MALDI_TOF mass spectrometry does not differentiate between brucella species, suggesting that the may represent a single species

Comunicaciones a congreso

Comparison of Maldi-Tof with gene sequencing in bacteria isolates from plants belonging to family Rhizobiaceae

Comunicaciones a congreso

Habitat use by Gadiculus argenteus (Pisces, Gadidae) in the Galician and Cantabrian Sea waters (NE Atlantic)

Forage fish species play a crucial role in most ecosystems, transferring energy from plankton to larger fishes. Therefore, understanding the factors driving the dynamics of forage fish populations is essential in marine ecosystems. Gadiculus argenteus is an important forage fish species in the Galicia and Cantabrian Sea ecosystem. In this study, the influence of several biotic and abiotic factors on the distribution of this species was examined using generalized additive models in a 2-step approach. G. argenteus habitat preference was not affected by changes in annual abundance during the study period (1998-2019). From the variables selected in the final models, depth and geographic location (latitude and longitude) were the most important factors to describe the presence of G. argenteus. Peak abundance was found on the upper slope and although the species was found throughout the study area, its higher abundance values were located in Galician waters. The species seemed to avoid coarse sand bottoms, with mean chlorophyll a concentration showing a positive effect on the presence and abundance of G. argenteus. Interestingly, the observed aggregations of G. argenteus showed a remarkable similarity to the commercial trawling footprint in the area, suggesting a strong link between the distribution of this forage species and the distribution of its predators, most of which are important commercial species. Further work should focus on a better understanding of this relationship to provide important information on the study of the structure and functioning of the marine ecosystem of the northern Spanish continental shelf.Versión del editor2,48

Living at the top. Connectivity limitations and summit depth drive fish diversity patterns in an isolated seamount

The fish assemblages of the Galicia Bank and the closest continental slope (northwest of Spain) were analysed using otter trawls to improve our understanding of how environmental drivers structure seamount fish communities in the deep sea. The effect of environmental drivers on these assemblages was studied using multivariate techniques together with the variation in α and β diversity across assemblages. Fish fauna in the study area was distributed in 5 different assemblages generated by the action of 3 main drivers: depth, distance to the coast and presence of cold-water corals. The observed differences in species composition among assemblages were mostly explained by species turnover across a depth gradient. The seamount summit and the continental slope showed important differences despite sharing similar depths, mainly because several species requiring shallow juvenile habitats were absent from the summit. These absences were observed in both summit assemblages inside and outside the cold-water coral reef. Our results show that in isolated seamounts with relatively deep summits, the lack of connectivity with shallower areas limits the presence of certain species, probably due to the impossibility for these species to migrate directly from shallow to deeper seabed areas. These species are replaced by species with preferences for deeper habitats, providing the fish assemblages located at the top of the summit with a deeper profile than observed in fish assemblages of the continental slope.En prensa2,48

Excitation power dependence of the Purcell effect in photonic crystalmicrocavity lasers with quantum wires

