalia, possibly outside Avialae. Over the years, researchers have attempted to define a set of criteria from which to evaluate the nature of purported MB-like tissues recovered from fossil specimens. However, we argue that the prevalence, microstruct

Absence of GP130 cytokine receptor signaling causes extended Stüve-Wiedemann syndrome

The gene IL6ST encodes GP130, the common signal transducer of the IL-6 cytokine family consisting of 10 cytokines. Previous studies have identified cytokine-selective IL6ST defects that preserve LIF signaling. We describe three unrelated families with at least five affected individuals who presented with lethal Stüve-Wiedemann-like syndrome characterized by skeletal dysplasia and neonatal lung dys

The Euro and the Nation-State That Never Disappeared: Would Europe Benefit from the Return of National Currencies?

This chapter discusses the current problems and future prospects of the euro area. The author argues that the problem for the euro area is not the return of the nation-state, but that the nation-states never disappeared. A common currency requires common economic policies, which is largely lacking in the euro area. As a result, large economic and social imbalances have emerged. The chapter examine

Disentangling the Early History of the Solar System

Giant planets form out of a disc of gas and dust – called protoplanetary disc -- that surrounded the protosun at the time of its formation. While the cores of giant planets were growing via planetesimal and pebble accretion, they started to interact with the gas in the protoplanetary disc. These interactions can lead to inward migration of all the four giant planets in our Solar System during the

Ecology of pollinators, pests and natural enemies in agricultural landscapes : ensuring a sustainable supply of clover seeds

The human population and its food consumption continues to grow and the environmental impact of meeting future food demands depends on how we expand the food supply. Already, agricultural intensification has led to biodiversity declines, which in turn can have direct and indirect effects on agricultural production. For future sustainable production there is a need to support ecosystems and their a

The topography of Hermione : A preliminary outline

The preliminary results of a survey of ancient Hermione (epichoric Hermion) are presented in this paper. The survey was conducted during three short campaigns over the period 2015–2017, and focused on the urban layout and development of the ancient city. Because the ancient city area more or less coincides with modern Ermioni, the investigation was mainly restricted to the documentation and analys

Self-Disorders in Asperger Syndrome Compared to Schizotypal Disorder : A Clinical Study

OBJECTIVE: There are historical and theoretical indications of a difference in subjective experience between autism spectrum disorder (ASD) and the schizophrenia spectrum. However, this difference has not been empirically explored. Therefore, to explore potential differences in subjective experience between the 2 spectra, we examined the presence/absence of self-disorders in Asperger syndrome/auti

Using Cards to Facilitate Conversations About Wishes and Priorities of Patients in Palliative Care

To avoid discomfort, health care professionals may hesitate to pursue conversations about end of life with patients. Certain tools have the potential to facilitate smoother conversations in this matter. The objective was to explore the experiences of patients in palliative care in using statement cards to talk about their wishes and priorities. Forty-six cards with statements of wishes and priorit

Effect of synthesis methods on photoluminescent properties for CsPbBr3 nanocrystals : Hot injection method and conversion method

Multiple facile synthetic strategies for all inorganic perovskite CsPbBr3 nanocrystals (NCs) have been established and developed, profiting from their excellent performance and great potential applied in the field of photonic and optoelectronic. Here, CsPbBr3 NCs were synthesized by both hot injection method (method 1) and conversion method (method 2), and the discrepancy of their photophysical pr

Evaluation of Trends in Optimal Design of Pulse Transformers for Long Pulse High Power Applications

Solid state klystron modulators are typically based on oil-immersed pulse transformers due to their high performance, robustness, simplicity and straightforward design. However, the size of such transformers are highly impacted by pulse power, output voltage, pulse length, and required rise time; key parameters which are difficult to combine in long pulse high power linac applications. In this pap