221 results match your criteria: "University of Mar del Plata[Affiliation]"

Exploring coach and parent transformational leadership and their associations with social identity in adolescents.

Psychol Sport Exerc

December 2024

Department of Social Psychology, Faculty of Psychology and Speech Therapy, University of Valencia, Avd. Blasco Ibañez 21, 46010, Valencia, Spain. Electronic address:

The main objective of this study was to explore the associations between the transformational leadership of coaches and parents and adolescent athletes' social identity and examine the roles of gender and the stage of adolescence in these relationships. Furthermore, this study aimed to provide empirical evidence on measurement invariance across gender and the adolescent stage in the adapted Spanish version of the Social Identity Questionnaire for Sport (SIQS). The sample consisted of 656 athletes (299 males and 357 females) from 12 to 18 years old (M = 15.

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Does cognitive inhibition contribute to working memory and reasoning during childhood?

Psychol Res

December 2024

Institute of Basic and Applied Psychology, and Technology (IPSIBAT), National Scientific and Technical Research Council (CONICET), National University of Mar del Plata (UNMdP), Mar del Plata, Argentina.

Theoretical frameworks suggest that cognitive inhibition suppresses irrelevant information in working memory, preventing overload and promoting the processing of task-relevant information. Consequently, it may also contribute to more complex skills, such as abstract reasoning, by facilitating the retention and processing of patterns and relationships. However, empirical evidence does not consistently show these relationships in early elementary school years.

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Article Synopsis
  • - The study investigates proteolytic enzymes extracted from brewer's spent grain (BSG) sourced from various artisanal beers, assessing their ability to serve as eco-friendly coagulants in cheese-making.
  • - Through optimization experiments, the researchers identified that caseinolytic activity peaked at pH 8.0, with significant variations in enzyme efficacy across different BSG samples.
  • - Results suggest that certain BSG extracts possess milk-clotting activity comparable to traditional plant-based coagulants, indicating a promising sustainable connection between the brewing and dairy sectors.
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Socio-cognitive research on bilinguals points to a moral foreign-language effect (MFLE), with more utilitarian choices (e.g., sacrificing someone to save more people) for moral dilemmas presented in the second language (L2) relative to the first language.

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Weaving the next generation of (bio)materials: Semi-interpenetrated and interpenetrated polymeric networks for biomedical applications.

Adv Colloid Interface Sci

October 2023

POLYMAT, Applied Chemistry Department, Faculty of Chemistry, University of the Basque Country, UPV/EHU, Paseo Manuel de Lardizabal 3, 20018 Donostia-San Sebastián, Spain; IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Spain. Electronic address:

Advances in polymer science have led to the development of semi-interpenetrated and interpenetrated networks (SIPN/IPN). The interpenetration procedure allows enhancing several important properties of a polymeric material, including mechanical properties, swelling capability, stimulus-sensitive response, and biological performance, among others. More interestingly, the interpenetration (or semi-interpenetration) can be achieved independent of the material size, that is at the macroscopic, microscopic, or nanometric scale.

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Article Synopsis
  • CeO samples were made using the polymeric precursor method with varying calcination temperatures, leading to changes in particle size and shape.
  • Advanced techniques like positron annihilation lifetime spectroscopy (PALS) and electron paramagnetic resonance (EPR) revealed the presence of different types of oxygen vacancies associated with various cerium ions.
  • Impedance spectroscopy showed that as the calcination temperature increased, there was a reduction in electrical conductance and the formation of polarons in the material.
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This cross-sectional study used secondary data from the USA 2020 National Health Interview Survey database. The goal of this study is to outline the impact physical activity has on cognition and mental ability. The reason we chose to pursue this research was a result of the exponentially growing weight of economic and emotional burden caused by cognitive impairments and diseases.

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Non-Propagating Cracks at the Fatigue Limit of Notches: An Analysis of Notch Sensitivity and Size Effect.

Materials (Basel)

September 2024

Laboratory of Experimental Mechanics, INTEMA, National University of Mar del Plata-CONICET, Av. Colón 10.850, Mar del Plata B7600, Argentina.

