1,378 results match your criteria: "Rijksuniversiteit[Affiliation]"

Background: Recent research suggested that hospital infections are a predictive marker for physical non-recovery one year after cardiothoracic surgery. The purpose of this study was to explore whether this risk factor is etiologic. Additional, the influence of a potential effect modifying factor, diabetes mellitus, was investigated.

View Article and Find Full Text PDF

Many youth experience mental health problems and digital games hold potential as mental health interventions. This systematic review provides an overview of randomised controlled studies assessing the effectiveness of digital applied and casual games for improving mental health in youth aged 6-24 years. A systematic search of PsycINFO, Web of Science and Pubmed yielded 145 eligible studies.

View Article and Find Full Text PDF

Charge of a transmembrane peptide alters its interaction with lipid membranes.

Colloids Surf B Biointerfaces

March 2024

J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, 182 23 Prague 8, Czech Republic; Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands. Electronic address:

Transmembrane (TM) proteins interact closely with the surrounding membrane lipids. Lipids in the vicinity of TM proteins were reported to have hindered mobility, which has been associated with lipids being caught up in the rough surface of the TM domains. These reports, however, neglect one important factor that largely influences the membrane behavior - electrostatics of the TM peptides that are usually positively charged at their cytosolic end.

View Article and Find Full Text PDF

"Tin-oxo cage" organometallic compounds are considered as photoresists for extreme ultraviolet (EUV) photolithography. To gain insight into their electronic structure and reactivity to ionizing radiation, we trapped bare gas-phase -butyltin-oxo cage dications [(BuSn)O(OH)] in an ion trap and investigated their fragmentation upon soft X-ray photoabsorption by means of mass spectrometry. In complementary experiments, the tin-oxo cages with hydroxide and trifluoroacetate counter-anions were cast in thin films and studied using X-ray transmission spectroscopy.

View Article and Find Full Text PDF

The association between childhood trauma and tobacco smoking in patients with psychosis, unaffected siblings, and healthy controls.

Eur Arch Psychiatry Clin Neurosci

October 2024

Department of Psychiatry Amsterdam, UMC (Location AMC), Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.

In patients with psychosis, rates of tobacco smoking and childhood trauma are significantly higher compared to the general population. Childhood trauma has been proposed as a risk factor for tobacco smoking. However, little is known about the relationship between childhood trauma and smoking in psychosis.

View Article and Find Full Text PDF

Source-based morphometry reveals structural brain pattern abnormalities in 22q11.2 deletion syndrome.

Hum Brain Mapp

January 2024

Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, California, USA.

Article Synopsis
  • 22q11.2 deletion syndrome (22q11DS) is the most common microdeletion in humans, linked to reduced gray matter volume and neuropsychiatric issues like cognitive impairment and psychosis.
  • A study involving 783 participants (470 with 22q11DS and 313 controls) used advanced brain imaging techniques to identify specific patterns of gray matter volume covariance associated with this syndrome.
  • Results indicated that individuals with 22q11DS show unique structural brain abnormalities, particularly in the cerebellum, and these alterations follow distinct patterns rather than a widespread decline.
View Article and Find Full Text PDF

In recent years several studies have shown that investigative journalism can lead to significant revelations in the medical sector. This specific field in journalism has become more intriguing but also more complex due to the upsurge of large-scale data and the possibilities of artificial intelligence. Collaboration appears to be the solution.

View Article and Find Full Text PDF

We present an empirically benchmarked framework for sex-specific normative modeling of brain morphometry that can inform about the biological and behavioral significance of deviations from typical age-related neuroanatomical changes and support future study designs. This framework was developed using regional morphometric data from 37,407 healthy individuals (53% female; aged 3-90 years) following a comparative evaluation of eight algorithms and multiple covariate combinations pertaining to image acquisition and quality, parcellation software versions, global neuroimaging measures, and longitudinal stability. The Multivariate Factorial Polynomial Regression (MFPR) emerged as the preferred algorithm optimized using nonlinear polynomials for age and linear effects of global measures as covariates.

View Article and Find Full Text PDF

Background: Exposure and response prevention (ERP) has been shown to be an effective treatment for Tourette syndrome (TS) and chronic tic disorders (CTD). ERP is based on voluntary tic suppression in combination with prolonged exposure to premonitory urges preceding tics. A prevailing hypothesis of the working mechanism underlying ERP in tics is habituation to the premonitory urges as a result of prolonged exposure.

View Article and Find Full Text PDF

Membrane fusion is a ubiquitous process associated with a multitude of biological events. Although it has long been appreciated that membrane mechanics plays an important role in membrane fusion, the molecular interplay between mechanics and fusion has remained elusive. For example, although different lipids modulate membrane mechanics differently, depending on their composition, molar ratio, and complex interactions, differing lipid compositions may lead to similar mechanical properties.

View Article and Find Full Text PDF

Visualizing Molecular Dynamics by High-Speed Atomic Force Microscopy.

Methods Mol Biol

November 2023

Molecular Biophysics, Zernike Instituut, Rijksuniversiteit Groningen, Groningen, The Netherlands.

Dynamic processes and structural changes of biological molecules are essential to life. While conventional atomic force microscopy (AFM) is able to visualize molecules and supramolecular assemblies at sub-nanometer resolution, it cannot capture dynamics because of its low imaging rate. The introduction of high-speed atomic force microscopy (HS-AFM) solved this problem by providing a large increase in imaging velocity.

