Venta de hijos : novela española

Copia digital : Diputación de Málaga. Biblioteca Canovas del Castillo, 201

Influencia de la irradiación en la calidad nutritiva del trigo y la merluza

Se estudia el efecto de la irradiación y tiempo de conservación sobre el valor nutritivo del trigo. La dosis de irradiación fue de 37,5 Krad. El tiempo transcurrido desde la fecha de recolección hasta ser sometido a irradiación fue de 150 días, y desde esta fecha hasta ser consumido por los animales pasaron 90 días. La determinación analítica química, se ha realizado a los 605 días de la recolección. Las técnicas seguidas para la valoración de la proteína han sido: una biológica, la de Thomas Mitchell, y otra analítica química, el aminograma, según la técnica de Moore-Stein. Para la determinación de hidratos de carbono disponibles se ha utilizado la técnica de Friedemann y col. De acuerdo con los resultados obtenidos, llegamos a la conclusión de que desde el punto de vista nutritivo, la irradiación es un método adecuado de conservación de trigo, ya que no influye la calidad del mismo, juzgada por la disponibilidad de los hidratos de carbono y por la digestibilidad de la proteína. Por otra parte la irradiación disminuye pérdidas en aminoácidos durante el almacenamiento. Hemos estudiado también la influencia de la irradiación sobre el valor nutritivo de filetes de merluza (Merlucius merlucius). La dosis de irradiación fue de 100 Krad.; la experiencia biológica se realizó según la técnica ya citada de Thomas-Mitchell. Concluímos que la irradiación no influye significativamente sobre la digestibilidad ni la calidad nutritiva de la proteína de merluza.We have studied the effect of the irradiation and the time of conservation on nutritional value. The irradiation dose was of 37,5 Krad.; the time past from the date of harvest untill the irradiation was 150 days and from this date untill that was given to the animals past 90 days. The ana tic al determination was realized to 605 days after harvest. The Thomas Mitchell technique has been used in estimating its protein quality and that of Moore-Stein in determining the aminogram. The Friedeman and col., technique for the carbohidrates usable. According to results obtained we came to the conclusion that, from a nutritional point of view, irradiation is a suitable method for the preservation of wheat, because don't affect the quality of its self judged for the carbohydrates availability and for the protein digestibility. Furthermore, irradiation diminishes the loss of aminoacids during storage. Moreover, we have studied the influence of the irradiation on nutritional value of hake fillet (Merlucius merlucius). The irradiation dose was lOO. Krad.; the irradiation has no significant effects on the digestibility, neither the nutritive quality of have protein

Caracterización física y química de ríos de montaña (Tafí del Valle-Tucumán-Argentina)