The issues of the high-cycle fatigue resistance of notches and the role of non-propagating short cracks in defining the fatigue notch sensitivity and fatigue limit of the configuration are addressed. A fracture mechanics approach is employed to determine the threshold configuration that defines the associated fatigue limit. The influence of notch sharpness, notch size, intrinsic fatigue limit, microstructural dimensions, and the threshold for crack propagation is examined.

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Protozoan parasite Neospora caninum causes abortion in infected cattle while others remain asymptomatic. Host immunity plays a critical role in the outcome of bovine neosporosis. Despite extensive research, there is a critical gap in therapeutic and preventive measures, and no effective vaccines are available.

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This study explores the dynamics of self-assembly and mesophase formation through molecular dynamics simulations of hexagonal and lamellar systems using a simplified coarse-grained model. We focus on characterizing the order-disorder transitions driven by temperature variations and emphasize the often overlooked disordered regime, which serves as a precursor to periodic mesoscale ordering. Our findings not only underscore the morphological richness of the disordered regime, comparable to that of its periodic counterparts, but also reveal the presence of clustering regimes within isotropic phases, thus corroborating prior experimental and theoretical observations.

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Polymer chain transport investigated using surface enhanced Raman spectroscopy: monitoring of diffusion kinetics on meso-structured plasmonic substrates.

Soft Matter

September 2024

Institute of Materials Science and Technology (INTEMA), National Research Council (CONICET), University of Mar del Plata, Mar del Plata, Argentina.

We utilize the results of surface-enhanced Raman spectroscopy (SERS)-based interdiffusion experiments on meso-structured substrates to independently validate direct observations of plasmonic enhancements on these elements. The plasmonic enhancement function (PEF) is crucial for accurately determining interdiffusion coefficients using this newly proposed SERS-based methodology. The substrates feature a microscale inverted pyramid geometry, coated with nanoscale sputtered gold.

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Background: Alcohol consumption among young people is a significant public health concern. Previous studies have indicated that participation in sports, through the positive experiences it offers, may function as a protective factor against alcohol intake. This study aimed to examine the influence of enjoyment and personal fulfillment on adolescent alcohol use, exploring the role of engagement with sports as a mediating variable.

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Use of Wing Geometric Morphometric Analysis and mtDNA to Identify Africanization of in the Central Highlands of Ecuador.

Insects

August 2024

Department of Infectious Diseases and Pathology, School of Veterinary Medicine, St. Nicholas University, Morne Daniel, Roseau 00109-8000, Dominica.

Seventy-five samples were collected from 15 beehives in the central highlands of Ecuador (Tungurahua-Chimborazo) to assess Africanization in managed bee populations using wing geometric morphometric and mitochondrial DNA analyses. The results indicated that when grouping the apiaries based on altitudinal floors into 2600-2800, 2801-3000, and 3001-3274 m above sea level, differences ( < 0.001) were observed.

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Multiresponsive Nanogels for the Selective Delivery of Antimicrobial Drugs to Mucosal Tissues.

Biomacromolecules

September 2024

POLYMAT, Applied Chemistry Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia-San Sebastián 20018, Spain.

Effective drug delivery to bacterially infected mucosa remains a challenge due to the combined obstacles of the mucosal barrier, pH variations, and high concentrations of glutathione. However, polysaccharide-based responsive nanogels (NGs) can take advantage of these conditions to deliver specific antimicrobials. We explored the critical features of pH- and redox-responsive NGs to increase drug penetration, residence time, and efficacy in the infected mucosa.

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Cotton wool-like ion-doped bioactive glass nanofibers: investigation of Zn and Cu combined effect.

Biomed Mater

September 2024

Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany.

Electrospinning is a versatile and straightforward technique to produce nanofibrous mats with different morphologies. In addition, by optimizing the solution, processing, and environmental parameters, three-dimensional (3D) nanofibrous scaffolds can also be created using this method. In this work, the preparation and characterization of bioactive glass (BG) scaffolds based on the SiO-CaO sol-gel system, a biomaterial with a highly reactive surface, is reported.

