5,055 results match your criteria: "Canada G1V 0A6 ; Centre de Recherche du CHU de Québec[Affiliation]"

The Effect of Relative Humidity on Creep Behavior of Cement Paste Microprism.

Materials (Basel)

January 2025

Department of Civil Engineering, Laval University, Québec City, QC G1V 0A6, Canada.

Despite decades of extensive studies, the mechanism of concrete creep remains a subject of debate, mainly due to the complex nature of cement microstructure. This complexity is further amplified by the interplay between water and the cement microstructure. The present study aimed to better understand the creep mechanism through creep tests on microprisms of cement paste at hygral equilibrium.

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This study explores the optimisation of rearing substrates for black soldier fly larvae (BSFL). First, the ideal dry matter content of substrates was determined, comparing the standard 30% dry matter (DM) with substrates hydrated to their maximum water holding capacity (WHC). Substrates at maximal WHC yielded significantly higher larval survival rates ( = 0.

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In Vitro Insights into Bacteriocin-Mediated Modulation of Chicken Cecal Microbiota.

Int J Mol Sci

January 2025

Food Science Department, Food and Agriculture Faculty, Université Laval, Quebec, QC G1V 0A6, Canada.

Reducing the use of antibiotics in animal husbandry is essential to limit the spread of resistance. A promising alternative to antibiotics resides in bacteriocins, which are antimicrobial peptides produced by bacteria showing a great diversity in terms of spectrum of activity, structure, and mechanism of action. In this study, the effects of diverse bacteriocins on the composition and metabolic activity of chicken cecal microbiota were examined in vitro, in comparison with antibiotics.

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: The global spread of carbapenem-resistant (CRPA) warrants collaborative action. Guidance should come from integrated One Health surveillance; however, a surveillance strategy is currently unavailable due to insufficient knowledge on the sources and transmission routes of CRPA. The aim of the SAMPAN study ("A Smart Surveillance Strategy for Carbapenem-resistant ") is to develop a globally applicable surveillance strategy.

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: Traumatic brain injury (TBI) occurs after a sudden mechanical force to the skull and represents a significant public health problem. Initial brain trauma triggers secondary pathophysiological processes that induce structural and functional impairment of the central nervous system, even in the regions distant to the lesion site. Later in life, these changes can be manifested as neurodegenerative sequalae that commonly involve proteinopathies, such as transactive DNA-binding protein 43 (TDP-43).

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: Rising costs and demands for improved quality of care present complex challenges for existing healthcare systems. The strain on healthcare resources is exacerbated by the increasing complexity of patient conditions. The Diagnosis-Related Group (DRG) system classifies inpatients according to clinical and treatment criteria, controls healthcare expenditures, and ensures the sustainability of procedures.

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High fructose rewires gut glucose sensing via glucagon-like peptide 2 to impair metabolic regulation in mice.

Mol Metab

January 2025

Québec Heart and Lung Institute Research Center, Université Laval - 2725, Ch. Sainte-Foy, Québec, QC, Canada, G1V 4G5; Department of Medicine, Faculty of Medicine, Université Laval - 1050 Av. de la Médecine, Québec, QC, Canada, G1V 0A6; Institute of Nutrition and Functional Foods, Université Laval - 2440 Bd. Hochelaga, Québec, QC, Canada, G1V 0A6. Electronic address:

Background: Increased fructose consumption contributes to type 2 diabetes (T2D) and metabolic dysfunction-associated steatotic liver disease (MASLD), but the mechanisms are ill-defined. Gut nutrient sensing involves enterohormones like Glucagon-like peptide (Glp)2, which regulates the absorptive capacity of luminal nutrients. While glucose is the primary dietary energy source absorbed in the gut, it is unknown whether excess fructose alters gut glucose sensing to impair blood glucose regulation and liver homeostasis.

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Background: Adjuvant endocrine therapy (AET) is prescribed for 5-10 years to women with hormone-sensitive breast cancer to prevent recurrence. However, a significant proportion of women do not adhere to AET. We developed SOIE, a one-year program designed to enhance the AET experience and adherence.

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Exoskeletons are used in rehabilitation centers for people with spinal cord injuries (SCI) due to the potential benefits they offer for locomotor rehabilitation. The acceptability of exoskeletons is crucial to promote rehabilitation and to ensure a successful implementation of this technology. The objective was to explore the acceptability of overground wearable powered exoskeleton used in rehabilitation among people with SCI.

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Design, development and performance of a Fe-Mn-Si-Cu alloy for bioabsorbable medical implants.

