91 results on '"Córdoba, D."'
Search Results
52. Mantle dynamics beneath the Gibraltar Arc (western Mediterranean) from shear‐wave splitting measurements on a dense seismic array
- Author
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Diaz, J., primary, Gallart, J., additional, Villaseñor, A., additional, Mancilla, F., additional, Pazos, A., additional, Córdoba, D., additional, Pulgar, J. A., additional, Ibarra, P., additional, and Harnafi, M., additional
- Published
- 2010
- Full Text
- View/download PDF
53. Survey explores active tectonics in northeastern Caribbean
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Carbó;, A., primary, Córdoba, D., additional, Muñ Martín, A., additional, Granja, J. L., additional, Dávila, J. Martín, additional, Pazos, A., additional, Catalán, M., additional, Gómez, M., additional, Brink, U. ten, additional, Von Hilldebrandt, C., additional, and Payero, J., additional
- Published
- 2005
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54. Mode of extension and rifting history of upper Tiburón and upper Delfín basins, northern Gulf of California
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González‐Fernández, A., primary, Dañobeitia, J. J., additional, Delgado‐Argote, L. A., additional, Michaud, F., additional, Córdoba, D., additional, and Bartolomé, R., additional
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- 2005
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55. Crustal thinning in the Southwestern Iberia Margin
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González, A., Torné, M., Córdoba, D., Vidal, N., Matias, L. M., Díaz, J., González, A., Torné, M., Córdoba, D., Vidal, N., Matias, L. M., and Díaz, J.
- Abstract
The mode of crustal thinning in the southwestern margin of the Iberian Peninsula is investigated along a transect that extends from onshore Iberia to the eastern end of the Horseshoe Abyssal Plain. On onshore areas, the crustal structure has been deduced using wide-angle seismic reflection data, whereas offshore we have used coincident steep and wide-angle reflection data along a NE-SW oriented seismic profile that extends from Cape San Vicente to the Horseshoe Abyssal Plain. In addition, 2D gravity modelling has been performed to validate the crustal structure deduced from seismic data. Our model results reveal that the crust undergoes a strong but continuous thinning from 31 km onshore Iberia to less than 15 km in the Horseshoe Abyssal Plain and that thinning occurs over horizontal distances of about 120 km.
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- 1996
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56. Crustal transition between continental and oceanic domains along the North Iberian Margin from wide angle seismic and gravity data
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Fernéndez-Viejo, G., primary, Gallart, J., additional, Pulgar, J. A., additional, Gallastegui, J., additional, Dañobeitia, J. J., additional, and Córdoba, D., additional
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- 1998
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57. Seismic energy attenuation in the region between the coast of Guerrero and Mexico City: differences between paths along and perpendicular to the coast
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Cárdenas, M., primary, Núñez-Cornú, F., additional, Lermo, J., additional, Córdoba, D., additional, and González, A., additional
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- 1998
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58. Applicability and reproducibility study of a new adapted on-line nutrition screening tool in pediatrics.
- Author
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de la Rosa, M. Rivero, Gil, J. Íñigo, Fernández, A. Jiménez, Córdoba, D. Bello, Vega, M. Balboa, Caballero, C. Cuadrado, and Reguera, Y. Castillo
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- 2022
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59. Impact of COVID-19 on routine endoscopic activity.
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Rivero de la Rosa, M. C., Bello Córdoba, D., Jimenez Fernandez, A., Cuadrado Caballero, M. C., Balboa Vega, M. J., and Castillo Reguera, Y. M.
