Results 51 to 60 of about 204,250 (183)

Differential xylem phytohormone export from dry and wet roots during partial rootzone drying is independent of shoot‐to‐root transport in soybean

Physiologia Plantarum, Volume 177, Issue 3, May/June 2025.
Abstract Different phytohormones can act as root‐to‐shoot signalling molecules in response to soil drying. Recent findings suggest that root ABA levels are predominantly leaf‐sourced and not locally synthesized, thus, ABA exported from the roots in the xylem is mostly recycled from the shoot.
Jaime Puértolas, Pedro Castro‐Valdecantos, Alfonso Albacete, Ian C. Dodd   +3 more
wiley   +1 more source

Comportamiento tribológico del acero U13A con endurecimiento localizado mediante láser de Nd: YAG

Revista de Metalurgia, 1999
Para disminuir el desgaste en los sistemas tribológicos frecuentemente se llevan a cabo endurecimientos localizados en aquellas áreas sometidas a esfuerzos y que están sujetas a desgaste.
R. Sagaro, J. S. Ceballos, J. Mascarell, A. Blanco   +3 more
doaj   +1 more source

Virtual assembly rapid prototyping of near net shapes [PDF]

, 2009
Virtual reality (VR) provides another dimension to many engineering applications. Its immersive and interactive nature allows an intuitive approach to study both cognitive activities and performance evaluation.
Corney, Jonathan, Lim, Theodore, Medellin, Hugo, Ritchie, James, Sung, Raymond   +4 more
core  

River Mouth Hydrodynamics: The Role of the Outlet Geometry and Transient Tidal and River Discharge Conditions on the Jet Structure

Journal of Geophysical Research: Oceans, Volume 130, Issue 1, January 2025.
Abstract The hydrodynamics of river mouths are the result of a complex interaction between river flow, tidal conditions, and outlet geometry. This complex interaction of factors shapes the jet that flows onto the continental shelf and influences the dynamics of these areas.
Antonio Ruiz‐Reina, Alejandro López‐Ruiz, Miguel Ortega‐Sánchez   +2 more
wiley   +1 more source

Análisis de la avería de un generador de escamas de hielo. // Analysis of the failure of ice flake generator.

Ingeniería Mecánica, 2008
En el trabajo se realizó una investigación para esclarecer las causas de la avería del generador de escamas de hielo No.1 dela empresa EPICIEN de Cienfuegos el cual fue instalado recientemente y fue suministrado por la firma Frigofrance S.A.Desde su ...
R. Goytisolo Espinosa, J. G. Noa Aguila, L. Castellanos González, A. Borroto Nordelo, S. Montelier Hernández, A. Fernández Cañizares   +5 more
doaj  

Gender‐Based Differences in the Biomechanical Behavior of the Thorax During CPR Maneuvers

International Journal for Numerical Methods in Biomedical Engineering, Volume 40, Issue 12, December 2024.
Cardiopulmonary resuscitation (CPR) is a common emergency procedure for cardiac arrest. This study presents numerical experiments simulating this maneuver in both genders to determine the optimal location and force for chest compressions. By analyzing deformation and stress, this investigation demonstrates that the ideal compression point is lower on ...
María Ferrón‐Vivó, María José Rupérez   +1 more
wiley   +1 more source

Diseño y simulación de equipo medico quirúrgico

Revista Politécnica, 2010
Resumen.- El sector de la salud en nuestro país enfrenta problemas económicos, estructurales, de infraestructura, de recursos humanos especializados, faltas de planificación y en consecuencia entrega resultados deficientes; esto, se concreta en la mala ...
Ivan Zambrano, Ricardo Soto, Adrián Haro, Mariela Cordero   +3 more
doaj  

Evaluación de la calidad superficial de piezas mecanizadas a partir del análisis de la fuerza de corte

Revista de Metalurgia, 1998
El grado de acabado superficial de una pieza mecanizada es uno de los factores determinantes a la hora de establecer los parámetros de corte necesarios para llevar a cabo el proceso de mecanizado.
M. Sánchez-Carrillero, M. Marcos, M. Álvarez-Alcón, V. M. Sánchez-Corbacho   +3 more
doaj   +1 more source

Diseño, construcción e instrumentación de un colector solar [PDF]

, 2018
El presente documento expone las fases del desarrollo en la construcción de un colector solar experimental de placa plana, como base necesaria para el desarrollo de tecnología en energías renovables en la Universidad Tecnológica de Pereira ...
Chávez Figueroa, Iván Alexánder, Díaz Porres, Norman David   +1 more
core  

Spark plasma sintering of hard wear‐resistant graphene nanoplatelet–reinforced TiB2 + SiC composites from TiC–B4C–SiC

Journal of the American Ceramic Society, Volume 107, Issue 12, Page 8521-8529, December 2024.
Abstract Graphene nanoplatelet (GNP)–reinforced TiB2 + SiC composites were fabricated by reactive spark plasma sintering (SPS) from a TiC–B4C–SiC powder mixture with equal‐volume percentages, optimizing their SPS temperature and evaluating their unlubricated sliding wear against diamond. First, it is shown that during the heating ramp of the SPS cycle,
Jesús López‐Arenal, Victor Zamora, Fernando Guiberteau, Angel L. Ortiz   +3 more
wiley   +1 more source