6,297 results match your criteria: "Eoetvoes Lorand University[Affiliation]"

Magnetic structures in the explicitly time-dependent nontwist map.

Chaos

December 2024

Department of Atomic Physics, Eötvös Loránd University, 1117 Pázmány Péter sétány 1A, Budapest, Hungary.

We investigate how the magnetic structures of the plasma change in a large aspect ratio tokamak perturbed by an ergodic magnetic limiter, when a system parameter is non-adiabatically varied in time. We model such a scenario by considering the Ullmann-Caldas nontwist map, where we introduce an explicit time-dependence to the ratio of the limiter and plasma currents. We apply the tools developed recently in the field of chaotic Hamiltonian systems subjected to parameter drift.

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MARVEL Analysis of High-Resolution Rovibrational Spectra of OCO.

J Comput Chem

January 2025

HUN-REN-ELTE Complex Chemical Systems Research Group, Budapest, Hungary.

A large set of validated experimental transitions and empirical rovibrational energy levels are reported for the fifth most abundant carbon dioxide isotopologue, OCO (in a shorthand notation, 638). Validation of the transitions and determination of the empirical energy levels are based on a compiled and carefully checked dataset, collected from 35 literature sources, containing 12 348/7432 measured/unique lines in the wavenumber range of 578-9318 cm. The MARVEL (Measured Active Rotational-Vibrational Energy Levels) protocol, built upon the theory of spectroscopic networks, not only validates the vast majority of the measured transitions, but also yields 3975 empirical rovibrational energy levels, with uncertainty estimates compliant with the experimental uncertainties of the transitions.

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The retraction of an article is probably the most severe outcome of a scientific project. While great emphasis has been placed on articles retracted due to scientific misconduct, studies show many retractions are due to honest errors. Unfortunately, in most cases, retraction notices do not provide sufficient information to determine the specific types and causes of these errors.

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Article Synopsis
  • The Carpathian Basin experienced significant demographic changes during the Early Medieval period, influenced by Avar rule for about 250 years and the arrival of early Hungarians in the late 9th century CE.
  • This study analyzes 296 ancient genetic samples from Western Hungary, providing insights into the population structure and dynamics between the 5th and 11th centuries CE, focusing on specific microregions.
  • The research uncovers distinct historical developments in Transdanubia, emphasizing the complex interactions and genetic integration among Hun, Avar, and Hungarian groups during and after the conquest period.
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Thermal Softening Measurements of Refractory High-Entropy Alloys.

Materials (Basel)

November 2024

H-ION Kft., Konkoly-Thege Miklós út 29.-33., H-1121 Budapest, Hungary.

Home-built equipment will be presented able to measure the thermal expansion (with a flat indenter) and indentation depth (with a pointed indenter) up to 1100 °C. In dilatometer mode, the allotropic phase transformations can be studied. For hardness, a Rockwell-type measurement is adopted.

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Our ongoing research focuses on the development of new imipridone derivatives. We aim to design compounds that can completely and selectively eradicate cancer cells after relatively short treatment. We have synthetized systematically designed novel hybrids and evaluated their antiproliferative activity against PANC-1 and Fadu cell lines.

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Effects of Polyvinyl Chloride (PVC) Microplastic Particles on Gut Microbiota Composition and Health Status in Rabbit Livestock.

Int J Mol Sci

November 2024

Agribiotechnology and Precision Breeding for Food Security National Laboratory, Department of Microbiology and Applied Biotechnology, Institute of Genetics and Biotechnology, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary.

The widespread use of polyvinyl chloride (PVC) and its entry into humans and livestock is of serious concern. In our study, we investigated the impact of PVC treatments on physiological, pathological, hormonal, and microbiota changes in female rabbits. Trend-like alterations in weight were observed in the spleen, liver, and kidney in both low (P1) and high dose (P2) PVC treatment groups.

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In this study, we explored the structural and chemical modifications of cellulose fibres subjected to chemical and mechanical treatments through an innovative analytical approach. We employed photoacoustic spectroscopy (PAS) and reversed double-beam photoacoustic spectroscopy (RDB-PAS) to examine the morphological changes and the chemical integrity of the treated fibres. The methodology provided enhanced sensitivity and specificity in detecting subtle alterations in the treated cellulose structure.

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Canine leishmaniosis (CanL) is a zoonotic disease caused by , where increased interferon-gamma (IFN-γ) levels are associated with controlling the infection and mild to moderate disease. Therefore, monitoring IFN-γ concentrations is essential for monitoring the immune responses in CanL. This study compared a faster, cost-effective IFN-γ release whole blood assay in tubes (WBA-T) with a standardized version (WBA-S) in 41 dogs at different states of infection.

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Rank-Related Differences in Dogs' Behaviours in Frustrating Situations.

Animals (Basel)

November 2024

Department of Ethology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/c, 1117 Budapest, Hungary.

