Search results for "RARA"

Nanomateriales basados en lantánidos: caracterización y visualización

2022

Las nanopartículas upconversion (UCNP) comenzaron a desarrollarse a inicios del presente siglo, generando una gran expectación e interés por sus propiedades fotofísicas particulares. Las UCNP son nanomateriales capaces de producir el fenómeno upconversion (UC) mediante el cual fotones de baja energía (de la región del infrarrojo cercano, NIR) se transforman en fotones de alta energía (en la región del UV-vis). Los principales actores del fenómeno son los iones lantánidos que se encuentran como dopantes de una matriz nanométrica transparente. Por tanto, en las UCNP, a diferencia de las nanopartículas (NP) semiconductoras, el confinamiento nanométrico no es el responsable de las propiedades ó…

Identificación de variantes genéticas poco frecuentes y raras en Diabetes mellitus tipo 2 mediante secuenciación de exoma

2015

Identificación de variantes genéticas poco frecuentes y raras en diabetes mellitus tipo 2 mediante secuenciación de exoma. La diabetes mellitus tipo 2 (DM2) se ha convertido en una epidemia global que contribuye significativamente a la morbi-mortalidad prematura. La DM2 es resultado de múltiples factores, incluyendo ambientales, genéticos y adquiridos. Se ha demostrado que la heredabilidad de la DM2 se encuentra alrededor del 70%. No obstante, los estudios realizados sólo han podido identificar una pequeña proporción del componente genético de la enfermedad. El resto del componente podría residir, en parte, en variantes genéticas poco frecuentes (MAF 20 y con valores predictivos de alteraci…

Bases genéticas y celulares de neuropatías periféricas hereditarias

2015

Tesis doctoral; 208 págs.

Rational design and modelling of f-block molecular nanomagnets

2016

Los imanes monomoleculares o moléculas imán, por sus siglas en inglés SMMs, han suscitado una gran atención en los últimos años debido a sus extraordinarias propiedades físicas. Los cristales de este tipo de moléculas se caracterizan por presentar relajación lenta de la magnetización a baja temperatura, así como curvas de histeresis magnética. Estas moléculas se encuentran entre las entidades con comportamiento magnético más complejas, mostrando fenómenos cuánticos tales como efecto túnel en la magnetización, coherencia cuántica o interferencia cuántica. Por esto, se han postulado como candidatos prometedores para el diseño de bits cuánticos (qubits) de espín en computación cuántica. La pri…

Contributo alla conoscenza del Toporagno acquatico di Miller, Neomys anomalus Cabrera, 1907 e del Toporagno d'acqua [Neomys fodiens (Pennant, 1771)] …

2006

26 pages

Autour de l’équation de Schrödinger non-linéaire dans les fibres optiques : similaritons, régénération, sources fibrées et évènements extrêmes

2009

Complex rogue wave in the fiber optics

2016

This manuscript presents the generation of complex rogue waves related to nonlinear instabilities occurring through the propagation of light in standard optical fibers. Linear and nonlinear physical phenomena involved are first listed, in particular some of them by analogy with the field of hydrodynamics. The different forms of rogue waves induced by the modulation instability process are then presented. They are also known as "breathers", and they are obtained by solving the nonlinear Schrödinger equation. From these exact solutions, various experimental systems were designed by means of numerical simulations based on two rogue-wave excitation methods. The first one is an exact generation …

Growth response of the saltbush Atriplex nummularia L. to inoculation with the arbuscular mycorrhizal fungus Glomus intraradices

2005

Abstract Plantlets of Atriplex nummularia were inoculated with the arbuscular mycorrhizal fungi Glomus intraradices in a pot experiment. Plants were grown in a low P soil. Highly significant growth response of a Chenopodiaceae was recorded for the first time. Mycorrhizal colonization of roots was well developed, internal hyphae and vesicles were observed, but not arbuscules. These observations suggest that arbuscules are not necessary to obtain significant growth stimulation from mycorrhizal inoculation. Atriplex nummularia is already used as forage crops, its high mycorrhizal dependency offers possibilities to develop this production and revegetation strategies.

Medicago truncatula

2012

In plants, long distance transport of sugars from photosynthetic source leaves to sink organs comprises different crucial steps depending on the species and organ types. Sucrose, the main carbohydrate for long distance transport is synthesized in the mesophyll and then loaded into the phloem. After long distance transport through the phloem vessels, sucrose is finally unloaded towards sink organs. Alternatively, sugar can also be transferred to non‐plant sinks and plant colonization by heterotrophic organisms increases the sink strength and creates an additional sugar demand for the host plant. These sugar fluxes are coordinated by transport systems. Main sugar transporters in plants compri…

Transcriptional response of Medicago truncatula sulphate transporters to arbuscular mycorrhizal symbiosis with and without sulphur stress

2013

Sulphur is an essential macronutrient for plant growth, development and response to various abiotic and biotic stresses due to its key role in the biosynthesis of many S-containing compounds. Sulphate represents a very small portion of soil S pull and it is the only form that plant roots can uptake and mobilize through H(+)-dependent co-transport processes implying sulphate transporters. Unlike the other organically bound forms of S, sulphate is normally leached from soils due to its solubility in water, thus reducing its availability to plants. Although our knowledge of plant sulphate transporters has been growing significantly in the past decades, little is still known about the effect of…