Publications by authors named "Walther A"

Objectives: When health fluctuates recurrently estimating quality-of-life is challenging, risking over/underestimation due to measures' recall periods and timing. To inform how/when to capture quality-of-life, we compare responses using different recall periods and assessment timings.

Methods: For one 3-week chemotherapy cycle, cancer patients were randomly assigned to complete EQ-5D-5L or SF-12v2 (daily with a daily recall, and weekly with a weekly recall, and at 3-weeks with a 3-week recall); a third group completed SF-12v2 daily with a 3-week recall.

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A family of Pd cages prepared from ligands based on an axially chiral diamino-[1,1'-biazulene] motif (serving as a unique azulene-based surrogate of the ubiquitous BINOL moiety) is reported. We show that preparing a cage starting from the racemate of a shorter bis-monodentate ligand derivative, equipped with pyridine donor groups, leads to integrative ("social") chiral self-sorting, exclusively yielding the product, but only in a selection of solvents. This phenomenon is driven by individual solvent molecules acting as hydrogen bonding tethers between the amino groups of neighboring ligands, thereby locking the final coordination cage in a single isomeric form.

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Here, we report the synthesis of a family of chiral ZnL tetrahedral cages by subcomponent self-assembly. These cages contain a flexible trialdehyde subcomponent that allows them to adopt stereochemically distinct configurations. The incorporation of enantiopure 1-phenylethylamine produced Δ and Λ enantiopure cages, in contrast to the racemates that resulted from the incorporation of achiral 4-methoxyaniline.

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Purpose: Postoperative delirium (POD) in patients with obstructive sleep apnea (OSA) is associated with increased mortality and healthcare costs. In this study, we investigated the association of OSA risk, serum biomarkers for central nervous ischemia (S100B and NSE), and POD.

Methods: After research ethics approval, patients completed the STOP BANG assessment before undergoing elective surgery.

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Mechanical metamaterials achieve unprecedented mechanical properties through their periodically interconnected unit cell structure. However, their geometrical design and resulting mechanical properties are typically fixed during fabrication. Despite efforts to implement covalent adaptable networks (CANs) into metamaterials for permanent shape reconfigurability, emphasis is given to global rather than local shape reconfiguration.

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Article Synopsis
  • Clomipramine (CLOMI) is effective for premature ejaculation but may cause erectile dysfunction, while yohimbine (YOH) helps with erectile dysfunction and could boost libido; combining both drugs may harness their benefits.
  • In a study with 15 healthy male subjects, researchers analyzed how these drugs interact when taken together, assessing their pharmacokinetics and safety profiles through various plasma sampling methods.
  • Results indicated a significant interaction with YOH when combined with CLOMI, suggesting competitive inhibition of YOH metabolism by CLOMI, but this interaction is considered minor according to regulatory guidelines, which supports further studies on their combined efficacy.
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Global functional adaptation after local mechanical stimulation, as in mechanobiology and the mimosa plant, is fascinating and ubiquitous in nature. This is achieved by locally sensing mechanical deformation with precise thresholds, processing this information via biochemical circuits, followed by downstream actuation. The integration of such embodied intelligence allowing for mechano-to-chemo-to-function information-processing remains elusive in man-made systems.

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Depression has been associated with subclinical hypothyroidism and altered hypothalamic-pituitary-thyroid axis functioning. Adequate iodine nutrition is essential for healthy thyroid functioning. We therefore determined associations of iodine and thyroid status with paediatric major depressive disorder (pMDD) among Swiss adolescents and explored whether associations are sex-specific and mediated by stress.

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  • Surgical biopsy (SB) has traditionally been used for diagnosing pediatric solid tumors, but newer image-guided techniques like core needle biopsy (CNB) show promise due to lower risks and similar diagnostic accuracy.
  • A systematic review of studies from 2010 to 2023 included 27 studies with nearly 2,500 pediatric patients and compared complication rates and diagnostic efficacy of CNB versus SB across various tumor types.
  • Results indicated that while CNB had a 90.8% diagnostic success rate and much lower complication rate (2.9%) compared to SB (21.4% complication rate), the overall diagnostic success was notably higher for SB (98.8%).
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Cell deformability of all major blood cell types is increased in depressive disorders (DD). Furthermore, impaired glucocorticoid secretion is associated with DD, as well as depressive symptoms in general and known to alter cell mechanical properties. Nevertheless, there are no longitudinal studies examining accumulated glucocorticoid output and depressive symptoms regarding cell deformability.

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Research suggests that male-specific psychotherapy approaches for major depressive disorder (MDD) that consider traditional masculinity ideologies (TMI) may achieve improved treatment efficacy and reduced therapy dropout. However, studies examining male-specific psychotherapy for MDD or specific therapy aspects remain lacking. An anonymous online study on men's mental health examined 152 self-reporting mentally distressed cisgender men ( = 25.

