Los anillos de la discordia

Duración (en horas): Menos de 10 horas. Nivel educativo: Grado

Activation of violaxanthin cycle in darkness is a common response to different abiotic stresses : a case study in Pelvetia canaliculata

Background: In the violaxanthin (V) cycle, V is de-epoxidized to zeaxanthin (Z) when strong light or light combined with other stressors lead to an overexcitation of photosystems. However, plants can also suffer stress in darkness and recent reports have shown that dehydration triggers V-de-epoxidation in the absence of light. In this study, we used the highly stress-tolerant brown alga Pelvetia canaliculata as a model organism, due to its lack of lutein and its non-photochemical quenching independent of the transthylakoidal-ΔpH, to study the triggering of the V-cycle in darkness induced by abiotic stressors. Results: We have shown that besides desiccation, other factors such as immersion, anoxia and high temperature also induced V-de-epoxidation in darkness. This process was reversible once the treatments had ceased (with the exception of heat, which caused lethal damage). Irrespective of the stressor applied, the resulting de-epoxidised xanthophylls correlated with a decrease in Fv/Fm, suggesting a common function in the down-regulation of photosynthetical efficiency. The implication of the redox-state of the plastoquinone-pool and of the differential activity of V-cycle enzymes on V-de-epoxidation in darkness was also examined. Current results suggest that both violaxanthin de-epoxidase (VDE) and zeaxanthin-epoxidase (ZE) have a basal constitutive activity even in darkness, being ZE inhibited under stress. This inhibition leads to Z accumulation. Conclusion: This study demonstrates that V-cycle activity is triggered by several abiotic stressors even when they occur in an absolute absence of light, leading to a decrease in Fv/Fm. This finding provides new insights into an understanding of the regulation mechanism of the V-cycle and of its ecophysiological roles.

Hago click y opero a tu lado: Estrategia de la banca online en España

[ES] La estrategia de la Banca española con respecto a Internet se ha enmarcado entre la modernización del sector y el miedo a la competencia de terceras partes. En el artículo mostramos como, desde la efervescencia inicial, las entidades se han centrado en construir un negocio rentable parte de una estrategia multicanal. Sin embargo todavía las instituciones españolas no han conseguido aprovechar todas las ventajas que presenta Internet a la hora de facilitar la comercialización de productos financieros.

Causas y consecuencias de la insatisfacción en consumidores con atribuciones externas

[ES] Este trabajo aborda el estudio de la formación de la insatisfacción, desde la perspectiva cognitiva y afectiva, y de sus consecuencias en forma de intenciones de comportamientos de queja. El objetivo es investigar la influencia directa e indirecta, a través de los afectos negativos, que ejerce la desconfirmación de expectativas sobre la insatisfacción, y analizar la contribución de estos juicios sobre las intenciones de respuestas de queja, a terceras partes y privadas. A partir de una muestra de clientes insatisfechos con restaurantes que manifiestan distintos niveles de atribución externa, se ha construido un modelo causal para estudiar las relaciones.

Adición conjugada asimétrica de equivalentes umpolung de acilo y carboxilo : auxiliares quirales vs organocatálisis

365 p.

Atlas de experiencias innovadoras en educación física

Duración (en horas): Más de 50 horas. Destinatario: Estudiante y Docente

Objektu-komunztadura XIX eta XX. mendeetako euskal gramatiketan

Beatriz Fernández eta Pablo Albizu (arg.)

Kv7 Channels Can Function without Constitutive Calmodulin Tethering

9 p.

Candida albicans Increases Tumor Cell Adhesion to Endothelial Cells In Vitro: Intraspecific Differences and Importance of the Mannose Receptor

The dimorphic fungus Candida albicans is able to trigger a cytokine-mediated pro-inflammatory response that increases tumor cell adhesion to hepatic endothelium and metastasis. To check the intraspecific differences in this effect, we used an in vitro murine model of hepatic response against C. albicans, which made clear that tumor cells adhered more to endothelium incubated with blastoconidia, both live and killed, than germ tubes. This finding was related to the higher carbohydrate/protein ratio found in blastoconidia. In fact, destruction of mannose ligand residues on the cell surface by metaperiodate treatment significantly reduced tumor cell adhesion induced. Moreover, we also noticed that the effect of clinical strains was greater than that of the reference one. This finding could not be explained by the carbohydrate/protein data, but to explain these differences between strains, we analyzed the expression level of ten genes (ADH1, APE3, IDH2, ENO1, FBA1, ILV5, PDI1, PGK1, QCR2 and TUF1) that code for the proteins identified previously in a mannoprotein-enriched pro-metastatic fraction of C. albicans. The results corroborated that their expression was higher in clinical strains than the reference one. To confirm the importance of the mannoprotein fraction, we also demonstrate that blocking the mannose receptor decreases the effect of C. albicans and its mannoproteins, inhibiting IL-18 synthesis and tumor cell adhesion increase by around 60%. These findings could be the first step towards a new treatment for solid organ cancers based on the role of the mannose receptor in C. albicans-induced tumor progression and metastasis.

Formación profesional, pymes e innovación en Navarra

Los estudios recientes sobre sistemas de innovación no han prestado suficiente atención al papel que los centros de Formación Profesional y los trabajadores técnicos pueden jugar en los procesos de innovación. Este estudio parte de una revisión del estado de la cuestión en la literatura internacional y, en base a una encuesta a pymes industriales, completada con entrevistas cualitativas con responsables de centros de FP, pymes y actores institucionales, analiza la incidencia y el alcance de los distintos tipos de relación entre centros de FP y empresas en la Comunidad Foral de Navarra (una región con un alto nivel industrial y de Formación Profesional). Los resultados muestran que, si bien las funciones de preparación del capital humano e inserción en las empresas tienen un nivel notable, objetivos menos tradicionales de los centros de FP como la formación continua y el apoyo a la innovación tienen un alcance, a día de hoy, limitado. Por parte de las empresas, existe un reconocimiento incipiente del papel que los trabajadores técnicos pueden jugar en los procesos de innovación aunque, en general, el sistema de FP y el sistema de innovación se encuentran insuficientemente conectados.

Los arcaísmos en el cine: estudio de dos traducciones de "Enrique V"

Santamaría, José Miguel; Pajares, Eterio; Olsen, Vickie; Merino, Raquel; Eguíluz, Federico (eds.)

Bikoizketa euskaraz

Raquel Merino Álvarez, José Miguel Santamaría, Eterio Pajares (eds.)

Introducción a Gretl 1.9.12 para Econometría

Guía para el uso de Gretl en un curso introductorio de Econometría y/o análisis de datos

Der Sängerkrieg auf der Wartburg. El tema de la lid de los poetas y su recepción literaria en Novalis, E. T. A. Hoffmann, Friedrich de la Motte Fouqué y Richard Wagner

282 págs.Correo electrónico: bea.muro@gmail.com

Process management in healthcare.Sant Camil Hospital case study

Nowadays due to the crisis, some government measures are aimed at reducing healthcare spending, affecting in some level or another the quality offered. Process management is said to be a useful tool for reducing healthcare costs by improving management without any additional economic investment. That is doing more with the same resources and without reducing the quality offered. In this study an empirical case of a Catalan hospital is presented. Overall, the usefulness of process management in the healthcare sector is shown and some tips are provided for those managers that want to implement this management system in their hospitals. This work is also interesting for those managers responsible for the National Healthcare System due to a big question is stated: what would happen if process management was implemented in the whole healthcare system?