1,777 results match your criteria: "TU Dortmund University`.[Affiliation]"

The creation of hosts capable of accommodating different guest molecules may enable these hosts to play useful roles in chemical purifications, among other applications. Metal-organic cages are excellent hosts for various guests, but they generally incorporate rigid structural units that hinder dynamic adaptation to specific guests. Here we report a conformationally adaptable pseudo-cubic cage that can dynamically increase its cavity volume to fit guests with differing sizes.

View Article and Find Full Text PDF

Device simulation plays a crucial role in complementing experimental device characterisation by enabling deeper understanding of internal physical processes. However, for simulations to be trusted, experimental validation is essential to confirm the accuracy of the conclusions drawn. In the framework of semiconductor detector characterisation, one powerful tool for such validation is the Two Photon Absorption-Transient Current Technique (TPA-TCT), which allows for highly precise, three-dimensional spatially-resolved characterisation of semiconductor detectors.

View Article and Find Full Text PDF

Industrial and construction wastes make up about half of all world wastes. In order to reduce their negative impact on the environment, it is possible to use part of them for concrete production. Using experimental-statistical modeling techniques, the combined effect of brick powder, recycling sand, and alkaline activator on fresh and hardened properties of self-compacting concrete for the production of textile-reinforced concrete was investigated.

View Article and Find Full Text PDF

An important psychometric property in educational and psychological testing is differential item functioning (DIF), assessing whether different subgroups respond differently to particular items within a scale, despite having the same overall ability level. In fact, DIF occurs when respondents with the same underlying trait level have different probabilities of selecting specific response categories, depending on their subgroup membership. This study aims to demonstrate the usefulness of rating scale tree (RStree) model in detecting DIF of Likert-type scales across age and gender in social sciences.

View Article and Find Full Text PDF

Assignment of the N-terminal domain of mouse cGAS.

Biomol NMR Assign

January 2025

Department of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany.

Cyclic GMP-AMP synthase (cGAS) is a DNA-sensing enzyme that is a member of the nucleotidyltransferase (NTase) family and functions as a DNA sensor. The protein is comprised of a catalytic NTase core domain and an unstructured hypervariable N-terminal domain (NTD) that was reported to increase protein activity by providing an additional DNA-binding surface. We report nearly complete H, N, and C backbone chemical-shift assignments of mouse cGAS NTD (residues 5-146), obtained with a set of 3D and 4D solution NMR experiments.

View Article and Find Full Text PDF

Topological confinement by a membrane anchor suppresses phase separation into protein aggregates: Implications for prion diseases.

Proc Natl Acad Sci U S A

January 2025

Department Biochemistry of Neurodegenerative Diseases, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum 44801, Germany.

Protein misfolding and aggregation are a hallmark of various neurodegenerative disorders. However, the underlying mechanisms driving protein misfolding in the cellular context are incompletely understood. Here, we show that the two-dimensional confinement imposed by a membrane anchor stabilizes the native protein conformation and suppresses liquid-liquid phase separation (LLPS) and protein aggregation.

View Article and Find Full Text PDF

 - a large-scale dataset of 3D medical shapes for computer vision.

Biomed Tech (Berl)

December 2024

Institute for Artificial Intelligence in Medicine (IKIM), University Hospital Essen (AöR), Essen, Germany.

Objectives: The shape is commonly used to describe the objects. State-of-the-art algorithms in medical imaging are predominantly diverging from computer vision, where voxel grids, meshes, point clouds, and implicit surface models are used. This is seen from the growing popularity of ShapeNet (51,300 models) and Princeton ModelNet (127,915 models).

View Article and Find Full Text PDF

Myopia prevalence, refractive status and uncorrected myopia among primary and secondary school students in Germany.

Front Med (Lausanne)

December 2024

Research Unit Vision, Visual Impairments and Blindness, Department of Rehabilitation Sciences, TU Dortmund University, Dortmund, Germany.

Introduction: The increasing prevalence of myopia worldwide is problematic because myopia can result in severe secondary pathologies, and is associated with considerable financial burden. With plenty of prevalence data available for some regions, current data for Europe remain sparse. Yet, information on myopia prevalence and associations is essential for monitoring, preventive and interventive purposes.