J Mater Chem B

January 2025

SAES Getters S.p. A., Viale Italia 77, 20045 Lainate (MI), Italy.

Bioabsorbable metallic alloys constitute a very challenging and innovative field, mainly aimed to develop the next generation of temporary medical implants. Degradation data, biological and tests are of major importance in particular for complex alloys, in which the individual element additions could enhance material performance and add functionalities. In this study, a novel Fe-Mn-Si-Cu alloy was carefully designed for vascular and blood-contact applications, and its microstructure, mechanical behavior, degradation behavior and biological performances were investigated accordingly.

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This study was realized to evaluate the influence of monensin, virginiamycin,trace minerals and yeast combination on animal performance, feed efficiency, in situ digestibility, feeding behavior, and carcass and meat characteristics from bulls finished in feedlot fed high-grain diet. A total of 36 (European vs. Nellore) bulls at 24 ± 3.

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Nanoplastics in focus: Exploring interdisciplinary approaches and future directions.

NanoImpact

January 2025

Géosciences Rennes, CNRS/Université Rennes, 263 av. Général Leclerc, 35000 Rennes, France.

Nanoplastics (NPs) are gaining increasing attention due to their widespread distribution and potential environmental and biological impacts. Spanning a variety of ecosystems - from soils and rivers to oceans and polar ice - NPs interact with complex biological and geochemical processes, posing risks to organisms across multiple trophic levels. Despite their growing presence, understanding the behavior, transport, and toxicity of nanoplastics remains challenging due to their diverse physical and chemical properties as well as the heterogeneity of environmental matrices.

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Cardiotoxicity, cardiovascular diseases (CVDs), hypertension, hepatotoxicity, and respiratory problems occurring several months to several years post-chemotherapy and/or radiotherapy are increasingly documented by scientists and clinicians. Anthracyclines, for example, were discovered in the late 1960s to be dose-dependently linked to induced cardiotoxicity, which frequently resulted in cardiomyopathy and heart failure. Most of those changes have also been associated with aging.

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GABAergic neurons in basal forebrain (BF) nuclei project densely to all layers of the mouse main olfactory bulb (OB), the first relay in odor information processing. However, BF projection neurons are diverse and the contribution of each subtype to odor information processing is not known. In the present study, we used retrograde and anterograde tracing methods together with whole-brain light-sheet analyses, patch-clamp recordings coupled with optogenetic and chemogenetic approaches during spontaneous odor discrimination, and go/no-go odor discrimination/learning tests to characterize the synaptic targets in the OB of BF calretinin-expressing (CR+) GABAergic cells and to reveal their functional implications.

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Although the 16S (and 18S) rRNA gene has been an essential tool in classifying prokaryotes, using a single locus to revise bacteria taxonomy can introduce unwanted artifacts. There was a recent proposition to split the Methylobacterium genus, which contains diverse plant-associated strains and is important for agriculture and biotechnology, into two genera. Resting strongly on the phylogeny of 16S rRNA, 11 species of Methylobacterium were transferred to a newly proposed genus Methylorubrum.

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Background: To align with climate goals, greenhouse gas (GHG) emissions from agriculture must be reduced significantly. Cultivated peatlands are an important source of such emissions. One proposed measure is to convert arable fields on peatlands to grassland, as the Intergovernmental Panel on Climate Change (IPCC) default emission factors (EF) for organic soils are lower from grasslands.

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Leydig cells produce hormones that are required for male development, fertility, and health. Two Leydig cell populations produce these hormones but at different times during development: fetal Leydig cells which are active during fetal life and adult Leydig cells that are functional postnatally. Historically, our ability to understand the origin and function of Leydig cells has been made difficult by the lack of genetic models to exclusively target these cells.

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Motion-less depth-selective optogenetic probe using tapered fiber and an electrically tuneable liquid crystal steering element.

Biomed Opt Express

January 2025

Center for Optics, Photonics and Lasers, Department of Physics, Engineering Physics and Optics, Université Laval, 2375 Rue de la Terrasse, Québec, Québec G1V 0A6, Canada.

A miniature electrically tuneable liquid crystal component is used to steer light from -1° to +1° and then to inject into a simple tapered fiber. This allows the generation of various propagation modes, their leakage, and selective illumination of the surrounding medium at different depth levels without using mechanical movements nor deformation. The performance of the device is characterized in a reference fluorescence medium (Rhodamine 6G) as well as in a mouse brain (medullary reticular formation and mesencephalic locomotor regions) during in-vivo experiments as a proof of concept.

