487 research outputs found
Tres posibles casos de lepra en la Plaza del Castillo (Pamplona, Navarra)
X Congreso Nacional de Paleopatología. Univesidad Autónoma de Madrid, septiembre de 200
Influence of operating parameters on the biodegradation of steroid estrogens and nonylphenolic compounds during biological wastewater treatment processes
This document is the unedited author's version of a Submitted Work that was subsequently accepted for
publication in Environmental Science & Technology, copyright © American Chemical Society after peer
review. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/es901612v.This study investigated operational factors influencing the removal of steroid estrogens and nonylphenolic compounds in two sewage treatment works, one a nitrifying/denitrifying activated sludge plant and the other a nitrifying/denitrifying activated sludge plant with phosphorus removal. Removal efficiencies of >90% for steroid estrogens and for longer chain nonylphenol ethoxylates (NP4−12EO) were observed at both works, which had equal sludge ages of 13 days. However, the biological activity in terms of milligrams of estrogen removed per day per tonne of biomass was found to be 50−60% more efficient in the nitrifying/denitrifying activated sludge works compared to the works which additionally incorporated phosphorus removal. A temperature reduction of 6 °C had no impact on the removal of free estrogens, but removal of the conjugated estrone-3-sulfate was reduced by 20%. The apparent biomass sorption (LogKp) values were greater in the nitrifying/denitrifying works than those in the nitrifying/denitrifying works with phosphorus removal for both steroid estrogens and nonylphenolic compounds possibly indicating a different cell surface structure and therefore microbial population. The difference in biological activity (mg tonne−1 d−1) identified in this study, of up to seven times, suggests that there is the potential for enhancing the removal of estrogens and nonylphenols if more detailed knowledge of the factors responsible for these differences can be identified and maximized, thus potentially improving the quality of receiving waters.Public Utilities Board (Singapore), Anglian Water Ltd, Severn Trent Water Ltd, Thames Water Utilities Ltd, United Utilities 393 Plc and Yorkshire Water Services
La cerámica de estilo Cogotas I y los ciclos culturales en las postrimerías de la Edad del Bronce en Navarra
En el presente artículo se analizan los yacimientos conocidos en Navarra
con cerámica decorada de estilo Cogotas I, situándolos en su contexto cronológico y
cultural. Se analiza la división del territorio en dos grupos con importantes diferencias
culturales
Assessing the degradation of ochratoxin a using a bioassay : the case of contaminated winery wastewater
In vineyards the presence of certain fungi may lead to the production of the mycotoxin ochratoxin A (OTA) and subsequent contamination of grapes and wine. Furthermore, winery wastewaters contaminated with OTA may represent an environmental hazard. Therefore it is imperative to assess the fate of this mycotoxin in conventional wastewater treatment systems.
The aim of the present work in this context is to assess the biological degradation of OTA. Experimental work was carried out in batch experiments with initial OTA to biomass concentration ratios (S0/X0) of 1.4 μg mg-1, 7.4 μg mg-1 and 11.9 μg mg-1. The assays were inoculated with activated sludge biomass unadapted to the substance under examination. The proposed bioassay demonstrates that OTA concentrations up to 100 μg L-1 can be degraded by microbial activity in activated sludge
The initial peopling of the Americas: a growing number of founding mitochondrial genomes from Beringia
Pan-American mitochondrial DNA (mtDNA) haplogroup C1 has been recently subdivided into three branches, two of which (C1b and C1c) are characterized by ages and geographical distributions that are indicative of an early arrival from Beringia with Paleo-Indians. In contrast, the estimated ages of C1d—the third subset of C1—looked too young to fit the above scenario. To define the origin of this enigmatic C1 branch, we completely sequenced 63 C1d mitochondrial genomes from a wide range of geographically diverse, mixed, and indigenous American populations. The revised phylogeny not only brings the age of C1d within the range of that of its two sister clades, but reveals that there were two C1d founder genomes for Paleo-Indians. Thus, the recognized maternal founding lineages of Native Americans are at least 15, indicating that the overall number of Beringian or Asian founder mitochondrial genomes will probably