Arenas J.M.,University Complutense Of Madridmadrid |
Lazaro-Lobo A.,University Complutense Of Madridmadrid |
Mola I.,Obrascon Huarte Lain S.A. |
Escudero A.,Rey Juan Carlos University |
Casado M.A.,University Complutense Of Madridmadrid
Ecological Engineering | Year: 2017
Many studies have shown evidence of very rapid natural colonization of trees on roadslopes. Tree colonization on roadslopes can be a useful tool in the ecological restoration of these degraded areas. However, little is known about the characteristics of the tree species capable of colonizing these novel habitats. Moreover, it is necessary to know how tree species respond to the two main limitations in these areas: microsite availability (i.e., roadslope characteristics) and seed arrival, which is related to propagule source, dispersion vector and landscape characteristics. The present study aims to investigate the natural colonization of tree species on roadslopes, as well as the factors determining their occurrence. We identified all tree individuals on 150 roadslopes, along 51 km of a motorway. A total of 1143 individuals belonging to 18 species was recorded. Most individuals found resulted from a natural colonization process, although we found various fruit trees (present in 7 roadslopes) and Robinia pseudoacacia (2 roadslopes), which are probably associated with unintentional human-mediated seed dispersal. Only the six most abundant species were analysed in detail: Populus nigra, Quercus ilex, Quercus pyrenaica, Fraxinus angustifolia, Salix spp. and Ulmus pumila. Each roadslope was characterized both by site variables and by surrounding variables. We analysed the effect of the descriptive variables on the occurrence and density of each species on the roadslopes, and we subsequently used decision trees (classification and regression trees) to analyse the combined effect of the different predictors considered. Our results show successful tree colonization on the roadslopes, although they appear to indicate limitations to colonization associated with the availability of propagules. Furthermore, tree species dispersed by animals required a continuous flow of seeds favoured by an appropriate community of seed dispersers and a suitable landscape structure. By contrast, wind-dispersed tree species basically need favourable site characteristics on the roadslopes. © 2017 Elsevier B.V.
Campuzano S.,University Complutense Of Madridmadrid |
Yanez-Sedeno P.,University Complutense Of Madridmadrid |
Pingarron J.M.,University Complutense Of Madridmadrid
Electrochimica Acta | Year: 2017
MicroRNAs (miRNAs) are considered reliable molecular biomarkers being definitively linked to the development of relevant diseases including cardiovascular, diabetes, tissue injury and cancer. Therefore, accurate and sensitive quantification of miRNAs may result in correct disease diagnosis establishing these small noncoding RNA transcripts as valuable biomarkers. Electrochemical biosensing approaches appeared in the last 5 years for miRNAs determination based on the use of bioreceptors with affinity for RNA duplexes (viral proteins and antibodies) are ideal choices to overcome some limitations of conventional quantification strategies. In this review some of the main aspects of the interest in miRNA determination, disadvantages of conventional methodologies and unique features offered by the use of this type of versatile bioreceptors coupled to electrochemical transduction are discussed. The relevant characteristics of the reported approaches are critically commented and the research opportunities and future development trends outlined. © 2017 Elsevier Ltd
PubMed | Complutense University of Madrid, University Complutense Of Madridmadrid, Autonomous University of Madrid, Camilo José Cela University and 2 more.
Type: | Journal: Frontiers in neuroscience | Year: 2016
Mild cognitive impairment (MCI) is considered a transitional stage between healthy aging and dementia, specifically Alzheimers disease (AD). The most common cognitive impairment of MCI includes episodic memory loss and difficulties in working memory (WM). Interference can deplete WM, and an optimal WM performance requires an effective control of attentional resources between the memoranda and the incoming stimuli. Difficulties in handling interference lead to forgetting. However, the interplay between interference and WM in MCI is not well-understood and needs further investigation. The current study investigated the effect of interference during a WM task in 20 MCIs and 20 healthy elder volunteers. Participants performed a delayed match-to-sample paradigm which consisted in two interference conditions, distraction and interruption, and one control condition without any interference. Results evidenced a disproportionate impact of interference on the WM performance of MCIs, mainly in the presence of interruption. These findings demonstrate that interference, and more precisely interruption, is an important proxy for memory-related deficits in MCI. Thus, the current findings reveal novel evidence regarding the causes of WM forgetting in MCI patients, associated with difficulties in the mechanisms of attentional control.
Long-Term Effects of Prenatal Exposure to Undernutrition on Cannabinoid Receptor-Related Behaviors: Sex and Tissue-Specific Alterations in the mRNA Expression of Cannabinoid Receptors and Lipid Metabolic Regulators
PubMed | Complutense University of Madrid, University of Malaga, University Institute of Mental Health and University Complutense Of Madridmadrid
Type: | Journal: Frontiers in behavioral neuroscience | Year: 2017
Maternal malnutrition causes long-lasting alterations in feeding behavior and energy homeostasis in offspring. It is still unknown whether both, the endocannabinoid (eCB) machinery and the lipid metabolism are implicated in long-term adaptive responses to fetal reprogramming caused by maternal undernutrition. We investigated the long-term effects of maternal exposure to a 20% standard diet restriction during preconceptional and gestational periods on the metabolically-relevant tissues hypothalamus, liver, and perirenal fat (PAT) of male and female offspring at adulthood. The adult male offspring from calorie-restricted dams (RC males) exhibited a differential response to the CB1 antagonist AM251 in a chocolate preference test as well as increased body weight, perirenal adiposity, and plasma levels of triglycerides, LDL, VLDL, bilirubin, and leptin. The gene expression of the cannabinoid receptors
Elkouss D.,University Complutense Of Madridmadrid |
Elkouss D.,Technical University of Delft |
Strelchuk S.,University of Cambridge
Physical Review Letters | Year: 2015
The quantum capacity of a quantum channel is always smaller than the capacity of the channel for private communication. Both quantities are given by the infinite regularization of the coherent and the private information, respectively, which makes their evaluation very difficult. Here, we construct a family of channels for which the private and coherent information can remain strictly superadditive for unbounded number of uses, thus demonstrating that the regularization is necessary. We prove this by showing that the coherent information is strictly larger than the private information of a smaller number of uses of the channel. This implies that even though the quantum capacity is upper bounded by the private capacity, the nonregularized quantities can be interleaved. © 2015 American Physical Society.