View Article and Find Full Text PDF

Atomic Force Microscopy: An Introduction.

Methods Mol Biol

November 2023

Moleculaire Biofysica, Zernike instituut, Rijksuniversiteit Groningen, Groningen, the Netherlands.

Imaging of nano-sized particles and sample features is crucial in a variety of research fields, for instance, in biological sciences, where it is paramount to investigate structures at the single particle level. Often, two-dimensional images are not sufficient, and further information such as topography and mechanical properties are required. Furthermore, to increase the biological relevance, it is desired to perform the imaging in close to physiological environments.

View Article and Find Full Text PDF

An antibiotic from an uncultured bacterium binds to an immutable target.

Cell

September 2023

NMR Spectroscopy, Department of Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands. Electronic address:

Antimicrobial resistance is a leading mortality factor worldwide. Here, we report the discovery of clovibactin, an antibiotic isolated from uncultured soil bacteria. Clovibactin efficiently kills drug-resistant Gram-positive bacterial pathogens without detectable resistance.

View Article and Find Full Text PDF

COPD is the third most common chronic disease in the Netherlands and the number of patients is still rising. This article reviews causes of COPD, assesses the role of spirometry in diagnosing COPD, and considers ways to differentiate between COPD and heart failure, which can be difficult due to overlapping symptoms. To avoid a 'one size fits all' treatment, we elaborate on treatable traits - patient characteristics leading to specific treatment options- in order to optimize treatment for each individual patient.

View Article and Find Full Text PDF

Purpose: People with homonymous hemianopia (HH) benefit from applying compensatory scanning behaviour that limits the consequences of HH in a specific task. The aim of the study is to (i) review the current literature on task-specific scanning behaviour that improves performance and (ii) identify differences between this performance-enhancing scanning behaviour and scanning behaviour that is spontaneously adopted or acquired through training.

Materials And Methods: The databases PsycInfo, Medline, and Web of Science were searched for articles on scanning behaviour in people with HH.

View Article and Find Full Text PDF

Chromatin homeostasis mediates essential processes in eukaryotes, where histone chaperones have emerged as major regulatory factors during DNA replication, repair, and transcription. The dynamic nature of these processes, however, has severely impeded their characterization at the molecular level. Here, fluorescence optical tweezers are applied to follow histone chaperone dynamics in real time.

View Article and Find Full Text PDF

Postpartum psychosis: A proposed treatment algorithm.

J Psychopharmacol

October 2023

Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.

Background: Postpartum psychosis (PPP) is a psychiatric emergency that generally warrants acute inpatient care. PPP is marked by the sudden onset of affective and psychotic symptoms with a rapid deterioration in mental state. Evidence suggests that PPP is a discrete disorder on the bipolar disorder spectrum with a distinct treatment profile and prognosis.

View Article and Find Full Text PDF

The majority of nonbacterial gastroenteritis in humans and livestock is caused by noroviruses. Like most RNA viruses, frequent mutations result in various norovirus variants. The strain-dependent binding profiles of noroviruses to fucose are supposed to facilitate norovirus infection.

View Article and Find Full Text PDF

Tachypnoea or bradypnea in an acutely ill patient can be the first clinical sign of a life-threatening condition. A recent Dutch study shows that the respiratory rate is measured in 25% of acutely ill patients assessed at home by the GP. The study describes that the GP is able to count the respiratory rate correctly.

View Article and Find Full Text PDF

Terrestrial and sub-Neptune planets are expected to form in the inner (less than 10 AU) regions of protoplanetary disks. Water plays a key role in their formation, although it is yet unclear whether water molecules are formed in situ or transported from the outer disk. So far Spitzer Space Telescope observations have only provided water luminosity upper limits for dust-depleted inner disks, similar to PDS 70, the first system with direct confirmation of protoplanet presence.

View Article and Find Full Text PDF

Localizing leakages in large water distribution systems is an important and ever-present problem. Due to the complexity originating from water pipeline networks, too few sensors, and noisy measurements, this is a highly challenging problem to solve. In this work, we present a methodology based on generative deep learning and Bayesian inference for leak localization with uncertainty quantification.

View Article and Find Full Text PDF

Lateral membrane organization as target of an antimicrobial peptidomimetic compound.

Nat Commun

July 2023

Molecular Biophysics, Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Groningen, the Netherlands.

Antimicrobial resistance is one of the leading concerns in medical care. Here we study the mechanism of action of an antimicrobial cationic tripeptide, AMC-109, by combining high speed-atomic force microscopy, molecular dynamics, fluorescence assays, and lipidomic analysis. We show that AMC-109 activity on negatively charged membranes derived from Staphylococcus aureus consists of two crucial steps.

View Article and Find Full Text PDF

The diverse chemistry of protoplanetary disks as revealed by JWST.

Faraday Discuss

September 2023

Kapteyn Astronomical Institute, Rijksuniversiteit Groningen, P. O. Box 800, 9700 AV Groningen, The Netherlands.

Early results from the James Webb Space Telescope-Mid-InfraRed Instrument (JWST-MIRI) guaranteed time programs on protostars (JOYS) and disks (MINDS) are presented. Thanks to the increased sensitivity, spectral and spatial resolution of the MIRI spectrometer, the chemical inventory of the planet-forming zones in disks can be investigated with unprecedented detail across stellar mass range and age. Here, data are presented for five disks, four around low-mass stars and one around a very young high-mass star.

View Article and Find Full Text PDF