29,405 results match your criteria: "Freie Universitat Berlin[Affiliation]"

Pentafluoroorthotellurate Uncovered: Theoretical Perspectives on an Extremely Electronegative Group.

Inorg Chem

January 2025

Departamento de Química Física and Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), Universidad de Zaragoza, Zaragoza 50009, Spain.

Article Synopsis
  • The pentafluoroorthotellurate group (-OTeF, teflate) is a potent electron-withdrawing substitute for fluoride, known for its stability and size, which helps avoid bridging ligand behavior.
  • This study employs advanced Quantum Chemical Topology methods to analyze the electronic structure and bonding of the teflate group, comparing its electronegativity with halogens and investigating the interactions in various XOTeF systems.
  • Findings reveal that while teflate exhibits strong electron-withdrawing abilities akin to fluorine, its bonding is predominantly ionic and shares similar electronegativity traits with other O-donor groups.
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An association of mental health and in particular depression with cardiovascular disease has been shown in adults and to a lesser extent in the young. Recently improved measurement methods of carotid-intima media thickness (CIMT) and carotid stiffness (CS) allow more differentiated analyses of this link. We examined 4,361 participants of the nationwide KiGGS cohort aged 3-17 years at baseline and 14-28 years at follow-up.

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Reinforcement Learning Optimization of the Charging of a Dicke Quantum Battery.

Phys Rev Lett

December 2024

Freie Universität Berlin, Department of Mathematics and Computer Science, Arnimallee 6, 14195 Berlin, Germany.

Quantum batteries are energy-storing devices, governed by quantum mechanics, that promise high charging performance thanks to collective effects. Because of its experimental feasibility, the Dicke battery-which comprises N two-level systems coupled to a common photon mode-is one of the most promising designs for quantum batteries. However, the chaotic nature of the model severely hinders the extractable energy (ergotropy).

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Schemes of classical shadows have been developed to facilitate the readout of digital quantum devices, but similar tools for analog quantum simulators are scarce and experimentally impractical. In this Letter, we provide a measurement scheme for fermionic quantum devices that estimates second and fourth order correlation functions by means of free fermionic, translationally invariant evolutions-or quenches-and measurements in the mode occupation number basis. We precisely characterize what correlation functions can be recovered and equip the estimates with rigorous bounds on sample complexities, a particularly important feature in light of the difficulty of getting good statistics in reasonable experimental platforms, with measurements being slow.

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Introduction/aims: Glucocorticoid (GC)-related adverse reactions and risks are commonly seen during the treatment of immune-mediated and inflammatory neuromuscular disorders. There is wide variation in the management of associated complications. The aim of this study is to develop international consensus guidance on the management of GC-related complications in neuromuscular disorders.

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Integrated psychosocial support in the ICU.

Curr Opin Anaesthesiol

February 2025

Department of Developmental Pediatrics.

Article Synopsis
  • The ICU environment exposes patients, relatives, and staff to traumatic experiences, prompting the need for effective mental health support to mitigate adverse effects.
  • Current mental health services in healthcare systems typically react to existing conditions, making them less effective for prevention; integrated psychosocial support (IPS) models show promise by incorporating psychologists directly into ICU teams.
  • Psychologists in the ICU can identify and address mental health issues early, enhancing support for patients and staff, and improving the overall resilience of the ICU team.
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Purpose Of Review: Climate change, biodiversity loss, and pollution present a major threat to health. Although emphasis has been put on physical health impacts, evidence on the mental health consequences is now also accumulating quickly. Given the rapid developments in the field, this article provides an expert opinion on the emerging research.

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Background: Up to now, the optimal duration of immune checkpoint inhibitors (ICI) has not been evaluated in prospective studies. However, current clinical practice requires decisions to be made regarding the duration of ICI in complete responders.

Material And Methods: A survey was sent to 80 DeCOG skin cancer centers to assess how decisions are made on treatment duration of ICI in melanoma after having reached complete response, and staging intervals after ICI discontinuation.

