The aquatic biota of the now extinct lacustrine complex of the Mexico basin

The commonest organisms of the original Mexico lake complex are listed, including those that exist today in the Lago Viejo. In addition, a brief hydraulic history of this endorheic basin is given

Nosotros: la no investigación en arquitectura

Amann, Atxu; 'La no investigación' en Actas de III Jornadas sobre investigación en Arquitectura y Urbanismo, pp.0-6, Madrid: Escuela Técnica Superior de Arquitectura de Madrid, 2009. ISBN: 84-9728-309-0. Congreso entre los días 17-19/06/200

"Juego" e innovacion educativa

En esta aportación se reflejan una serie de experiencias docentes que el Grupo de Investigación ‘Hypermedia. Taller de configuración arquitectónica’, reconocido también como grupo de innovación educativa de la Universidad Politécnica de Madrid ha llevado a cabo en el ámbito de diversos proyectos de innovación educativa basados en el ‘juego’. Dentro del Plan de Estudios para el título de arquitecto, tanto en las asignaturas troncales de primer curso, como en los talleres experimentales interdepartamentales y en las asignaturas de libre elección -una específicamente de diseño de juguetes sostenibles y otra sobre género-, además de en los cursos intensivos para universitarios europeos (Athens) y por último, en las materias de intensificación de los últimos cursos e incluso en los cursos de posgrado -master y doctorado- hemos introducido experiencias pedagógicas que implican el jugar como pedagogía basada en la acción que provoca una reflexión sobre lo arquitectónico, sobre el mundo y sobre nosotros mismos. Someramente se describen aquí algunas de estas acciones, la metodología, los objetivos y los resultados obtenido

Citizens Interactive Behaviour in the Performance of the Urban Space of Cohabitacion. Interactive Atlas of Urban Habitability

The article shows a range of contemporary phenomena linked with urban space and the increasing citizens? interactivity in the network. The sources for theory and reflection are related to the ongoing research project ?Interactive Atlas of urban habitability" which is based on citizen participation in the sensitive description of the urban environment. It addresses a classification of variables related to the desires of urban habitability

Drug Nanoparticle Stability Assessment Using Isothermal and Nonisothermal Approaches

Many drugs are administered in the form of liquid-dispersed nanoparticles. Frequently, one of the overlooked aspects in the development of this drug delivery system is the loss of efficacy and the degradation of the carried drugs. Estimating the shelf life of drug products implies the storage of samples under controlled conditions of temperature and humidity for different periods, ranging from months to years, delaying decisions during development, manufacturing, and commercialization. Adapting well-known isothermal and nonisothermal methods to nanoparticles would allow correlating kinetic parameters obtained in a single mathematical model and predicting the shelf life faster than traditional methods. Unlike the traditional approaches, the isoconversional method (i) considers drug products as heterogeneous systems, without a unique kinetic order, (ii) establishes a maximum percentage of degradation, (iii) assumes the same kinetics for all processes regardless of the conditions, and (iv) includes the influence of humidity by a modification of Arrhenius equation. This method serves in calculating the kinetic parameters and shelf life derived from them, in a few weeks. In the same way, nonisothermal treatments allow obtaining these parameters by differential scanning calorimetry. Samples are subjected to different heating rates to establish the temperature at which the thermal decomposition event occurs and, thus, to calculate in a few days the activation energy and the preexponential factor using the Kissinger method. But this approach has limitations: the isoconversional method does not consider crystalline state of the sample, while nonisothermal method ignores the effect of the storage conditions. Processing nanoparticles for isothermal and nonisothermal treatments would allow accurate and fast prediction of the drug-loaded nanoparticle shelf life correlating parameters obtained using a single mathematical model. The accuracy of the prediction would be assessed by comparison of estimated shelf life versus data coming from traditional stability studies

Diatom diversity and distribution in neotropical karst lakes under anthropogenic stress