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- 2022
- Full Text
- View/download PDF
60. Seismic structure of the northern continental margin of Spain from ESCIN deep seismic profiles
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Alvarez-Marrón, J., primary, Pérez-Estaún, A., additional, Danñobeitia, J.J., additional, Pulgar, J.A., additional, Martínez^Catalán, J.R., additional, Marcos, A., additional, Bastida, F., additional, Ayarza^Arribas, P., additional, Aller, J., additional, Gallart, A., additional, Gonzalez-Lodeiro, F., additional, Banda, E., additional, Comas, M.C., additional, and Córdoba, D., additional
- Published
- 1996
- Full Text
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61. Crustal thinning in the Southwestern Iberia Margin
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González, A., primary, Torné, M., additional, Córdoba, D., additional, Vidal, N., additional, Matias, L. M., additional, and Díaz, J., additional
- Published
- 1996
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62. A deep seismic reflection survey across the Betic Chain (southern Spain): first results
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García-Dueñas, V, primary, Banda, E, additional, Torné, M, additional, and Córdoba, D, additional
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- 1994
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63. A deep seismic sounding investigation of lithospheric heterogeneity and anisotropy beneath the Iberian Peninsula
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Díaz, J., primary, Gallart, J., additional, Córdoba, D., additional, Senos, L., additional, Matias, L., additional, SuriÑach, E., additional, Hirn, A., additional, and Maguire, P., additional
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- 1993
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64. Structure of the crust in the schistose domain of Galicia-Tras-os-Montes (NW Iberian Peninsula)
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Téllez, J., primary, Matias, L.M., additional, Córdoba, D., additional, and Mendes-Victor, L.A., additional
- Published
- 1993
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65. Background Noise Characteristics at the IberArray Broadband Seismic Network.
- Author
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Díaz, J., Villaseñor, A., Morales, J., Pazos, A., Córdoba, D., Pulgar, J., García-Lobón, J. L., Harnafi, M., Carbonell, R., and Gallart, J.
- Subjects
SEISMIC networks ,MICROSEISMS ,SPECTRAL energy distribution ,DENSITY functionals - Abstract
The characteristics of the background seismic noise recorded at the IberArray broadband seismic network have been analyzed using power spectral density estimates and their corresponding probability density functions (PDFs). The network is composed of 55 stations that have been deployed in southern Iberia and northern Morocco beginning in the summer of 2007. PDFs provide a useful tool for monitoring the network performance, allowing identification of stations with anomalously high noise levels. They can also be used to investigate the major sources of noise at different frequency bands and the seismic background noise variations related to time of day, season, weather, location, and type of installation. At high frequencies (> 1 Hz), the main contribution seems to arise from the cultural noise, and therefore significant variations are observed between noise levels at different stations based on proximity to populated areas. At microseismic frequencies (0.05-1 Hz), the noise level is more uniform among stations, although sites along the Gulf of Cádiz show a slightly increased level. At long periods, the vertical component noise level usually lies 15 dB above the new low-noise model and the horizontal components are much noisier, sometimes exceeding the new high-noise model for periods longer than 20 sec. Infragravity waves can be identified along the network for periods close to 100 sec, even for stations located inland. The distribution of the median noise levels across the IberArray network shows a clear correlation with major geological features, such as the Guadalquivir and Gharb sedimentary basins, where noise is high, and the Iberian Massif where the noise levels are lowest. Among the main temporal variations observed we can highlight the diurnal differences in the noise level, particularly significant for high frequencies, and the noise level variations correlated to the significant wave heights in the surrounding water bodies. [ABSTRACT FROM AUTHOR]
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- 2010
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66. Jardín de nobles doncellas.
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Martin de Córdoba, d. ca. 1476., Martin de Córdoba, d. ca. 1476., Martin de Córdoba, d. ca. 1476., and Martin de Córdoba, d. ca. 1476.
- Abstract
282 p. 20 cm., Includes bibliographical references., (dlps) ATC3215.0001.001, (lccallno) 868 M379362ja, http://quod.lib.umich.edu/t/text/accesspolicy.html
- Published
- 1956
67. Structure of the Middle America trench in Oaxaca, Mexico
- Author
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Nava, F., Núñez-Cornú, F., Córdoba, D., Mena, M., Ansorge, J., González, J., Rodríguez, M., Banda, E., Mueller, S., Udías, A., García-García, M., and Calderón, G.
- Abstract
Deep seismic profiling was carried out in south and central Oaxaca as a multinational (Mexico, Spain and Switzerland) project. Sixteen sea-bottom explosions, ranging from 20 to 1000 kg were recorded by thirty portable instruments along three profiles, two along the coast and one going inland in an approximate N-S direction.
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- 1988
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68. The Hercynian crust in northwestern Spain: a seismic survey
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Córdoba, D., Banda, E., and Ansorge, J.
