1,109 results match your criteria: "NTNU- Norwegian University of Science and Technology.[Affiliation]"

Background: The healthcare sector is a complex domain that faces challenges in effectively learning from practices and outcome data. The Learning Health System (LHS) has emerged as a potential framework to improve healthcare by promoting continuous learning. However, its adoption remains limited, often involving only a single clinical department or a part of the LHS cycle.

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  • Many studies rely on a single blood sample to assess long-term exposure to substances like PFOA, but this approach may not accurately reflect true long-term exposure levels.
  • A simulation study was conducted to evaluate how well these single samples represent over-time PFOA concentrations, comparing misclassification rates between short and long-term exposure data.
  • For the general population in Norway, while single baseline samples often aligned closely with repeated samples taken up to 13 years apart, they were less reliable for representing average exposure across longer periods, especially during times of significant PFOA level changes.
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The nearest taxon index (NTI) and beta nearest taxon index (βNTI) are popular metrics used to infer community assembly in a variety of ecosystems. However, the dependence these metrics have on the underlying phylogenetic tree is often overlooked and can potentially lead to erroneous conclusions. In this paper, we investigated how misclassified sequences in the phylogenetic tree and reduction of the metacommunity richness affect estimates of the assembly processes.

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Warming and trophic structure tightly control phytoplankton bloom amplitude, composition and succession.

PLoS One

October 2024

MARBEC (Marine Biodiversity, Exploitation and Conservation), Univ Montpellier, CNRS, Ifremer, IRD, Montpellier, France.

To better identify the responses of phytoplankton blooms to warming conditions as expected in a climate change context, an in situ mesocosm experiment was carried out in a coastal Mediterranean lagoon (Thau Lagoon, South of France) in April 2018. Our objective was to assess both the direct and indirect effects of warming on phytoplankton, particularly those mediated by top-down control. Four treatments were applied: 1) natural planktonic community with ambient water temperature (C); 2) natural planktonic community at +3°C elevated temperature (T); 3) exclusion of larger zooplankton (> 200 μm; mesozooplankton) leaving microzooplankton predominant with ambient water temperature (MicroZ); and 4) exclusion of larger zooplankton (> 200 μm; mesozooplankton) at +3°C elevated temperature (TMicroZ).

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Healthcare professionals' experience with nutritional care beyond formal quality systems - A qualitative study.

Int J Nurs Stud

December 2024

Centre for Care Research, Department of Health Science in Gjøvik, Faculty of Medicine and Health Science, NTNU - Norwegian University of Science and Technology, Gjøvik, Norway; SINTEF Digital, Dept. of Health Research, Trondheim, Norway.

Background: Numerous formal strategies, screening tools, and interventions have been used to prevent malnutrition in long-term care patients. Despite these efforts, the proportion of screened patients is low, and a large proportion are malnourished. Previous research has revealed that healthcare professionals use a broad approach in their nutritional care but has also emphasised the need for further investigation into these approaches.

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Micellar Nanogels from Alginate-Based Diblock Copolysaccharides.

Biomacromolecules

October 2024

Université de Bordeaux, CNRS, Bordeaux INP, Laboratoire de chimie des polymères organiques (LCPO), UMR 5629, F-33600 Pessac, France.

Article Synopsis
  • Alginates are marine polysaccharides that can bind calcium ions and form hydrogels, making them useful in the biomedical field, though their production as nanogels is difficult.
  • The study introduces a self-assembly method to create stable alginate-based nanogels by combining guluronate blocks from alginates with dextran chains, resulting in micellar structures in the presence of divalent ions.
  • Using techniques like dynamic light scattering and small-angle neutron scattering, researchers found that these micelles have a consistent size of about 8 nm and can exchange ions, demonstrating dynamic behavior even in the presence of agents that can disassemble them.
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In recent years, many countries have significantly increased military spending, mainly due to geopolitical instability in several regions and the potential risk of armed conflicts spreading worldwide. In this context, understanding the nutritional needs of soldiers in different climates (warm, cold and high altitude) is important and directly impacts the performance and health of soldiers, especially in extreme environments. The amount of liquids, calories, and macro- and micronutrients contained in military rations must be determined considering the type of exercise, duration and environment.

