119,308 results match your criteria: "Argentina; Virology Institute "Dr. J. M. Vanella"[Affiliation]"

In the management of reservoirs, different forms of infrastructure (such as dams, hydropower units, information) are functionally interdependent and often managed by different types of actors to form a social-ecological-technological system. Such interdependence also occurs because institutions (understood as rules that guide and constrain actor behavior) exist to indicate how infrastructures should be managed. We apply institutional analysis and social network analysis to identify how functionally interdependent infrastructures and actors are connected by formal rules created to manage reservoir operations in Argentina (Ameghino Dam, Chubut) and the United States (Coyote Valley Dam, California).

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Background: Patients with autoimmune rheumatic diseases (ARD) are at increased risk of infection due to their impaired immune response, which also reduces vaccination efficacy. Although several studies have evaluated the serological response to SARS-CoV-2 mRNA-based vaccines in patients with ARD, limited information on immune responses to other vaccination platforms is available.

Aims: This observational prospective study aims to investigate the humoral immune response to different SARS-CoV-2 vaccines in patients with ARD.

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Article Synopsis
  • The surgical treatment for patellar instability often involves reconstructing the medial patellofemoral ligament and may additionally require tibial tuberosity osteotomy or trochleoplasty.
  • The medial patellotibial and medial patellomeniscal ligaments provide secondary support and are especially important for patellar rotation and tilt when the knee is flexed.
  • There is ongoing debate over the necessity and effectiveness of reconstructing the medial patellotibial ligament alongside the medial patellofemoral ligament, leading to a lack of comprehensive clinical outcomes to guide practice.
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Phototoxic Effects on Skin Biomolecules Induced by a Domestic Nail Polish Dryer Device.

Chem Res Toxicol

January 2025

Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CCT La Plata-CONICET. B1904DPI, 1900 La Plata, Buenos Aires, Argentina.

UVA radiation and visible light can lead to indirect damage to DNA, proteins, and lipids through photosensitized reactions, where a molecule undergoes a photochemical alteration by the initial absorption of radiation by another molecular entity called photosensitizer (Sens). The chemical changes undergone by biomolecules in photosensitized reactions can trigger important adverse processes such as photoallergy, phototoxicity, and skin cancer, among others. Despite the knowledge about photosensitized reactions and the fact that many endogenous compounds present in the skin can act as Sens, UVA, and visible light are widely used in several devices for domestic and general use without a thorough evaluation of their possible harmful effects; one prominent example is UV-nail polish dryers.

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Impact of SGLT2 Inhibitors on Lipoproteins in Type 2 Diabetes.

Curr Diab Rep

January 2025

Facultad de Farmacia y Bioquímica, Laboratorio de Lípidos y Aterosclerosis, Universidad de Buenos Aires, Instituto de Fisiopatología y Bioquímica Clínica (INFIBIOC-UBA), Buenos Aires, Argentina.

Purpose Of Review: This article explores the cardiovascular effects of sodium-glucose cotransporter 2 inhibitors (SGLT2i) in patients with type 2 diabetes mellitus (T2DM), with a particular focus on their impact on lipid profiles. As evidence grows of the cardiovascular benefits of SGLT2i beyond glucose control, it is essential to better understand their effects on lipoproteins and their impact on cardiovascular disease.

Recent Findings: SGLT2i have shown significant cardiovascular benefits in patients with type 2 diabetes mellitus, beyond their role in lowering blood glucose.

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Background And Aims: Endoscopic mucosal resection (EMR) of large colorectal lesions can be challenging, and residual lesions after EMR can progress to colorectal cancer. We aimed to assess the efficacy and safety of adding thermal ablation of margins [using argon plasma coagulation (APC) or snare tip soft coagulation (STSC)] in reducing recurrence rates after EMR.

Methods: We performed a systematic review and meta-analysis of randomized controlled trials (RCTs) identified from PubMed, Cochrane Library, and Embase.

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Neurodegenerative pathologies such as age-related macular degeneration currently have no cure or effective treatment. In this type of disease, the presence of amyloid-β peptides, oxidative stress, and inflammation trigger dysregulation of retinal pigment epithelial cells and progression toward the death of these cells, resulting in a loss of vision. The production of amyloid-β peptides, oxidative stress, and inflammation can be triggered in response to viral infections.

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Analysis of printing temperature effect on texture modification: Potential of soy protein isolate-based bigel for swallowing-friendly food.

