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Variedades de maíz : actualización año 2015
Get PDFOtro tít.: 20 años de evaluación de variedades de Maíz en Asturias (1996-2015)Desde hace años, empresas de diversos países se han dedicado a mejorar
genéticamente numerosos caracteres de la semilla de maíz mediante hibridación,
lo que conlleva que en un momento dado, el número de variedades
comerciales presentes en el mercado puede llegar a ser muy elevado y con
grandes diferencias entre sí. Estas variedades mejoradas por hibridación se clasifican
mediante su ciclo FAO, el cual se establece en función de la integral térmica
(acumulación de horas con una temperatura entre 6 y 30ºC) desde el
nacimiento, hasta alcanzar la madurez fisiológica (granos con un 70% de materia
seca).El objetivo de esta evaluación es que exista información veraz y adaptada a
la hora de elegir las variedades a sembrar al año siguiente, conforme a resultados
de comportamiento agronómico y contenido en principios nutritivos en una
zona determinada
High power factor modular polyphase AC/DC converters with galvanic isolation based on resistor emulators
Get PDFThis work has been supported by the Spanish Government under Project MINECO-13-DPI2013-47176-C2-2-R and the Principality of Asturias under the grants “Severo Ochoa” BP14-140 and BP14-85 and by the Project FC-15-GRUPIN14-143 and by European Regional Development Fund (ERDF) grants.This paper deals with a modular, isolated-output, polyphase, AC/DC converter based on the use of Resistor Emulators (REs). A RE is a DC/DC converter that behaves as a resistor at its input port. The value of this resistor (input impedance) is controlled by the converter duty cycle. In the proposed topology, all the REs are controlled to have the same input impedance, whose value is determined by the outputvoltage feedback loop. Also the power processed by each RE is the same. As a consequence, the total power is distributed (and also the power losses), thus allowing us to build a modular system. Moreover, the behavior of these DC/DC converters as REs also allows their connection in series and/or in parallel with perfect sharing of voltage (when connected in series) and current (when connected in parallel). This fact makes possible to extend the proposed solution to high power applications
Une approche méthodologique des humanités numériques appliquées à l'étude du corpus aljamiado.
Get PDFMondes arabes et comparatisme: pratiques pédagogiques
Bacteriophages: The Enemies of Bad Bacteria Are Our Friends!
Get PDFSome bacteria can enter the human body and make people ill. Usually, these diseases can be cured by antibiotics, but sometimes bacteria are resistant to them, meaning that the antibiotics do not kill the bacteria. In these cases, bacteria become very dangerous. Bacteriophages are viruses that infect bacteria but are harmless to humans. To reproduce, they get into a bacterium, where they multiply, and finally they break the bacterial cell open to release the new viruses. Therefore, bacteriophages kill bacteria. Here, we explain how bacteriophages can be used to treat infectious diseases or to remove bacteria from other places where they are unwanted
Development and evaluation of CaO-based materials for thermochemical energy storage based on the CaO/Ca(OH)2 reaction couple
Get PDFSolarPaces 201
La regencia de Mª Cristina de Borbón (1833-1840): un avance significativo en el reconocimiento de los derechos de autor en el siglo XIX
Get PDFThe process of recognition of intellectual property rights in Spain starts from the first decades of the nineteenth century influenced by the liberal ideology thatpromotes a new economic and social model based on private property and the economic use of it. As the building of the liberal state progresses, more rights and faculties will be recognized to authors of literary and artistic works. Political changes experienced after the death of Fernando VII shall encourage the enactment of a series of rules during the regency of Maria Cristina de Borbon which will be an important advance in the recognition of such rights to authors, and will be the direct antecedent of the first Literary Property Law promulgated on June 10, 1847.El proceso de reconocimiento de la propiedad intelectual en España comienza desde las primeras décadas del siglo XIX influido por la corriente ideológica liberal que promueve un nuevo modelo económico y social basado en la propiedad privada y en el aprovechamiento económico de la misma. A medida que se avance en la construcción ese Estado liberal se irán reconociendo mayores derechos y facultades a los autores de obras literarias y artísticas. Los cambios políticos vividos tras la muerte de Fernando VII propiciarán la promulgación de una serie de normas durante la regencia de Ma Cristina de Borbón que avanzarán en el reconocimiento de esta clase de derechos a los autores y que serán el antecedente directo de la primera Ley de Propiedad Literaria de 10 de junio de 1847
An Easy Phylogenetically Informative Method to Trace the Globally Invasive Potamopyrgus Mud Snail from River’s eDNA
Get PDFPotamopyrgus antipodarum (New Zealand mud snail) is a prosobranch mollusk native to
New Zealand with a wide invasive distribution range. Its non-indigenous populations are
reported from Australia, Asia, Europe and North America. Being an extremely tolerant species,
Potamopyrgus is capable to survive in a great range of salinity and temperature conditions,
which explains its high invasiveness and successful spread outside the native range.
Here we report the first finding of Potamopyrgus antipodarum in a basin of the Cantabrian
corridor in North Iberia (Bay of Biscay, Spain). Two haplotypes already described in Europe
were found in different sectors of River Nora (Nalon basin), suggesting the secondary introductions
from earlier established invasive populations. To enhance the surveillance of the
species and tracking its further spread in the region, we developed a specific set of primers
for the genus Potamopyrgus that amplify a fragment of 16S rDNA. The sequences obtained
from PCR on DNA extracted from tissue and water samples (environmental DNA, eDNA)
were identical in each location, suggesting clonal reproduction of the introduced individuals.
Multiple introduction events from different source populations were inferred from our
sequence data. The eDNA tool developed here can serve for tracing New Zealand mud
snail populations outside its native range, and for inventorying mud snail population assemblages
in the native settings if high throughput sequencing methodologies are employed
Complex Impedance Transformers Based on Branch-Line Hybrid Couplers
Get PDFA topology, equations and design methodology for complex impedance-transforming
branch-line hybrid couplers are presented. This method also allows the realization of real impedancetransforming
to higher impedances. Limitations for real, imaginary and complex impedances are
discussed. Test results are shown for a 3 dB 50 to 450 Ω hybrid coupler, at a 2 GHz center frequency,
with a 21% bandwidth, an amplitude balance of 4.35 ± 1 dB and a phase balance of 92.16◦ ± 8.8◦.
To showcase the complex impedance scenario, two 3 dB 50 Ω to 70 − 200j Ω are measured at a 2 GHz
center frequency. One of these couplers uses a technique for reducing the chip size, yielding a 22.5%
bandwidth, 4 ± 0.9 dB amplitude balance and 93.22◦ ± 6.74◦ phase balance, while accomplishing a 25%
size reduction