Lake degradation is an important environmental problem worldwide, particularly in the neotropics where rapid population growth is leading to increasing human impact. However, baseline studies in neotropical lakes are still missing. This study focussed on hydrochemistry, trophic status and in-depth analysis of diatom diversity and ecological distribution in neotropical karst lakes, presenting a high-resolution paleolimnological reconstruction of changing hydrochemical and trophic characteristics in since the late 1950s. We studied sixteen freshwater lakes dominated by bicarbonates, calcium, and magnesium of which four had higher salinity (300–500 mg L-1), sulphate proportions, turbidity and eutrophic conditions. These lakes are considered impacted ecosystem that receive soil-derived sediment, organic matter, urban and agricultural effluents through river inflow. The βw diversity was low (2.6), driven mostly by the hydrochemical and trophic status differences between the four impacted lakes and the rest. Two taxa were characteristic of higher salinity, eutrophic lakes (Aulacoseira granulata var. angustissima and Stephanocyclus meneghinianus) and eight were preferentially present in the low-salinity oligo-mesotrophic lakes. Three of the diatom taxa (Discostella stelligera, A. granulata var. angustissima S. meneghinianus) are cosmopolitan species also present in non-karstic lakes in central Mexico with comparable salinity distributions. Contrastingly, four have restricted neotropical karst distributions (Cyclotella petenensis, Discostella sp, Mastogloia calcarea and Planothidium sp.), in danger of local extirpation as hydrochemical changes and eutrophication increase. C. petenensis described from the Peten Itza record, was present with high abundances in oligo-mesotrophic lakes of low salinity. Paleolimnological analysis allowed to identify that increasing erosion was associated with the first appearance and gradual increase of the diatom taxa characteristic of the impacted lakes since the 1980s, until reaching a critical transition in 2006, demonstrating that currently impacted lakes previously had lower salinity and trophic conditions, comparable with the currently non-impacted lakes

Presbyopia: An outstanding and global opportunity for early detection of pre-frailty and frailty states

Depto. de Optometría y VisiónUnidad Docente de Inmunología, Oftalmología y ORLFac. de Óptica y OptometríaTRUEEuropean Union's Horizon 2020 programmeUniversidad Complutense de Madrid (España)Banco Santander (España)pu

Producción Package "1000 Maneras de matar a Adri"

Proyecto del package de producción del cortometraje 1000 maneras de matar a Adri.Correcher Alcocer, A.; Pastor Segura, J. (2012). Producción Package "1000 Maneras de matar a Adri". Universitat Politècnica de València. http://hdl.handle.net/10251/18101Archivo delegad

Planktonic bloom-forming Nodularia in the saline Lake Alchichica, Mexico

Lake Alchichica displays a characteristic cyanobacterial bloom associated with the onset of the stratification period. It mostly consists of the nitrogen-fixing cyanobacterium Nodularia spumigena. Filaments of Nodularia were straight, usually with an evident colorless, transparent sheath, with gas vesicles and without akinetes. The bloom developed in waters with a conductivity of 13.47 to 14.14 mS/cm. Water column temperature was between 14.1 and 21.2 C, the pH fluctuated between 8.8 and 10.0 and dissolved oxygen between 0 and 9.3 mg/l. The annual mean concentration of N-NO3 was highest in 2001 and lowest in 2000. For P-PO4 the highest mean value was measured in 2002 with the lowest value in 1999. We monitored the bloom throughout four annual cycles. The intensity of growth and extent of the presence of N. spumigena in Lake Alchichica differed among the years. The highest mean density was observed in 2001, while the lowest values were found in 2000. N. spumigena is found regularly during a three-month period, but peak concentrations are reached only for a few weeks. In calm weather and following solar heating, the Nodularia filaments floated to the lake surface, causing the bloom to become apparent. The intensity of growth was correlated with the annual concentrations of N-NO3, indicating the role of the cyanobacteria as a source of new nitrogen to the lake

Dry Eye Disease and Refractive Corrections

Depto. de Optometría y VisiónFac. de Óptica y OptometríaTRUEpu