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  • The study investigated how well the frailty index (FI) can predict functional dependency and mortality in stroke patients after 3 years.
  • The research analyzed data from the Nor-COAST study, focusing on 609 patients with various health conditions and calculating their FI based on a 36-item score.
  • Results showed that the FI was a stronger predictor of negative outcomes than the premorbid modified Rankin scale (mRS), suggesting it may be more useful for assessing stroke prognosis.
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  • * The study analyzes how point defects, specifically Li and O vacancies, affect the electronic structure at neutral domain walls in LiNbO, with findings indicating that these defects can enable n- or p-type conductivity.
  • * The research suggests that by controlling point defect populations through methods like thermal annealing and electric fields, it's possible to achieve reversible tuning between n- and p-type conduction, paving the way for rewritable pn-junctions in applications.
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In the entorhinal cortex (EC), attempts have been made to identify the human homologue regions of the medial (MEC) and lateral (LEC) subregions using either functional magnetic resonance imaging (fMRI) or diffusion tensor imaging (DTI). However, there are still discrepancies between entorhinal subdivisions depending on the choice of connectivity seed regions and the imaging modality used. While DTI can be used to follow the white matter tracts of the brain, fMRI can identify functionally connected brain regions.

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  • Functional amyloids, essential for the well-being of organisms from bacteria to humans, differ from disease-related amyloids by having their fibrillation regulated by cellular mechanisms and specific sequences, including gatekeeper residues such as Asp.
  • Research on the functional amyloid CsgA from E. coli revealed that adding more Asp gatekeepers reduces fibrillation by mainly influencing the initial formation of aggregates, while established fibrils remain stable.
  • NMR analysis indicated that even with added gatekeepers, CsgA retains its intrinsically disordered nature; however, there is a notable decrease in transient interactions between monomeric CsgA and its fibrils, showcasing the significance of these interactions in the fibrillation process.
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  • Lithium dendrite growth in solid-state electrolytes is a major barrier to developing safe and effective all-solid-state lithium batteries due to the risk of electrolyte fractures.* -
  • The study utilizes advanced microscopy techniques to explore the microscopic mechanisms behind these fractures, revealing strain patterns and changes in lattice orientation related to dendrite growth.* -
  • Notably, dislocations were observed near dendrite tips, indicating that the mechanical stress from expanding dendrites could cause dislocations, which may influence how dendrites grow and branch.*
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  • The study examined the prevalence of diagnosed and undiagnosed diabetes mellitus (DM) in patients undergoing elective abdominal aortic aneurysm repair and its impact on perioperative complications.* -
  • Out of 877 patients screened, 15% were found to have DM, with 25% being undiagnosed prior to surgery; however, DM was not significantly linked to increased in-hospital complications or mortality rates.* -
  • Post-analysis suggested that newly diagnosed DM patients had a higher risk of organ-related complications, indicating the importance of early detection before surgery.*
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Objectives: To assess the ability of baseline serum biomarkers to predict disease activity and remission status in juvenile idiopathic arthritis (JIA) at 18-year follow-up (FU) in a population-based setting.

Methods: Clinical data and serum levels of inflammatory biomarkers were assessed in the longitudinal population-based Nordic JIA cohort study at baseline and at 18-year FU. A panel of 16 inflammatory biomarkers was determined by multiplexed bead array assay.

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School absence policy and healthcare use: a difference-in-difference cohort analysis.

Fam Pract

September 2024

General Practice Research Unit, Department of Public Health and Nursing, NTNU Norwegian University of Science and Technology, Post box 8905, 7491 Trondheim, Norway.

Background: A national policy in Norway demanding certificates for medical absences in upper secondary school was implemented in 2016, leading to an increase in general practitioner (GP) visits in this age group.

Objectives: To assess the policy's effect on the use of primary and specialist healthcare.

Methods: A cohort study following all Norwegian youth aged 14-21 in the years 2010-2019 using a difference-in-differences approach comparing exposed cohorts expected to attend upper secondary school after the policy change in 2016 with previous unexposed cohorts.

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The explicit bonding reaction ensemble Monte Carlo method.

J Chem Phys

September 2024

Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 40 Prague 2, Czech Republic.

