Results 81 to 90 of about 21,469 (240)

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

open access: yesAdvanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades   +7 more
wiley   +1 more source

Development of a detection system of enteric viral contamination for food satefy control [PDF]

open access: yes, 2015
La Comisión del Codex Alimentarius, perteneciente a la Organización Mundial de la Salud (OMS) y la Organización de las Naciones Unidas para la Alimentación y la Agricultura (FAO), ha propuesto guías para el control de la contaminación por virus entéricos
Barrios, Melina Elizabeth   +4 more
core  

Spin‐Split Edge States in Metal‐Supported Graphene Nanoislands Obtained by CVD

open access: yesAdvanced Materials, EarlyView.
Combining STM measurements and ab‐initio calculations, we show that zig‐zag edges in graphene nanoislands grown on Ni(111) by CVD retrieve their spin‐polarized edge states after intercalation of a few monolayers of Au. ABSTRACT Spin‐split states localized on zigzag edges have been predicted for different free‐standing graphene nanostructures.
Michele Gastaldo   +6 more
wiley   +1 more source

El presidente de Colombia y su elusión constitucional en época de crisis

open access: yesNovum Jus
El uso y abuso del estado de sitio en Colombia fue una constante durante los siglos XIX y XX. Por ello, el Constituyente de 1991 fue tan cuidadoso a la hora de regular los estados de excepción estableciendo un sistema  de exigentes límites y controles ...
David Mendieta   +1 more
doaj   +1 more source

Determination of Residual Monomers Released from Soft Lining Materials with the use of HPLC [PDF]

open access: yesPakistan Journal of Analytical & Environmental Chemistry, 2007
A study was carried out to examine the post polymerized leachability of three non phthalic and four phthalic residual monomers, from twelve commercially available soft lining materials, using HPLC. Specimens of equal dimensions were constructed from each
Afrodite Sofou   +3 more
doaj  

Unravelling the Secret of Sulfur Confinement and High Sulfur Utilization in Hybrid Sulfur‐Carbons

open access: yesAdvanced Materials, EarlyView.
Thermal condensation of inverse vulcanized sulfur‐carbon hybrids enables a bottom‐up sulfur confinement strategy, in which a protective carbon phase is progressively constructed around sulfur species. The resulting carbon nanodomains covalently tether sulfur chains and stabilize radical intermediates. This integrated architecture effectively suppresses
Tim Horner   +9 more
wiley   +1 more source

La Fiscalidad Internacional – (Amenazas y Oportunidades en un Entorno Competitivo)

open access: yesIuris Tantum, 2003
Dos de las amenazas más importantes con los que se ha encontrado la tributación internacional a lo largo de la historia, consisten en los problemas derivados de la doble tributación, por un lado y de la evasión o elusión fiscal, por el otro.
Héctor Moreno Núñez
doaj  

Physique de l’espace et phénoménologie de l’espace

open access: yesPhilosophia Scientiæ, 2011
What is space ? Why is there space rather than nothing ? Nowadays Physics claims to answer these questions without making any reference to the phenomenal space of the subject, and thus in total rupture with respect to its phenomenological meaning.
Gunnar Declerck
doaj   +1 more source

Polymorph‐Specific Electronic Transduction in WO3 during Molecular Sensing

open access: yesAdvanced Materials, EarlyView.
Metal‐oxide polymorphs with similar surface chemistry can nevertheless exhibit distinct sensing properties. In γ‐ and ε‐WO3, analyte adsorption appears comparable; yet, only ε‐WO3 induces a pronounced lattice electronic perturbation that accommodates charge in sub‐conduction band minimum states.
Matteo D'Andria   +6 more
wiley   +1 more source

Home - About - Disclaimer - Privacy