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Selection of Anti-gluten DNA Aptamers in a Deep Eutectic Solvent
Get PDFHerein, we show the feasibility of using deep eutectic solvents as a faster way of selecting aptamers targeting poorly water-soluble species. This unexplored concept is illustrated for gluten proteins. In this way, aptamer-based gluten detection can be performed directly in the extraction media with improved detectability. We envision deep implications for applications not only in food safety control but also in biomedicine.Instituto de Investigación Sanitaria del Principado de Asturias (ISPA
Acceleration of Gradient-Based Algorithms for Array Antenna Synthesis with Far Field or Near Field Constraints
Get PDFThis work presents a technique for the acceleration of gradient-based algorithms that employ finite differences in the calculation of the gradient for the optimization of array antennas. It is based on differential contributions, which takes advantage of the fact that when an array is optimized, each element is analyzed independently from the rest. Thus, the computation of the gradient of the cost function, which is typically the most time consuming operation of the algorithm, can be accelerated. A time cost study is presented and the technique is implemented, as an example, in the generalized Intersection Approach algorithm for array optimization in near and far fields. Several syntheses are performed to assess the improvement of this technique. In the far field, it is compared for periodic and aperiodic arrays using different approaches for the computation of the gradient, including the analytic derivative. A reflectarray is also optimized in the near field with the goal of improving its quiet zone. The technique of differential contributions shows important reductions in the time per iteration in all three syntheses, specially in that of aperiodic arrays and near field optimization, where the time saved in the evaluation of the gradient is greater than 99%.This work was supported in part by the European Space Agency (ESA) under contract ESTEC/AO/1-7064/12/NL/MH; by the Ministerio de Ciencia, Innovación y Universidades under project TEC2017-86619-R (ARTEINE), and through Programa "Clarín" de Ayudas Postdoctorales / Marie Curie-Cofund under project ACA17-09
Uniaxial stress flips the quantization axis of a quantum dot for integrated quantum photonics
Get PDFThe selection rules of optical transitions in epitaxial quantum dots are determined to a large extent by the orientation of their quantization axis, which is usually parallel to the growth direction. This configuration is well suited for single-photon sources embedded in vertically
emitting devices, but not ideal for planar photonic circuits because of the poorly controlled orientation of the transition dipoles in the growth plane. Here we show that, for relatively large and initially unstrained GaAs dots, the quantization axis can be flipped to lie in the growth plane
via moderate in-plane uniaxial stress. By using piezoelectric strain-actuators featuring strainamplification we study the evolution of the selection rules and excitonic fine-structure in a previously unexplored regime, in which quantum confinement can be seen as a perturbation
compared to strain in determining the symmetry-properties of the system. The experimental and computational results suggest that uniaxial stress – already employed for enhancing the performance of integrated electronic circuits – may be the right strategy to obtain quantum-light
sources with ideally oriented transition dipoles and enhanced oscillator strengths for integrated quantum photonic circuits
Antioxidantes y ácidos grasos en la leche de vaca según el tipo de alimentación
Get PDFTrabajo financiado por el INIA mediante el proyecto RTA2014-00086-C02, cofinanciado con fondos FEDER. S. De La Torre Santos está financiado por una beca de doctorado SENACYT-IFARHU. L. Abou El Qassim, está financiada por una beca del Instituto Agronómico Mediterráneo de Zaragoza.La leche por sus características nutricionales, tiene una gran importancia para el ser humano por su rol alimentario, proporcionando un elevado contenido de nutrientes en relación a su contenido calórico. Hoy en día, no sólo el valor nutricional, sino también otros componentes de la leche (antioxidantes y ácidos grasos) han atraído el interés por su importante relevancia en la salud humana y en el valor añadido de la leche y sus derivados. La composición de la leche determina su calidad nutricional e industrial, lo que, afecta directamente la rentabilidad y competitividad de la producción de leche (Chilliard et al, 2007; García y Panadero, 2012). Su composición es el reflejo de múltiples factores que pueden ser o no modificados a través de diferentes prácticas.
Los factores relacionados con la nutrición y el manejo de los rebaños lecheros pueden producir cambios que pueden ser observados a corto plazo. La composición de la leche es muy dependiente de la alimentación. Como el pago por calidad de la leche depende en gran medida de su proporción de proteína y grasa, tanto ganaderos como nutricionistas ponen especial atención en el racionamiento para optimizar dichos componentes. Sin embargo, otros componentes de interés se ven afectados por el sistema de producción y de alimentación.