En este trabajo se estudió durante el ciclo anual 2000-2001, a los ríos Blanquito, Churqui, de La Ovejería, de Las Carreras, Tafí, El Mollar y Los Sosa, ubicados a 2000 msnm en el valle de Tafí (Tucumán-Argentina). El objetivo de esta contribución fue caracterizar e interpretar las variaciones espacio-temporales de los parámetros físicos y químicos en relación con la dinámica hidrológica a la que se encuentran sujetos estos ecosistemas acuáticos y además, comparar la calidad de sus aguas. Las variables físicas y químicas analizadas fueron: oxígeno disuelto (OD), demanda bioquímica de oxígeno (DBO5), iones mayoritarios, compuestos nitrogenados, ortofosfatos y metales pesados. Los resultados muestran que la temperatura varió entre 4.2 y 28 ◦C, el pH fluctuó de neutro a alcalino (6.7-8.7) y la conductividad eléctrica entre 64 y 296 μS/cm. El OD y la DBO5 se mostraron estables, alcanzando máximos valores de 10.1 y 2 mg/l, respectivamente. El agua pudo caracterizarse como bicarbonatada-cálcica dominante. Las concentraciones de N-NO−3 oscilaron entre 0.1 y 0.6 mg/l, el N-NO−2 sólo llegó en el río Churqui a 0.01 mg/l y el N-NH+4 alcanzó valores de 0.8 mg/l. En general los registros de los ortofosfatos fueron inferiores a 0.2 mg/l. Los metales pesados Cu2+ y Fe3+ llegaron a un máximo de 3 mg/l y 1.8 mg/l, respectivamente. Las mayores concentraciones del hierro se presentaron en el río de La Ovejería y de cobre en el río El Mollar, probablemente por contaminación antropogénica. La interpretación de los análisis de componentes principales realizados sobre la matriz de parámetros físicos y químicos, permitió diferenciar a los sistemas lóticos temporal y espacialmente. El componente 1 ordenó a los ríos de acuerdo a los iones mayoritarios predominantes y a la conductividad, lo que podría interpretarse como un eje de mineralización. Los componentes 2 y 3, ordenaron las muestras de invierno y primavera y las de verano y otoño, de acuerdo a la variación cíclica estacional coincidiendo con las condiciones climáticas del área de estudio.In this work, throughout the 2000-2001 annual period, the Blanquito, Churqui, de La Ovejería, de Las Carreras, Tafí, El Mollar and Los Sosa rivers, located at 2000 m above sea level in the Taf'ı Valley (Tucumán-Argentina) were studied. The aim of this paper was not only to characterize and understand the spatial and temporal variations of physical and chemical parameters related to the hydrological dynamics these aquatic ecosystems are subject to, but also to compare the quality of their waters. Physical and chemical variables analysed were: dissolved oxygen (DO), biochemical oxygen demand (BOD5), preponderant ions, nitrogenous compounds, orthophosphates, and heavy metals. Results show that the temperature ranged between 4.2 and 28 ◦C, pH fluctuated from neutral to alkaline (6.7-8.7) and electrical conductivity varied between 64 and 296 μS/cm. DO and BOD5 were stable and reached maximum values of 10.1 and 2 mg/l, respectively. The water could be characterized as mainly bicarbonated-calcic. N-NO−3 concentrations ranged between 0.1 and 0.6 mg/l, N-NO−2 reaching only 0.01 mg/l in the Churqui river, and N-NH+4 reached values of 0.8 mg/l. In general, orthophosphate records were lower than 0.2 mg/l. Maximum values for heavy metals, Cu2 + and Fe3 + were 3 mg/l y 1.8 mg/l, respectively. Iron highest concentrations were found in de La Ovejería river, whereas those for copper were found in El Mollar river, probably due to anthropogenic pollution. The interpretation of the main component analyses carried out on the physical and chemical parameters matrix, allowed to differentiate lotic systems both temporally and spatially. Component 1 ordered the rivers according to both the prevailing ions and conductivity, which could be interpreted as a mineralization axis. Components 2 and 3 ordered the winter and spring, and the summer and autumn samples according to the seasonal cyclic variation, coinciding with the climatic conditions of the area under study

Procesadores de bajo coste y su aplicación en la docencia de Ingeniería de Computadores