Int J Biol Macromol

January 2025

Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China; Institute of Western Agriculture, Chinese Academy of Agricultural Sciences, Changji 831100, China. Electronic address:

This work prepared the soy protein isolate (SPI)-beeswax-based bigel loaded with β-carotene, and the effect of printing temperature (PT) on texture regulation was investigated. During printing, increasing PT weakened the rheological properties and printability of ink. However, the mechanical strength and deformation resistance at non-linear regions of products were strengthened after printing.

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A dissociated glucocorticoid receptor modulator mitigates glucolipotoxicity in the endocrine pancreas and peripheral tissues: Preclinical data from a mouse model of diet-induced type 2 diabetes.

Life Sci

February 2025

Immuno-Endocrinology, Diabetes & Metabolism Laboratory, Instituto de Investigaciones en Medicina Traslacional (IIMT), CONICET - Universidad Austral, Pilar, Argentina; Facultad de Ciencias Biomédicas, , Universidad Austral, Pilar, Argentina. Electronic address:

Aims: Type 2 diabetes (T2D) is a prevalent metabolic disease linked to obesity and metabolic syndrome (MS). The glucolipotoxic environment (GLT) impacts tissues causing low-grade inflammation, insulin resistance and the gradual loss of pancreatic β-cell function, leading to hyperglycemia. We have previously shown that Compound A (CpdA), a plant-derived dissociative glucocorticoid receptor-modulator with inflammation-suppressive activity, displays protective effects on β-cells in type 1 diabetes murine models.

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A templex-based study of the Atlantic Meridional Overturning Circulation dynamics in idealized chaotic models.

Chaos

January 2025

CNRS-IRD-CONICET-UBA, Institut Franco-Argentin d'Études sur le Climat et ses Impacts (IRL 3351 IFAECI), C1428EGA CABA, Argentina.

Significant changes in a system's dynamics can be understood through modifications in the topological structure of its flow in phase space. In the Earth's climate system, such changes are often referred to as tipping points. One of the large-scale components that may pass a tipping point is the Atlantic Meridional Overturning Circulation.

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Several challenges to validity have been identified with standard approaches used to measure "demand satisfied for modern methods of family planning." This study explored construct validity of the widely used indicator for "demand satisfied" by comparing the standard definition to alternative definitions of the indicator highlighting dimensions of women's own perceived demand, choice, and satisfaction. This cross-sectional study of women aged 15-49 years was conducted in Argentina (n = 1492), Ghana (n = 1600), and India (n = 1702) using a two-staged random sampling design.

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Background: Irritable bowel syndrome (IBS) is influenced by various factors, including socioemotional stressors. The COVID-19 lockdown created a unique environment characterized by reduced social interactions, potentially impacting IBS symptoms.

Aim: To assess how lockdown measures affected symptoms related to the gut-brain axis in IBS patients in Buenos Aires, Argentina.

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Article Synopsis
  • Treatment Planning Systems (TPS) are evaluated for their effectiveness in correcting distortions in Magnetic Resonance (MR) images using a virtual phantom and Control Points (CPs).
  • The study involved creating distorted MR images and applying TPS, with findings showing that distortion caused median deviations of 1.8 mm, which were reduced to 0.6 mm after correction.
  • Structural Similarity Metric (SSIM) tests indicated significant improvements in image quality, with the TPS successfully reducing distortions to levels acceptable for radiosurgery.
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[Positional plagiocephaly and neurodevelopment: a narrative review].

Andes Pediatr

October 2024

Clínica Plagiocefalia Argentina, Buenos Aires, Argentina.

Unlabelled: Positional plagiocephaly is a common pediatric pathology that has been considered as a cosmetic condition, but recently its association with neurodevelopmental delay has been explored.

Objective: To perform a narrative review updating the findings of a 2017 systematic review on plagiocephaly and neurodevelopment.

Methodology: Articles in the MEDLINE, PubMed, Google Scholar, and DeepDyve databases were reviewed, data were extracted from the most relevant studies evaluating their methodological quality.

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Article Synopsis
  • Urinary tract infections (UTIs) in children are primarily caused by enterobacteria, but Streptococcus pneumoniae is a rare cause that can indicate underlying issues.
  • A case study focused on a 2-year-old girl with recurrent UTIs, renal malformations, and a detected UTI caused by Streptococcus pneumoniae demonstrated the importance of thorough imaging studies for such cases.
  • The findings highlight that UTIs from this atypical bacterium often correlate with serious renal-urological conditions, emphasizing the necessity for additional urinary tract evaluations in affected patients.
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[Consensus Recommendations for Lung Cancer Screening in Chile].

