Sökresultat

Filtyp

Din sökning på "*" gav 550715 sökträffar

Caught in a bottleneck : Habitat loss for woolly mammoths in central North America and the ice-free corridor during the last deglaciation

Aim: Identifying how climate change, habitat loss, and corridors interact to influence species survival or extinction is critical to understanding macro-scale biodiversity dynamics under changing environments. In North America, the ice-free corridor was the only major pathway for northward migration by megafaunal species during the last deglaciation. However, the timing and interplay among the lat

Sustain the Abilities of the Future SMEs’ Empirical Study

Sustainability of the enterprise is crucial to support long-term business survival and development. Unpredictable events such as Covid-19 highlights sustainability issues in enterprises. This empirical study aims to investigate sociotechnical sustainability in real world work practices. The focus is on employee involvement and problems in work practices concerning the economic, environmental, soci

Prenatal Gyrification Pattern Affects Age at Onset in Frontotemporal Dementia

The paracingulate sulcus is a tertiary sulcus formed during the third trimester. In healthy individuals paracingulate sulcation is more prevalent in the left hemisphere. The anterior cingulate and paracingulate gyri are focal points of neurodegeneration in behavioral variant frontotemporal dementia (bvFTD). This study aims to determine the prevalence and impact of paracingulate sulcation in bvFTD.

Cerebrospinal fluid neurofilament light chain differentiates primary psychiatric disorders from rapidly progressive, Alzheimer's disease and frontotemporal disorders in clinical settings

INTRODUCTION: Many patients with cognitive and neuropsychiatric symptoms face diagnostic delay and misdiagnosis. We investigated whether cerebrospinal fluid (CSF) neurofilament light (NfL) and total-tau (t-tau) could assist in the clinical scenario of differentiating neurodegenerative (ND) from psychiatric disorders (PSY), and rapidly progressive disorders.METHODS: Biomarkers were examined in pati

Erferenheter av Swetra— ett svenskt MT-experiment

Swetra is primarily a research project, but its computer programs and reports may result in commercial products. The research group at Lund consists of a few persons only, which has advantages eind disadvantages. The main languages studied are Russian, English and Swedish. The grammatical model is Referent Grammar (RG) and the project is a spin-off of the development of that grammar. Referent Gram

Limitations of time-delayed case isolation in heterogeneous SIR models

The lack of methods to evaluate mechanical function of donated hearts in the context of transplantation imposes large precautionary margins, translating into a low utilization rate of donor organs. This has spawned research into cyber-physical models constituting artificial afterloads (arterial trees), that can serve to evaluate the contractile capacity of the donor heart. The Windkessel model is

Time-resolved photoluminescence spectroscopy of charge transfer states in blends of pentacene and perfluoropentacene

Charge transfer states in blends of organic semiconductors have significant importance for the functioning of organic optoelectronic devices, but are also interesting from the perspective of fundamental research as many of their properties as well as their influence on the photophysics of the material are not yet completely understood. We report on a time-resolved photoluminescence study of the ph

RAF proteins exert both specific and compensatory functions during tumor progression of NRAS driven melanoma.

NRAS and its effector BRAF are frequently mutated in melanoma. Paradoxically, CRAF but not BRAF was shown to be critical for various RAS-driven cancers, raising the question of the role of RAF proteins in NRAS-induced melanoma. Here, using conditional ablation of Raf genes in NRAS-induced mouse melanoma models, we investigate their contribution in tumour progression, from the onset of benign tumou

Integrated multimagnet systems

The trend for the design of the magnet system for modern synchrotron light sources is moving towards smaller magnet apertures with a reduction of the magnet dimensions as a consequence. There are several reasons for this: to increase the number of focusing cells in a given ring circumpherence to increase the multipole field strengths to reduce the total cost of the magnet and vacuum-systems. This

Attosecond dynamics of parametric amplification at 11 nm

X-ray parametric amplification is a high order parametric process with the capability to amplify ultrashort laser pulses with broad spectrum ranging from the extreme ultraviolet to the soft x-ray. In this contribution, the dynamics of this broadband amplification schema is studied with sub-20-as temporal resolution by seeding the amplifier with a train of 200-as-long pulses at 11 nm central wavele

MITF activity is regulated by a direct interaction with RAF proteins in melanoma cells

The MITF transcription factor and the RAS/RAF/MEK/ERK pathway are two interconnected main players in melanoma. Understanding how MITF activity is regulated represents a key question since its dynamic modulation is involved in the phenotypic plasticity of melanoma cells and their resistance to therapy. By investigating the role of ARAF in NRAS-driven mouse melanoma through mass spectrometry experim

Last interglacial (MIS 5e) sea level proxies in the glaciated Northern Hemisphere

Because global sea level during the last interglacial (LIG; 130–115 ka) was higher than today, the LIG is a useful analogue for improving predictions of future sea level rise. Here, we synthesize sea level proxies for the LIG in the glaciated Northern Hemisphere for inclusion in the World Atlas of Last Interglacial Shorelines (WALIS) database. We describe 82 sites from Russia, northern Europe, Gre