Dogs are strongly dependent on humans, not only for sustenance, but they also form asymmetrical bonds with us where they rely on assistance from the human partner in the case of difficult situations. At the same time, cohabiting dogs form hierarchies, and their rank strongly influences their behaviour in various social interactions. In this study, we investigated whether high- and low-ranking dogs would behave differently in non-social and social contexts where a formerly available reward suddenly becomes inaccessible.

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One of the most significant challenges in adolescence is the pursuit of social acceptance, which can manifest in various forms, including likeability and popularity. Achieving social acceptance is associated with positive outcomes, while its absence is linked to adverse consequences. Existing research into the personality determinants impacting the ability to elicit likeability or gain popularity remains limited, primarily focusing on the influence of Big Five traits.

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Anisogamy and sex roles: a commentary.

Evol Lett

December 2024

Department of Life Sciences, Milner Centre for Evolution, University of Bath, Bath BA2 7AY, United Kingdom.

The origin and maintenance of sex differences in reproductive behavior (often labeled sex roles) have remained controversial topics, and recent meta-analyses and theoretical models have helped to elucidate the processes that generate diverse sex roles. We are glad to see that our study (Mokos et al., 2021) generated a healthy debate, and in agreement with recent commentaries (Janicke, 2024; Lehtonen & Parker, 2024) we call for a more comprehensive approach to understanding sex role evolution.

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Habitat fragmentation is among the most important global threats to biodiversity; however, the direct effects of its components including connectivity loss are largely unknown and still mostly inferred based on indirect evidence. Our understanding of these drivers is especially limited in microbial communities. Here, by conducting a 4-month outdoor experiment with artificial pond (mesocosm) metacommunities, we studied the effects of connectivity loss on planktonic microorganisms, primarily focusing on pro- and microeukaryotes.

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The lateral thalamus: a bridge between multisensory processing and naturalistic behaviors.

Trends Neurosci

December 2024

Institute for Systems Physiology, Faculty of Medicine, University of Cologne and University Clinic Cologne, Cologne 50931, Germany. Electronic address:

The lateral thalamus (LT) receives input from primary sensory nuclei and responds to multimodal stimuli. The LT is also involved in regulating innate and social behaviors through its projections to cortical and limbic networks. However, the importance of multisensory processing within the LT in modulating behavioral output has not been explicitly addressed.

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Temporal and spatial distribution of inorganic fluoride, total adsorbable organofluorine, PFOA and PFOS concentrations in the Hungarian section of the Danube River.

J Hazard Mater

December 2024

Institute of Aquatic Ecology, HUN-REN Centre for Ecological Research Budapest, Hungary; National Laboratory for Water Science and Water Security, Institute of Aquatic Ecology, HUN-REN Centre for Ecological Research, Budapest, Hungary; Institute of Chemistry, Eötvös Loránd University, Budapest, Hungary. Electronic address:

The existing technologies in municipal wastewater treatment plants are ineffective in eliminating persistent fluorine-containing contaminants. At the same time, there is an increasing demand for novel organofluorine compounds, particularly in the production of lithium-ion batteries, as well as in the agrochemical and pharmaceutical sectors for more efficient ingredients. This implies that we must account for ongoing changes in the fluorine levels within riverine environments.

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Bioinspired Synthesis of (-)-Hunterine A: Deciphering the Key Step in the Biogenetic Pathway.

Chemistry

December 2024

Organocatalysis Research Group, Institute of Organic Chemistry, HUN-REN Research Centre for Natural Sciences, 2. Magyar tudósok krt., H-1117, Budapest, Hungary.

A concise, bioinspired, and enantioselective synthesis of (-)-hunterine A, an odd 6/7/6/6/5 pentacyclic natural product, is described. The key step in the synthesis of this complex structure is an interim-template directed 6-exo selective epoxide ring-opening reaction, which is interwoven with a hydrolysis step of the indolenine hemiaminal template to create the unusual 7-membered azepine bridge motif. Our work not only refines the previously proposed biogenetic pathway, but also reveals the possible stereochemical prerequisite of the unique skeletal rearrangement, which provides a vantage point for understanding how (-)-hunterine A is likely to be generated in nature.

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Oxygen evolution reaction (OER) catalyst stability metrics derived from aqueous model systems (AMSs) prove valuable only if they are transferable to technical membrane electrode assembly (MEA) settings. Currently, there is consensus that stability data derived from ubiquitous rotating disk electrode (RDE)-based investigations substantially overestimate material degradation mainly due to the nonideal inertness of catalyst-backing electrode materials as well as bubble shielding of the catalyst by evolved oxygen. Despite the independently developed understanding of these two processes, their interplay and relative impact on intrinsic and operational material stability have not yet been established.

