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2,556 results match your criteria: "Humboldt-University Berlin[Affiliation]"
Chaos
December 2024
Potsdam Institute for Climate Impact Research, Telegrafenberg, Potsdam 14473, Germany.
Adaptive dynamical networks are ubiquitous in real-world systems. This paper aims to explore the synchronization dynamics in networks of adaptive oscillators based on a paradigmatic system of adaptively coupled phase oscillators. Our numerical observations reveal the emergence of synchronization cluster bursting, characterized by periodic transitions between cluster synchronization and global synchronization.
View Article and Find Full Text PDFPLoS One
December 2024
Institute of Virology, Charité - Universitätsmedizin Berlin, Corporate Member of Free University Berlin, Humboldt-University Berlin, and Berlin Institute of Health, Berlin, Germany.
The genus Alphavirus harbors arboviruses of great concern, such as the Chikungunya virus and the equine encephalitis viruses. Transmission of pathogenic alphaviruses by mosquitoes could be influenced by insect-specific alphaviruses such as Eilat virus (EILV). However, insect-specific alphaviruses are rarely found in wild mosquitoes and only a few have been described in the literature.
View Article and Find Full Text PDFAnn N Y Acad Sci
December 2024
Department of Earth, Environmental, and Planetary Sciences, Rice University, Houston, Texas, USA.
Tropical cyclones (TCs) are one of the major natural hazards to island and coastal communities and ecosystems. However, isotopic compositions of TC-derived precipitation (P) in surface water (SW) and groundwater (GW) reservoirs are still lacking. We tested the three main assumptions of the isotope storm "spike" hypothesis (sudden spikes in isotopic ratios).
View Article and Find Full Text PDFProc Biol Sci
December 2024
Department of Molecular Parasitology, Institute for Biology, Humboldt University Berlin (HU). Philippstr. 13 Haus 14, Berlin 10115, Germany.
Closely related host species share similar symbionts, but the effects of host genetic admixture and environmental conditions on these communities remain largely unknown. We investigated the influence of host genetic admixture and environmental factors on the intestinal prokaryotic and eukaryotic communities (fungi, parasites) of two house mouse subspecies ( and ) and their hybrids in two settings: (i) wild-caught mice from the European hybrid zone and (ii) wild-derived inbred mice in a controlled laboratory environment before and during a community perturbation (infection). In wild-caught mice, environmental factors strongly predicted the overall microbiome composition.
View Article and Find Full Text PDFChaos
December 2024
Potsdam Institute for Climate Impact Research (PIK), Member of the Leibniz Association, Telegrafenberg A31, 14473 Potsdam, Germany.
Identifying complex periodic windows surrounded by chaos in the two or higher dimensional parameter space of certain dynamical systems is a challenging task for time series analysis based on complex network approaches. This holds particularly true for the case of shrimp structures, where different bifurcations occur when crossing different domain boundaries. The corresponding dynamics often exhibit either period-doubling when crossing the inner boundaries or, respectively, intermittency for outer boundaries.
View Article and Find Full Text PDFPsychol Aging
December 2024
Department of Psychology, University of Michigan.
Theory is critical for a developmental science that explains age-related change and stability in psychological phenomena-and their variation across generational and sociocultural contexts. This special issue presents four contributions that advance theoretical approaches to the psychological science of adult development and aging. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
View Article and Find Full Text PDFMicrobiol Resour Announc
December 2024
Max Planck Unit for the Science of Pathogens, Berlin, Germany.
The important human pathogen causes a wide range of diseases. Strain SF370 was the first fully sequenced strain of , providing essential insights into the molecular mechanisms of disease. We present an improved genome assembly of strain SF370 from ATCC, which corrects long-standing errors in its genome.
View Article and Find Full Text PDFNPJ Biofilms Microbiomes
December 2024
Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China.
Plant-beneficial Pseudomonas and Bacillus have been extensively studied and applied in biocontrol of plant diseases. However, there is less known about their interaction within two-strain synthetic communities (SynCom). Our study revealed that Pseudomonas protegens Pf-5 inhibits the growth of several Bacillus species, including Bacillus velezensis.
View Article and Find Full Text PDFClin Chem
December 2024
Bioanalytical Chemistry, Department of Chemistry, Humboldt University Berlin, Berlin, Germany.
Background: Serum total 25-hydroxyvitamin D [25(OH)D] concentration is the most widely used clinical biomarker for vitamin D status. Under certain physiological and pathological conditions, however, total 25(OH)D may not always be the best index for vitamin D status. Instead, the nonprotein-bound (free) fraction of total 25(OH)D has been suggested as a more appropriate marker in certain clinical situations.
View Article and Find Full Text PDFNucleic Acids Res
December 2024
Bioinformatics Group, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands.
Specialized or secondary metabolites are small molecules of biological origin, often showing potent biological activities with applications in agriculture, engineering and medicine. Usually, the biosynthesis of these natural products is governed by sets of co-regulated and physically clustered genes known as biosynthetic gene clusters (BGCs). To share information about BGCs in a standardized and machine-readable way, the Minimum Information about a Biosynthetic Gene cluster (MIBiG) data standard and repository was initiated in 2015.
View Article and Find Full Text PDFArtif Organs
December 2024
Heart and Diabetes Center North-Rhine Westphalia, University Hospital of the Ruhr University Bochum, Bad Oeynhausen, Germany.
Proc Natl Acad Sci U S A
December 2024
Department of Business Administration, Faculty of Business and Economics, University of Göttingen, Göttingen 37073, Germany.
Efforts to promote sustainable resource use through reduced meat consumption face challenges as global meat consumption persists. The resistance may be attributed to the lower sales price of meat compared to most plant-based meat alternatives (PBMAs). Addressing this, our research delves into the pivotal question of which PBMAs resonate most with consumers and how pricing affects demand.
