Results 21 to 30 of about 297,608 (270)

The isolation of gravitational instantons: Flat tori V flat R^4

open access: yes, 1994
The role of topology in the perturbative solution of the Euclidean Einstein equations about flat instantons is examined.Comment: 15 pages, ICN-UNAM 94 ...
A. Besse   +11 more
core   +1 more source

MHD Remote Numerical Simulations: Evolution of Coronal Mass Ejections [PDF]

open access: yes, 2008
Coronal mass ejections (CMEs) are solar eruptions into interplanetary space of as much as a few billion tons of plasma, with embedded magnetic fields from the Sun's corona.
A. R. González-Ponce   +4 more
core   +1 more source

Lo local y lo global de la colaboración científica: ¿qué significa, y cómo visualizarlo y medirlo?

open access: yesRevista Española de Documentación Científica, 2018
En un contexto en que hay gran interés en intensificar la colaboración internacional dentro de la práctica científica, este trabajo plantea un acercamiento sobre cómo medir y visualizar el trabajo colaborativo internacional a nivel institucional.
Nina Jung, Alejandro Arnulfo Ruiz-León
doaj   +1 more source

Una reflexión acerca del fútbol en Cuba

open access: yesLiminar: Estudios Sociales y Humanísticos, 2022
Reseña de Fútbol en Cuba. Entre el balón y “la pelota” en la comunidad global, de Miguel Lisbona Guillén. México: CIALC-UNAM/CIMSUR-UNAM, 2021.
Andrés Antonio Fábregas Puig
doaj   +1 more source

Revista Biblioteca Universitaria: una década de evolución

open access: yesRevista Española de Documentación Científica, 2009
Al cumplir diez años la Nueva Época de la revista Biblioteca Universitaria se hace un recuento de su trayectoria, contenidos y temas tratados, así como del trabajo editorial que permitió elevar la difusión y la calidad de la revista, tanto en términos de
Felipe Rafael Reyna Espinosa
doaj   +1 more source

Doryctopambolus nunes & Zaldívar-Riverón (Braconidae), a new Neotropical doryctine wasp genus with propodeal spines [PDF]

open access: yes, 2012
The new Neotropical doryctine genus Doryctopambolus gen. n. is erected to contain D. pilcomayensis (van Achterberg & Braet, 2004), comb. n., which was previously placed within Pambolus (Pambolinae), as well as three new species, D. clebschi sp.
Briceño, Rosa   +6 more
core   +2 more sources

Thermally Modulated Metasurface Sensor for Dynamic and Time‐Resolved Isolation of Extracellular Vesicles

open access: yesAdvanced Materials, EarlyView.
A thermally adaptive plasmonic metasurface, functionalized with poly(N‐isopropylacrylamide) (PNIPAM) and anti‐CD63 antibodies, enables precise, on‐demand capture and release of extracellular vesicles (EVs). Delivering high recovery, improved purity, and intact vesicle structure, the platform offers a versatile, label‐free solution for real‐time EV ...
Beyza Nur Kucuk   +7 more
wiley   +1 more source

Microbiota composition of the dorsal patch of reproductive male Leptonycteris yerbabuenae. [PDF]

open access: yes, 2019
Bacteria and other types of microbes interact with their hosts in several ways, including metabolic pathways, development, and complex behavioral processes such as mate recognition.
Cerqueda-García, Daniel   +5 more
core   +2 more sources

High‐Power Rapid Laser‐Induced Synthesis of Multi‐functional Cobalt Metal‐Organic Framework With an Unprecedented Synthesis Efficiency

open access: yesAdvanced Materials Technologies, EarlyView.
Laser‐assisted synthesis enables rapid (within 1 h) and high‐yield (≥90%) production of Co‐MOFs with mesoporous structures, tunable magnetic and optical properties, and efficient adsorption of N2, CH4, and CO2 for low‐energy gas separation. DFT calculations elucidate the electronic structure and adsorption behavior.
Saliha Mutlu   +10 more
wiley   +1 more source

An Accessible Microfluidic Platform for the Generation of Polarized Brain Organoids

open access: yesAdvanced Materials Technologies, EarlyView.
This study presents an accessible double‐gradient microfluidic device that enables controlled morphogen delivery and spatially polarized differentiation in brain organoids. By integrating a pump‐free design and stable fabrication method, the platform generates dorsal–ventral neuronal asymmetry, offering a reproducible and versatile approach to model ...
Daniel Pérez‐Calixto   +6 more
wiley   +1 more source

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