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The ability to image tissues in three dimensions (3D) with label-free molecular contrast at the mesoscale would be a valuable capability in biology and biomedicine. Here, we introduce Raman spectral projection tomography (RSPT) for volumetric molecular imaging with optical sub-millimeter spatial resolution. We have developed a RSPT imaging instrument capable of providing 3D molecular contrast in transparent and semi-transparent samples.

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  • * Motivations and Masculinity: Common motivations for surgery included improving appearance and self-esteem, with some seeking to enhance their sexual success or masculinity, linking these desires to traditional masculine norms.
  • * Research significance: The findings suggest a relationship between men's conformity to traditional masculinity ideologies and their choices regarding cosmetic procedures, indicating that such surgeries may be used to express power and dominance in a competitive social environment.
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  • - Ultrashort echo-time MRI offers a non-invasive method to measure tracheomalacia severity in infants with tracheoesophageal fistula and esophageal atresia (TEF/EA), aiming to clarify the link between tracheomalacia severity and esophageal atresia.
  • - A review of 16 neonate patients highlighted that those with long gap esophageal atresia exhibited significantly greater tracheomalacia severity compared to those with short gap, along with a higher rate of respiratory-related hospital admissions.
  • - Post-surgery measurements indicated that trachea eccentricity improved in the upper third but worsened in the lower third after TEF/EA repair, illustrating how surgical outcomes can vary across the tr
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DNA-based tension probes with precisely programmable force responses provide important insights into cellular mechanosensing. However, their degradability in cell culture limits their use for long-term imaging, for instance, when cells migrate, divide, and differentiate. This is a critical limitation for providing insights into mechanobiology for these longer-term processes.

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Metamaterials show elaborate mechanical behavior such as strain stiffening, which stems from their unit cell design. However, the stiffening response is typically programmed in the design step and cannot be adapted postmanufacturing. Here, we show hydrogel metamaterials with highly programmable strain-stiffening responses by exploiting the out-of-plane buckling of integrated pH-switchable hydrogel actuators.

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Defect reconstruction is essential in non-destructive testing and structural health monitoring with guided ultrasonic waves. This paper presents an algorithm for reconstructing notches in steel plates, which can be seen as artificial defects representing cracks by comparing measured results with those from a simulation model. The model contains a parameterized notch, and its geometrical parameters are to be reconstructed.

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Molecular building blocks, capable of adopting several strongly deviating conformations, are of particular interest in the development of stimuli-responsive self-assemblies. The pronounced structural flexibility of a short acridone-based bridging ligand, equipped with two monodentate isoquinoline donors, is herein exploited to assemble a surprisingly diverse series of coordination-driven Pd(II) architectures. First, it can form a highly twisted PdL helicate, transformable into the corresponding mesocate, controlled by temperature, counter anion and choice of solvent.

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Cells, the fundamental units of life, orchestrate intricate functions - motility, adaptation, replication, communication, and self-organization within tissues. Originating from spatiotemporally organized structures and machinery, coupled with information processing in signalling networks, cells embody the 'sensor-processor-actuator' paradigm. Can we glean insights from these processes to construct primitive artificial systems with life-like properties? Using de novo design approaches, what can we uncover about the evolutionary path of life? This Review discusses the strides made in crafting synthetic cells, utilizing the powerful toolbox of structural and dynamic DNA nanoscience.

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Biomolecular coacervates are emerging models to understand biological systems and important building blocks for designer applications. DNA can be used to build up programmable coacervates, but often the processes and building blocks to make those are only available to specialists. Here, we report a simple approach for the formation of dynamic, multivalency-driven coacervates using long single-stranded DNA homopolymer in combination with a series of palindromic binders to serve as a synthetic coacervate droplet.

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Precision-engineered light-triggered hydrogels are important for a diversity of applications. However, fields such as biomaterials require wavelength outside the harsh UV regime to prevent photodamage, typically requiring chromophores with extended π-conjugation that suffer from poor water solubility. Herein, we demonstrate how cyclodextrins can be used as auxiliary agents to not only solubilize such chromophores, but even to preorganize them in a 2 : 2 host-guest inclusion complex to facilitate photodimerization.

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  • Tunneled central venous catheters (CVCs) are crucial in cancer treatment for children, but there are few guidelines for their management, prompting the need for best practices.
  • The study aimed to investigate how catheter material affects complications, the risks associated with low platelet and neutrophil counts during catheter placement, and management strategies for central line associated bloodstream infections (CLABSI).
  • The findings indicate no major differences in complications based on catheter composition, suggest a slight risk increase with very low platelet counts, and recommend removing the catheter in case of complicated infections, although high-quality evidence is lacking across all areas.
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