Significantly reducing the iridium content in oxygen evolution reaction (OER) catalysts while maintaining high electrocatalytic activity and stability is a key priority in the development of large-scale proton exchange membrane (PEM) electrolyzers. In practical catalysts, this is usually achieved by depositing thin layers of iridium oxide on a dimensionally stable metal oxide support material that reduces the volumetric packing density of iridium in the electrode assembly. By comparing two support materials with different structure types, it is shown that the chemical nature of the metal oxide support can have a strong influence on the crystallization of the iridium oxide phase and the direction of crystal growth.
View Article and Find Full Text PDFBackground: High doses and prolonged duration of opioids are associated with tolerance, dependence, and increased mortality. Unfortunately, despite recent efforts to curb outpatient opioid prescribing because of the ongoing epidemic, utilization remains high in the intensive care setting, with intubated patients commonly receiving infusions with a potency much higher than doses required to achieve pain control. We attempted to use implementation science techniques to monitor and reduce excessive opioid prescribing in ventilated patients in our surgical intensive care unit (SICU).
View Article and Find Full Text PDFObjective: The number of trauma patients presenting with chronic antithrombotic therapy is on the rise. The risk of hemorrhage, the leading cause of death in trauma patients, increases for those on such therapy. This study sought to compare the clinical outcomes of patients on warfarin, direct oral anticoagulants (DOAC), or antiplatelet agents.
View Article and Find Full Text PDFThis paper aims to contribute to the theory on school-related well-being by applying a qualitative approach that focuses on children's experiences during the Covid-19 pandemic and conceptualizes them as an epistemic opportunity to reconstruct aspects of school-related well-being from children's perspectives. Within the framework of the multinational qualitative study Children's Understandings of Well-being (CUWB), it conceptualizes well-being as a cultural construct and argues for including children's voices in the process of knowledge production. By drawing on statements from online interviews with 11- to 14-year-old children from Berlin, Germany in spring 2021 during school lockdown and by using a discourse analytical approach, the paper outlines the findings on visibility as a central feature of well-being in school environments that children make relevant for experiences of agency, security, and self.
View Article and Find Full Text PDFAlthough the DSM-5 has emphasised the relevance of sensory abnormalities in autism spectrum disorders (ASD), there are hardly any measures to assess them in German speaking countries. The present study translated the "Sensory Perception Questionnaire" (SPQ) by Tavassoli et al. (2014) to German and validated this scale.
View Article and Find Full Text PDFSensory features in autism spectrum disorder (ASD) have received increasing interest in clinical work and research during the recent years. With the Sensory Perception Quotient (SPQ), Tavasolli and colleagues have produced a self-rating scale for adults with ASD that measures sensory hyper-sensitivity in different sensory modalities, without also tapping cognitive or motivational aspects that precede or follow autistic sensory experiences. Here, we present the results of a translation of the SPQ to German and its short version as well as their validation in samples of autistic or neuro-typical participants.
View Article and Find Full Text PDFGlobally, farmers cultivate and maintain crop landraces (i.e., traditional varieties).
View Article and Find Full Text PDFTwo dimensional nuclear magnetic resonance (NMR) spectroscopy is one of the major tools for analysing the chemical structure of organic molecules and proteins. Despite its power, this technique requires long measurement times, which, particularly in the recently emerging diamond based single molecule NMR, limits its application to stable samples. Here we demonstrate a method which allows to obtain the spectrum by collecting only a small fraction of the experimental data.
View Article and Find Full Text PDFWe present theoretical proposals for two-dimensional nuclear magnetic resonance spectroscopy protocols based on Nitrogen-vacancy (NV) centers in diamond that are strongly coupled to the target nuclei. Continuous microwave and radio-frequency driving fields together with magnetic field gradients achieve Hartmann-Hahn resonances between NV spin sensor and selected nuclei for control of nuclear spins and subsequent measurement of their polarization dynamics. The strong coupling between the NV sensor and the nuclei facilitates coherence control of nuclear spins and relaxes the requirement of nuclear spin polarization to achieve strong signals and therefore reduced measurement times.
View Article and Find Full Text PDFHybridization produces strong evolutionary forces. In hybrid zones, selection can differentially occur on traits and selection intensities may differ among hybrid generations. Understanding these dynamics in crop-wild hybrid zones can clarify crop-like traits likely to introgress into wild populations and the particular hybrid generations through which introgression proceeds.