- Abstract
In summer 1982 a network of crustal seismic profiles was established in NW Spain with shotpoints at sea and on land. Some profiles were designed to capture the general features of the crust whereas others were aimed at resolving the detailed structure of specific geological features. The interpretation of three profiles aimed at the most important features of the earth's crust in northwest Spain is discussed here. The crust consists of three layers with compressional velocities of 6.0–6.1 km/s, 6.2–6.3 km/s and 6.7–6.9 km/s. The thicknesses of these layers vary laterally, the average values under the central part of Galicia being 13 km, 8 km and 10 km. The fine structure of the lower crust has still to be determined. So far, lateral variations in the velocity structure of the lower crust from a constant velocity layer to a gradient layer have been detected along the main profile from NE to SW over a distance of 250 km. The Moho discontinuity is reached at 30–32 km in the central part of the surveyed area: this decreases to 23–27 km to the north and to the west. On the basis of P MP amplitudes, the Moho seems to be rather sharp.
- Published
- 1987
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69. Sobre la existencia de dos cuñas de corteza en Galicia oriental según resultados de sísmica profunda. Implicaciones geodinámicas
- Author
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Vegas, Ramón and Córdoba, D.
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NW Iberian Massif ,Deep seisme data ,Crustal wedges ,Sismología ,Geodynamic model ,Granulites - Abstract
A silice of granulites has been interpreted from deep seismic sounding data at a depth of 8 km in eastern Galicia (NW Spain). This leads to the definition of the sole Hercynian thrust and two different crustal wedges that result from the asymmetrical shortening of the continental crust, Se ha interpretado una sílice de granulitas a partir de datos de un sondeo sísmico a una profundidad de 8 km al este de Galicia (NO de España). Esto nos lleva a la definición de la huella del cabalgamiento Herciniano, y dos cuñas de corteza diferentes que resultan del acortamiento asimétrico de la corteza continental.
- Published
- 1988
70. Estudio sobre el criseano 1
- Author
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Arias P., Hernando and Córdoba D., Fabio
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lcsh:Chemistry ,Tiazoles ,lcsh:QD1-999 ,Criseano ,Química ,Revisiones bibliográficas - Abstract
El presente trabajo fué iniciado originalmente como una curiosidad de laboratorio. La síntesis y propiedades investigadas posteriormente surgieron a medida que avanzaba el trabajo. Una búsqueda completaen el Chemical Abstracts desde el año 1907 hasta el presente, nos ha llevado a encontrar solo unas 8 citas bibliográficas, algunas de ellas no dirigidas específicamente a nuestro compuesto, sino en forma muygeneral al estudio de los tiazoles. (Véase revisión bibliográfica).
- Published
- 1972
71. Survey explores active tectonics in Northeastern Caribbean
- Author
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Carbó, A., Córdoba, D., Dávila, J. M., Ten Brink, U., Herranz, P., Hilldebrandt, C., Payero, J., Martín, A. M., Pazos, A., Catalán, M., JOSE-LUIS GRANJA-BRUÑA, and Gómez, M.
- Subjects
Geodinámica ,Geofísica - Abstract
There is renewed interest in studying the active and complex northeastern Caribbean plate boundary to better understand subduction zone processes and for earthquake and tsunami hazard assessments [e.g., ten Brink and Lin, 2004; ten Brink et al., 2004; Grindlay et al, 2005]. To study the active tectonics of this plate boundary, the GEOPRICO-DO (Geological, Puerto Rico-Dominican) marine geophysical cruise, carried out between 28 March and 17 April 2005 (Figure 1), studied the active tectonics of this plate boundary. Initial findings from the cruise have revealed a large underwater landslide, and active faults on the seafloor (Figures 2a and 2c). These findings indicate that the islands within this region face a high risk from tsunami hazards, and that local governments should be alerted in order to develop and coordinate possible mitigation strategies. The cruise collected multibeam bathymetry, gravity, magnetic, high-resolution seismic, deep seismic sounding, and multichannel seismic reflection data, which are currently being processed and interpreted (Table 1). In early November 2005, 10 ocean-bottom seismometers (OBS) that had been deployed northeast of Puerto Rico and the Virgin Islands (Figure 1) during the cruise were recovered. These OBS recorded data during the cruise and the local seismicity between April and October 2005.