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The emergence of a local effective theory from a more fundamental theory of quantum gravity with seemingly fewer degrees of freedom is a major puzzle of theoretical physics. A recent approach to this problem is to consider general features of the Hilbert space maps relating these theories. In this work, we construct approximately local observables, or overlapping qubits, from such non-isometric maps.

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Dystrophy-associated fer-1-like protein (dysferlin) conducts plasma membrane repair. Mutations in the DYSF gene cause a panoply of genetic muscular dystrophies. We targeted a frequent loss-of-function, DYSF exon 44, founder frameshift mutation with mRNA-mediated delivery of SpCas9 in combination with a mutation-specific sgRNA to primary muscle stem cells from two homozygous patients.

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Combined endurance and resistance exercise training in heart failure with preserved ejection fraction: a randomized controlled trial.

Nat Med

January 2025

Department for Preventive Sports Medicine and Sports Cardiology, Technical University of Munich, School of Medicine and Health, TUM University Hospital, Munich, Germany.

Endurance exercise training (ET) is an effective treatment in heart failure with preserved ejection fraction (HFpEF), but the efficacy of resistance training in this patient population has been only scarcely evaluated. In this multicenter, randomized trial, we evaluated the effects of combined endurance and resistance training over 12 months in patients with HFpEF. The primary endpoint was a modified Packer score, including all-cause mortality, hospitalizations classified as potentially related to heart failure or exercise and changes in peak oxygen consumption ( ), diastolic function (E/e'), New York Heart Association (NYHA) class and global self-assessment (GSA).

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The GPCR autoproteolysis inducing (GAIN) domain is an ancient protein fold ubiquitous in adhesion G protein-coupled receptors (aGPCR). It contains a tethered agonist necessary and sufficient for receptor activation. The GAIN domain is a hotspot for pathological mutations.

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At presynaptic active zones (AZs), scaffold proteins are critical for coordinating synaptic vesicle release and forming essential nanoarchitectures. However, regulatory principles steering AZ scaffold assembly, function, and plasticity remain insufficiently understood. We here identify an additional Drosophila AZ protein, "Blobby", essential for proper AZ nano-organization.

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Verifiable measurement-based quantum random sampling with trapped ions.

Nat Commun

January 2025

Joint Center for Quantum Information and Computer Science (QuICS), University of Maryland & NIST, College Park, MD, USA.

Quantum computers are now on the brink of outperforming their classical counterparts. One way to demonstrate the advantage of quantum computation is through quantum random sampling performed on quantum computing devices. However, existing tools for verifying that a quantum device indeed performed the classically intractable sampling task are either impractical or not scalable to the quantum advantage regime.

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Diabetes impairs IFNγ-dependent antibacterial defense in the lungs.

Mucosal Immunol

December 2024

Department of Infectious Diseases, Respiratory Medicine and Critical Care, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Augustenburger Platz 1, 13353 Berlin, Germany; German center for lung research (DZL), Augustenburger Platz 1, 13353 Berlin, Germany. Electronic address:

Diabetes mellitus is associated with an increased risk of pneumonia, often caused by so-called typical and atypical pathogens including Streptoccocus pneumoniae and Legionella pneumophila, respectively. Here, we employed a variety of mouse models to investigate how diabetes influences pulmonary antibacterial immunity. Following intranasal infection with S.

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Reactivation of hidden-latent infection after doxycycline and streptomycin treatment in mice.

Antimicrob Agents Chemother

December 2024

Programa de Investigación en Enfermedades Tropicales, Escuela de Medicina Veterinaria, Universidad Nacional, Heredia, Costa Rica.

Brucellosis has therapeutic challenges due to 3%-15% relapses/therapeutic failures (R/TF) after antibiotic treatment. Therefore, determining the antibiotic concentration in tissues, the physiopathological parameters, and the R/TF after treatment is relevant. After exploring different antibiotic quantities, we found that a combined dose of 100 µg/g of doxycycline (for 45 days) and 7.

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Introduction: Chronic spontaneous urticaria (CSU) is a disease with a high impact on the quality of life of patients. There are some evaluations of the economic cost of the disease in developed countries, but there is little information about the economic cost of the disease in developing countries. Our aim was to assess the economic diagnostic and therapeutic expenses of CSU in five Latin American (LA) countries.

