5,884 results match your criteria: "Bielefeld University.[Affiliation]"

The emergence of multiethnolects, i.e. specific speaking styles or varieties associated with second and third generation speakers from immigrant backgrounds, has been observed and studied in several major cities in Europe and elsewhere in the world.

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Aims: Patients with severe aortic stenosis (AS), low transvalvular flow (LF) and low gradient (LG) with normal ejection fraction (EF)-are referred to as paradoxical LF-LG AS (PLF-LG). PLF-LG patients develop more advanced heart failure symptoms and have a worse prognosis than patients with normal EF and high-gradient AS (NEF-HG). Despite its clinical relevance, the mechanisms underlying PLF-LG are still poorly understood.

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  • Scientists are trying to understand how certain factors might affect the health of mothers and babies, especially when it comes to birth weight.
  • They studied data from over 28,000 mother-baby pairs to see how being exposed to certain environmental factors could impact birth weight and the chances of low birth weight.
  • They found that small changes in exposure have a bigger effect on vulnerable groups, showing that these groups face more health challenges than others.
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  • * A study involving patients with pancreatic cancer and T2D found that higher levels of HbA1c (6.5-8.4% and ≥8.5%) were significantly associated with an increased risk of pancreatic cancer diagnosis.
  • * Among diabetes treatments, only the SGLT-2 inhibitor showed a negative association with pancreatic cancer risk, suggesting it may help reduce this risk in T2D patients.
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Background: Protein biomarkers may contribute to the identification of vulnerable subgroups for premature mortality. This study aimed to investigate the association of plasma proteins with all-cause and cause-specific mortality among individuals with and without baseline type 2 diabetes (T2D) and evaluate their impact on the prediction of all-cause mortality in two prospective Cooperative Health Research in the Region of Augsburg (KORA) studies.

Methods: The discovery cohort comprised 1545 participants (median follow-up 15.

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Understanding the genetic and fitness consequences of anthropogenic bottlenecks is crucial for biodiversity conservation. However, studies of bottlenecked populations combining genomic approaches with fitness data are rare. Theory predicts that severe bottlenecks deplete genetic diversity, exacerbate inbreeding depression and decrease population viability.

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  • The field of meta-analysis for diagnostic test accuracy studies is evolving, focusing on methods to analyze multiple thresholds of sensitivity and specificity.
  • A case study highlighted the application of various methods for meta-analyzing diagnostic test studies, but no comprehensive simulation has compared these methods systematically.
  • This article presents a simulation study that evaluates three frequentist approaches for analyzing ROC curves, finding that Hoyer et al.'s method performed the best in most scenarios and is suggested for practical use.
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Malaria poses a significant threat to pregnant women in sub-Saharan Africa, necessitating effective interventions like the intermittent preventive treatment of malaria in pregnancy with sulfadoxine-pyrimethamine (IPTp-SP). However, challenges persist in the uptake and effectiveness of this intervention. This scoping review aims to explore IPTp-SP uptake in African countries, identify influencing factors, and assess its effectiveness in preventing malaria and adverse outcomes in pregnancy.

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Photosynthetic organisms often interact with heterotrophic microbes. We here report the complete genome sequences of the bacterial strains sp. MM231 and MM232.

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  • Modern ballistocardiography (BCG) and seismocardiography (SCG) utilize acceleration sensors to track body movements caused by heartbeat and blood flow, but artifacts from sensor rotations complicate signal interpretation.
  • This observational study seeks to develop strategies for detecting and eliminating these acceleration artifacts from sensor rotation, distinguishing them from genuine heart-induced signals.
  • Data from four healthy participants will be collected during parabolic flights to analyze acceleration and angular velocity changes, leading to hypotheses about improving BCG-SCG methods using advanced multi-sensor technology.
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Community participation (CP) and empowerment (CE) have long been viewed internationally as cornerstones of comprehensive primary health care (PHC). Accordingly, policies for new PHC models in Italy, such as the Community Health Centres called "Case della Salute" in 2006 and "Case della Comunità" in 2022, highlight the importance of implementing participatory processes with communities and creating opportunities for CE. This study's objective is to identify the understandings of CP and CE that emerge among practitioners and stakeholders who design participatory approaches in PHC practice and policy in the Emilia-Romagna region in Italy.

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Background: Cardiovascular disease (CVD) is a leading cause of premature death, with hypertension, diabetes, and dyslipidemia as major risk factors. Effective self-management (SM) is crucial for controlling these conditions and improving quality of life. This study examines stakeholders' experiences and expectations of SM education to enhance program development.

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Highly Cytotoxic Cryptophycin Derivatives with Modification in Unit D for Conjugation.

Angew Chem Int Ed Engl

December 2024

Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld, Germany.

Cytotoxic payloads for drug conjugates suitable for directed tumor therapy need to be highly potent and require a functional group for conjugation with the homing device (antibody, peptide, or small molecule). Cryptophycins are cyclodepsipeptides that stand out from the realm of natural products due to their extraordinarily high cytotoxicity. However, the installation of a suitable conjugation handle without compromising the toxicity is highly challenging.

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We cultivated bacteria contained in a sandy soil sample, isolated DNA from a single bacterial colony, and assembled from genomic reads the full genome sequence of and strains, termed MM2321 and MM2322. Besides the genome sequences, the phylogenetic classifications of both strains are reported.

