Results 11 to 20 of about 3,425 (137)

Crecimiento de estructuras de carbono mediante deposición química en fase de vapor a baja presión

Tecnología en Marcha, 2022
Los alótropos de carbono han ganado interés en las últimas décadas debido a sus propiedades y a la gran variedad de posibles aplicaciones tecnológicas que han demostrado.
Stephanie Mariela Varela-Fonseca, Camila Hernández-Murillo, Ernesto Montero-Zeledón, Dionisio Gutiérrez-Fallas, Roberto Urcuyo, Allen Puente-Urbina   +5 more
doaj   +3 more sources

Deposición convectiva rápida a escala nanométrica de materiales compuestos activos para la fabricación de transistores orgánicos de efecto de campo

Ingenius: Revista de Ciencia y Tecnología, 2021
Transistores orgánicos de efecto de campo basados en un material compuesto han sido fabricados por medio de la técnica de deposición convectiva rápida. La fabricación fue llevada a cabo bajo condiciones ambientales (aire, luz y humedad).
Freddy G. Del Pozo, Marta Mas-Torrent
doaj   +2 more sources

Ingreso de nitrógeno y fósforo al lago Atitlán (Guatemala) vía deposición atmosférica

Ciencia, Tecnología y Salud, 2022
La deposición de nutrientes por vía atmosférica tiene graves impactos sobre la ecología de bosques y cuerpos de agua templados. Sin embargo, su importancia en cuerpos de agua neotropicales casi no ha sido estudiada.
Margaret A. Dix, Sofia Gomez, Ovidio F. Garcia-Oliva, Michael W. Dix, Claudia S. Romero-Oliva, Jorge Garcia-Polo   +5 more
doaj   +2 more sources

Diseño de sistema para la deposición de una feromona ferromagnética desde un robot móvil para robótica de enjambres

Tecnología en Marcha
En este artículo se muestra el diseño, la implementación y validación de un sistema de deposición de una feromona ferromagnética. El trabajo surge de la necesidad de implementar un método de comunicación bio inspirado, como lo son las feromonas, en un ...
Daniel Monge-Chaves, Juan Carlos Brenes-Torres, Cindy Calderón-Arce   +2 more
doaj   +2 more sources

Effects of nitrogen deposition on territory numbers of breeding birds. [PDF]

Conserv Biol
Abstract Deposition of atmospheric N (nitrogen) is assumed to be a major cause of biodiversity decline in Europe. To date, few studies on the direct or indirect effects of N on bird species have been conducted. Using Swiss bird count data and habitat data, we analyzed the correlation of N deposition with numbers of territories of 112 breeding bird ...
Meichtry-Stier K, Korner P, Birrer S, Knaus P.   +3 more
europepmc   +2 more sources

Biocrusts increase the resistance to warming-induced increases in topsoil P pools. [PDF]

J Ecol, 2022
Our findings provide novel insights on the responses of soil P pools to warming and rainfall reduction, and highlight the importance of biocrusts as modulators of these responses in dryland ecosystems. Our results suggest that the observed negative impacts of warming on dryland biocrust communities will decrease their capacity to buffer changes in ...
García-Velázquez L, Gallardo A, Ochoa V, Gozalo B, Lázaro R, Maestre FT.   +5 more
europepmc   +2 more sources

Claw growth rates in a subset of adult, indoor, domestic cats (Felis catus). [PDF]

Vet Dermatol
Background – Keratinised tissues, such as nails and claws, accumulate hormones over time; the claws' hormone concentrations are being explored as potential biomarkers. Timelines for hormone deposition can be established if claw growth rates are known. Hormone concentration within cat claws has been recently evaluated, yet the growth rates of cat claws ...
Contreras ET, Bruner K, Hegwer C, Simpson A.   +3 more
europepmc   +2 more sources

Safety and efficacy of laxatives after major abdominal surgery: systematic review and meta-analysis. [PDF]

BJS Open, 2020
Routine postoperative laxative use after major abdominal surgery may result in earlier passage of stool, but does not influence other postoperative recovery parameters. Better data are required for postoperative complications and validated outcome measures.
Dudi-Venkata NN, Seow W, Kroon HM, Bedrikovetski S, Moore JW, Thomas ML, Sammour T.   +6 more
europepmc   +2 more sources

ARABIDOPSIS HOMOLOG OF TRITHORAX1 impacts lateral root development by epigenetic regulation of targets involved in root system architecture. [PDF]

New Phytol
Summary Developmental processes are regulated at multiple levels, including the epigenetic level. Among the epigenetic factors, histone H3 lysine 4 (H3K4) methyltransferases contribute to active transcription of target genes, and here, we explored how the H3K4 methyltransferase ARABIDOPSIS HOMOLOG OF TRITHORAX1 (ATX1) affects Arabidopsis thaliana ...
Napsucialy-Mendivil S, Torres-Martínez HH, Rodríguez-Alonso G, Rivera-Toro DM, Alvarez-Venegas R, Júarez-Verdayes MA, Shishkova S, Dubrovsky JG.   +7 more
europepmc   +2 more sources

Ectomycorrhizal fungi and the nitrogen economy of Nothofagus in southern Patagonia. [PDF]

Ecol Evol
Ectomycorrhizal fungi play essential roles in nitrogen cycling and plant nutrient uptake at high latitudes. However, they have disproportionately been studied in boreal forests dominated by evergreen conifers. We characterized ectomycorrhizal associations and the nitrogen economy of co‐occurring deciduous and evergreen angiosperms from the genus ...
Truong C, Gabbarini LA, Moretto A, Escobar JM, Smith ME.   +4 more
europepmc   +2 more sources