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Article Synopsis
  • The study investigates when dogs are classified as "old" through analysis of veterinary clinical narratives, focusing on their welfare as they age.
  • A sample of 1,000 consultations identified 832 dogs considered to be of old age, with most dogs entering this stage around 7.25 years, particularly varying by breed.
  • Common health issues in older dogs included weight, musculoskeletal, dental, integumentary, and digestive conditions, suggesting a need for targeted health interventions as dogs age.
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Increase in slow frequency and decrease in alpha and beta power during post-learning rest predict long-term memory success.

Cortex

December 2024

Institute of Cognitive Neuroscience and Psychology, HUN-REN Research Centre for Natural Sciences, Budapest, Hungary; Institute of Psychology, University of Szeged, Szeged, Hungary; Cognitive Medicine Research Group, Competence Centre for Neurocybernetics of the Life Sciences Cluster of the Centre of Excellence for Interdisciplinary Research, Development and Innovation of the University of Szeged, University of Szeged, Szeged, Hungary.

Formation of episodic memories is linked to cortico-hippocampal interactions during learning, practice, and post-learning rest, although the role of cortical activity itself in such processes remains elusive. Behaviorally, long-term retention of episodic memories has been shown to be aided by several different practice strategies involving memory reencounters, such as repeated retrieval and repeated study. In a two-session resting state electroencephalography (EEG) experiment, using data from 68 participants, we investigated the electrophysiological predictors of long-term memory success in situations where such reencounters occurred after learning.

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Current Advances in Behavioral Addictions: From Fundamental Research to Clinical Practice.

Am J Psychiatry

December 2024

General Psychology-Cognition, Faculty of Computer Science, University of Duisburg-Essen, Germany (Brand, Antons, Wegmann); Center for Behavioral Addiction Research, Center for Translational Neuro- and Behavioral Sciences, University Hospital Essen, University of Duisburg-Essen, Germany (Brand, Antons, Wegmann); Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany (Brand, Antons); Department of Psychology, University of Montreal, Montreal (Bőthe); Interdisciplinary Research Center on Intimate Relationship Problems and Sexual Abuse (CRIPCAS), Montreal (Bőthe); College of Education, Psychology, and Social Work, Flinders University, Adelaide, Australia (Demetrovics, King); Institute of Psychology, ELTE Eötvös Loránd University, Budapest (Demetrovics); Center of Excellence in Responsible Gaming, University of Gibraltar, Gibraltar (Demetrovics); School of Life and Medical Sciences, University of Hertfordshire, Hatfield, UK (Fineberg); Hertfordshire Partnership University NHS Foundation Trust, Welwyn Garden City, UK (Fineberg); University of Cambridge School of Clinical Medicine, Cambridge, UK (Fineberg); Department of Clinical Psychology, Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona (Jimenez-Murcia); Ciber Physiopathology of Obesity and Nutrition, Instituto de Salud Carlos III, Barcelona (Jimenez-Murcia); Psychoneurobiology of Eating and Addictive Behaviors Group, Neurosciences Program, IDIBELL, Barcelona (Jimenez-Murcia); Department of Clinical Sciences, School of Medicine and Health Sciences, University of Barcelona, Barcelona (Jimenez-Murcia); Psychology Services of the University of Barcelona, Barcelona (Jimenez-Murcia); Instituto de Investigación, Transferencia e Innovación, Universidad Internacional de La Rioja, La Rioja, Spain (Mestre-Bach); Department of General Psychology, University of Padova, Padua, Italy (Moretta); Department of Psychosomatic Medicine and Psychotherapy, Hannover Medical School, Hanover, Germany (Müller); Departments of Psychiatry, Neuroscience, and Child Study and Wu Tsai Institute, Yale University School of Medicine, New Haven, CT (Potenza); Connecticut Council on Problem Gambling, Wethersfield, CT (Potenza); Connecticut Mental Health Center, New Haven, CT (Potenza).

Article Synopsis
  • Gambling disorder is the only recognized behavioral addiction in DSM-5, while Internet gaming disorder is noted for further research; other potential disorders include compulsive sexual behavior, compulsive shopping, and social media issues.
  • These disorders are clinically relevant and often coexist with conditions like depression and anxiety, with validated diagnostic tools available but no approved medications for treatment.
  • Cognitive-behavioral therapy shows the most promise, highlighting the need for active screening and public health efforts, along with further research into treatment methods that combine various therapeutic approaches.
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Introduction: Behavioral inhibition is a temperamental factor that increases the risk of internalizing disorders. Therefore, the identification of highly inhibited children is of great importance. However, informant discrepancies make this process difficult.

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Article Synopsis
  • The CMS experiment conducted a search for charge-parity violation in decays using proton-proton collision data from 2018, analyzing around 10 billion events with b hadrons decaying into charm hadrons.
  • The flavor of the neutral D meson was determined through the charge of pions in the reconstructed decays, and an asymmetry measurement in the decays was reported, taking into account various uncertainties.
  • This research marks the first asymmetry measurement by the CMS in the charm sector and the first to use a fully hadronic final state in such analyses.
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