Rev Med Chil

May 2024

Instituto de Efectividad Clínica y Sanitaria, Buenos Aires, Argentina.

Unlabelled: Lung cancer is the leading cause of cancer death worldwide, also in Chile, where the main risk factor is smoking. Early detection using low-dose computed tomography has been shown to reduce mortality from this cause, but there are still no formal screening recommendations in Chile.

Aim: This initiative aimed to develop recommendations for lung cancer screening in Chile through an expert consensus process.

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[Exploring Turning Points in the Academic Lives of Health Sciences Students].

Rev Med Chil

May 2024

Departamento Educación Biomédica, Facultad de Ciencias Biomédicas, Universidad Austral, Argentina.

Unlabelled: This research set out to identify and describe turning points in the lives of medical, nursing, and psychology students in a school of health sciences at a private university in Argentina. Turning points refer to unexpected events and situations in people's lives where it is possible to determine a change or transformation.

Aim: to explore turning points originating in the health sciences school.

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Quantum chemical and kinetic study of the reaction between CCl and NO radicals.

Phys Chem Chem Phys

January 2025

Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CCT La Plata-CONICET, Casilla de Correo 16, Sucursal 4, (1900) La Plata, Argentina.

The dependence of the rate constant of the recombination reaction of CCl and NO radicals on temperature and pressure was studied. Quantum-chemical calculations were employed to characterize relevant aspects of the potential energy surface for this process. The limiting rate constants between 300 and 2000 K were analyzed using the unimolecular reactions theory.

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Introduction: Anandamide (AEA) is an endocannabinoid that has recently been recognized as a regulator of various inflammatory diseases as well as cancer. While AEA was thought to predominantly engage cannabinoid (CB) receptors, recent findings suggest that, given its protective anti-inflammatory role in pathological conditions, anandamide may engage not only CB receptors.

Methods: In this study, we studied the role of exogenous AEA in a mouse AirPouch model of acute inflammation by examining immune cell infiltrates by flow cytometry.

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Aim: To describe the features of cortical oscillatory activity and neuronal synchronization by monitoring responses evoked by chirp-modulated tone (CMT) and look for relationships with cognition in healthy children.

Methods: We recruited 23 healthy children, 1-18 years old, assessed their cognitive abilities and recorded the cortical oscillatory activity evoked by CMTs. We obtained descriptive statistics and looked for correlations with cognitive abilities.

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Distortions in the porphyrin core from planarity can trigger a unique structure-property relationship, imparting its basicity, chemical stability, redox potential, and excited-state energetics, among other properties. The colour change promoted by such distortion is signed by red shifts in its electronic absorption spectra. The adsorption of guest -substituted free-base porphyrin species onto inorganic hosts, such as clay minerals (layered aluminium or magnesium silicates), is known to further promote colour changes.

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A new species of Travassos 1917 (Nematoda: Heligmonellidae) in small rodents (Cricetidae and Heteromyidae) from Mexico.

J Helminthol

January 2025

Consejo Nacional de Investigaciones Científicas y Técnicas - CONICET. Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Paseo del Bosque s/n (1900), La Plata, Argentina.

Article Synopsis
  • A new nematode species from small rodents in the Yucatan Peninsula, Mexico, was identified using microscopy and genetic sequencing.
  • The species exhibits unique physical traits such as interrupted ridges and distinct characteristics in males and females.
  • Genetic analysis indicates low variability among specimens from different rodent hosts, suggesting this nematode can expand its host range effectively.
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Whey-Derived Antimicrobial Anionic Peptide Interaction with Model Membranes and Cells.

Langmuir

January 2025

Departamento de Química, Catedra de Química Biológica, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba 5000, Argentina.

The present work focuses on one of the possible target mechanisms of action of the anionic antimicrobial peptide β-lg derived from trypsin hydrolysis of β-lactoglobulin. After confirmation of bactericidal activity against a pathogenic Gram(+) strain and demonstration of the innocuousness on a eukaryotic cell line, we investigated the interaction of β-lg with monolayers and bilayers of dpPC and dpPC:dpPG as model membranes of eukaryotic and bacterial membranes, respectively. In monolayers, compared to zwitterionic dpPC, in the negatively charged dpPC-dpPG, β-lg injected into the subphase penetrated up to higher surface pressures and showed greater extents of penetration with increasing concentration in the subphase.

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