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  • This study examines how motor learning interacts with cognitive processes, biomechanics, and tactile feedback in a challenging bimanual task using a maze game with a rolling sphere.
  • Participants were divided into two groups based on their initial performance, and various methods were used to assess improvements in task execution through practice.
  • Results showed that better performers demonstrated superior movement strategies, improved tactile control, and more advanced cognitive mapping of the task compared to poorer performers.
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The Wildlife Malaria Network (WIMANET) is a groundbreaking multinational collaboration focused on studying vector-borne haemosporidian parasites in wildlife. Unlike human malaria, wildlife malaria is found on all continents except Antarctica, with parasites being transmitted by a range of vectors. The complexity and diversity of these parasites makes it necessary to have an interdisciplinary approach to understand and mitigate their impacts.

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pH-Responsive supramolecular vesicles for imaging-guided drug delivery: Harnessing aggregation-induced emission.

R Soc Open Sci

September 2024

School of Chemistry and Chemical Engineering, Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry, Hainan University, Haikou 570228, People's Republic of China.

The water-soluble tribenzotriquinacene-based hexacarboxylic acid ammonium salt, , acts as the host component () forming host-guest complexes with tetraphenylethylene (TPE)-functionalized monotopic and tetratopic quaternary ammonium derivatives, and , to yield supra-amphiphiles. These supra-amphiphiles self-assemble to form pH-responsive fluorescent vesicles, which have allowed us to capitalize on the aggregation-induced emission (AIE) effect for imaging-guided drug delivery systems. These systems exhibit efficient drug loading and pH-responsive delivery capabilities.

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Objective: In the ENGOT-EN6-NSGO/GOG3031/RUBY trial, dostarlimab+carboplatin-paclitaxel demonstrated significant improvement in progression free survival and a positive trend in overall survival compared with placebo+carboplatin-paclitaxel, with manageable toxicity, in patients with primary advanced or recurrent endometrial cancer. Here we report on patient-reported outcomes in the mismatch repair-deficient/microsatellite instability-high population, a secondary endpoint in the trial.

Methods: Patients were randomized 1:1 to dostarlimab+carboplatin-paclitaxel or placebo+carboplatin-paclitaxel every 3 weeks for 6 cycles followed by dostarlimab or placebo monotherapy every 6 weeks for ≤3 years or until disease progression.

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Nurses' health promotion practices in rural primary health care in Nigeria. A qualitative study.

Health Promot Int

October 2024

Department of Health Services Research and Nursing Science, School of Public Health, Bielefeld University, Universitätsstrasse 25, 33615, Bielefeld, Germany.

Nurses play a vital role in providing high-quality primary healthcare and health promotion services. The state of research highlights their often complex operational realities and shows the need for an evidence-based understanding of nurses' perspectives on health promotion practices, especially in low-resource settings. This study focuses on how community health nurses in rural primary healthcare centers in Nigeria perceive their health promotion role and the opportunities and challenges of, and potential entry points for strengthening, their practice.

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Habits are often beneficial to goal pursuit. They reduce the need for self-control by automating behavior, thereby streamlining decision-making and decreasing temptations and motivational interference. Given that habits outsource behavioral control to the environment, stable performance contexts are critical for habit formation and performance.

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The gut microbiota-immune-brain axis is a feedback network which influences diverse physiological processes and plays a pivotal role in overall health and wellbeing. Although research in humans and laboratory mice has shed light into the associations and mechanisms governing this communication network, evidence of such interactions in wild, especially in young animals, is lacking. We therefore investigated these interactions during early development in a population of common buzzards () and their effects on individual condition.

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Halogen Bonding in N-Alkyl-Bromo-/Lodo-Pyridinium Salts and its Application in Chromatography.

Chemistry

December 2024

Center for Molecular Materials, Inorganic Chemistry and Structural Chemistry Bielefeld University, Universitätsstraße 25, 33615, Bielefeld, Germany.

The alkylation of 3-/4-bromo- and -iodopyridine with methyl triflate smoothly affords the corresponding N-methylpyridinium triflate salts. An anion exchange with NaI or [PPh]Y (Y=Cl, Br, I) yields the corresponding halide salts. Most of them could be structurally characterized and their strong halogen bonds were investigated.

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Any series of sensorimotor actions shows fluctuations in speed and accuracy from repetition to repetition, even when the sensory input and motor output requirements remain identical over time. Such fluctuations are particularly prominent in reaction time (RT) series from laboratory neurocognitive tasks. Despite their omnipresent nature, trial-to-trial fluctuations remain poorly understood.

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Linking meta-learning to meta-structure.

Behav Brain Sci

September 2024

Department of Systems Physiology of Learning, Leibniz Institute for Neurobiology, Magdeburg,

We propose that a principled understanding of meta-learning, as aimed for by the authors, benefits from linking the focus on learning with an equally strong focus on structure, which means to address the question: What are the meta-structures that can guide meta-learning?

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Adducts of Lewis acidic stibanes with phosphane chalcogenides.

Dalton Trans

October 2024

Chair of Inorganic and Structural Chemistry, Center for Molecular Materials CM2, Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.

Starting from ClSbR (R = CF, 3,5-(CF)CH) and H(E)P(Bu) (E = O, S), we prepared the oxy- and sulphanediyl-bridged adducts RSb(Cl)-E-(H)P(Bu), which are stable against the elimination of HCl. The different electron-withdrawing substituents and chalcogen bridging units influence the size of the Sb-E-P angle. ClSb(CF) and BuSnH react to give HSb(CF), which seems to interact weakly with H(O)P(Bu) in solution as observed NMR.

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