Search results for "Centro"

Securitización urbana en el centro histórico de Valencia: actores, dispositivos y discursos

2022

Este artículo presenta un análisis etnográfico de los procesos de securitización urbana que están teniendo lugar en un barrio del centro histórico de Valencia. Trazamos una economía política de la securitización urbana en la escala local, fijándonos en el papel desempeñado por una pluralidad de actores entre los que encontramos vecindario, movimientos urbanos, cuerpos policiales e instituciones locales. El análisis se centra en una multiplicidad de dispositivos y tácticas securitarias, desde las arquitecturas preventivas y el urbanismo punitivo hasta la policialización de la convivencia vecinal y la implementación de ordenanzas de civismo, pasando por los sistemas privados de vigilancia. No…

Species diversity of the deep-water gulper sharks (Squaliformes: Centrophoridae:Centrophorus) in North Atlantic waters - current status and taxonomic…

2014

The gulper sharks (genus Centrophorus) are a group of deep-water benthopelagic sharks with a worldwide dis- tribution. The alpha taxonomy of the group has historically been problematic and the number of species included in the genus has varied considerably over the years and is still under debate. Gulper sharks are routinely caught in mid- and deep-water fisheries worldwide and some have shown a considerable decline in abundance in the last few decades. Clear and consistent species discrimination of Centrophorus is essential for an efficient and sustain- able management of these fisheries resources. Our study used molecular cytochrome oxidase subunit I (COI) and 16S ribosomal RNA gene seque…

Heat Shock Proteins in Sea Urchin Embryos. (heat shock proteins/sea urchin embryos)

1989

Cytochrome oxidase activity in the mitochondria of unfertilized and fertilized sea urchin eggs

1959

Abstract The cytochrome oxidase activity of isolated mitochondria of unfertilized and fertilized eggs of Paracentrotus lividus has been studied. It has been found that whereas in the mitochondria of unfertilized eggs saturation is reached at a cytochrome c concentration of 3.28 × 10−5 M, in those of fertilized eggs this occurs at a concentration of 5.74 × 10−5 M. It is shown that upon fertilization an increase of about 30 per cent of the activity of cytochrome oxidase takes place and no further changes appear to occur until blastula stage.

Antimicrobial and antistaphylococcal biofilm activity from the sea urchin Paracentrotus lividus

2010

Aims:  Staphylococcal biofilm-associated infections are resistant to conventional antibiotics. Consequently, new agents are needed to treat them. With this aim, we focused on the effector cells (coelomocytes) of the sea urchin Paracentrotus lividus immune system. Methods and Results:  We tested the activity of the 5-kDa peptide fraction of the cytosol from coelomocytes (5-CC) against a group of Gram-positive, Gram-negative bacteria and fungi. We determined minimal inhibitory concentrations (MICs) ranging from 253·7 to 15·8 mg ml−1. We observed an inhibitory activity and antibiofilm properties of 5-CC against staphylococcal biofilms of reference strains Staphylococcus epidermidis DSM 3269 an…

Classification of Chitinozoa (Llandoverian, Canada) Using Image Analysis

1996

Chitinozoa (Llandoverian, Canada) were studied using image analysis. After digitalization of the objects, shape parameters were calculated. The boundary of each fossil was then traced by a vector centred at the centroid for Fast Fourier Transform (FFT). Results of the two methods were used as variables in a hierarchical cluster analysis in order to group the samples. These results show that Chitinozoa can be significantly classified in terms of taxa using independent shape parameters obtained by image analysis.

Effect of exposure cadmium on the echinoderm Paracentrotus lividus (Echinoidea)

2008

Vite: allarme per i cancri da Botryosphaera

2011

Privato versus pubblico. Il progetto per un ambito urbano più vivibile

2015

Esistono realtà urbane nel territorio del comune di Agrigento accomunate da arretratezza culturale e sociale, assenza di servizi basilari, scarsa qualità architettonica ed infrastrutturale, squilibrio tra spazio pubblico e privato. Tali ambiti, nonostante siano vivaci da un punto di vista commerciale, si possono definire come nonluoghi, con tutte le implicazioni che tale locuzione comporta. Villaggio Mosè rappresenta un caso emblematico. Da un lato il rapporto con l’esterno: il mare, le colline e la vicinanza con la Valle dei Templi, dall’altro quello con l’interno: la strada statale n.115 che costituisce l'asse portante di un ambito caratterizzato da un edificato incontrollato, spesso spon…

Revista de educación

2013

En este artículo planteamos que desde la institución escolar se experimentan múltiples formas de participación en la sociedad de la información. Estas formas trascienden los parámetros clásicos en el análisis de la relación de la escuela con las TIC. Las formas recogen actividades organizadas por estructuras sólidas desarrolladas en el entorno social y, lo más relevante, la mayoría se realizan en los límites de la organización escolar. Precisamente por esta razón se convierten en actividades complejas de evaluar y en muchos casos son focos de controversia. Desde esta perspectiva planteamos el caso estudiado en este trabajo: la forma de videovigilancia suscita duras controversias en muchos d…