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Mostrando publicaciones 4874-4893 de 5127
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Trimethylsilyl azide-promoted acid-amine coupling: a facile one-pot route to amides from carboxylic acids and amines
; ; ; abril, diana
; (2023)
A versatile and efficient one-pot protocol has been developed for the synthesis of amides from easily accessible carboxylic acids and amines by employing trimethylsilyl azide as a promoter at room temperature. This ...
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Trivialización, predicado y nominalización
Miranda-Rojas, Rafael (2019)
El presente escrito tiene por objetivo discutir los alcances de la denominada vía predicativa en el análisis de la rigidez de los términos generales. En particular, se analizará la interpretación que Zerbudis (2013) realiza ...
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TRPM7 and CaV3.2 channels mediate Ca2+ influx required for egg activation at fertilization
(2018)The success of mammalian development following fertilization depends on a series of transient increases in egg cytoplasmic Ca2+, referred to as Ca2+ oscillations. Maintenance of these oscillations requires Ca2+ influx ...
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TRPM7-like channels are functionally expressed in oocytes and modulate post-fertilization embryo development in mouse
(2016)The Transient Receptor Potential (TRP) channels are a family of cationic ion channels widely distributed in mammalian tissues. In general, the global genetic disruption of individual TRP channels result in phenotypes ...
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TRPM8 channel promotes the osteogenic differentiation in human bone marrow mesenchymal stem cells
(2021)Various families of ion channels have been characterized in mesenchymal stem cells (MSCs), including some members of transient receptor potential (TRP) channels family. TRP channels are involved in critical cellular processes ...
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Tsunami early warning system using offshore tsunameters in Peru
(2023)Earthquakes occurring in the Peru-Chile Trench can trigger tsunamis that damage the Peruvian coast. The Directorate of Hydrography and Navigation plans to install three offshore tsunameters in 2023. We propose a tsunami ...
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Tumor neuroendocrino Tipo 1: reporte de un caso y revisión de la literatura
(2020)Introducción: Los tumores neuroendocrinos (TNE), son tumores compuestos por células productoras de péptidos y aminas. Los TNE gástricos, representan el 1% de todas las neoplasias, sin embargo su incidencia ha ido en aumento. ...
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Tumor-associated macrophages in gastric cancer: More than bystanders in tumor microenvironment
; Rojas, Armando (2017)
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Two new Darwin wasp species of Eiphosoma Cresson, 1865 (Ichneumonidae: Cremastinae) from the northwestern Andes of Colombia
(2023)Two new Darwin wasp species of Eiphosoma Cresson, 1865 (E. nigroandinum Fernandes sp. nov. and E. merceae Fernandes sp. nov.) are described from the northwestern Andes of Colombia. Furthermore, we propose the establishment ...
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Two oscillatory correlates of attention control in the alpha-band with distinct consequences on perceptual gain and metacognition
(2023)Behavioral consequences and neural underpinnings of visuospatial attention have long been investigated. Classical studies using the Posner paradigm have found that visual perception systematically benefits from the use of ...
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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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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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UML y CATALYSIS, una comparativa
(Universidad Católica del Maule, Facultad de Ciencias de la Ingeniería, 2005)En este informe se presenta una comparativa entre un lenguaje y una metodología, ambas destinadas al modelado de datos; estas son UML y Catalysis. Es importante aclarar el uso del término metodología, para generalizar y ...
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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 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 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 ...