[EN] The Purcell effect dependence on the excitation power is studied in photonic crystal microcavity lasers embedding InAs/InP quantum wires. In the case of non-lasing modes, the Purcell effect has low dependence on the optical pumping, attributable to an exciton dynamics combining free and localized excitons. In the case of lasing modes, the influence of the stimulated emission makes ambiguous the determination of the Purcell factor. We have found that this ambiguity can be avoided by measuring the dependence of the decay time on the excitation power. These results provide insights in the determination of the Purcell factor in microcavity lasers.We want to acknowledge financial support from the Spanish MICINN through grants (Nos. S-0505-TIC-0191, TEC2008-06756-C03-01/-03, TEC2011-29045-C04-03, TEC2011-29120-C05-01/04, and CAM S2009ESP-1503). J.C.-F. thanks the Spanish MCI for his FPI grant (No. BES-2006-12300).Canet-Ferrer, J.; Prieto, I.; Muñoz Matutano, G.; Martínez, L.; Muñoz-Camuniez, L.; Llorens, J.; Fuster, D.... (2013). Excitation power dependence of the Purcell effect in photonic crystalmicrocavity lasers with quantum wires. Applied Physics Letters. 102(20). https://doi.org/10.1063/1.4807439S10220Gérard, J., Sermage, B., Gayral, B., Legrand, B., Costard, E., & Thierry-Mieg, V. (1998). Enhanced Spontaneous Emission by Quantum Boxes in a Monolithic Optical Microcavity. Physical Review Letters, 81(5), 1110-1113. doi:10.1103/physrevlett.81.1110Englund, D., Fattal, D., Waks, E., Solomon, G., Zhang, B., Nakaoka, T., … Vučković, J. (2005). Controlling the Spontaneous Emission Rate of Single Quantum Dots in a Two-Dimensional Photonic Crystal. Physical Review Letters, 95(1). doi:10.1103/physrevlett.95.013904Munsch, M., Mosset, A., Auffèves, A., Seidelin, S., Poizat, J. P., Gérard, J.-M., … Senellart, P. (2009). Continuous-wave versus time-resolved measurements of Purcell factors for quantum dots in semiconductor microcavities. Physical Review B, 80(11). doi:10.1103/physrevb.80.115312Yoshie, T., Scherer, A., Hendrickson, J., Khitrova, G., Gibbs, H. M., Rupper, G., … Deppe, D. G. (2004). Vacuum Rabi splitting with a single quantum dot in a photonic crystal nanocavity. Nature, 432(7014), 200-203. doi:10.1038/nature03119Badolato, A. (2005). Deterministic Coupling of Single Quantum Dots to Single Nanocavity Modes. Science, 308(5725), 1158-1161. doi:10.1126/science.1109815Hennessy, K., Badolato, A., Winger, M., Gerace, D., Atatüre, M., Gulde, S., … Imamoğlu, A. (2007). Quantum nature of a strongly coupled single quantum dot–cavity system. Nature, 445(7130), 896-899. doi:10.1038/nature05586Strauf, S. (2010). Towards efficient quantum sources. Nature Photonics, 4(3), 132-134. doi:10.1038/nphoton.2010.11Altug, H., Englund, D., & Vučković, J. (2006). Ultrafast photonic crystal nanocavity laser. Nature Physics, 2(7), 484-488. doi:10.1038/nphys343Azzini, S., Gerace, D., Galli, M., Sagnes, I., Braive, R., Lemaître, A., … Bajoni, D. (2011). Ultra-low threshold polariton lasing in photonic crystal cavities. Applied Physics Letters, 99(11), 111106. doi:10.1063/1.3638469Nozaki, K., Kita, S., & Baba, T. (2007). Room temperature continuous wave operation and controlled spontaneous emission in ultrasmall photonic crystal nanolaser. Optics Express, 15(12), 7506. doi:10.1364/oe.15.007506Strauf, S., Hennessy, K., Rakher, M. T., Choi, Y.-S., Badolato, A., Andreani, L. C., … Bouwmeester, D. (2006). Self-Tuned Quantum Dot Gain in Photonic Crystal Lasers. Physical Review Letters, 96(12). doi:10.1103/physrevlett.96.127404Kippenberg, T. J., Spillane, S. M., & Vahala, K. J. (2004). Demonstration of ultra-high-Q small mode volume toroid microcavities on a chip. Applied Physics Letters, 85(25), 6113-6115. doi:10.1063/1.1833556Arakawa, Y., & Sakaki, H. (1982). Multidimensional quantum well laser and temperature dependence of its threshold current. Applied Physics Letters, 40(11), 939-941. doi:10.1063/1.92959Kapon, E. (1992). Quantum wire lasers. Proceedings of the IEEE, 80(3), 398-410. doi:10.1109/5.135356Canet-Ferrer, J., Munoz-Matutano, G., Fuster, D., Alen, B., Gonzalez, Y., Gonzalez, L., & Martinez-Pastor, J. P. (2011). Localization effects on recombination dynamics in InAs/InP self-assembled quantum wires emitting at 1.5 μm. Journal of Applied Physics, 110(10), 103502. doi:10.1063/1.3660260Alén, B., Martı́nez-Pastor, J., Garcı́a-Cristobal, A., González, L., & Garcı́a, J. M. (2001). Optical transitions and excitonic recombination in InAs/InP self-assembled quantum wires. Applied Physics Letters, 78(25), 4025-4027. doi:10.1063/1.1379991Cao, M., Daste, P., Miyamoto, Y., Miyake, Y., Nogiwa, S., Arai, S., … Suematsu, Y. (1988). GaInAsP/InP single-quantum-well (SQW) laser with wire-like active region towards quantum wire laser. Electronics Letters, 24(13), 824. doi:10.1049/el:19880561Atlasov, K. A., Calic, M., Karlsson, K. F., Gallo, P., Rudra, A., Dwir, B., & Kapon, E. (2009). Photonic-crystal microcavity laser with site-controlled quantum-wire active medium. Optics Express, 17(20), 18178. doi:10.1364/oe.17.018178Martinez, L. J., Alén, B., Prieto, I., Fuster, D., González, L., González, Y., … Postigo, P. A. (2009). Room temperature continuous wave operation in a photonic crystal microcavity laser with a single layer of InAs/InP self-assembled quantum wires. Optics Express, 17(17), 14993. doi:10.1364/oe.17.014993Mao, M.-H., & Chien, H.-C. (2012). Transient behaviors of current-injection quantum-dot microdisk lasers. Optics Express, 20(3), 3302. doi:10.1364/oe.20.003302Gregersen, N., Suhr, T., Lorke, M., & Mørk, J. (2012). Quantum-dot nano-cavity lasers with Purcell-enhanced stimulated emission. Applied Physics Letters, 100(13), 131107. doi:10.1063/1.3697702Kim, S.-H., Kim, G.-H., Kim, S.-K., Park, H.-G., Lee, Y.-H., & Kim, S.-B. (2004). Characteristics of a stick waveguide resonator in a two-dimensional photonic crystal slab. Journal of Applied Physics, 95(2), 411-416. doi:10.1063/1.1633645Martínez, L. J., Prieto, I., Alén, B., & Postigo, P. A. (2009). Fabrication of high quality factor photonic crystal microcavities in InAsP∕InP membranes combining reactive ion beam etching and reactive ion etching. Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 27(4), 1801. doi:10.1116/1.3151832Canet-Ferrer, J., Martínez, L. J., Prieto, I., Alén, B., Muñoz-Matutano, G., Fuster, D., … Martínez-Pastor, J. P. (2012). Purcell effect in photonic crystal microcavities embedding InAs/InP quantum wires. Optics Express, 20(7), 7901. doi:10.1364/oe.20.007901Alén, B., Fuster, D., Muñoz-Matutano, G., Martínez-Pastor, J., González, Y., Canet-Ferrer, J., & González, L. (2008). Exciton Gas Compression and Metallic Condensation in a Single Semiconductor Quantum Wire. Physical Review Letters, 101(6). doi:10.1103/physrevlett.101.067405Baba, T., & Sano, D. (2003). Low-threshold lasing and purcell effect in microdisk lasers at room temperature. IEEE Journal of Selected Topics in Quantum Electronics, 9(5), 1340-1346. doi:10.1109/jstqe.2003.81946