72. Crustal architecture and tectonic evolution of the Gulf of Cadiz (SW Iberian margin) at the convergence of the Eurasian and African plates
- Author
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Gràcia, E., Danobeitia, J., Jaume Vergés, Bartolomé, R., and Córdoba, D.
- Abstract
19 pages, 13 figures, The Gulf of Cadiz, located at the southwestern Iberian margin, is characterized by widespread seismicity, compressional and strike-slip fault plane solutions and by a large, elongated positive free-air gravity anomaly, the Gulf of Cadiz Gravity High (GCGH). Multichannel seismic profiles across and along GCGH, together with bathymetric and gravity data, allow us to study in detail the tectonic architecture and crustal structure of the Gulf of Cadiz. The upper shelf and slope of the Gulf of Cadiz includes the main structural domains of the Betic fold and thrust belt. In the middle part of the Gulf, the Paleozoic basement crops out on the shallow Guadalquivir Bank and is associated with the largest signature of the GCGH, whereas toward the outer part of the Gulf, the basement deepens progressively. A large NW-SE normal fault and conjugate NE-SW faults define a prominent basement high associated with the GCGH. Modeling of the GCGH suggests localized crustal thinning of 10 km along the central part of the Gulf of Cadiz, probably generated during the Mesozoic rifting episode between the Iberian and African plates. Concentric wedges of fold and thrust belts and large allochthonous masses were emplaced in the Gulf of Cadiz during the Neogene compressional phase. The final emplacement of these units becomes progressively young from the SE (pre-early Langhian) toward the foreland in the NW (late Tortonian). Seafloor surface ruptures, pockmarks, and submarine landslides provide evidence of active faulting in the Gulf of Cadiz. To accommodate the present-day convergence between the African and Eurasian plates, previously extensional faults have probably been reactivated and inverted at depth, as suggested by the intermediate depth seismicity, The authors are grateful for funding from the European Commission project BIGSETS (ENV4-CT97-0547), Spanish national projects MAIAE (MAR98-0962), SENSUAL (REN2000-1016-C02-MAR), MARSIBAL (REN2001-3868-C02-MAR) Comissionat per a Universitats i Recerca - Generalitat de Catalunya, Ministerio de Educación y Cultura and Ministerio de Ciencia y Tecnología (to E. Gràcia), and NATO grant EST.CLG.978922 (to J. Vergés)
73. Seismic image of the Cantabrian Mountains in the western extension of the Pyrenees from integrated ESCIN reflection and refraction data
- Author
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Pulgar, J. A., Gallart, J., Fernandez-Viejo, G., Perez-Estaun, A., Joaquina Alvarez-Marron, Alonso, J. L., Gallastegui, J., Marcos, A., Bastida, F., Aller, J., Farias, P., Marín, J., García-Espina, R., Martínez-Catalán, J. R., Comas, M. C., Banda, E., Dańobeitia, J. J., Córdoba, D., Heredia, N., and Rodríguez, R.
74. P-wave velocity-depth distribution in the Hercynian crust of northwest Spain
- Author
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Córdoba, D., primary, Banda, E., additional, and Ansorge, J., additional
- Published
- 1988
- Full Text
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75. Structure of the crust and upper mantle beneath the Balearic Islands (Western Mediterranean)
- Author
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Banda, E., primary, Ansorge, J., additional, Boloix, M., additional, and Córdoba, D., additional
- Published
- 1980
- Full Text
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76. Seismic investigation of the continental margin off- and onshore Valparaiso, Chile
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Flueh, E.R., Vidal, N., Ranero, C.R., Hojka, A., von Huene, R., Bialas, J., Hinz, K., Cordoba, D., Dan˜obeitia, J.J., and Zelt, C.
- Published
- 1998
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77. Effectiveness of deep brain stimulation on refractory aggression in pediatric patients with autism and severe intellectual disability: meta-analytic review.