We present the explicit bonding Reaction ensemble Monte Carlo (eb-RxMC) method, designed to sample reversible bonding reactions in macromolecular systems in thermodynamic equilibrium. Our eb-RxMC method is based on the reaction ensemble method; however, its implementation differs from the latter by the representation of the reaction. In the eb-RxMC implementation, we are adding or deleting bonds between existing particles, instead of inserting or deleting particles with different chemical identities.

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Deep-learning-based image reconstruction with limited data: generating synthetic raw data using deep learning.

MAGMA

December 2024

Department of Radiology and Nuclear Medicine, St Olav's University Hospital, Postboks 3250 Torgarden, 7006, Trondheim, Norway.

Article Synopsis
  • Deep learning can enhance MRI reconstruction speed, but it relies on large raw datasets, which aren't always available; this study explores using synthetic data as a supplement.
  • An adversarial auto-encoder was employed to create synthetic raw data from magnitude images for MRI reconstruction tasks, evaluating the impact of incorporating this synthetic data alongside limited training datasets.
  • Results indicated that using synthetic data reduced reconstruction errors in small training sets, improving mean absolute error by up to 7.5%, while larger sets showed a slight increase in error, highlighting the benefits of using readily available magnitude data.
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  • Adaptive Laboratory Evolution (ALE) enhances the performance of microorganisms for sustainable industrial processes, like wine fermentation, but can face challenges due to randomness and genetic factors.
  • Researchers developed a new ALE platform that allows for large-scale, parallel clonal evolution, successfully evolving ten yeast populations with improved traits for wine fermentation.
  • The study found that the optimized yeast strains not only displayed better fermentation performance in larger cultures but also suggested that this high-throughput ALE approach could lead to faster advancements in microbial optimization.
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A chemo-enzymatic method for preparation of saturated oligosaccharides from alginate and other uronic acid-containing polysaccharides.

Carbohydr Polym

November 2024

Norwegian Biopolymer Laboratory (NOBIPOL), Department of Biotechnology and Food Science, NTNU Norwegian University of Science and Technology, Sem Sælands vei 6-8, N-7491 Trondheim, Norway. Electronic address:

Oligosaccharides from uronic acid-containing polysaccharides can be produced either by chemical or enzymatic degradation. The benefit of using enzymes, called lyases, is their high specificity for various glycosidic linkages. Lyases cleave the polysaccharide chain by an β-elimination reaction, yielding oligosaccharides with an unsaturated sugar (4-deoxy-l-erythro-hex-4-enepyranosyluronate) at the non-reducing end.

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Fucoidans, a group of high molecular weight polysaccharides derived mainly from brown algae, are characterized by their high fucose content, degree of sulfation (DS), and intra- and interspecific structural variation. Fucoidans are increasingly recognized due to various reported bioactivities, potentially beneficial for human health. To unlock their potential use within biomedical applications, a better understanding of their structure-functional relationship is needed.

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Background: A novel technique for injection of OnabotulinumtoxinA (BTA) towards the sphenopalatine ganglion (SPG) has shown promise in refractory chronic migraine (CM) and chronic cluster headache (CCH). Open label safety and efficacy data are presented here.

Methods: Patients with refractory CM or CCH who had received at least one injection and completed headache diaries were included.

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  • The study aimed to analyze migraine medication usage across the entire Norwegian population from 2010 to 2020 using data from the Norwegian Prescription Database.
  • A total of 327,904 individuals were identified as migraine medication users, with findings showing a slight increase in prevalence and a notable rise in the use of preventive treatments, particularly among women.
  • The research highlights that while overall migraine treatment prevalence is low, triptan overuse is common in women, prompting the need for clinicians to be more proactive in preventing this issue and tailoring treatments effectively.
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Objective: To assess the validity of the Ekblom-Bak cycle ergometer test in patients with cardiovascular disease admitted to cardiac rehabilitation.

Methods: Estimated peak oxygen consumption from the Ekblom-Bak test was compared with directly measured peak oxygen consumption from a treadmill cardiopulmonary exercise test. Patients completed the cardiopulmonary exercise test first, followed by the Ekblom-Bak test after 24 h rest.

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