View Article and Find Full Text PDF

Ubiquitination is a dynamic post-translational modification governing protein abundance, function, and localization in eukaryotes. The Ubiquitin protein is conjugated to lysine residues of target proteins, but can also repeatedly be ubiquitinated itself, giving rise to a complex code of ubiquitin chains with different linkage types. To enable studying the cellular dynamics of linkage-specific ubiquitination, light-activatable polyubiquitin chain formation is reported here.

View Article and Find Full Text PDF

The difficulties of rehabilitation after anterior cruciate ligament (ACL) injuries, subsequent return-to-sport (RTS) let alone achieving pre-injury performance, are well known. Isokinetic testing is often used to assess strength capacities during that process. The aim of the present machine learning (ML) approach was to examine which isokinetic data differentiates athletes post ACL reconstruction (ACLR) and healthy controls.

View Article and Find Full Text PDF

Kynurenine pathway dysregulation as a mechanistic link between cognitive impairment and brain damage: Implications for multiple sclerosis.

Brain Res

December 2024

Research Group 'Sports Medicine', Institute for Sport and Sport Science, TU Dortmund University, Otto-Hahn-Str. 3, Dortmund 44227, Germany. Electronic address:

Cognitive impairment is a core symptom of multiple sclerosis (MS), resulting from inflammation-related brain damage and brain network dysfunction. Inflammation also causes dysregulation of the kynurenine pathway which is the primary route of tryptophan catabolism. Kynurenine pathway dysregulation is characterised by a shift in concentrations of tryptophan catabolites, also referred to as kynurenines.

View Article and Find Full Text PDF

Protein-free catalysis of DNA hydrolysis and self-integration by a ribozyme.

Nucleic Acids Res

December 2024

Biomimetic Chemistry, Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Str. 4a, Dortmund 44227, Germany.

Group II introns are ancient self-splicing ribozymes and retrotransposons. Though long speculated to have originated before translation, their dependence on intron-encoded proteins for splicing and mobility has cast doubt on this hypothesis. While some group II introns are known to retain part of their catalytic repertoire in the absence of protein cofactors, protein-free complete reverse splicing of a group II intron into a DNA target has never been demonstrated.

View Article and Find Full Text PDF

PSMA-Targeting Imprinted Nanogels for Prostate Tumor Localization and Imaging.

Adv Healthc Mater

December 2024

State Key Laboratory of Organic-Inorganic Composites, International Joint Bioenergy Laboratory of Ministry of Education, National Energy Research and Development Center for Biorefinery, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China.

Prostate-specific membrane antigen (PSMA) is overexpressed in prostate cancer cells and tumor vasculature, making it an important biomarker. However, conventional PSMA-targeting agents like antibodies and small molecules have limitations. Antibodies exhibit instability and complex production, while small molecules show lower specificity and higher toxicity.

View Article and Find Full Text PDF

Associative learning via eyeblink conditioning differs by age from infancy to adulthood.

Commun Psychol

December 2024

Clinical Child and Adolescent Psychology, Mental Health Research and Treatment Center, Faculty of Psychology, Ruhr University Bochum, Bochum, Germany.

Associative learning is a key feature of adaptive behaviour and mental health, enabling individuals to adjust their actions in anticipation of future events. Comprehensive documentation of this essential component of human cognitive development throughout different developmental periods is needed. Here, we investigated age-related changes in associative learning in key developmental stages, including infancy, childhood, adolescence, and adulthood.

View Article and Find Full Text PDF

Latent Dirichlet allocation (LDA) is a popular method for analyzing large text corpora, but it suffers from instability due to its reliance on random initialization. This results in different outcomes for replicated runs, hindering reproducibility. To address this, we introduce LDAPrototype, a new approach for selecting the most representative LDA run from multiple replications on the same dataset.

View Article and Find Full Text PDF

Background: Multiple Sclerosis (MS) represents a neuroinflammatory autoimmune disease characterized by the predominance of circulating T cell subsets with proinflammatory characteristics and increased central nervous system (CNS)-homing potential. Substantial evidence confirms various beneficial effects of chronic exercise interventions in MS, but it is unknown how long-term multi-modal intense exercise affects MS-associated lymphocytes that are commonly targeted by medication in persons with relapsing remitting MS (pwRRMS).

Methods: A total of 45 participants with defined RRMS were randomized to either the exercise (n = 22) or passive waitlist-control group (n = 23).