increase extensively when all Native American haplogroups reach the same level of phylogenetic and genomic resolution as obtained here for C1d.Fil: Perego, Ugo A.. Soreson Molecular Genealogy Foundation; Estados Unidos. Università di Pavia. Dipartimento di Genetica e Microbiologia; ItaliaFil: Angerhofer, Norman. Soreson Molecular Genealogy Foundation; Estados UnidosFil: Pala, Maria. Università di Pavia. Dipartimento di Genetica e Microbiologia; ItaliaFil: Olivieri, Anna. Università di Pavia. Dipartimento di Genetica e Microbiologia; ItaliaFil: Lancioni, Hovirag. Universita Di Perugia; ItaliaFil: Kashani, Baharak Hooshiar. Università di Pavia. Dipartimento di Genetica e Microbiologia; ItaliaFil: Carossa, Valeria. Università di Pavia. Dipartimento di Genetica e Microbiologia; ItaliaFil: Ekins, Jayne E.. Soreson Molecular Genealogy Foundation; Estados UnidosFil: Gómez Carballa, Alberto. Universidad de Santiago de Compostela; EspañaFil: Huber, Gabriela. Universidad de Innsbruck; AustriaFil: Zimmermann, Bettina. Universidad de Innsbruck; AustriaFil: Corach, Daniel. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Servicio de Huellas Digitales Genéticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Babudri, Nora. Universita Di Perugia; ItaliaFil: Panara, Fausto. Universita Di Perugia; ItaliaFil: Myres, Natalie M.. Soreson Molecular Genealogy Foundation; Estados UnidosFil: Parson, Walther. Universidad de Innsbruck; AustriaFil: Semino, Ornella. Università di Pavia. Dipartimento di Genetica e Microbiologia; ItaliaFil: Salas, Antonio. Universidad de Santiago de Compostela; EspañaFil: Woodward, Scott R.. Soreson Molecular Genealogy Foundation; Estados UnidosFil: Achilli, Alessandro. Università di Pavia. Dipartimento di Genetica e Microbiologia; Italia. Universita Di Perugia; ItaliaFil: Torroni, Antonio. Università di Pavia. Dipartimento di Genetica e Microbiologia; Itali
The time response of anaerobic digestion microbiome during an organic loading rate shock.
Knowledge of connections between operational conditions, process stability, and microbial community dynamics is essential to enhance anaerobic digestion (AD) process efficiency and management. In this study, the detailed temporal effects of a sudden glycerol-based organic overloading on the AD microbial community and process imbalance were investigated in two replicate anaerobic digesters by a time-intensive sampling scheme. The microbial community time response to the overloading event was shorter than the shifts of reactor performance parameters. An increase in bacterial community dynamics and in the abundances of several microbial taxa, mainly within the Firmicutes, Tenericutes, and Chloroflexi phyla and Methanoculleus genera, could be detected prior to any shift on the reactor operational parameters. Reactor acidification already started within the first 24 h of the shock and headed the AD process to total inhibition in 72 h alongside with the largest shifts on microbiome, mostly the increase of Anaerosinus sp. and hydrogenotrophic methanogenic Archaea. In sum, this work proved that AD microbial community reacts very quickly to an organic overloading and some shifts occur prior to alterations on the performance parameters. The latter is very interesting as it can be used to improve AD process management protocols.pre-print1710 K
Treatment of low strength sewage with high suspended organic matter content in an anaerobic sequencing batch reactor and modeling application
In this work, an anaerobic sequencing batch reactor (ASBR) was operated
for 8 months to treat low strength sewage with high suspended organic
matter content. Three phases of operation with increasing organic
loading rates (OLR) were performed: 0.4 kg COD/m3 x d (phase I), 0 .8
kg COD/m3 x d (phase II) and 1.2 kg COD/m3 x d (phase III). Adequate
stability parameters (pH, total alkalinity) were obtained through all
three experimental phases. During phases I and II, the removal
efficiencies of organic matter (expressed as total chemical oxygen
demand (COD) and total suspended solids ranged between 50-60%. However,
these values decreased to 15-25% in phase III. In addition, a
non-complex model, including hydrolysis, acidogenesis and
methanogenesis, was applied to predict the reactor behavior
Un caso de ajusticiamiento en Pompelo