Discretization of the Region of Interest

[EN]The meccano method was recently introduced to construct simultaneously tetrahedral meshes and volumetric parameterizations of solids. The method requires the information of the solid geometry that is defined by its surface, a meccano, i.e., an outline of the solid defined by connected polyhedral pieces, and a tolerance that fixes the desired approximation of the solid surface. The method builds an adaptive tetrahedral mesh of the solid (physical domain) as a deformation of an appropriate tetrahedral mesh of the meccano (parametric domain). The main stages of the procedure involve an admissible mapping between the meccano and the solid boundaries, the nested Kossaczký’s refinement, and our simultaneous untangling and smoothing algorithm. In this chapter, we focus on the application of the method to build tetrahedral meshes over complex terrain, that is interesting for simulation of environmental processes. A digital elevation map of the terrain, the height of the domain, and the required orography approximation are given as input data. In addition, the geometry of buildings or stacks can be considered. In these applications, we have considered a simple cuboid as meccano.Ministerio de Economía y Competitividad, Gobierno de España; Fondos FEDER; Departamento de Educación, Junta de Castilla y León; CONACYT-SENER, Fondo Sectorial CONACYT SENER HIDROCARBUROS

Effectiveness and safety of first-generation protease inhibitors in clinical practice: Hepatitis C virus patients with advanced fibrosis