View Article and Find Full Text PDF

Humans have to deal with conflicting information. This is studied in conflict tasks such as the Simon task or the flanker task. For example, participants respond with the left or right hand to the color of a stimulus (task-relevant stimulus feature) which is presented in a left or right position (irrelevant feature) in the Simon task or to a letter (relevant) which is flanked by same or different letters (irrelevant) in the flanker task.

View Article and Find Full Text PDF

The critical micelle concentration is an important property of supramolecular detergents. Two dynamic light scattering approaches have been developed for critical micelle concentration analysis, i. e.

View Article and Find Full Text PDF
Article Synopsis
  • Ordinal responses are common in psychology and traditionally analyzed using parametric models, but machine learning methods like random forests are gaining traction for better predictive capabilities.
  • Despite random forests not inherently handling ordinality, a new method called Frequency-Adjusted Borders Ordinal Forest (fabOF) has been proposed to enhance predictive performance without extensive optimization.
  • The study highlights important predictors of student performance, such as interest in higher education and mother's education, and provides an R package for implementing this new methodology.
View Article and Find Full Text PDF

Effect of physical exercise training on neural activity during working memory in major depressive disorder.

J Affect Disord

December 2024

Clinical Psychology and Psychotherapy, Department of Education and Psychology, Freie Universität Berlin, Berlin, Germany; Institute of Psychology, Department of Educational Sciences and Psychology, TU Dortmund University, Dortmund, Germany.

Article Synopsis
  • The study investigates how physical exercise impacts working memory (WM) and brain activity in patients with Major Depression Disorder (MDD), focusing on the hippocampus.
  • A total of 86 MDD patients participated in a 12-week program, divided into high intensity exercise (HEX), low intensity exercise (LEX), and a waiting list control group, with an n-back WM task used to measure cognitive performance before and after interventions.
  • Results showed that both exercise groups improved their WM performance, particularly the HEX group, which also exhibited increased neural activation in the left hippocampus, though there were no significant structural changes in brain volume.
View Article and Find Full Text PDF

Search for an eV-Scale Sterile Neutrino Using Improved High-Energy ν_{μ} Event Reconstruction in IceCube.

Phys Rev Lett

November 2024

Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.

Article Synopsis
  • * The study introduces enhanced modeling techniques for neutrino flux and detector response, and it distinguishes between starting (inside) and throughgoing (outside) neutrino interaction events to improve energy resolution.
  • * The findings indicate a best-fit point for the 3+1 model with sin²(2θ_{24})=0.16 and Δm_{41}²=3.5 eV², supporting previous studies while showing consistency with no evidence of sterile neutrinos, as reflected
View Article and Find Full Text PDF
Article Synopsis
  • - The study focuses on embedding fullerenes into a chiral environment to create unique materials with applications in chiroptical technology and enantioselective catalysts, as well as understanding chirality-induced spin selectivity (CISS).
  • - Researchers designed a chiral Pd2L4 capsule using a special 'ribbon-shaped' ligand derived from Tröger's base naphthalimide, which offers a compact structure with a significant inner cavity for hosting fullerenes.
  • - The binding of fullerenes like C60, C70, and corannulenes in acetonitrile results in measurable changes in their optical properties, demonstrating the induction of circular dichroism (CD) that was confirmed through X-ray
View Article and Find Full Text PDF

Synthesis and catalytic testing of the first hydrophilic derivative of Shvo's catalyst.

Chem Commun (Camb)

December 2024

TU Dortmund University, Department for Biochemical and Chemical Engineering, Laboratory of Industrial Chemistry, Emil-Figge-Straße 66, 44227 Dortmund, Germany.

Article Synopsis
  • Shvo's catalyst has been used widely in chemical reactions but lacked modifications for solubility in polar solvents until recently.
  • This study presents the simple synthesis of a disulfonate version of Shvo's catalyst, enabling the (de-)hydrogenation of aldehydes and ketones in water.
  • The research also demonstrates a method for recycling the catalyst effectively.
View Article and Find Full Text PDF

Investigating interaction effects of social risk factors and exposure to air pollution on pediatric lymphoma cancer in Georgia, United States.

Spat Spatiotemporal Epidemiol

November 2024

Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA; Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA.

Childhood cancer constitutes a major cause of death in children. In a recent study of the Georgia Cancer Registry, joint exposures to environmental and social/behavioral stressors were associated with spatial clustering of lymphomas and reticuloendothelial neoplasms among the 159 counties in Georgia, USA. The present study aims to further investigate these associations on a more granular level.

View Article and Find Full Text PDF