En el desarrollo de la intervención arqueológica realizada en la plaza del Castillo Pamplona) se identificó una fosa correspondiente a una inhumación múltiple sincrónica, como consecuencia de un ajusticiamiento. Contenía los esqueletos de cinco hombres adultos,arrojados al interior de la sepultura sin respetar las pautas habituales de los rituales funerarios. Uno de ellos presentaba los brazos en una posición muy forzada, a causa de llevar las manos atadas a la espalda. La cronología, obtenida a partir de una datación absoluta por AMS ha fechado la inhumación en un arco cronológico situado entre los siglos II y IV.------------In the development of the archaeological intervention carried out in the plaza del Castillo (Pamplona) a grave corresponding to a multiple synchronous burial was identified, as a result of an execution. The grave contained the skeletons of five adult men, thrown into the interior of the burial without respecting the standard of funeral rituals. One of them presented the arms in a very forced position, because of carry their hands tied behind his back. The chronology, obtained from an AMS radiocarbon dating, has dated the burial in a chronological arc situated between the II and IV centuries
Rudeva: una herramienta para la implantación de rúbricas de evaluación
Poster presentado en: IV Xornadas de Innovación Docente 2020. Cufie. Universidade da Coruña. A Coruña[Resumen]: En el proceso educativo, uno de los procesos más importantes en el proceso educativo y, a la vez más costosos en cuanto al tiempo dedicado es el relativo a la evaluación (de la Garza, 2004). Sobre todo cuando se trata de trabajos en los que se han de analizar múltiples aspectos, tener en cuenta varias métricas, etc.
En este ámbito resulta de gran ayuda el empleo de rúbricas, además de facilitar la tarea de uniformizar las correcciones (Valverde&Ciudad, 2014). Con el objetivo de prestar apoyo en esta tarea, se plantea el desarrollo de una herramienta de gestión de rúbricas que facilite la evaluación de trabajos.
La herramienta se desarrolla con la finalidad de facilitar la gestión de las rúbricas, desde su creación, actualización, búsqueda o uso durante la evaluación.
Por ejemplo, permitirá definir para una evaluación una serie de áreas que a su vez se componen de subáreas. En el caso de una rúbrica para la evaluación de TFG se podrían definir las áreas Memoria, Presentación y/o Calidad del Trabajo desarrollado y en cada una de ellas se definirían como subáreas los criterios a evaluar (e.g. adecuación lenguaje empleado, corrección referencias, A la hora de evaluar, el examinador puntuará cada subárea y esto generará calificación de manera automática. Se podrán añadir observaciones en cualquier apartado evaluable y las evaluaciones podrán ser individuales (en todas las áreas o sólo en alguna) o grupales
Impact of landscape on spatial genetic structure and diversity of Coenagrion mercuriale (Zygoptera: Coenagrionidae) in northern France
Loss and fragmentation of habitat is a current main cause of biodiversity loss in freshwater habitats. Odonates (dragonflies and damselflies) depend on these habitats to complete their development. Fragmentation may be a particular threat for odonates because it generates a network of small habitat patches within which populations could suffer from isolation and loss of genetic diversity. The southern damselfly Coenagrion mercuriale is categorized on the IUCN red list as Near Threatened, largely because of population fragmentation and demographic declines associated with changes in land use. Small populations at the margin of this species’ range are of particular concern because they would be prone to detrimental effects of habitat fragmentation if this species were a poor disperser. We sampled C. mercuriale in 16 habitat patches (localities) at 4 main sites in the department of Pas-de-Calais in northwestern France to quantify factors that affect dispersal and genetic diversity. Specimens were genotyped at 12 microsatellite loci to quantify genetic diversity, genetic differentiation, and the potential effect of landscape variables on genetic differentiation, and to detect any potential source–sink structure. Habitat separation had a limiting effect on dispersal by C. mercuriale, resulting in 3 main genetic clusters and weak divergence at the main site of Vallée de la Course. Genetic differentiation was low in each main site, implying that the localities within sites were connected at scales of up to ∼2 km, albeit with some evidence for isolation at the more isolated localities. Given the degree of isolation of some areas and a lack of apparent genetic mixing in the intervening populations, any movement among the most distantly separated sites must have occurred some time ago. We identified barriers to dispersal, such as woodland, but detecting an unambiguous effect of certain variables, such as urbanization, was difficult because many landscape features were highly correlated
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