The dynamics near quasi-parabolic fixed points of holomorphic diffeomorphisms in C-2

Let F be a germ of holomorphic diffeomorphism of C-2 fixing O and such that dF(O) has eigenvalues 1 and e(itheta) with \e(itheta)\ = 1 and e(itheta) not equal 1. Introducing suitable normal forms for F we define an invariant, nu(F) greater than or equal to 2, and a generic condition, that of being dynamically separating. In the case F is dynamically separating, we prove that there exist nu(F) - 1 parabolic curves for F at O tangent to the eigenspace of 1

Contaminant source identification in groundwater by means of artificial neural network

In a desired environmental protection system, groundwater may not be excluded. In addition to the problem of over-exploitation, in total disagreement with the concept of sustainable development, another not negligible issue concerns the groundwater contamination. Mainly, this aspect is due to intensive agricultural activities or industrialized areas. In literature, several papers have dealt with transport problem, especially for inverse problems in which the release history or the source location are identified. The innovative aim of the paper is to develop a data-driven model that is able to analyze multiple scenarios, even strongly non-linear, in order to solve forward and inverse transport problems, preserving the reliability of the results and reducing the uncertainty. Furthermore, this tool has the characteristic of providing extremely fast responses, essential to identify remediation strategies immediately. The advantages produced by the model were compared with literature studies. In this regard, a feedforward artificial neural network, which has been trained to handle different cases, represents the data-driven model. Firstly, to identify the concentration of the pollutant at specific observation points in the study area (forward problem); secondly, to deal with inverse problems identifying the release history at known source location; then, in case of one contaminant source, identifying the release history and, at the same time, the location of the source in a specific sub-domain of the investigated area. At last, the observation error is investigated and estimated. The results are satisfactorily achieved, highlighting the capability of the ANN to deal with multiple scenarios by approximating nonlinear functions without the physical point of view that describes the phenomenon, providing reliable results, with very low computational burden and uncertainty.Comment: Published on Journal of Hydrolog

Tannin-rich extracts improve the performance of amidated pectin as an alternative microencapsulation matrix to alginate

This work was funded by Teagasc, the Irish Agricultural and Food Development Authority (Fermoy, Ireland), by the “Plan propio de Investigaci ́on y Transferencia” of the University of Granada under both programs “Intensificaci ́on de la Investigaci ́on, modalidad B′′ and by the European Research Commission (Research Executive Agency) under the research project Stance4Health (Grant Contract N 816303) granted to Jos ́e A. Rufi ́an-Henares.Microencapsulation of tannin extracts through extrusion-gelation method was performed comparing two alter- native encapsulation matrices: alginate and amidated pectin. The microstructure of the generated microbeads was studied, as well as their microencapsulation efficiency and release properties. Overall, pectin-based beads performed better than their alginate-based counterparts. This, combined with a greater incorporation of tannins in the feed formulations led to a higher tannin load in the final beads. The best microencapsulation efficiency was given by pectin microbeads loaded with 10% tannin extract (w/w), but the final tannin content could be further increased by adding a 20% (w/w) concentration of the extracts. During a 14-days storage, only a marginal loss of tannins was recorded for pectin-based microbeads. The results reveal that great potential exists in producing pectin-based microbeads in presence of tannins, which allow better loading capacities and improving structural properties, thanks to the interactions between the tannins and the amidated polysaccharide.Teagasc, the Irish Agricultural and Food Development Authority (Fermoy, Ireland)Plan propio de Investigación y Transferencia” of the University of Granada under both programs “Intensificación de la Investigación, modalidad BEuropean Research Commission (Research Executive Agency) under the research project Stance4Health (Grant Contract N 816303

Conservación del elemento boreo-alpino del sistema central: Microrreserva de los circos de Cerezuelo y Buitrera

El entorno del Pico del Lobo es uno de los enclaves del Sistema Central con una mayor diversidad de taxones eurosiberianos y boreo-alpinos, presentando además diversos hábitats de carácter atlántico y orófilo bien conservados. La presencia en la zona de dos especies del Catálogo de Flora Protegida regional,Swertia perennis L. y Huperzia selago (L.) Bernh. ex Schrank & Mart .subsp. selago y en el marco del Decreto 63/2007 de la Junta de Castilla y León, se propone la creación de la presente Microrreserva de Flora

