First record of South American Terns <i>Sterna hirundinacea</i> breeding in a riverine environment (Río Negro, Argentina)

We describe a breeding co1ony of South American Tern <i>Sterna hirundinacea</i> in an island of the Río Negro river, 45 km NW of the city of Viedma, Argentina. It is the first record of a breeding colony of this species in a riverine environment

First record of South American Terns <i>Sterna hirundinacea</i> breeding in a riverine environment (Río Negro, Argentina)

We describe a breeding co1ony of South American Tern <i>Sterna hirundinacea</i> in an island of the Río Negro river, 45 km NW of the city of Viedma, Argentina. It is the first record of a breeding colony of this species in a riverine environment

Effective Microorganisms: Myth or reality?

Th e increase in population has lead to intensifi cation of agricultural systems. Due to the use of pesticides the productivity of agricultural systems has increased but environmental deterioration and unsustainable systems are the consequences of these ways of management. Th e environmentally friendly Eff ective Microorganisms (EM) technology claims an enormous amount of benefi ts (claimed by the companies). Th e use of EM as an addictive to manure or as a spray directly in the fi elds may increase the microfauna diversity of the soil and many benefi ts are derived from that increase. It seems that suffi cient information is available about this new technology. Th e aim of this project is to make an analysis of the literature about EM and answer the following questions: 1) how much is known about EM?, 2) how much research is done on EM?, 3) what are the principals of EM?, what are the socio-economic implications of EM?. We want to answer these questions in order to publish the facts about EM and its socio-economic implications.Th e increase in population has lead to intensifi cation of agricultural systems. Due to the use of pesticides the productivity of agricultural systems has increased but environmental deterioration and unsustainable systems are the consequences of these ways of management. Th e environmentally friendly Eff ective Microorganisms (EM) technology claims an enormous amount of benefi ts (claimed by the companies). Th e use of EM as an addictive to manure or as a spray directly in the fi elds may increase the microfauna diversity of the soil and many benefi ts are derived from that increase. It seems that suffi cient information is available about this new technology. Th e aim of this project is to make an analysis of the literature about EM and answer the following questions: 1) how much is known about EM?, 2) how much research is done on EM?, 3) what are the principals of EM?, what are the socio-economic implications of EM?. We want to answer these questions in order to publish the facts about EM and its socio-economic implications

Fate of Bacillus cereus within phagocytic cells

In this study we assessed the interaction of different strains of Bacillus cereus with murine peritoneal macrophages and cultured phagocytic cells (Raw 264.7 cells). Association, internalization, intracellular survival, routing of bacteria to different compartments and expression of MHCII were assessed in cells infected with different strains of B. cereus in vegetative form. Association values (adhering + internalized bacteria) and phagocytosis were higher for strain B10502 than those for strains 2 and M2. However, after 90 min interaction, intracellular survival was higher for strain 2 than for strains M2 and B10502. Acquisition of lysosomal markers by B. cereus containing vacuoles (BcCV), assessed by LAMP1 and Lysotracker labelling occurred shortly after internalization. The highest ratio of LAMP1(+)-BcCV was found for strain M2. This strain was able to survive longer than strain B10502 which routes to LAMP1 containing vacuoles to a lesser extent. In addition, strain M2 stimulated expression of MHCII by infected cells. Confocal analyses 60 or 90 min post-infection showed different percentages of co-localization of bacteria with Lysotracker. Results suggest strain-dependent interaction and intracellular killing of B. cereus by phagocytic cells. These findings could be relevant for the pathogenic potential of Bacillus cereus strains.Keywords:&nbsp;Bacillus cereus &middot; LAMP1 &middot; phagocytosis &middot; virulence &middot; endocytic pathway &middot; intracellular traffickin

A case of intoxication due to a highly cytotoxic Bacillus cereus strain isolated from cooked chicken

