63 research outputs found
morphodynamic response to human activities in the bay of ca diz 2012 2015
The morphology of the Bay of C\'adiz in the southwestern Spain has been changing for the past 25 years in response to the human interventions. Since 2012, new interventions, for example the new terminal and the new navigation channel, have been planned to carry out inside the Bay. As a result of these interventions, there has been a decrease in tidal amplitudes, tidal volumes, and average flow velocities, and there is hardly any sediment transport along the bay. Recent human activities are addressed in the Bay of Cádiz, an estuary located in the south--west of Spain. The Bay of Cádiz is a highly altered embayment in which socio-economical developments and ecological interests conflict. This work studies both through observations and numerical simulations the impact of some of these modifications on the morpho--hydrodynamics of the Bay of Cádiz. The capability of the bay to transport sediment between the inner and outer bay deteriorates after the deepening of the navigation channel and the construction of the new port terminal and the new bridge. This may have an impact on the ecological status of the bay. The influence of the dredging and the new terminal are concentrated at the entrance to the central sector of the bay and close to the channel. The dredging would increase siltation in the shallower areas close to the new channel, which subsequently reduce the amount of sediment input into the basins. The bridge mostly affect the Puntales Channel and the inner bay. The most changes in the erosion/deposition patterns are found in the area with strong bottom frictions and tidal asymmetries
Optimization of olive-fruit paste production using a methodological proposal based on a sensory and objective color analysis
Morphological Transformations of Galaxies in the A901/02 Supercluster from STAGES
We present a study of galaxies in the Abell 901/902 Supercluster at z~0.165,
based on HST ACS F606W, COMBO-17, Spitzer 24um, XMM-Newton X-ray, and
gravitational lensing maps, as part of the STAGES survey. We characterize
galaxies with strong externally-triggered morphological distortions and normal
relatively undisturbed galaxies, using visual classification and quantitative
CAS parameters. We compare normal and distorted galaxies in terms of their
frequency, distribution within the cluster, star formation properties, and
relationship to dark matter (DM) or surface mass density, and intra-cluster
medium (ICM) density. We revisit the morphology density relation, which
postulates a higher fraction of early type galaxies in dense environments, by
considering separately galaxies with a low bulge-to-disk (B/D) ratio and a low
gas content as these two parameters may not be correlated in clusters. We
report here on our preliminary analysis.Comment: To appear in the ASP conference proceedings of the "Frank N. Bash
Symposium 2007: New Horizons in Astronomy", Eds. A. Frebel, J. Maund, J.
Shen, M. Siegel. 4 pages, 4 figure
A VLT VIMOS integral field spectroscopic study of perturbed blue compact galaxies: UM 420 and UM 462
We report on optical integral field spectroscopy of two unrelated blue
compact galaxies mapped with the 13 x 13 arcsec^2 VIMOS integral field unit at
a resolution of 0.33 x 0.33 arcsec^2. Continuum and background subtracted
emission line maps in the light of [O III] 5007, H-alpha, and [N II] 6584 are
presented. Both galaxies display signs of ongoing perturbation and/or
interaction. UM 420 is resolved for the first time to be a merging system
composed of two starbursting components with an 'arm-like' structure associated
with the largest component. UM 462 which is a disrupted system of irregular
morphology is resolved into at least four starbursting regions. Maps of the
H-alpha radial velocity and FWHM are discussed. No underlying broad line region
was detected from either galaxy as the emission lines are well-fitted with
single Gaussian profiles only. Electron temperatures and densities as well as
the abundances of helium, oxygen, nitrogen, and sulphur were computed from
spectra integrated over the whole galaxies and for each area of recent star
formation. Maps of the O/H ratio are presented: these galaxies show oxygen
abundances that are ~20 per cent solar. No evidence of substantial abundance
variations across the galaxies that would point to significant nitrogen or
oxygen self-enrichment is found (<0.2 dex limit). Contrary to previous
observations, this analysis does not support the classification of these BCGs
as Wolf-Rayet galaxies as the characteristic broad emission line features have
not been detected in our spectra. Baldwin-Phillips-Terlevich emission line
ratio diagrams which were constructed on a pixel by pixel basis indicate that
the optical spectra of these systems are predominantly excited by stellar
photoionization.Comment: 19 pages, 14 figure
The histology of ovarian cancer: worldwide distribution and implications for international survival comparisons (CONCORD-2)
Objective Ovarian cancers comprise several histologically distinct tumour groups with widely different prognosis. We aimed to describe the worldwide distribution of ovarian cancer histology and to understand what role this may play in international variation in survival. Methods The CONCORD programme is the largest population-based study of global trends in cancer survival. Data on 681,759 women diagnosed during 1995â\u80\u932009 with cancer of the ovary, fallopian tube, peritoneum and retroperitonum in 51 countries were included. We categorised ovarian tumours into six histological groups, and explored the worldwide distribution of histology. Results During 2005â\u80\u932009, type II epithelial tumours were the most common. The proportion was much higher in Oceania (73.1%), North America (73.0%) and Europe (72.6%) than in Central and South America (65.7%) and Asia (56.1%). By contrast, type I epithelial tumours were more common in Asia (32.5%), compared with only 19.4% in North America. From 1995 to 2009, the proportion of type II epithelial tumours increased from 68.6% to 71.1%, while the proportion of type I epithelial tumours fell from 23.8% to 21.2%. The proportions of germ cell tumours, sex cord-stromal tumours, other specific non-epithelial tumours and tumours of non-specific morphology all remained stable over time. Conclusions The distribution of ovarian cancer histology varies widely worldwide. Type I epithelial, germ cell and sex cord-stromal tumours are generally associated with higher survival than type II tumours, so the proportion of these tumours may influence survival estimates for all ovarian cancers combined. The distribution of histological groups should be considered when comparing survival between countries and regions
Azole-resistance in Aspergillus terreus and related species: An emerging problem or a rare Phenomenon?
