IAMSEST secundario a síndrome de Kounis tipo I inducido por alimentos

Kounis syndrome is characterized by an acute coronary episode in the context of an anaphylactic reaction; the pathophysiology is varied but is based on the release of vasoactive substances from mast cell degranulation. We present a case of a patient who debuted as a NSTEMI in the context of anaphylactic shock triggered by food. The patient presented angina, abnormalities in electrocardiogram, and troponin elevation; echocardiography and coronary angiography were normal. The patient responded favorably to treatment with corticosteroids, antihistamines and antiplatelet agents. He was discharged without symptoms.El síndrome de Kounis se caracteriza por un episodio coronario agudo en el contexto de una reacción anafiláctica; la fisiopatología es variada, pero se basa en la liberación de sustancias vasoactivas derivadas de la degranulación de los mastocitos. Se presenta el caso de un paciente que debutó como un IAMSEST en el contexto de un shock anafiláctico desencadenado por alimentos; presentó angina, alteraciones en el electrocardiograma y elevación de troponinas, la ecocardiografía y la coronariografía fueron normales. El paciente presentó evolución favorable con tratamiento a base de corticoides, antihistamínicos y antiagregantes, y fue dado de alta asintomático

Origin, accumulation and fate of dissolved organic matter in an extreme hypersaline shallow lake

Hypersaline endorheic aquatic systems (H-SEAS) are lakes/shallow playas in arid and semiarid regions that undergo extreme oscillations in salinity and severe drought episodes. Although their geochemical uniqueness and microbiome have been deeply studied, very little is known about the availability and quality of dissolved organic matter (DOM) in the water column. A H-SEAS from the Monegros Desert (Zaragoza, NE Spain) was studied during a hydrological wetting-drying-rewetting cycle. DOM analysis included: (i) a dissolved organic carbon (DOC) mass balance; (ii) spectroscopy (absorbance and fluorescence) and (iii) a molecular characterization with Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). The studied system stored a large amount of DOC and under the highest salinity conditions, salt-saturated waters (i.e., brines with salinity > 30%) accumulated a disproportionate quantity of DOC, indicating a significant in-situ net DOM production. Simultaneously, during the hydrological transition from wet to dry, the DOM pool showed strong alterations of it molecular composition. Spectroscopic methods indicated that aromatic and degraded DOM was rapidly replaced by fresher, relatively small, microbial-derived moieties with a large C/N ratio. FT-ICR-MS highlighted the accumulation of small, saturated and oxidized molecules (molecular O/C > 0.5), with a remarkable increase in the relative contribution of highly oxygenated (molecular O/C > 0.9) compounds and a decrease of aliphatic and carboxyl-rich alicyclic moleculesThese results indicated that H-SEAS are extremely active in accumulating and processing DOM, with the notable release of organic solutes probably originated from decaying microplankton under large osmotic stress at extremely high salinitie

Caracterizació ecofisiològica d'un mutant de Rhodobacter sphaeroides deficient en la síntesi de carotenoides

A mutant strain of Rhodobacter sphaeroides, altered in carotenoid biosynthesis. was compared to the wild type in relation to the physiological response of both strains to different light intensities (230-925 lux). Absorption spectra analysis showed that spheroidene, the main carotenoid present in this species, was substituted by chloroxanthin (hydroxyneurosporene) in the mutant strain. The mutation does not affect significantly the growh of the mutant under neither photoorganoheterotrophic nor chemoorganoheterotrophic metabolisms. Mutant cells growing anaerobically at light intensities below 800 lux, surprisingly showed higher growth rates than wild type cells. At light intensities above 800 lux, growth rates of both strains were very similar. Growth rates in chemoorganotrophic metabolism were much higher than in photoorganotrophic growth for both strains. Although pigments do not intervene in nonphotosynthetic metabolism, the wild type strain showed a higher growth rate than the mutant strain. In addition to growth rate measurement, pigment content was studied in order to characterize the physiological behaviour of the mutant. In the wild type strain, specific pigment content decreased as light intensity increased. Bacteriochlorophyll and carotenoids showed the same response. On the contrary, for the mutant cells, bacteriochlorophyll specific content was much higher at high light intensities than at the lower ones. Carotenoids had very low specific content. which was independent of light intensity. Both the physiological implications and the possible ecological meaning of that behaviour are discussed

Professional development programmes for teachers moving from majority to minoritised language medium education:Lessons from a comparative study

Education through the medium of a minoritised language is widely regarded as a critical component of language revitalisation initiatives. Given the demographic and social position of many minoritised languages, however, it may not be easy to find teachers who are fluent and literate in the language, confident about using and teaching it, and prepared for the demands of working in classrooms where the language is the medium of instruction. This article presents findings from a comparative study of teacher education programmes adopted in Catalonia, the Basque Autonomous Community, Wales and New Zealand, to prepare teachers to teach through the media of Catalan, Basque, Welsh and Māori respectively. The research was conducted to inform new professional development initiatives in Scotland, designed to enable qualified teachers to transfer from English-medium to Gaelic-medium education. The findings have wider relevance for other contexts in which the recruitment, professional development and retention of teachers to work in minoritised language medium education represent a challenge

First Case of Albinism in Egyptian Vultures

Peer reviewe

Presencia y génesis de los minerales fibrosos de la arcilla en las proximidades de Villamuriel de Cerrato. Provincia de Palencia

RESUMEN: Se estudian los materiales margosos de edad Neógena que añoran en las proximidades de Villamuriel de Cerrato, provincia de Palencia (Cuenca del Duero). En ellos se ha observado la presencia prácticamente constante de sepiolita, paligorskita e iluta y ocasionalmente de esmectitas y caolinita. La sepiolita predomina sobre el resto de minerales arcillosos. Se revisan las condiciones genéticas que conducen a la formación de los minerales fibrosos de la arcilla. En nuestro caso se observa una relación directa entre procesos de disolución de dolomita, formación de un gel silicatado y desarrollo de fibras incipientes de sepiolita y paligorskita a partir de él