Results 31 to 40 of about 539 (126)

Multimetal removal in aqueous medium using a potato starch/nopal mucilage copolymer: A study of adsorption kinetics and isotherms

open access: yesResults in Engineering, 2023
In reducing heavy metals from water for direct or indirect consumption, various synthetic materials have been used; there is a tendency to use natural, biodegradable, and environmentally friendly materials. The aim was to elaborate copolymers with native
David Choque-Quispe   +9 more
doaj   +1 more source

Study of the pollution by surfactants in a river of a high Andean micro basin

open access: yesDyna, 2021
The surfactants linear alkylbenzene sulfonate (LAS), is used in large quantities in modern society, and wastewater containing it can contaminate groundwaters through runoff and sewers.
David Choque-Quispe   +6 more
doaj   +1 more source

Quena amazónica: expresión artística y cultural en la música peruana

open access: yesRevista Electrónica Complutense de Investigación en Educación Musical, 2022
La quena (también conocida por qqena, kena, kkena o kkhena) es un aerófono perteneciente a la familia de flautas o instrumentos de viento. Debido a su antigüedad, riqueza de variantes y sonido particular, el Instituto Nacional de Cultura del Perú (INC ...
Yon Govy Ramírez-Rodríguez   +2 more
doaj   +1 more source

Quantitative and qualitative shifts in defensive metabolites define chemical defense investment during leaf development in Inga, a genus of tropical trees

open access: yesEcology and Evolution, Volume 6, Issue 2, Page 478-492, January 2016., 2016
This study provides a detailed assessment of chemical defense investment in a speciose Neotropical tree genus during leaf development. Exploring the leaf metabolome through quantitative and qualitative profiling enables a more comprehensive examination of chemical defense investment at a timescale relevant to leaf development and immediate stressors ...
Natasha L. Wiggins   +4 more
wiley   +1 more source

Percepción del docente sobre su desempeño ante los cambios curriculares.

open access: yesEncuentros
El presente estudio se desarrolló con el objetivo de analizar la percepción que los docentes tienen de su desempeño, en relación con los cambios curriculares.
Adonías Julia Villa Calderón   +3 more
doaj   +1 more source

Analysis and estimation of the forest cover of an urban area using the NDVI index of the Sentinelhub portal

open access: yesFIGEMPA
This study focuses on the forest cover of three districts in the urban area of the province of Andahuaylas, Apurímac region, Peru, which is facing deforestation problems.
Carlos Dueñas-Valcarcel   +3 more
doaj   +1 more source

De/Sedimentation: The Geopoetics of José Watanabe and Soledad Fariña

open access: yesBulletin of Latin American Research, Volume 44, Issue 3, Page 147-160, July 2025.
This paper explores de/sedimentation as both a textual and geological concept through the works of José Watanabe (La piedra alada) and Soledad Fariña (PAC PAC PEC PEC) to examine how literary and material traces accumulate, erode and reemerge within the colonial Anthropocene.
Rosa Berbel
wiley   +1 more source

Artículos Intervención en docentes para el desarrollo de competencias psicomotoras en niños a nivel preescolar

open access: yesTelos: Revista de Estudios Interdisciplinarios en Ciencias Sociales, 2022
El estudio tuvo el objetivo de comprender las percepciones de los docentes acerca de la innovación y la práctica pedagógica en instituciones educativas rurales en el Perú en tiempos de pandemia.
Edgar L. Martínez-Huamán   +2 more
doaj   +1 more source

Beyond gatekeeping: Philosophical sources, Indigenous philosophy, and the Huarochirí Manuscript

open access: yesMetaphilosophy, Volume 55, Issue 3, Page 365-380, July 2024.
Abstract This paper argues for a broad definition of philosophical sources and how Indigenous traditional knowledge fits that definition. It concludes by showing how, following the previous two points, an Indigenous document such as the Huarochirí Manuscript can be considered a philosophical source by academic philosophers. The paper has three sections:
Jorge Sanchez‐Perez
wiley   +1 more source

Clima organizacional y desempeño laboral en una Caja Municipal

open access: yesInnova Research Journal, 2023
El presente estudio se realizó con el propósito de determinar el grado de relación entre el clima organizacional y el desempeño laboral en una Caja Municipal, bajo la siguiente consideración metodológica, enfoque cuantitativo, tipo básica, nivel ...
Alfredo Huamán-Cuya
doaj   +1 more source

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