Outbreaks of Bacillus cereus infection/intoxication are not commonly reported because symptoms are often mild, and the disease is self-limiting. However, hypervirulent strains increase health risks. We report a case, which occurred in Argentina, of severe food The studied strain was highly cytotoxic, showed high ability to detach Caco-2 cells and was positive for the hblA, hblB, and hblC genes of the hbl complex, bceT, entS and ces. As it is considered that B. cereus emetic cluster evolved from a panmictic population of diarrhoeal strains, B. cereus MVL2011 could constitute an intermediate strain between diarrhoeal and emetic strains.Prepint aceptado el 14 de agosto de 2014 para su publicación

Arrested dynamics of the dipolar hard-sphere model

We report the combined results of molecular dynamics simulations and theoretical calculations concerning various dynamical arrest transitions in a model system representing a dipolar fluid, namely, N (softcore) rigid spheres interacting through a truncated dipole-dipole potential. By exploring different regimes of concentration and temperature, we find three distinct scenarios for the slowing down of the dynamics of the translational and orientational degrees of freedom: At low ({$\eta$} = 0.2) and intermediate (${\eta}$ = 0.4) volume fractions, both dynamics are strongly coupled and become simultaneously arrested upon cooling. At high concentrations ({$\eta$} $\lt$ 0.6), the translational dynamics shows the features of an ordinary glass transition, either by compressing or cooling down the system, but with the orientations remaining ergodic, thus indicating the existence of partially arrested states. In this density regime, but at lower temperatures, the relaxation of the orientational dynamics also freezes. The physical scenario provided by the simulations is discussed and compared against results obtained with the self-consistent generalized Langevin equation theory, and both provide a consistent description of the dynamical arrest transitions in the system. Our results are summarized in an arrested states diagram which qualitatively organizes the simulation data and provides a generic picture of the glass transitions of a dipolar fluid

A Map of Urban Tales. Laboratory Q, a Place for Urban Creativity

Laboratorio Q, de lugares de creatividad urbana, es una plataforma de investigación creada para el estudio de la ciudad contemporánea. Registra en un mapa virtual y de una forma participativa, procesos, espacios y acciones creativas que se hayan dado en la ciudad de Sevilla entre 1996 y 2012; un final de periodo marcado por la crisis económica. Este artículo presenta en un formato de manifiesto las bases estructurales que sustentan este proyecto. Cada enunciado funciona en relación con un todo y de forma autónoma describe la estrategia ideada y declara un posicionamiento ante la construcción de una historia urbana común.Laboratory Q, a place for urban creativity is a research platform set up to study the contemporary city. Contained in a participatory virtual map are processes, spaces, and creative actions that took place in Seville between 1996 and 2012, the last part of which was defined by the economic crisis. This article is structured like a manifesto and presents the structural foundations that hold up the project. Each declaration works autonomously in relation to everything, describes the ideal strategy, and states how common urban tales are constructed

First record of South American Terns Sterna hirundinacea breeding in a riverine environment (Río Negro, Argentina)

We describe a breeding co1ony of South American Tern Sterna hirundinacea in an island of the Río Negro river, 45 km NW of the city of Viedma, Argentina. It is the first record of a breeding colony of this species in a riverine environment

Territorial Dynamics of Spanish Members of Parliament (1977-2020)

The Congress of Deputies should supposedly represent the entire Spanish population and the Spanish Constitution provides mechanisms to ensure geographic representation in the lower house. However, the mobility of the members of parliament (MPs) across constituencies can generate territorial representation imbalances. Based on the territorial component of descriptive representation, this article analyses the unequal geographic representation of autonomous communities in the Congress. A descriptive statistical assessment was conducted based on MPs' autonomous community of birth, the autonomous community for which they have a seat, the role played by political parties, and the way in which territorial representation occurs within the hyper elite. Special attention was paid to the representation of peripheral regions and to the drivers of overrepresentation (and underrepresentation) of some regions in the Congress. It was observed that-with few exceptions-territorial peripheries includemore native MPs, export fewerMPs, and are generally underrepresented in the Congress and within the hyper elite. In contrast, the Basque Country (an exception), Madrid, and other central territories are overrepresented in the Congress. Finally, four models of descriptive territorial representation were identified, which correspond to Spain's different territorial tensions.Universidad Pablo de Olavide. Departamento de Sociologí