Results 31 to 40 of about 63,042 (166)

Tracer Hydrology Practices, Challenges, and Opportunities Across Latin America and the Caribbean

open access: yesHydrological Processes, Volume 40, Issue 1, January 2026.
Tracer monitoring characteristics across the LAC region: overview of sampled hydrologic systems, commonly used tracers, routine and event‐based sampling strategies, integration with hydrometric measurements, and monitoring durations. ABSTRACT Tracer hydrology in Latin America and the Caribbean has made significant progress in recent decades, largely ...
Ricardo Sánchez‐Murillo   +47 more
wiley   +1 more source

Photocatalytic Reduction of Nitroaromatic Compounds Using NiO‐Modified MgAl Hydrotalcite: A Sustainable Approach for Wastewater Treatment

open access: yesJournal of Chemistry, Volume 2026, Issue 1, 2026.
The growing industrialization has caused the generation of highly toxic compounds such as nitroaromatic compounds. An adequate treatment to reduce the contamination of these organic compounds is necessary. The photocatalytic reduction of aromatic compounds using semiconductor materials favors the production of nitroaromatics.
Leimmy Calderon   +8 more
wiley   +1 more source

The Diamesinae (Diptera: Chironomidae) in High‐Altitude Andean Streams Using Morphological and Molecular Approaches

open access: yesEcology and Evolution, Volume 15, Issue 12, December 2025.
Diamesinae is one of the 11 subfamilies of Chironomidae, characterized by its preference for cold waters, typically found in mountainous regions. For the genus Limaya, two OTUs were identified using all methods, one for Ecuador and one for Peru. Seven OTUs were identified for the genus Paraheptagyia.
Diana C. Hoyos Jaramillo   +4 more
wiley   +1 more source

Prevalencia del consumo de bebidas energizantes y efectos adversos en estudiantes de medicina

open access: yesRepertorio de Medicina y Cirugía, 2023
Introducción: las bebidas energizantes son preparados estimulantes e hidratos de carbono. Objetivo: determinar la prevalencia, características del consumo y los efectos adversos en estudiantes de un programa de medicina Metodología: estudio ...
Marina del Valle Gonzalez Rausseo   +5 more
doaj  

Marcadores de severidad de la apendicitis aguda: estudio de prueba diagnóstica

open access: yesRevista Colombiana de Gastroenterología, 2022
Introducción: la apendicitis aguda (AA) es una de las patologías quirúrgicas abdominales más frecuentes en el mundo, siendo la apendicectomía, la cirugía de emergencia más realizada a nivel mundial.
Ledmar Jovanny Vargas Rodríguez   +4 more
doaj   +1 more source

Global variation in honey bee (Apis mellifera) mating flight times

open access: yesNew Zealand Journal of Zoology, Volume 52, Issue 5, Page 830-843, December 2025.
ABSTRACT During the mating season, male (drone) honey bees (Apis mellifera L.) make daily flights to drone congregation areas (DCAs) for the purpose of mating with a virgin queen. The timing of these flights (drone flight period) varies between geographic regions. However, the spatial scale over which variation occurs and the mechanisms contributing to
Erin J. Steed   +2 more
wiley   +1 more source

Microwave‐Assisted One‐Pot Synthesis of Alkyl Levulinates From Post‐Harvest Vegetable Waste

open access: yesAdvanced Sustainable Systems, Volume 9, Issue 9, September 2025.
Vegetable waste is valorized through Soxhlet extraction using H₂O₂ and heteropolyacid (HPA), followed by material characterization (XRD, FTIR, TGA, DSC). A microwave‐assisted reaction at 170 °C for 30 min with HPA and alcohol yields bio‐based esters.
Ángel G. Sathicq   +5 more
wiley   +1 more source

Estigmatización social y territorial: efectos de la toma guerrillera de septiembre de 1997 en Pajarito, Boyacá

open access: yesCambios y Permanencias, 2019
La toma guerrillera ocurrida el 10 de septiembre de 1997 en Pajarito, Boyacá, por parte de los frentes 38 y 56 de la guerrilla de las Fuerzas Armadas Revolucionaras de Colombia-Ejército del Pueblo, FARC-EP, se configuró en un caso emblemático de la ...
Paola Andrea Díaz Bonilla
doaj  

Origins and Diversification of the Caatinga Dry Forest Endemic Avifauna

open access: yesJournal of Biogeography, Volume 52, Issue 9, September 2025.
ABSTRACT Aim Understanding the geographic origin of lineages is critical to comprehending their biogeographical and evolutionary histories and the historical connections among biomes. In northeastern Brazil, the Caatinga dry forest represents the largest and most biologically diverse patch of Seasonally Dry Tropical Forest in the Neotropics.
Hevana S. Lima   +5 more
wiley   +1 more source

FAMILIA, PODER Y ESMERALDAS. Relaciones de género y estructura económica minera en el occidente de Boyacá, Colombia

open access: yesRevista Colombiana de Antropología, 2006
LA ORGANIZACIÓN SOCIAL Y CULTURAL DE LA ZONA ESMERALDÍFERA DEL OCCIDENTE DEL departamento de Boyacá (Colombia) está relacionada con los insumos de la producción minera, que se reflejan en las transformaciones de las estructuras de parentesco y las ...
JOHANNA A. PARRA BAUTISTA
doaj  

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