AIM: To evaluates the effectiveness and safety of the first generation, NS3/4A protease inhibitors (PIs) in clinical practice against chronic C virus, especially in patients with advanced fibrosis. METHODS: Prospective study and non-experimental analysis of a multicentre cohort of 38 Spanish hospitals that includes patients with chronic hepatitis C genotype 1, treatment-nai¨ve (TN) or treatment-experienced (TE), who underwent triple therapy with the first generation NS3/4A protease inhibitors, boceprevir (BOC) and telaprevir (TVR), in combination with pegylated interferon and ribavirin. The patients were treatment in routine practice settings. Data on the study population and on adverse clinical and virologic effects were compiled during the treatment period and during follow up. RESULTS: One thousand and fifty seven patients were included, 405 (38%) were treated with BOC and 652 (62%) with TVR. Of this total, 30% (n = 319) were TN and the remaining were TE: 28% (n = 298) relapsers, 12% (n = 123) partial responders (PR), 25% (n = 260) null-responders (NR) and for 5% (n = 57) with prior response unknown. The rate of sustained virologic response (SVR) by intention-to-treatment (ITT) was greater in those treated with TVR (65%) than in those treated with BOC (52%) (P < 0.0001), whereas by modified intention-to-treatment (mITT) no were found significant differences. By degree of fibrosis, 56% of patients were F4 and the highest SVR rates were recorded in the non-F4 patients, both TN and TE. In the analysis by groups, the TN patients treated with TVR by ITT showed a higher SVR (P = 0.005). However, by mITT there were no significant differences between BOC and TVR. In the multivariate analysis by mITT, the significant SVR factors were relapsers, IL28B CC and non-F4; the type of treatment (BOC or TVR) was not significant. The lowest SVR values were presented by the F4-NR patients, treated with BOC (46%) or with TVR (45%). 28% of the patients interrupted the treatment, mainly by non-viral response (51%): this outcome was more frequent in the TE than in the TN patients (57% vs 40%, P = 0.01). With respect to severe haematological disorders, neutropaenia was more likely to affect the patients treated with BOC (33% vs 20%, P = 0.0001), and thrombocytopaenia and anaemia, the F4 patients (P = 0.000, P = 0.025, respectively). CONCLUSION: In a real clinical practice setting with a high proportion of patients with advanced fibrosis, effectiveness of first-generation PIs was high except for NR patients, with similar SVR rates being achieved by BOC and TVR

Revista del Consejo Superior de Investigaciones Científicas

Alimentación del meloncillo Herpestes ichneumon y de la gineta Genetta genetta en la Reserva Biológica de Doñana, S.O. de la Península Ibérica.Determinación de la edad en Rana perezi Seoane, 1885. Aplicación al análisis del crecimiento somático de poblaciones.Influencias ambientales en la variación del tamaño, forma y peso de los huevos de la collalba rubia (Oenanthe hispanica L.)Características de un coro de sapos corredores (Bufo calamita) en el sureste de España.Estrategias alimentarias del ciervo (Cervus elaphus L.) en Montes de ToledoDistribución de los quirópteros de la provincia de Orense (Noroeste de España).Ecología trófica del lince ibérico en Doñana durante un periodo secoDesarrollo larvario de la rana común (Rana perezi) (anura: ranidae) en charcas temporales del noroeste de la Península Ibérica.Régimen alimenticio del mirlo común (Turdus merula) en el sureste de la Península Ibérica durante el periodo otoño-invierno.Reproducción del gorrión molinero (Passer montanus) en las Islas Canarias.Relación entre la cobertura vegetal y la distribución de nidos en las colonias de pagaza piconegraPeer reviewe

Neutron cross-sections for advanced nuclear systems : The n-TOF project at CERN

© Owned by the authors, published by EDP Sciences, 2014 This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly citedThe study of neutron-induced reactions is of high relevance in a wide variety of fields, ranging from stellar nucleosynthesis and fundamental nuclear physics to applications of nuclear technology. In nuclear energy, high accuracy neutron data are needed for the development of Generation IV fast reactors and accelerator driven systems, these last aimed specifically at nuclear waste incineration, as well as for research on innovative fuel cycles. In this context, a high luminosity Neutron Time Of Flight facility, n-TOF, is operating at CERN since more than a decade, with the aim of providing new, high accuracy and high resolution neutron cross-sections. Thanks to the features of the neutron beam, a rich experimental program relevant to nuclear technology has been carried out so far. The program will be further expanded in the near future, thanks in particular to a new high-flux experimental area, now under construction.Peer reviewedFinal Published versio

238U(n, γ) reaction cross section measurement with C 6D6 detectors at the n-TOF CERN facility

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly citedThe radiative capture cross section of 238U is very important for the developing of new reactor technologies and the safety of existing ones. Here the preliminary results of the 238U(n,γ) cross section measurement performed at n-TOF with C6D6 scintillation detectors are presented, paying particular attention to data reduction and background subtraction.Peer reviewe