- Author
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Herrera-Pino J, Benedetti-Isaac J, Ripoll-Córdoba D, Camargo L, Castillo-Tamara EE, Morales-Asencio B, Perea-Castro E, Torres Zambrano M, Ducassou A, Flórez Y, Porto MF, Gargiulo PA, Zurita-Cueva B, Caldichoury N, Coronado JC, Castellanos C, Ramírez-Penso C, and López N
- Subjects
- Humans, Child, Adolescent, Autistic Disorder therapy, Treatment Outcome, Deep Brain Stimulation methods, Aggression, Intellectual Disability therapy
- Abstract
Some patients with autism and severe intellectual disability may experience uncontrolled aggression, causing serious injury or harm to others, and the therapeutic ineffectiveness of traditional pharmacological and behavioral treatment may aggravate symptoms. Deep brain stimulation (DBS) has been tested in patients with little evidence in children and adolescents. Therefore, we analyzed the efficacy and safety of DBS in refractory aggression in pediatric subjects with autism (ASD) and severe intelligence deficit (ID).Methods A meta-analytic review of Web of Science (WOS) and Scopus articles, following Prisma criteria. A total of 555 articles were identified, but after applying the inclusion criteria, only 18 were analyzed. The review of the registries and the extraction of information was performed by 2 independent groups, to reduce the evaluator's bias. For the description of the results, pediatric patients with ASD or ID present in each registry, with an application of specialized scales (Overt aggression scale, OAS, and THE modified version of the OAS, MOAS) pre and post-DBS, with a clinical follow-up of at least 12 months, were considered valid. Clinical improvement was calculated using tests of aggressiveness. In each registry with available data and then pooling the means of all patients in the OAS and MOAS, the effect size of DBS (overall and per study) was estimated. Finally, the adapted NOS scale was applied to rate the studies' quality and level of bias.Results In the studies analyzed, 65/100 were pediatric patients, with a mean age of 16.8 years. Most of the studies were conducted in South America and Europe. In all teams, aggressive behavior was intractable, but only 9 groups (53/65) applied specialized scales to measure aggressiveness, and of these, only 51 subjects had a follow-up of at least 12 months. Thus, in 48/51 a clinical improvement of patients was estimated (94.2%), with a considerable overall effect size (OAS: d = 4.32; MOAS: d = 1.46). However, adverse effects and complications were found in 13/65 subjects undergoing DBS. The brain target with the most evidence and the fewest side effects was the posteromedial hypothalamic nuclei (pHypN). Finally, applying the adapted NOS scale, quality, and bias, only 9 studies show the best indicators.Conclusion An optimal level of efficacy was found in only half of the publications. This is mainly due to design errors and irrelevant information in the reports. We believe that DBS in intractable aggressiveness in children and adolescents with ASD and severe ID can be safe and effective if working groups apply rigorous criteria for patient selection, interdisciplinary assessments, objective scales for aggressiveness, and known surgical targets., (© 2024. The Author(s).)
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- 2024
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78. Operando detection and suppression of spurious singlet oxygen in Li-O 2 batteries.
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Córdoba D, Benavides LN, Murgida DH, Rodríguez HB, and Calvo EJ
- Abstract
The rechargeable lithium air (oxygen) battery (Li-O
2 ) has very high energy density, comparable to that of fossil fuels (∼3600 W h kg-1 ). However, the parasitic reactions of the O2 reduction products with solvent and electrolyte lead to capacity fading and poor cyclability. During the oxygen reduction reaction (ORR) in aprotic solvents, the superoxide radical anion (O2 ˙- ) is the main one-electron reaction product, which in the presence of Li+ ions undergoes disproportionation to yield Li2 O2 and O2 , a fraction of which results in singlet oxygen (1 O2 ). The very reactive1 O2 is responsible for the spurious reactions that lead to high charging overpotential and short cycle life due to solvent and electrolyte degradation. Several techniques have been used for the detection and suppression of1 O2 inside a Li-O2 battery under operation and to test the efficiency and electrochemical stability of different physical quenchers of1 O2 : azide anions, 1,4-diazabicyclo[2.2.2]octane (DABCO) and triphenylamine (TPA) in different solvents (dimethyl sulfoxide (DMSO), diglyme and tetraglyme). Operando detection of1 O2 inside the battery was accomplished by following dimethylanthracene fluorescence quenching using a bifurcated optical fiber in front-face mode through a quartz window in the battery. Differential oxygen-pressure measurements during charge-discharge cycles vs. charge during battery operation showed that the number of electrons per oxygen molecule was n > 2 in the absence of physical quenchers of1 O2 , due to spurious reactions, and n = 2 in the presence of physical quenchers of1 O2 , proving the suppression of spurious reactions. Battery cycling at a limited specific capacity of 500 mA h gC -1 for the MWCNT cathode and 250 mA gC -1 current density, in the absence and presence of a physical quencher or a physical quencher plus the redox mediator I3 - /I- (with a lithiated Nafion® membrane), showed increasing cyclability according to coulombic efficiency and cell voltage data over 100 cycles. Operando Raman studies with a quartz window at the bottom of the battery allowed detection of Li2 O2 and excess I3 - redox mediator during discharge and charge, respectively.- Published
- 2024
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79. The Longitudinal Changes in Subcutaneous Abdominal Tissue and Visceral Adipose Tissue Volumetries Are Associated with Iron Status.
