100 results match your criteria: "Martin-Luther-University Halle-Wittenberg - Halle[Affiliation]"
Ecol Evol
January 2025
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Polar Terrestrial Environmental Systems Potsdam Germany.
Mountains with complex terrain and steep environmental gradients are biodiversity hotspots such as the eastern Tibetan Plateau (TP). However, it is generally assumed that mountain terrain plays a secondary role in plant species assembly on a millennial time-scale compared to climate change. Here, we investigate plant richness and community changes during the last 18,000 years at two sites: Lake Naleng and Lake Ximen on the eastern TP with similar elevation and climatic conditions but contrasting terrain.
View Article and Find Full Text PDFAlzheimers Dement (N Y)
January 2025
Department of Health Economics and Health Services Research, Hamburg Center for Health Economics University Medical Center Hamburg-Eppendorf Hamburg Germany.
Introduction: The societal costs of dementia and cognitive decline are substantial and likely to increase during the next decades due to the increasing number of people in older age groups. The aim of this multicenter cluster-randomized controlled trial was to assess the cost-effectiveness of a multi-domain intervention to prevent cognitive decline in older people who are at risk for dementia.
Methods: We used data from a multi-centric, two-armed, cluster-randomized controlled trial ( trial, ID: DRKS00013555).
Annuality and perenniality represent two different life-history strategies in plants, and an analysis of genomic differentiation between closely related species of different life histories bears the potential to identify the underlying targets of selection. Additionally, understanding the interactions between patterns of recombination and signatures of natural selection is a central aim in evolutionary biology, because patterns of recombination shape the evolution of genomes by affecting the efficacy of selection. Here, our aim was to characterise the landscape of genomic differentiation between weedy annual rye ( L.
View Article and Find Full Text PDFChem Sci
August 2024
Institute of Chemistry, Faculty of Natural Sciences II, Martin-Luther-Universität Halle-Wittenberg Halle/Saale Germany
Covalent Organic Frameworks (COFs) exhibiting kagome () structures are promising crystalline porous materials with two distinct pores. However, there are no reliable synthetic methods to exclusively target the over the polymorphic square-lattice () structure. To address this, we introduce a linker design strategy featuring bulky functional groups, which through steric interactions can hinder the net formation, thereby leading to a structure.
View Article and Find Full Text PDFThe capacity of forests to sequester carbon in both above- and belowground compartments is a crucial tool to mitigate rising atmospheric carbon concentrations. Belowground carbon storage in forests is strongly linked to soil microbial communities that are the key drivers of soil heterotrophic respiration, organic matter decomposition and thus nutrient cycling. However, the relationships between tree diversity and soil microbial properties such as biomass and respiration remain unclear with inconsistent findings among studies.
View Article and Find Full Text PDFPlant-pollinator interactions are constrained by floral traits and available pollinators, both of which can vary across environmental gradients, with consequences for the stability of the interaction. Here, we quantified how the pollination ecology of a high-mountain hummingbird-pollinated plant changes across a progressively more stressful environmental gradient of the Venezuelan Andes. We compared pollination ecology between two populations of this plant: Piedras Blancas (PB) and Gavidia (GV), 4450 and 3600 m asl, respectively.
View Article and Find Full Text PDFLaryngoscope Investig Otolaryngol
June 2024
Department of Otorhinolaryngology, Head and Neck Surgery Carl-Thiem-Klinikum gGmbH Cottbus Germany.
Objective: The course of sedation during drug-induced sleep endoscopy (DISE) depends on the application pattern of the sedative drug. The depth of sedation should imitate light and deep sleep as well. Moreover, there should be as many breathing cycles as possible available for observation during light and deep sedation.
View Article and Find Full Text PDFJ Am Heart Assoc
September 2024
Department of Stroke and Neuroscience Charing Cross Hospital, Imperial College London NHS Healthcare Trust London United Kingdom.
There is limited evidence on the outcomes and safety of mechanical thrombectomy (MT) among patients with acute ischemic stroke (AIS) in the context of cardiac diseases. Our study reviews MT in AIS within the context of cardiac diseases, aiming to identify existing and emerging needs and gaps. PubMed and Scopus were searched until December 31, 2023, using a combination of cardiological diseases and "mechanical thrombectomy" or "endovascular treatment" as keywords.
View Article and Find Full Text PDFPhenological shifts due to changing climate are often highly species and context specific. Land-use practices such as mowing or grazing directly affect the phenology of grassland species, but it is unclear if plants are similarly affected by climate change in differently managed grassland systems such as meadows and pastures. Functional traits have a high potential to explain phenological shifts and might help to understand species-specific and land-use-specific phenological responses to changes in climate.
View Article and Find Full Text PDFBackground: Even after atrial fibrillation (AF) catheter ablation, many patients still experience relevant symptom burden. The objective of the MENTAL AF trial was to determine whether app-based mental training (MT) during the 3 months following pulmonary vein isolation reduces AF-related symptoms.
Methods And Results: Patients scheduled for pulmonary vein isolation were enrolled and randomized 1:1 to either app-based MT or usual care.
J Am Heart Assoc
April 2024
Department of Radiology LMU University Hospital, LMU Munich München Germany.
Background: We aimed to correlate alterations in the rat sarcoma virus (RAS)/mitogen-activated protein kinase pathway in vascular anomalies to the clinical phenotype for improved patient and treatment stratification.
Methods And Results: This retrospective multicenter cohort study included 29 patients with extracranial vascular anomalies containing mosaic pathogenic variants (PVs) in genes of the RAS/mitogen-activated protein kinase pathway. Tissue samples were collected during invasive treatment or clinically indicated biopsies.
