Browsing Artículos Científicos by Title
Now showing items 3626-3645 of 3827
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Ugi efficient synthesis of novel N–alkylated lipopeptides, antimicrobial properties and computational studies in Staphylococcus aureus via MurD antibacterial target
; ; ; ; ; ; ; ; ; ; ; ; abril, diana
(2023)
Lipopeptides are medicinally essential building blocks with strong hemolytic, antifungal and antibiotic potential. In the present research article, we are presenting our findings regarding the synthesis of N–alkylated ...
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Ugi reaction-derived prolyl peptide catalysts grafted on the renewable polymer polyfurfuryl alcohol for applications in heterogeneous enamine catalysis
(2019)The multicomponent synthesis of prolyl pseudo-peptide catalysts using the Ugi reaction with furfurylamines or isocyanides is described. The incorporation of such a polymerizable furan handle enabled the subsequent ...
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Ultra-processed food consumption and the incidence of obesity in two cohorts of latin-american young children: a longitudinal study
(2023)Purpose We evaluated the potential associations between the consumption of ultra-processed food (UPF) and the incidence of obesity among Uruguayan and Brazilian preschoolers. Design and methods We conducted a longitudinal ...
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Ultrasound reference values for the calcaneus of children and adolescents at moderate altitudes in Peru
(2021)Objective: a) Establish reference values for bone parameters by using the speed of sound (SOS, m/s) of broadband ultrasound attenuation (BUA, dB/MHz) and establish a bone quality index (BQI=αSOS+βBUA) for children and ...
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Um estudo comparativo com gráficos estatísticos a partir de atividades de livros didáticos do 2º ano do ensino fundamental no Brasil e no Chile
(2020)En este artículo describimos los resultados de un estudio comparativo sobre gráficos estadísticos en las actividades propuestas en los libros de texto de 2° año de Educación Primaria en Brasil y Chile, dirigidos a niños ...
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Uncertainty quantification for plant disease detection using Bayesian deep learning
(2020)Climate change is having an enormous impact on crop production in Latin America and the Caribbean. This problem not only concerns the volume of crop production but also the quality and safety of the food industry. Several ...
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Undergraduate occupational health nursing education in Chile, Colombia, Brazil, and Mexico
(2024)Background: Occupational health nursing plays a fundamental role in addressing the health of the working population; however, training in this area differs around the world in terms of levels, duration, content, and ...
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Understanding brewing trait inheritance in de novo Lager yeast hybrids
(2024)Hybridization between Saccharomyces cerevisiae and Saccharomyces eubayanus resulted in the emergence of S. pastorianus, a crucial yeast for lager fermentation. However, our understanding of hybridization success and hybrid ...
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Understanding elementary and secondary students' representation of cultural differences as reflected in the process of intercultural communication in school contexts
Sanhueza, Susan; ; (2015)
The purpose of this study was to describe and discuss students' perceptions and attitudes toward cultural differences as reflected in the processes of intercultural communication in culturally diverse classrooms. We chose ...
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Understanding how much TV is too much: a nonlinear analysis of the association between television viewing time and adverse health outcomes
(2020)Objective: To inform potential guideline development, we investigated nonlinear associations between television viewing time (TV time) and adverse health outcomes. Methods: From 2006 to 2010, 490,966 UK Biobank participants, ...
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Understanding statistical graphs of students attending multigrade rural schools in Chile
(2024)This study aims to analyze the graphical comprehension of 5th and 6th grade students in multigrade rural primary education in Chile. The theoretical framework considers levels of reading and semiotic levels in statistical ...
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Understanding teachers' responses to anxiety in children with autism at elementary schools and preschools
(2024)A total of 40% of children with ASD have clinical symptoms of anxiety. However, there is little research on how teachers respond to this type of behaviour in the classroom. This study aimed to compare teachers' responses ...
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Understanding the life experience of people on hemodialysis: Adherence to treatment and quality of life.
(2014)This hermeneutic-phenomenological study explores the lived experiences of patients on hemodialysis in regard to the adherence to treatment and quality of life. Fifteen patients were interviewed, including six women and ...
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Unfolding political attitudes through the face: facial expressions when reading emotion language of left- and right-wing political leaders
(2019)Spontaneous emotionally congruent facial responses (ECFR) to others’ emotional expressions can occur by simply observing others’ faces (i.e., smiling) or by reading emotion related words (i.e., to smile). The goal of the ...
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Unidad Popular durante la Guerra Fría: una aproximación desde la experiencia de la Nueva Canción Chilena
(2022)El presente ensayo aborda el proyecto de la Unidad Popular en Chile desde el contexto de la Guerra Fría. A través de un enfoque cultural y político, permite entender la experiencia de la Nueva Canción Chilena dentro de la ...
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Universal mental health screening with a focus on suicidal behaviour using smartphones in a mexican rural community: protocol for the smartscreen population-based survey
(2020)Introduction: Mental disorders represent the second cause of years lived with disability worldwide. Suicide mortality has been targeted as a key public health concern by the WHO. Smartphone technology provides a huge ...
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University social responsibility and environmental education: Challenges that contribute to the development of educational policies in Chile
(2024)University social responsibility (USR), environmental education, and sustainability are linked and, at the same time, evidently promoted through policies that consider the goals of the Sustainable Development Goals (SDGs). ...
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University social responsibility and sustainable development goals: challenges and opportunities from the perspective of students from a catholic university
(2025)The objective of this research is to describe university students' perceptions on university social responsibility (USR) strategies with a focus on the Sustainable Development Goals (SDGs) enrolled in a religious university ...
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Unraveling biotypes of the northern house mosquito, Culex pipiens s.l. (Diptera: Culicidae): molecular differentiation and morphometric analysis
(2024)Geometric morphometrics was used to determine whether geographic isolation could explain differences in wing size and shape between and within continental (27°S to 41°S) and insular (Rapa Nui) populations of Culex pipiens ...