Results 11 to 20 of about 9,769 (191)

Elastic and inelastic strain in submicron-thick ZnO epilayers grown on r-sapphire substrates by metal-organic vapour phase deposition. [PDF]

Acta Crystallogr B Struct Sci Cryst Eng Mater
Sub‐micron a‐ZnO epilayers (12 to 770 nm) grown on r‐sapphire by MOCVD have been analysed using SEM, HRXRD, UPS, XPS and HRTEM. The distortion of the unit cell has been determined and the consequent strain shows a transition from an inelastic to an elastic state, separated by a critical thickness; a method to experimentally determine this critical ...
Martinez-Tomas MC, Klymov O, Shimazoe K, Sánchez-Royo JF, Changarath ME, Agouram S, Muñoz-Sanjosé V.   +6 more
europepmc   +2 more sources

Short communication: A simple and accurate method of measuring the zeta‐potential of microfluidic channels

ELECTROPHORESIS, Volume 43, Issue 12, Page 1259-1262, June 2022., 2022
Abstract We describe an improved method for determining the electroosmotic mobility and zeta potential of surfaces based on a current‐monitoring method. This technique eliminates the requirement for measurements of channel dimensions and sample conductivities, leading to a simple high precision measurement.
Raúl Fernández‐Mateo, Pablo García‐Sánchez, Víctor Calero, Antonio Ramos, Hywel Morgan   +4 more
wiley   +1 more source

Magnetic-Assisted Control of Eggs and Embryos via Zona Pellucida-Linked Nanoparticles. [PDF]

Adv Sci (Weinh)
Novel method to specifically attach magnetic nanoparticles (NP) through OVGP1 (Ov) protein to the external matrix that surround eggs and embryos. Labeled reproductive cells can be moved or retained in response to a magnetic force while preserving their competence.
García-Vázquez FA, Garrappa G, Luongo C, Hamze JG, Caballero M, Marco-Jiménez F, Vicente Antón JS, Molina-Cuberos GJ, Jiménez-Movilla M.   +8 more
europepmc   +2 more sources

Coexistence in neutral theories: interplay of criticality and mild local preferences [PDF]

, 2014
Neutral theories have played a crucial and revolutionary role in fields such as population genetics and biogeography. These theories are critical by definition, in the sense that the overall growth rate of each single allele/species/type vanishes.
Borile, Claudio, Maritan, Amos, Molina-Garcia, Daniel, Muñoz, Miguel A.   +3 more
core   +2 more sources

Estrategias de aprendizaje utilizadas por los estudiantes del 5to año de Educación Media General en el contenido de electromagnetismo

Revista Franz Tamayo, 2021
El objetivo general de dicha investigación consistió en analizar las estrategias de aprendizaje utilizadas por estudiantes del 5to año de Educación Media General en el contenido del electromagnetismo.
Eliuz Katerine Villamizar Rodríguez
doaj   +1 more source

A 10-way power divider based on a transducer and a radial junction operating in the circular TM01 mode [PDF]

, 2019
This work presents a 10-way Ku-band power divider using a mode transducer and a radial junction connected by an overmoded circular waveguide operating in the TM 01 mode. The circular symmetry of this mode has been exploited to obtain a power divider with
Montejo Garai, José R., Rebollar, Jesús M., Ruiz Cruz, Jorge A.   +2 more
core   +2 more sources

Dificultades de aprendizaje de los estudiantes universitarios en la teoría del campo magnético y elección de los objetivos de enseñanza [PDF]

, 2003
El objetivo principal de este trabajo es analizar las ideas que tienen los estudiantes sobre cuál es la naturaleza del campo magnético. Hemos supuesto que el conocimiento significativo de la fuente del campo magnético es un prerrequisito básico para que ...
Almudí García, José Manuel, Guisasola Aranzabal, Jenaro, Zubimendi Herranz, José Luis   +2 more
core   +2 more sources

Operational transconductance amplifier-based nonlinear function syntheses [PDF]

, 1989
It is shown that the operational transconductance amplifier, as the active element in basic building blocks, can be efficiently used for programmable nonlinear continuous-time function synthesis.
Linares Barranco, Bernabé, Ramírez Angulo, Jaime, Rodríguez Vázquez, Ángel Benito, Sánchez Sinencio, Edgar   +3 more
core   +1 more source

Evaluation of Implanted Stent Occlusion Status Based on Neointimal Tissue Bioimpedance Simulations

Journal of Sensors, Volume 2019, Issue 1, 2019., 2019
This paper describes the characterization of the light hole, also known as the lumen, in implanted stents affected by restenosis processes using bioimpedance (BI) as a biomarker. The presented approach will enable real‐time monitoring of lumens in implanted stents.
J. M. Portillo-Anaya, P. Pérez, A. Olmo, G. Huertas, A. Yúfera, Roberto Paolesse   +5 more
wiley   +1 more source

Efectos de la corriente eléctrica directa en el tumor murinho subcutáneo de Ehrlich. I: Estúdios de necrosis y volumen dei tumor em estádios avanzados

Revista Brasileira de Cancerologia, 2022
  La electroterapia con corriente eléctrica directa se aplico a un modelo de tumor murinho subcutáneo (tumor de Ehrlich). La corriente fue suministrada a través de electrodos de Pt, donde el cátodo fue introducido directamente en los tumores y el ...
Luis Bergues Cabrales, Richard Hinojosa Aldana, Rodolfo Pérez Bruzón, Héctor Camué Ciria, Liban Montes de Oca Gonzáiez, Catalina Suárez Quevedo, Alcibiades Lara Lafargue, Ramón Ropero Toirac, Alfredo Fong Reyes   +8 more
doaj   +1 more source