J Biogeogr
January 2024
Division of Biodiversity Dynamics and Conservation, Department of Botany and Biodiversity Research University of Vienna Vienna Austria.
The Anthropocene is characterized by a rapid pace of environmental change and is causing a multitude of biotic responses, including those that affect the spatial distribution of species. Lagged responses are frequent and species distributions and assemblages are consequently pushed into a disequilibrium state. How the characteristics of environmental change-for example, gradual 'press' disturbances such as rising temperatures due to climate change versus infrequent 'pulse' disturbances such as extreme events-affect the magnitude of responses and the relaxation times of biota has been insufficiently explored.
View Article and Find Full Text PDFEcol Evol
February 2024
German Centre for Integrative Biodiversity Research (iDiv), Halle-Jena-Leipzig Leipzig Germany.
Ecological Niche Models (ENMs) are often used to project species distributions within alien ranges and in future climatic scenarios. However, ENMs depend on species-environment equilibrium, which may be absent for actively expanding species. We present a novel framework to estimate whether species have reached environmental equilibrium in their native and alien ranges.
View Article and Find Full Text PDFMulti-year and multi-site demographic data for rare plants allow researchers to observe threats and project population growth rates and thus long-term persistence of the species, generating knowledge, which allows for effective conservation planning. Demographic studies across more than a decade are extremely rare but allow for the effects of threats to be observed and assessed within the context of interannual environmental variation. We collected demographic data on the Threatened plant in two sites from 2011-2022.
View Article and Find Full Text PDFBiodivers Data J
April 2023
Institute of Biology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany Institute of Biology, Martin Luther University Halle-Wittenberg Halle (Saale) Germany.
Background: In the past decades, agricultural land abandonment and declining land-use intensity became common, especially in the Mediterranean countries of southern Europe. In some areas, this development opened up possibilities for rewilding and the recolonisation or expansion of large mammal populations. Yet, in some instances, co-occurrence of wild mammals and free-ranging domestic herbivores might lead to potential conflicts.
View Article and Find Full Text PDFObjectives: Infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes coronavirus disease 2019 (COVID-19). Although an acute SARS-CoV-2 infection mainly presents with respiratory illness, neurologic symptoms and sequelae are increasingly recognised in the long-term treatment of COVID-19 patients. The pathophysiology and the neuropathogenesis behind neurologic complications of COVID-19 remain poorly understood, but mounting evidence points to endothelial dysfunction either directly caused by viral infection or indirectly by inflammatory cytokines, followed by a local immune response that may include virus-specific T cells.
View Article and Find Full Text PDFThe application of traditional medicine by humans for the treatment of ailments as well as improving the quality of life far outdates recorded history. To date, a significant percentage of humans, especially those living in developing/underprivileged communities still rely on traditional medicine for primary healthcare needs. -based methods have been shown to play a pivotal role in modern pharmaceutical drug discovery processes.
View Article and Find Full Text PDFLaryngoscope Investig Otolaryngol
April 2023
Department of Otorhinolaryngology, Head and Neck Surgery Martin-Luther-University Halle-Wittenberg Halle (Saale) Germany.
Objective: Tracheoesophageal fistulas (TEF) following laryngectomy cause immense restrictions due to the inability of oral feeding, loss of voice rehabilitation, penetration of saliva, and permanent need of inflatable tracheal cannulas. Patients are consistently in threat of fatal aspiration pneumonias. The failure rate of surgical approaches to close the fistulas is high and an ultima ratio option by customized silicone prostheses can be considered.
View Article and Find Full Text PDFRSC Adv
April 2023
Department of Pharmaceutical Sciences, School of Pharmacy, University of Jordan Amman 11942 Jordan
GSK3β is a serine/threonine kinase that has been suggested as a putative drug target for several diseases. Recent studies have reported the beneficial effects of cephalosporin antibiotics in cancer and Alzheimer's disease, implying potential inhibition of GSK3β. To investigate this mechanism, four cephalosporins, namely, cefixime, ceftriaxone, cephalexin and cefadroxil were docked into the GSK3β binding pocket.
View Article and Find Full Text PDFFront Rehabil Sci
March 2023
Alice Salomon Hochschule Berlin, University of Applied Sciences, Berlin, Germany.
Introduction: Rehabilitation is a complex intervention that takes place in a complex setting. The MeeR project (characteristics of successful rehabilitation facilities) aims to identify complex conditions of successful rehabilitation outcomes.
Methods: A project with a sequential mixed-methods study design with a quantitative prestudy and a qualitative main study was applied.
Background: Facing an increasing number of radiofrequency ablation (RF) and cryoballoon ablation (CB) procedures for treatment of AF radiation exposure and its reduction is a focus point for interventional electrophysiologists.
Objective: This study evaluated the procedural parameters of the different ablation methods focusing on radiation exposure and the BMI of the patients.
Methods: One thousand one hundred and thirty-three first procedural cases of pulmonary vein isolation in patients with paroxysmal and persistent AF treated with RF and CB-based techniques were analyzed retrospectively over a period of 7 years focusing on the endpoints dose area product (DAP, cGycm), fluoroscopy time (FT, min) and procedural time (PT, min).
Four species of otters occur in tropical Asia, and all face multiple threats to their survival. Studies of distribution and population trends of these otter species in Asia, where they occur sympatrically, are complicated by their elusive nature and difficulties with reliable identification of species in field surveys. In Malaysia, only three species, the smooth-coated otter, Asian small-clawed otter, and hairy-nosed otter have been reliably reported as residents.
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