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Impact of complications on survival outcomes in different temporary mechanical circulatory support techniques: A large retrospective cohort study of cardiac surgical and nonsurgical patients.

J Heart Lung Transplant

December 2024

Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany; DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Berlin, Germany; Department of Cardiothoracic and Vascular Surgery, Deutsches Herzzentrum der Charité, Berlin, Germany.

Background: Temporary mechanical circulatory support (tMCS) has become a standard treatment in cardiogenic shock but is associated with high complication rates. This study analyzes common complications associated with modern tMCS devices and their impact on mortality depending on the tMCS approach.

Methods: We conducted a retrospective single-center analysis of patients with all-cause cardiogenic shock treated with veno-arterial extracorporeal life support, microaxial flow pump, and a combination of both (ECMELLA).

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Neuropsychological profiles of patients suffering from hallucinogen persisting perception disorder (HPPD): A comparative analysis with psychedelic-using and non-using controls.

Sci Rep

December 2024

Campus Charité Mitte, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Psychiatric University Clinic at Hospital St. Hedwig, 10115, Berlin, Germany.

Classic psychedelics like LSD and psilocybin are showing promising effects in treating certain psychiatric disorders. Despite their low toxicity and lack of an addictive potential, in some individuals, psychedelics can be associated with persisting psychological harms. Hallucinogen Persisting Perception Disorder (HPPD) is one of those complications, a rare disorder characterized by enduring perceptual symptoms without impaired reality control.

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Objectives: The objective of this study is to investigate lipopolysaccharid-binding protein (LBP), zonulin and calprotectin as markers of bacterial translocation, disturbed gut barrier and intestinal inflammation in patients with radiographic axial spondyloarthritis (r-axSpA) during tumour necrosis factor inhibitor (TNFi) therapy and to analyze the association between disease activity, response to treatment and biomarker levels.

Methods: Patients with active r-axSpA of the German Spondyloarthritis Inception Cohort starting TNFi were compared with controls with chronic back pain. Serum levels of LBP, zonulin and calprotectin were measured at baseline and after 1 year of TNFi therapy.

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Objectives: This study aimed to compared Patient-Reported Outcomes Measurement Information System (PROMIS) anxiety, depression, and anger item bank among Korean, US and Dutch general population.

Methods: Between December 2021 and January 2022, we surveyed representative Korean participants (N = 2699). Then we compared the mean T-scores of PROMIS anxiety, depression, and anger full items bank among Korean, US (N = 1696) and the Dutch (N = 1002) populations.

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Automated glycan assembly (AGA) streamlines the synthesis of complex oligosaccharides. The reducing end of the oligosaccharide serves as an attachment site to the polymer support to liberate a free reducing end or an aminopentanol for ready conjugation to carrier proteins or surfaces. The facile installation of different aglycons on oligosaccharides has not been possible via AGA until now.

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Microplastics Generate Less Mineral Protection of Soil Carbon and More CO Emissions.

Adv Sci (Weinh)

December 2024

Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China.

Microplastic pollution in terrestrial ecosystems threatens to destabilize large soil carbon stocks that help to mitigate climate change. Carbon-based substrates can release from microplastics and contribute to terrestrial carbon pools, but how these emerging organic compounds influence carbon mineralization and sequestration remains unknown. Here, microcosm experiments are conducted to determine the bioavailability of microplastic-derived dissolved organic matter (MP-DOM) in soils and its contribution to mineral-associated carbon pool.

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Polyethyleneimine-Based Cryogels Enabling the Selective and Reversible Adsorption of Chlorine.

Adv Sci (Weinh)

December 2024

Freie Universität Berlin, Institut für Chemie und Biochemie - Anorganische Chemie, Fabeckstr. 34/36, 14195, Berlin, Germany.

Herein hyperbranched polyethyleneimine (hPEI) cryogels are reported for the selective and reversible adsorption of elemental chlorine. The cryogels are prepared in an aqueous solution by crosslinking with glutaraldehyde at subzero temperatures. The final macroporous composites bearing ammonium chloride groups are obtained after freeze-drying.

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