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Background: The incidence of anesthesia-induced atelectasis in children is high and closely related to episodes of hypoxemia. The Air-Test is a simple maneuver to detect lung collapse. By a step-reduction in FiO2 to 0.

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Engagement in Youth Athletes as a Positive Experience in Sport: Implications of Gender, Age, and Competitive Level.

Eur J Investig Health Psychol Educ

June 2024

Department of Social Psychology, Faculty of Psychology and Speech Therapy, University of Valencia, 46010 Valencia, Spain.

The aim of this study was to examine athlete engagement and its relationships with indicators of the quality of the athlete's sport experience, exploring potential differences according to gender, age, and competitive level. Furthermore, this study validated the Athlete Engagement Questionnaire (AEQ) in young athletes and confirmed its factor structure. A total of 1188 athletes (43.

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The Role of Personalized Normative Feedback in the Efficacy of Brief Intervention Among Argentinian University Students: A Randomized Controlled Trial.

Subst Use Misuse

September 2024

Institute of Basic, Applied Psychology and Technology (IPSIBAT), National Scientific and Technical Research Council (CONICET), National University of Mar del Plata (UNMdP), Mar del Plata, Argentina.

: Personalized Normative Feedback (PNF) aims to modify misperceptions about peer consumption that influence one's drinking. PNF is usually a component in Brief Interventions delivered to university students. Despite this, whether PNF contributes to improving the effect of brief interventions is unclear.

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Ferroptosis in health and disease.

Redox Biol

September 2024

Institute of Metabolism and Cell Death, Helmholtz Center Munich, Germany. Electronic address:

Article Synopsis
  • Ferroptosis is a key form of cell death linked to various diseases, characterized by excessive peroxidation of fatty acids in cell membranes, which causes the cell to rupture.
  • This process is influenced by iron and redox balance within cells but can also be targeted for pharmacological treatments, making ferroptosis-related proteins potential candidates for new therapies.
  • A research consortium in Germany, along with leading experts, aims to review the mechanisms, significance, and methodologies related to ferroptosis to promote further research and potential new treatments for diseases affected by this process.
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The genus harbors opportunistic pathogenic species, among which is pathogenic for honeybees although little studied. Recently, virulent strains of colonizing the mite's mouth were found vectored into the honeybee body, leading to septicemia and death. also occurs as an opportunistic pathogen in the honeybee's gut with a low absolute abundance.

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Background: The psychopathology of personality is currently undergoing a paradigm shift from a categorical to a dimensional approach. This work aimed to study the underlying structure of pathological personality traits of the DSM-5 Alternative Model for Personality Disorders (AMPD). For this purpose, the internal structure of a version of the Personality Inventory for the DSM-5 (PID-5) was examined by a confirmatory factor analysis.

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Dependence of n-Type Metal-Oxide Gas Sensor Response on the Pressure of Oxygen and Reducing Gases.

ACS Sens

April 2024

Institute of Scientific and Technological Research in Electronics (ICYTE), University of Mar del Plata and National Research Council (CONICET), Juan B. Justo 4302, Mar del Plata B7608FDQ, Argentina.

The adsorption of oxygen and its reaction with target gases are the basis of the gas detection mechanism by using metal oxides. Here, we present a theoretical analysis of the sensor response, within the ionosorption model, for an n-type polycrystalline semiconductor. Our goal of our work is to reveal the mechanisms of gas sensing from a fundamental point of view.

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Bunodosoma zamponii is the most abundant anemone in Mar del Plata (Buenos Aires, Argentina). Given that the presence of persistent organic pollutants (organochlorine pesticides and PCBs) and the organophosphate pesticide chlorpyrifos has recently been reported in this species, two wild populations living under different anthropogenic pressures were studied and compared regarding basic aspects of their ecology and physiological response to oxidative stress. A population from an impacted site (Las Delicias, LD) and another from a reference site (Punta Cantera, PC) were monitored seasonally (spring, summer, autumn, and winter), for one year.

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