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Background: Oxidative stress is strongly linked to neurodegeneration through the activation of c-Abl kinase, which arrests α-synuclein proteolysis by interacting with parkin interacting substrate (PARIS) and aminoacyl tRNA synthetase complex-interacting multifunctional protein 2 (AIMP2). This activation, triggered by ataxia-telangiectasia mutated (ATM) kinase, leads to dopaminergic neuron loss and α-synuclein aggregation, a critical pathophysiological aspect of Parkinson's disease (PD). To halt PD progression, pharmacological inhibition of c-Abl kinase is essential.

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The challenge with synthetically modified biochars is that they are notoriously difficult to characterize, and a new characterization approach that circumvents the challenges posed by overlapping bands in IR spectra is needed. We report multinuclear NMR approaches successful in the easy identification and quantification of covalently-bound functional groups on the biochar surface using P{H} CPMAS NMR spectroscopy.

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Exploring novel antifungal peptides from peptic hydrolysis of chicken cruor protein via regression-based machine learning approach.

Food Chem

December 2024

Institute of Nutrition and Functional Foods (INAF), Université Laval, Quebec City, QC G1V 0A6, Canada; Laboratoire de Transformation Alimentaire et Procédés ÉlectroMembranaires (LTAPEM, Laboratory of Food Processing and Electro-Membrane Processes), Food Science Department, Université Laval, Quebec City, QC G1V 0A6, Canada. Electronic address:

There is a growing interest in natural preservatives driven by consumer demand for clean-label products. In Canada, approximately 48 million liters of blood are produced annually during chicken slaughter, offering an opportunity to valorize cruor, the solid blood component rich in hemoglobin, for use in food preservation. This study investigated the hydrolysis of chicken cruor with pepsin at pH 2, 3, 4, and 5 for 180 min to produce antimicrobial peptides.

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The role of meal timing in appetitive responses to acute exercise in adolescents with and without obesity: A systematic review and meta-analysis.

J Nutr

January 2025

Clermont Auvergne University, EA 3533, Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological Conditions (AME2P), CRNH Auvergne, Clermont-Ferrand, France; International Research Chair Health in Motion, Clermont Auvergne University Foundation, Clermont-Ferrand, France.

Physical activity has been shown to improve various aspects of metabolic health and is frequently applied as an intervention in the management and prevention of overweight/obesity. Chrono-exercise can be studied in relation to time of day and timing in relation to a meal, which encompasses chronology and duration of the temporal interval, but the latter has received limited attention to date. This brief review and meta-analysis investigates whether the timing of a meal subsequent to acute exercise, in children and adolescents with and without overweight/obesity, moderates eating behaviour and appetite.

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Developmental exposure to legacy environmental contaminants, medial temporal lobe volumes and spatial navigation memory in late adolescents.

Environ Res

January 2025

Département de Psychologie, Université du Québec à Montréal, C.P. 8888 succursale Centre-ville, Montréal, Québec, H3C 3P8, Canada; Centre de Recherche du CHU Sainte-Justine, 3175, Chemin de La Côte-Sainte-Catherine, Montréal, Québec, H3T 1C5, Canada. Electronic address:

Exposure to lead, mercury, and polychlorinated biphenyls (PCBs) has been causally linked to spatial memory deficits and hippocampal changes in animal models. The Inuit community in Northern Canada is exposed to higher concentrations of these contaminants compared to the general population. This study aimed to 1) investigate associations between prenatal and current contaminant exposures and medial temporal brain volumes in Inuit late adolescents; 2) examine the relationship between these brain structures and spatial memory; and 3) assess the mediating role of brain structures in the association between contaminant exposure and spatial memory.

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A ten-year prospective randomized trial comparing non-operative treatment to hook plate fixation for Rockwood III acromio-clavicular dislocation.

Orthop Traumatol Surg Res

January 2025

Faculté de médecine Université Laval, Pavillon Ferdinand-Vandry, 1050 avenue de la Médecine, Québec, Québec G1V 0A6, Canada; Département de chirurgie Université Laval, Pavillon Ferdinand-Vandry, 1050 avenue de la Médecine, Québec, Québec G1V 0A6, Canada; Centre de Recherche CHU de Québec Université Laval, Axe Médecine Régénératrice, 2705 Bd Laurier, Québec, Québec G1V 4G2, Canada. Electronic address:

Background: Despite new modern surgical techniques, no short-term functional differences have been demonstrated between operative and non-operative treatment for acute acromio-clavicular (AC) dislocations Rockwood III-V. Few studies describe the long-term clinical and radiological results of these lesions. We aim to compare the one- and ten-year outcome of patients either treated non-operatively or with hook plate fixation for Rockwood III AC lesions.

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