En este trabajo se presentan los resultados de trabajos llevados a cabo en el SERIDA con objeto de evaluar la influencia del tipo de alimentación sobre la composición de antioxidantes y ácidos grasos en la leche
Modular three-phase ac-dc LED driver based on summing the light output of each phase
Get PDFThis work proposes the driving of high power Light-Emitting Diodes (LEDs) luminaires in three phase power grids using each phase to drive an independent LED load. The driving is done by means of a boost converter in charge of controlling the current across its LED load. Moreover, each boost converter needs to achieve Power Factor Correction (PFC) to comply with IEC 61000-3-2 Class C requirements. Hence, achieving unity Power Factor (PF) and low Total Harmonic Distortion (THD). Taking advantage of the light properties, the output of the LED driver will be the sum of the light of each of the phases. Therefore, a theoretical study will be carried out to observe the feasibility of removing the electrolytic capacitor while guaranteeing a flicker free behaviour of the LED luminaire, even if the current of each string is pulsating at twice the mains frequency. In order to validate the study, a prototype has been built comprised of three PFC boost converters disposing of their electrolytic capacitors. The designed prototype operates in the full range of the European three-phase line voltage, which varies between 380 V and 420 V, and it supplies an output light of 42.000 lm at a maximum power of 300 W while achieving an electrical efficiency of 97.5%.This work wassupported in part by the Spanish Government under Project aforementioned regulation, is based on a modular approach, MINECO-17-DPI2016-75760-R, in part by the Principality of Asturias under Severo Ochoa grant BP14-142, Project FC-15-GRUPIN14-143 and Project SVPA-17-RIS3-4, and in part by European Regional Development Fund (ERDF) grant
Residentes de Enfermería Familiar y Comunitaria: Cómo valoran su formación en las Unidades Españolas
Get PDFObjective
Know the degree of satisfaction and opinions of Family and Community Nursing residents in Spain.
Material and Methods
An observacional, cross sectional, descriptive study was performed. We contacted all the teaching units in Spain, which had Family and Community Nursing residents in the 2nd year. The study was explained to them and they were invited to participate by completing a survey, through Google Drive.
Results
40 teaching units participated of the 113 with which it was contacted.
A total of 88 surveys were received from a sample of 244 residents.
77.3% will choose your center again
80.7% felt in between satisfied and very satisfied with their main tutor.
The general satisfaction with the training in your center was 3 in a scale of 0 to 4.
The worst scored areas in the surveys were: research, obtained qualifications, dealing with complaints, quality survey results and improvement measures carried out by teaching units.
Conclusions
In general, have said to be feeling satisfied with their specialized training but there are areas with negative scores and differences in between the teaching units, which will be interesting to analyze, to be able to implement improvement measures which will help to continue increasing their quality.Objetivo
Conocer el grado de satisfacción y opiniones de los residentes de Enfermería Familiar y Comunitaria de España.
Material y Métodos
Estudio observacional descriptivo, de corte transversal. Se contactó con todas las Unidades Docentes de España, que acogían residentes de Enfermería Familiar y Comunitaria de 2º año. Se les explicó el estudio y se les invitó a participar rellenando una encuesta, a través de Google Drive.
Resultados
Participaron 40 unidades docentes de las 113 con las que se contactó.
Se recibieron un total de 88 encuestas de una muestra de 244 residentes.
El 77,3% volverían a elegir su centro.
El 80,7% refirieron sentirse entre Satisfechos y Muy Satisfechos con su tutor principal.
La satisfacción global con la formación en su centro se situó en torno al 3, en un baremo del 0 al 4.
Los sectores peor valorados en las encuestas fueron: Área de investigación, calificaciones obtenidas, tramitación de quejas, resultados de encuestas de calidad y acciones de mejora llevadas a cabo por las Unidades Docentes.
Conclusiones
En general, los residentes refieren sentirse satisfechos con su formación especializada; pero existen áreas calificadas negativamente y diferencias entre Unidades Docentes que sería interesante estudiar, para poder implementar acciones de mejora, que ayuden a seguir aumentando la calidad en las mismas
Optimization procedure of source/sink converters for DC power distribution nano-grids
Get PDFDC-Power Distribution Systems require DC-DC converters to interface all their elements. These converters should provide a high power quality and be efficient, compact and inexpensive. Furthermore, the characteristics of the loads and sources connected to these converters are not known beforehand and may change widely (there is no regulation about the DC loads, such as IEC61000-3-2 in AC grids). As a consequence, the design procedure is neither standard nor obvious. This work proposes an optimized design procedure for any Bus Provider in a DC-Power Distribution System. It is based on models, hence extensible to different Bus-Provider topologies, and takes into account the main issues in DC-Power Distribution Systems, especially the design conditions imposed by the wide variety of loads, or even sources, which may be connected to the output bus. Experimental results obtained from three designs show a close match with the analytical models and verify that the proposed procedure minimizes converter losses and complies with the requirements.Este trabajo ha sido financiado por el Gobierno de España a través del proyecto DPI2013-47176-C2-2-R y el Gobierno del Principado de Asturias a través del proyecto SV-PA-17-RIS3-4, la beca “Severo Ochoa” BP14-085 y los fondos FEDER.Nineteenth IEEE Workshop on Control and Modeling for Power Electronics, IEEE COMPEL 201
Jornadas Formativas y de Intercambio sobre Agricultura Ecológica en Zona Templado-Húmeda
Get PDFAsturias es una región con unas condiciones
agroclimáticas que favorecen
la práctica de la producción ecológica,
debido en gran parte a la riqueza en materia
orgánica del suelo, los recursos genéticos,
(variedades locales de cultivos y
las razas autóctonas), la gran diversidad
de flora y fauna beneficiosa existente, y
la estructura del paisaje reticulad