Correlación clínica entre la fragmentación espermática y la presencia de aneuploidías en el espermatozoide

Desde que en 1978 naciera Louise Browm, el primer bebé probeta del mundo, las Técnicas de Reproducción Asistida (TRA en adelante) han ido evolucionando en aras de mejorar y facilitar los resultados y procedimientos utilizados para conseguir un embarazo. Actualmente la esterilidad por alteraciones genéticas en alguno de los gametos es considerada la causa de más difícil solución dentro de estas técnicas, por lo que la mayor parte de los esfuerzos en investigación en la actualidad van dirigidos a detectar posibles alteraciones genéticas y/o cromosómicas en el óvulo y espermatozoide y a la selección de gametos con una dotación cromosómica correcta. En los últimos años se han desarrollado técnicas de selección genética (MACS y/o PICSI) con la intención de detectar y descartar espermatozoides con un alto grado de fragmentación en su DNA. Además recientes estudios parecen indicar que el uso de estas técnicas también es válido para seleccionar espermatozoides cromosómicamente normales evitando con ello la generación de embriones con aneuploidías por causa espermática. A lo largo de este trabajo se va a intentar demostrar cómo estas técnicas de Selección Genética en el Espermatozoide (SGE en adelante) permiten la selección de espermatozoides sin fragmentación en su DNA y cromosómicamente normales. Todo ello de forma sencilla y no invasiva. De esta forma evitaremos la fecundación del óvulo por espermatozoides que nunca conseguirían dar un embarazo a término, ya que, como mucho, acabarían originando embarazos no evolutivos con desenlace de aborto o generando niños con problemas en el peor de los casos

Multiculturalism in Second Language Classrooms: literature as a resource in Primary Education

RESUMEN: En este artículo presentamos una investigación que versa sobre la importancia de la literatura de contextos culturales múltiples en el aula de segundas lenguas. En concreto, la revisión bibliográfica está encaminada a apoyar la propuesta de algunas lecturas que sirvan como ejemplo de cómo llevar a cabo en el aula de Educación Primaria la lectura de textos literarios que sustenten la competencia cultural y comunicativa del discente de inglés como lengua extranjera en Educación Primaria.ABSTRACT: In this paper we present research about the importance of literature from multiple cultural backgrounds in the second language classroom. The literature review supports a proposal for specific readings. These are used as an example on how to incorporate texts in the classroom that motivate the development of cultural and communicative competences for students of English as a second language in a primary education context

Reconstructing forest history from archaeological data: A case study in the Duero basin assessing the origin of controversial forests and the loss of tree populationsof great biogeographical interest

The study of more than 700 charcoals from the Vaccaean settlement of Pintia (Padilla del Duero, Valladolid) provides new local and detailed data about the Iron Age II forest composition in Continental–Mediterranean inland Spain. Pinus gr. sylvestris/nigra (from which an unexpectedly high number of charcoals were identified), together with Mediterranean pines (also highly represented), Juniperus L. and evergreen and deciduous Quercus, were the main taxa living in the area, revealing two different marked biogeographical elements in the late-Holocene landscapes of the Duero basin: Mediterranean and Eurosiberian. On one hand, the results shed new light on the assessment of the origin of Mediterranean pinewoods in the area. On the other hand, the charcoal assemblage of Pintia reveals a more important presence of the current Mediterranean highland pines in the lowlands of the Central Iberian Peninsula in the late-Holocene suggesting the existence of interglacial refugia. Finally, this work highlights palaeoecological studies as valuable tools to support decisions on forest management related to conservation and restoration of our natural heritage

Influence of grazing on meat oxidation in light lamb

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Efecto del tiempo de suplementación con vitamina E o pastoreo con alfalfa en el contenido de alpha-tocoferol en plasma y carne en la oxidación lipídica en corderos ligeros

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