Objectives: Invasive mold infections associated with Aspergillus species are a significant cause of mortality in immunocompromised patients. The most frequently occurring aetiological pathogens are members of the Aspergillus section Fumigati followed by members of the section Terrei. The frequency of Aspergillus terreus and related (cryptic) species in clinical specimens, as well as the percentage of azole-resistant strains remains to be studied. Methods: A global set (n = 498) of A. terreus and phenotypically related isolates was molecularly identified (beta-tubulin), tested for antifungal susceptibility against posaconazole, voriconazole, and itraconazole, and resistant phenotypes were correlated with point mutations in the cyp51A gene. Results: The majority of isolates was identified as A. terreus (86.8), followed by A. citrinoterreus (8.4), A. hortai (2.6), A. alabamensis (1.6), A. neoafricanus (0.2), and A. floccosus (0.2). One isolate failed to match a known Aspergillus sp., but was found most closely related to A. alabamensis. According to EUCAST clinical breakpoints azole resistance was detected in 5.4 of all tested isolates, 6.2 of A. terreus sensu stricto (s.s.) were posaconazole-resistant. Posaconazole resistance differed geographically and ranged from 0 in the Czech Republic, Greece, and Turkey to 13.7 in Germany. In contrast, azole resistance among cryptic species was rare 2 out of 66 isolates and was observed only in one A. citrinoterreus and one A. alabamensis isolate. The most affected amino acid position of the Cyp51A gene correlating with the posaconazole resistant phenotype was M217, which was found in the variation M217T and M217V. Conclusions: Aspergillus terreus was most prevalent, followed by A. citrinoterreus. Posaconazole was the most potent drug against A. terreus, but 5.4 of A. terreus sensu stricto showed resistance against this azole. In Austria, Germany, and the United Kingdom posaconazole-resistance in all A. terreus isolates was higher than 10, resistance against voriconazole was rare and absent for itraconazole. © 2018 Zoran, Sartori, Sappl, Aigner, Sánchez-Reus, Rezusta, Chowdhary, Taj-Aldeen, Arendrup, Oliveri, Kontoyiannis, Alastruey-Izquierdo, Lagrou, Cascio, Meis, Buzina, Farina, Drogari-Apiranthitou, Grancini, Tortorano, Willinger, Hamprecht, Johnson, Klingspor, Arsic-Arsenijevic, Cornely, Meletiadis, Prammer, Tullio, Vehreschild, Trovato, Lewis, Segal, Rath, Hamal, Rodriguez-Iglesias, Roilides, Arikan-Akdagli, Chakrabarti, Colombo, Fernández, Martin-Gomez, Badali, Petrikkos, Klimko, Heimann, Uzun, Roudbary, de la Fuente, Houbraken, Risslegger, Lass-Flörl and Lackner
Corrigendum: Azole-resistance in aspergillus terreusand related species: An emerging problem or a rare phenomenon? (Frontiers in Microbiology (2018) 9 (516) DOI: 10.3389/fmicb.2018.00516)
Raquel Sabino was not included as an author in the published article. The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated. © 2019 Zoran, Sartori, Sappl, Aigner, Sánchez-Reus, Rezusta, Chowdhary, Taj-Aldeen, Arendrup, Oliveri, Kontoyiannis, Alastruey-Izquierdo, Lagrou, Lo Cascio, Meis, Buzina, Farina, Drogari-Apiranthitou, Grancini, Tortorano, Willinger, Hamprecht, Johnson, Klingspor, Arsic-Arsenijevic, Cornely, Meletiadis, Prammer, Tullio, Vehreschild, Trovato, Lewis, Segal, Rath, Hamal, Rodriguez-Iglesias, Roilides, Arikan-Akdagli, Chakrabarti, Colombo, Fernández, Martin-Gomez, Badali, Petrikkos, Klimko, Heimann, Uzun, Roudbary, de la Fuente, Houbraken, Risslegger, Sabino, Lass-Flörl and Lackner
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