Molina M.C.,Rey Juan Carlos University |
Divakar P.K.,University Complutense Of Madridmadrid |
Gonzalez N.,Rey Juan Carlos University
Mycoscience | Year: 2015
The aim of this study was to evaluate the optimum conditions for culturing Anaptychia ciliaris mycobionts in vitro and analyzing their ontogenetic development while in culture. After the testing of two germination and four development media, results of germination and growth were evaluated. We here recommend the use of basal medium without additional carbon source for germination process. Mycobiont growth was possible in all organic media tested. The maximum mycobiont growth was observed in Lilly and Barnet medium enriched with 3% glucose. © 2014 The Mycological Society of Japan. Published by Elsevier B.V. All rights reserved.
Gomez-Herrero A.,University Complutense Of Madridmadrid |
Landa-Canovas A.R.,CSIC - Institute of Materials Science |
Otero-Diaz L.C.,University Complutense Of Madridmadrid
Journal of Solid State Chemistry | Year: 2015
Abstract In the Sb-Nb-S system four new misfit layer phases have been found and carefully investigated via Transmission Electron Microscopy (TEM). Their structures are of composite modulated structure type with stoichiometries that can be formulated as (SbS)1+δ(NbS2)n; for n=1, δ~1.14 and 1.19; for n=2, δ~1.18 and for n=3, δ~1.19. Selected Area Electron Diffraction (SAED) patterns show an almost commensurate fit between the pseudo-tetragonal (SbS) and the pseudo-orthohexagonal (NbS2)n subcells along the misfit direction a, with 3(SbS)≈5(NbS2), being b the same for both sub-lattices and c the stacking direction. For n=1, a commensurate phase with 4aSbS=7aNbS2 has also been observed. In addition to the characteristic misfit and associated modulation of the two sub-structures, a second modulation is also present which appears to be primarily associated with the (SbS) sub-structure of both the n=1 and n=2 phases. High Resolution Transmission Electron Microscopy (HRTEM) images show ordered stacking sequences between the (SbS) and (NbS2)n lamellae for each of the four phases, however, disordered intergrowths were also occasionally found. Most of the crystals showed different kinds of twinning defects on quite a fine scale. Many crystals showed curled up edges. In some cases the lamellar crystals were entirely folded giving rise to similar diffraction patterns as found for cylindrical crystals. © 2015 Published by Elsevier Inc.
Insuasty A.,University Complutense Of Madridmadrid |
Atienza C.,University Complutense Of Madridmadrid |
Lopez J.L.,University Complutense Of Madridmadrid |
Martin N.,University Complutense Of Madridmadrid |
Martin N.,IMDEA Madrid Institute for Advanced Studies
Chemical Communications | Year: 2015
The supramolecular organization of new fullerene derivatives endowed with peptides as biomolecular templates affords ordered nanofibers of several micrometres length based on hydrogen bonds and π-π interactions. This journal is © The Royal Society of Chemistry.
Haigh-Florez D.,University Complutense Of Madridmadrid |
Cano-Raya C.,University Complutense Of Madridmadrid |
Bedoya M.,University Complutense Of Madridmadrid |
Orellana G.,University Complutense Of Madridmadrid
Sensors and Actuators, B: Chemical | Year: 2015
Abstract An original CO2 analyser has been developed using just a phase-sensitive luminescent O2 sensor as transducer. The goal of this work is to provide a robust sensor for continuous monitoring of microalgae cultures in solar reactors for biomass production. At the pH of the culture medium (8-9), the microorganism carbon source is largely present as HCO3-. Acidification of the sample near the sensor head converts it into CO2. The automatic analyser is based on the physical competition between the two gases for the head space of the measuring chamber of a specially designed flow cell. A second chamber is used to determine the O2 background level. Measurements with the dual-head CO2 sensor were validated with a reference method and demonstrated to be statistically significant (t = 1.61 for 8 degrees of freedom and t = 2.02 for 8 degrees of freedom, for NaHCO3 and sample solutions, respectively). The optosensor displays a dynamic range of 20-200 mM HCO3-, suitable (and tuneable) for the application sought, with adequate response and recovery times (t90 and t-90 of 11 and 18 min, respectively, for a 0 to 60 mM HCO3- step change). The CO2 analyser has been tested with microalgae cultures both in the laboratory and in field pilot measurements. © 2015 Elsevier B.V.
Aleja D.,Charles III University of Madrid |
Lopez-Gomez J.,University Complutense Of Madridmadrid
Advanced Nonlinear Studies | Year: 2015
In this paper we characterize the dynamics of a generalized version of the model of Belgacem and Cosner  within the range of values of the parameters where the trivial steady state is unstable and the problem cannot admit a positive steady state. In such regimes, the dynamics is governed by the metasolutions.