La Informática evoluciona a gran velocidad y es necesario actualizar con frecuencia los recursos de aprendizaje para mantener el interés de los estudiantes. En la actualidad, hay una gran diversidad de plataformas de cómputo de bajo coste que son utilizadas como recursos en los estudios de Informática. Raspberry Pi y algunos modelos de Arduino (como Arduino Due), ambas basadas en procesadores ARM, son ejemplos representativos de este tipo de plataformas. Las arquitecturas ARM son ejemplos de procesadores RISC que actualmente gozan de gran popularidad por su buena relación entre potencia computacional, consumo y coste. De hecho, constituyen el núcleo de muchos de los teléfonos móviles y sistemas empotrados actuales. Al estar tan cerca de los estudiantes, el uso de este tipo de recursos en el aula representa una oportunidad para: (1) motivar a los alumnos de Bachillerato y Educación Secundaria para estudiar el Grado de Informática y (2) potenciar el interés de los alumnos de Grado de Informática por la Ingeniería de Computadores. Existe una serie de eventos consolidados que tienen una gran difusión social. En ellos, se muestran vistosos ejemplos de aplicación y funcionamiento de este tipo de plataformas. En este trabajo se describen el conjunto de sistemas interactivos y basados en plataformas computacionales de bajo coste que se han desarrollado para ser utilizadas en este tipo de eventos. De acuerdo con nuestra experiencia de participación, creemos que están sirviendo para despertar el interés del alumno de secundaria por la Informática en general, y más específicamente por la Ingeniería de Computadores. Por otra parte, un porcentaje de los alumnos que cursan el Grado de Ingeniería Informática no está interesado en el análisis de los componentes hardware y de su organización para construir un computador moderno. Piensan que la asignatura de Arquitectura de Computadores del Grado en Ingeniería Informática está lejos de su futura actividad profesional. En este contexto, nos planteamos seleccionar ARM como arquitectura de referencia para desarrollar los contenidos de la asignatura de Arquitectura de Computadores. Creemos que esta decisión mejora el interés del alumno por dos motivos: (1) el objeto de estudio se usa en multitud de plataformas muy cotidianas para el alumno y (2) es posible diseñar las actividades prácticas de las asignaturas basadas en elementos reales y no únicamente virtuales. Este trabajo muestra las distintas actividades tanto a nivel teórico como práctico que se plantean al alumno en el marco de la asignatura Arquitectura de Computadores.Computer Science is advancing rapidly and it is necessary to keep the educational resources up to date in order to keep the interest of students. Nowadays, there is a wide variety of low-cost computing platforms that are used as educational resources in the Computer Science degree. Raspberry Pi and some models of Arduino (such as Arduino Due), which are both based on ARM processors, are representative examples of this kind of platforms. ARM architectures are instances of RISC processors which nowadays have reached an important popularity due to their good relation between performance, consumption and cost. In fact, they constitute the core of numerous current mobile phones and embedded systems. Considering their proximity to the students, the use of this kind of resources in the classroom is an opportunity to: (1) encourage the high schools pupils to study the Computer Science degree and (2) to increase the interest of the students for the Computer Engineering. There are several consolidated informational events of great social outreach in which different examples of application of this kind of platforms are shown. In this work, the set of interactive systems designed to be used in this kind of events is described. According to our experience, we think that they arouse the interest of high schools pupils for the Computer Science in general, and, more specifically, for the Computer Engineering. Furthermore, a percentage of the students of the Computer Science degree is not interested in the analysis of hardware components and the architecture of modern computers. They think that the subject of Computer Architecture of the Computer Science Degree is far from his/her future career. In this context, we will select ARM as a reference architecture where the contents of the subject Computer Architecture will be developed on. We think this might improve the motivation of the students mainly for two reasons: (1) the object of study is being used in a lot of modern platforms; and (2) it is possible to design the practical activities of the subjects using real platforms and not only virtual ones. This work shows the activities proposed to the students in the context of the subject Computer Architecture, considering both practical and theoretical approaches

Efficient generation of highly crystalline carbon quantum dots via electrooxidation of ethanol for rapid photodegradation of organic dyes

Achieving versatile routes to generate crystalline carbon-based nanostructures has become a fervent pursuit in photocatalysis-related fields. We demonstrate that the direct electrooxidation of ethanol, performed on Ni foam, yields ultra-small and highly crystalline graphene-like structures named carbon quantum dots (CQDs). We perform simulations of various sp2 and sp3 domains in order to understand the optical properties of CQDs by accounting their contribution as absorbance/luminescent centers in the overall optical response. Experiments and simulations reveal that absorbance bands for as-synthesized CQDs are dominated by small sp2 domains comprised of r7 aromatic-rings. After 48 h synthesis, the dispersion transition from yellow to red, exhibiting new and red shifted absorbance bands. Furthermore, fluorescence emission is governed by medium-sized sp 2 domains (with aromatic ring counts r12) and oxygen-containing groups. These oxygen-rich groups within the CQDs, confirmed by FT-IR and XPS, are responsible for the fast photodegradation of organic dyes, with B90% of methylene blue (MB) being degraded within the first 5 min of light exposure. Our work provides crucial insights about the electrochemical synthesis and overall optical properties of carbon nanostructures, while being effective and reliable toward the degradation of contaminants in water

Ferroelectric photovoltaic properties in doubly substituted (Bi0.9La0.1)(Fe0.97Ta0.03)O3 thin films

This work was supported by the DOE-EPSCoR Grant No. DE-FG02-08ER46526. Acknowledgment is also due to NSF Grant No. #1002410 for providing fellowships to R.K.K., D.B., and J.S.Y.Doubly substituted [Bi0.9La0.1][Fe0.97Ta0.03]O3 (BLFTO) films were fabricated on Pt/TiO2/SiO2/Si substrates by pulsed laser deposition. The ferroelectric photovoltaic properties of ZnO:Al/BLFTO/Pt thin film capacitor structures were evaluated under white light illumination. The open circuit voltage and short circuit current density were observed to be ∼0.20 V and ∼1.35 mA/cm2, respectively. The band gap of the films was determined to be ∼2.66 eV, slightly less than that of pure BiFeO3 (2.67 eV). The PVproperties of BLFTO thin films were also studied for various pairs of planar electrodes in different directions in polycrystalline thin films.Publisher PDFPeer reviewe