View Article and Find Full Text PDFUnderstanding the likelihood and extent of introgression of novel alleles in hybrid zones requires comparison of lifetime fitness of parents and hybrid progeny. However, fitness differences among cross types can vary depending on biotic conditions, thereby influencing introgression patterns. Based on past work, we predicted that increased competition would enhance introgression between cultivated and wild sunflower (Helianthus annuus) by reducing fitness advantages of wild plants.
View Article and Find Full Text PDF• Premise of the study: The fitness of an offspring may depend on its nuclear genetic composition (via both parental genotypes) as well as on genetic maternal effects (via only the maternal parent). Understanding the relative importance of these two genetic factors is particularly important for research on crop-wild hybridization, since traits with important genetic maternal effects (e.g.
View Article and Find Full Text PDFEducational consortiums possess significant academic and financial benefits. A faculty shortage has had an impact on subspecialty educational programs including nurse anesthesia. This column describes a collaborative "consortium" model of 3 individual nurse anesthesia educational programs located in the Philadelphia, Pennsylvania, area.
View Article and Find Full Text PDFMultiple evolutionary shifts in floral symmetry and stamen number have occurred in the snapdragon (Antirrhinum majus) family Veronicaceae. In Mohavea, Veronica and Gratiola there have been independent evolutionary reductions in stamen number and modifications to corolla shape. It is hypothesized that changes in the regulation of homologs of snapdragon dorsal flower identity genes CYCLOIDEA (CYC) and RADIALIS (RAD) underlie these floral transitions.
View Article and Find Full Text PDFContext: Michigan State University College of Osteopathic Medicine (MSUCOM) has long maintained a preceptorship program involving community-based osteopathic physicians who voluntarily provide osteopathic medical students with early clinical experiences in family practice.
Objective: To investigate the factors that influence osteopathic physicians to participate in the MSUCOM Family Medicine Preceptorship Program.
Methods: A self-administered survey consisting of 28 questions in five categories was mailed to all 177 osteopathic physicians participating in the MSUCOM Family Medicine Preceptorship Program.
Nurs Educ Perspect
September 2006
Graduate nursing education is evolving in response to multiple societal influences affecting higher education. Nurse anesthesia education has also been affected by these forces. This article describes the planning, implementation, and evaluation of a new graduate track in nurse anesthesia made possible by an academic partnership, and the positive impact that a federally funded grant had on the venture.
View Article and Find Full Text PDFKrankenpfl Soins Infirm
August 2002
The genetic analysis of human herpesvirus 8 (HHV8), also termed Kaposi's sarcoma-associated virus, has been hampered by severe difficulties in producing infectious viral particles and modifying the viral genome. In this article, we report the successful cloning of the HHV8 complete genome onto a prokaryotic F-plasmid replicon which allows the propagation of the recombinant viral DNA in Escherichia coli. The insertion of the F-plasmid into the HHV8 genome interrupts the ORF56 gene, whose expression product-by homology with the Epstein-Barr virus BSLF1 gene--is supposed to be necessary for lytic DNA replication.
View Article and Find Full Text PDFThe binding of the viral major glycoprotein BLLF1 (gp350/220) to the CD21 cellular receptor is thought to play an essential role during infection of B lymphocytes by the Epstein-Barr virus (EBV). However, since CD21-negative cells have been reported to be infectible with EBV, additional interactions between viral and cellular molecules seem to be probable. Based on a recombinant genomic EBV plasmid, we deleted the gene that encodes the viral glycoprotein BLLF1.
View Article and Find Full Text PDFThe propagation of herpesviruses has long been viewed as a temporally regulated sequential process that results from the consecutive expression of specific viral transactivators. As a key step in this process, lytic viral DNA replication is considered as a checkpoint that controls the expression of the late structural viral genes. In a novel genetic approach, we show that both hypotheses do not hold true for the Epstein-Barr virus (EBV).
View Article and Find Full Text PDFThe d4 domain, a novel zinc finger-like structural motif, was first revealed in the rat neuro-d4 protein. Here we demonstrate that the d4 domain is conserved in evolution and that three related genes form a d4 family in the human genome. The human neuro-d4 is very similar to rat neuro-d4 at both the amino acid and the nucleotide levels.
View Article and Find Full Text PDFThoracic complications associated with the use of the high-speed air turbine dental drill have been reported sporadically in the anesthesia literature. This case report documents the potential sequelae associated with air entrainment from utilization of the high-speed air turbine dental drill in general dentistry. Signs and symptoms of air entrainment include chest fullness, periorbital and facial edema, and crepitus.
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