View Article and Find Full Text PDFEur J Heart Fail
November 2024
Department of Cardiology and Pneumology, University of Göttingen Medical Center, Göttingen, Germany.
Aims: Traditional cardiovascular (CV) biomarkers (high-sensitivity troponinT [hsTnT] and N-terminal pro-B-type natriuretic peptide [NT-proBNP]) are important to monitor cancer patients' cardiac function and to assess prognosis. Newer CV biomarkers (mid-regional pro-adrenomedullin [MR-proADM], C-terminal pro-arginine vasopressin [copeptin], and mid-regional pro-atrial natriuretic peptide [MR-proANP]) might outperform traditional biomarkers.
Methods And Results: Overall, 442 hospitalized cancer patients without significant CV disease or current infection were enrolled (61 ± 15 years, 52% male, advanced cancer stage: 85%) and concentrations of CV biomarkers were analysed.
Int J Mol Sci
November 2024
Lomonosov Institute of Fine Chemical Technologies, MIREA-Russian Technological University, Vernadskogo pr. 86, Moscow 119571, Russia.
ACS Chem Neurosci
December 2024
Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.
Allopregnanolone (AlloP) is an example of neuroactive steroids (NAS), which is a potent allosteric activator of the γ-aminobutyric acid A (GABA) receptor. The mechanisms underlying the biological activity of AlloP and other NAS are only partially understood. Here, we present intrinsically fluorescent analogs of AlloP (MQ-323) and its 3β-epimer, epi-allopregnanolone (E-AlloP) (YX-11), and show, by a combination of spectroscopic and computational studies, that these analogs mimic the membrane properties of AlloP and E-AlloP very well.
View Article and Find Full Text PDFWe analyzed spin polarization dynamics in a two-dimensional system of spin 1/2 charged particles with spin-orbit interaction in perpendicular magnetic field in the presence of external noise. It was shown that spin polarization reveals quantum oscillations, collapses, and revivals. The hierarchy of time scales corresponding to quantum oscillations, collapses, and revivals was identified and analyzed.
View Article and Find Full Text PDFJ Comput Neurosci
November 2024
Bernstein Center for Computational Neuroscience Berlin, Philippstr. 13, Haus 2, 10115, Berlin, Germany.
We study the impact of bursts on spike statistics and neural signal transmission. We propose a stochastic burst algorithm that is applied to a burst-free spike train and adds a random number of temporally-jittered burst spikes to each spike. This simple algorithm ignores any possible stimulus-dependence of bursting but allows to relate spectra and signal-transmission characteristics of burst-free and burst-endowed spike trains.
View Article and Find Full Text PDFEur Respir J
November 2024
Institute for Physiology, Charité - Universitätsmedizin Berlin, corporate member of the Free University Berlin and the Humboldt University Berlin, Berlin, Germany.
Background: Calcification is common in chronic vascular disease, yet its role in pulmonary hypertension due to left heart disease is unknown. Here, we probed for the role of runt-related transcription factor-2 (RUNX2), a master transcription factor in osteogenesis, and its regulation by the HIPPO pathway transcriptional coactivator with PDZ-binding motif (TAZ) in the osteogenic reprogramming of pulmonary artery smooth muscle cells and vascular calcification in patients with pulmonary hypertension due to left heart disease. We similarly examined its role using an established rat model of pulmonary hypertension due to left heart disease induced by supracoronary aortic banding.
View Article and Find Full Text PDFAnal Chem
November 2024
Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M DK-5230, Denmark.
Angew Chem Int Ed Engl
November 2024
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, 430070, Wuhan, China.
Conserv Biol
November 2024
Geography Department, Humboldt-University Berlin, Berlin, Germany.
As land use intensifies globally, it increasingly exerts pressure on protected areas. Despite open, nonforested landscapes comprising up to 40% of protected areas globally, assessments have predominately focused on forests, overlooking the major pressures on rangelands from livestock overgrazing and land conversion. Across the southern Caucasus, a biodiversity hotspot extending over 5 countries, we conducted a broadscale assessment of the extent to which protected areas mitigate land-use pressure on rangelands in them.
View Article and Find Full Text PDFInt J Hyperthermia
November 2024
Department of Radiation Oncology, Charité - Universitätsmedizin Berlin corporate member of Free University Berlin and Humboldt University Berlin, Berlin, Germany.
Introduction: Hyperthermia (HT) at temperatures between 39 °C and 44 °C is utilized as an adjunctive cancer therapy, serving as potent radio- and chemosensitizer. Its effectiveness in treating solid malignancies has been well established. This raises the question of whether HT can also benefit patients with nonsolid tumors, such as lymphomas.
View Article and Find Full Text PDFArch Virol
November 2024
The Biodesign Center for Fundamental and Applied Microbiomics, School of Life Sciences, Center for Evolution and Medicine, Arizona State University, Tempe, AZ, 85287-4701, USA.
Brain Stimul
October 2024
Department of Neurology, University Medicine Greifswald, Greifswald, Germany; German Centre for Neurodegenerative Diseases (DZNE), Greifswald, Germany. Electronic address:
Antimicrob Agents Chemother
December 2024
Research School of Biology, The Australian National University, Canberra, Australia.
Thiamine is metabolized into thiamine pyrophosphate (TPP), an essential enzyme cofactor. Previous work has shown that oxythiamine, a thiamine analog, is metabolized by thiamine pyrophosphokinase (TPK) into oxythiamine pyrophosphate within the malaria parasite and then inhibits TPP-dependent enzymes, killing the parasite and . To identify a more potent antiplasmodial thiamine analog, 11 commercially available compounds were tested against and .
View Article and Find Full Text PDF