Unipolar resistive switching in planar Pt/BiFeO3/Pt structure

This work was supported by the NASA EPSCoR Grant # NNX13AB22A. Financial support to various researchers from IFN-NSF grant # EPS 1002410 (RSK, DB, YS and BRW) is gratefully acknowledged. S. K. is thankful to UGC, India for a Raman fellowship under Indo-US 21st century knowledge initiatives (No:5-53/2013(I.C)).We report unipolar resistive switching suitable for nonvolatile memory applications in polycrystalline BiFeO3 thin films in planar electrode configuration with non-overlapping Set and Reset voltages, On/Off resistance ratio of similar to 10(4) and good data retention (verified for up to 3,000 s). We have also observed photovoltaic response in both high and low resistance states, where the photocurrent density was about three orders of magnitude higher in the low resistance state as compared to the high resistance state at an illumination power density of similar to 100 mW/cm(2). Resistive switching mechanisms in both resistance states of the planar device can be explained by using the conduction filament (thermo-chemical) model. (C) 2015 Author(s).Publisher PDFPeer reviewe

Gene expression of growth factor BMP15, GDF9, FGF2 and their receptors in bovine follicular cells

Introduction. Growth and follicular maturation involve transformations of various components of the follicle, such as the oocyte, granulosa and techa cells. Several growth factors, including differentiation growth factor 9 (GDF9), bone morphogenic protein 15 (BMP15) and basic fibroblast growth factor (FGF2) are important for follicular development and oocyte maturation, by its ability to increase the proliferation of granulosa, techa cells and the ovarian stroma. Objetive. Evaluate mRNA expression of GDF9, BMP15, FGF2 and their main receptors, transforming growth factor beta receptor 1 (TGFβ-R1), bone morphogenetic protein receptor, type IB (BMPR-IB) and fibroblast growth factor receptor 2 (FGFR2) in bovine follicular cells. Materials and methods. Total RNA was isolated from pooled samples of oocytes (OOs), cumulus cells (CCs) of cumulus oocyte complexes (COCs) and follicular cell pellets (PCs) of 70 ovaries obtained from 96 beef heifers, collected at a local abattoir. The expression pattern of growth factors and their receptors in follicular bovine cells was evaluated by reverse transcriptase polymerase chain reaction (RT-PCR). Results. The mRNA transcripts encoding GDF9, BMP15, FGF2, TGFβ-R1, BMPR-IB and FGFR2 genes were detected, by RT-PCR, in all studied cells. This is the first time that the expression of TGFβ-R1 and BMPR-IB receptors is reported in bovine oocytes. Conclusions. The presence of growth factors and receptor transcripts in the studied cells indicate that these factors could act as paracrine and autocrine regulators of folliculogenesis

Plan estratégico de sistemas de información: municipio electrónico

En los últimos años, ha aumentado la necesidad de implementar proyectos que acerquen al ciudadano con el Estado, de modo que este último provea servicios de mayor calidad basados en alta tecnología. Se revela en todos los sectores de la sociedad (público, privado, civil, académica) la necesidad de usar y optimizar las oportunidades que presentan las Tecnologías de la Información y Comunicación (TIC) para mejorar la gobernabilidad, para implementar nuevos canales de comunicación entre gobiernos y ciudadanos, para tejer y reforzar redes comunitarias, para asegurar la transparencia gubernamental, para ingresar en forma proactiva a la Sociedad de la Información y para no quedar al margen de la nueva economía. Se necesitan formas innovadoras de interacción entre los ciudadanos y los gobernantes locales, nuevas concepciones de la política local, utilizando medios electrónicos.In the last years, it has increased the necessity to implement projects that approach the citizen with the State, so that the later provides services of greater quality based on high technology. In all sectors of society (public and private sectors, civil and academic society) there is a need to use and to optimize the opportunities presented by Information and Communication Technologies (ICT), to improve governability, to implement new communication channels between governments and citizens, to weave and to reinforce communitarian networks, to assure the governmental transparency, to enter in proactive form the Information Society and not to have left. Innovating forms are needed interaction between the local citizens and governors, new conceptions of the local policy, using electronic devices.III Workshop de Ingeniería de Software y Bases de Datos (WISBD)Red de Universidades con Carreras en Informática (RedUNCI