Results 21 to 30 of about 1,359 (141)

Editorial

Publicaciones e Investigación, 2016
De la tecnología se afirma que es la aplicación práctica del conocimiento; partiendo de esta acepción, se puede asegurar que en casi todas las actividades diarias que realizamos está implícita la utilización de un dispositivo tecnológico y, dentro del ...
Nelly Morales Pedraza
doaj   +1 more source

Acceptor‐Doped Cerium Oxides Enabling Metallic Nanocatalyst Exsolution for Hydrogen Production From Ammonia

Angewandte Chemie International Edition, EarlyView.
Outstanding catalytic results for NH3 decomposition for H2 production were obtained with metallic Ru, Rh, and RuRh nanoparticle‐exsolved CeO2‐based catalysts. Significant lower amounts of available superficial metallic fractions were needed in comparison to conventional Ru‐impregnated materials.
Andrés López‐García, Elena Barrio‐Querol, Álvaro Represa, Jesús Ara, Ana B. Hungría, David Catalán‐Martínez, Alfonso J. Carrillo, Sonia Escolástico, José Manuel Serra   +8 more
wiley   +1 more source

On the Feasibility of Implementing a Four-Quadrant CMOS Analog Multiplier Using Only Digital Inverter Standard-Cells as Building Blocks

IEEE Access
This work introduces the first four-quadrant CMOS analog multiplier circuit built entirely from digital inverter standard cells, without requiring any analog transistor-sizing methodologies.
Gregorio Zamora-Mejia, Victor H. Carbajal-Gomez, Alejandro Silva-Juarez, Luis C. Alvarez-Simon, Alejandro Diaz-Sanchez, Sergio A. Rosales-Nunez, Julio N. Hernandez-Perez, Rodrigo Jaramillo-Ramirez, Ernesto Conde-Almada, Alejandro I. Bautista-Castillo, Jose M. Rocha-Perez   +10 more
doaj   +1 more source

Production of recombinant human granulocyte‐macrophage colony‐stimulating factor in thermoinducible E. coli: Tuning inclusion body architecture and protein yield via dissolved oxygen control

Journal of Chemical Technology &Biotechnology, EarlyView.
Abstract BACKGROUND Recombinant protein expression in Escherichia coli frequently results in the formation of inclusion bodies (IBs), which provide high protein accumulation but often require additional steps to recover functional protein. Although culture conditions strongly influence IB physicochemical and structural characteristics, the impact of ...
Ximena Gómez‐Gil, Norma A Valdez‐Cruz, Sara Restrepo‐Pineda, Nuria Sánchez‐Puig, Rafael Vázquez‐Duhalt, Rubén D Cadena‐Nava, Néstor O Pérez, Mauricio A Trujillo‐Roldán   +7 more
wiley   +1 more source

iSensMex-POT, a Potentiostat Platform for Human Health Applications

IEEE Access
This work introduces the iSensMEX-POT platform, a potentiostat-based detection system for conducting cyclic voltammetry measurements. It consists of a mixed-mode application-specific integrated circuit (ASIC) and a user digital interface unit based on ...
Gregorio Zamora-Mejia, Victor H. Carbajal-Gomez, Luis C. Alvarez-Simon, Alejandro Silva-Juarez, Alejandro I. Bautista-Castillo, Sergio A. Rosales-Nunez, Jose M. Rocha-Perez, Francisco Barbosa-Escudero, Margarita Sanchez-Dominguez, Daniel Durini   +9 more
doaj   +1 more source

Nonlinear optical properties of Au-nanoparticles conjugated with lipoic acid in water [PDF]

Journal of the European Optical Society-Rapid Publications, 2014
Gold nanoparticles were chemically conjugated with lipoic acid to control their optical properties. Z-scan and other optical techniques were used to characterize the non-linear behavior of the resulting nanostructured materials. The results show that the
Trejo-Durán M., Cornejo-Monroy D., Alvarado-Méndez E., Olivares-Vargas A., Castaño V. M.   +4 more
doaj   +1 more source

Physiological and Sleep Profiles in Insomnia, OSA and COMISA: A Comparative Study in Portugal and Spain

Journal of Sleep Research, EarlyView.
ABSTRACT Insomnia and obstructive sleep apnea (OSA) are common sleep disorders that often co‐occur as comorbid insomnia and sleep apnea (COMISA), worsening health outcomes. This study characterized and compared the physiological and sleep profiles of insomnia, OSA and COMISA in population‐based datasets from Portugal (n = 147) and Spain (n = 264 ...
Margarida Carvalho, Eva Almeida, Pedro Amorim, Marta Drummond, Adrián Martín‐Montero, Gonzalo C. Gutiérrez‐Tobal, Tomás Ruiz‐Albi, Julio De Frutos, Pedro Pereira Rodrigues, Daniela Ferreira‐Santos   +9 more
wiley   +1 more source

Modelo de operación de la biblioteca nacional de ciencia y tecnología del instituto politécnico nacional

Encontros Bibli, 2001
Propuesta para un modelo de operación de la Biblioteca Nacional de Ciencia y Tecnología del Instituto Politécnico Nacional, en la que se hacen algunas consideraciones estratégicas con relación a la creación de servicios bibliotecarios, destinadas a la ...
Noel Ângulo Marcial
doaj   +1 more source

Sundman‐Like Transformations and the NRT Nonlinear Schrödinger Equation

Mathematical Methods in the Applied Sciences, Volume 49, Issue 13, Page 14791-14810, 15 September 2026.
ABSTRACT We present a new generalization of the well‐known power‐type Sundman transformation, involving not only powers of the function but also of its derivative, along with its inverse. Our aim is to explore the use of such transformations in the derivation of solutions of ordinary differential equations and in the study of their properties.
P. R. Gordoa, A. Pickering, D. Puertas‐Centeno, E. V. Toranzo   +3 more
wiley   +1 more source

Photon Recycling–Driven Photodetection Enhancement in Ni(AcO)2–MAPbBr3 Nanocomposite Waveguides

Nanophotonics, Volume 15, Issue 13, 13 July 2026.
Photon recycling is demonstrated as an effective mechanism to enhance perovskite photodetector performance. A Ni(AcO)2/MAPbBr3 nanocomposite waveguide enables long‐range propagation and reabsorption of photoluminescence photons, increasing photocurrent by ∼60%. Under pulsed excitation, reabsorption of amplified spontaneous emission further enhances the
Sandra Soriano‐Díaz, Jaume Noguera‐Gómez, Diego Ramírez‐Muñoz, Pablo P. Boix, Juan P. Martínez‐Pastor, Rafael Abargues, Isaac Suárez   +6 more
wiley   +1 more source