- Author
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Hinojosa-Moscoso A, Motger-Albertí A, De la Calle-Vargas E, Martí-Navas M, Biarnés C, Arnoriaga-Rodríguez M, Blasco G, Puig J, Luque-Córdoba D, Priego-Capote F, Moreno-Navarrete JM, and Fernández-Real JM
- Subjects
- Female, Humans, Adipose Tissue, Cross-Sectional Studies, Hepcidins, Obesity complications, Prospective Studies, Subcutaneous Fat, Insulin Resistance, Intra-Abdominal Fat, Iron metabolism
- Abstract
Excess iron is known to trigger adipose tissue dysfunction and insulin resistance. Circulating markers of iron status have been associated with obesity and adipose tissue in cross-sectional studies. We aimed to evaluate whether iron status is linked to changes in abdominal adipose tissue longitudinally. Subcutaneous abdominal tissue (SAT) and visceral adipose tissue (VAT) and its quotient (pSAT) were assessed using magnetic resonance imaging (MRI), at baseline and after one year of follow-up, in 131 (79 in follow-up) apparently healthy subjects, with and without obesity. Insulin sensitivity (euglycemic- hyperinsulinemic clamp) and markers of iron status were also evaluated. Baseline serum hepcidin ( p = 0.005 and p = 0.002) and ferritin ( p = 0.02 and p = 0.01)) were associated with an increase in VAT and SAT over one year in all subjects, while serum transferrin ( p = 0.01 and p = 0.03) and total iron-binding capacity ( p = 0.02 and p = 0.04) were negatively associated. These associations were mainly observed in women and in subjects without obesity, and were independent of insulin sensitivity. After controlling for age and sex, serum hepcidin was significantly associated with changes in subcutaneous abdominal tissue index (iSAT) (β = 0.406, p = 0.007) and visceral adipose tissue index (iVAT) (β = 0.306, p = 0.04), while changes in insulin sensitivity (β = 0.287, p = 0.03) and fasting triglycerides (β = -0.285, p = 0.03) were associated with changes in pSAT. These data indicated that serum hepcidin are associated with longitudinal changes in SAT and VAT, independently of insulin sensitivity. This would be the first prospective study evaluating the redistribution of fat according to iron status and chronic inflammation.
- Published
- 2023
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80. Feasibility and Acceptability of an Online Family Literacy Program in an Under-Resourced Community During the COVID-19 Pandemic.
- Author
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Choi Y, Uthirasamy N, Córdoba D, Morrow LM, Perez-Cortes S, Ramachandran U, Pai S, Lima D, Shelton PA, and Jimenez ME
- Subjects
- Humans, Pandemics, Feasibility Studies, Pilot Projects, Parents, COVID-19
- Abstract
Objective: The objective of this study was to examine the feasibility and acceptability of an online family literacy program (FLP) among low-income Latino families during the COVID-19 pandemic., Methods: We conducted a mixed methods pilot study. Latino parent-child dyads participated in an 8-week online FLP conducted on video conferencing software, developed through a cross-sector health care-education partnership. We conducted surveys and structured observation to assess feasibility and acceptability and in-depth interviews to gain insight into the context of participants' experiences during the pandemic., Results: The 35 participating parent-child dyads all identified as Latino, 83% reported limited English proficiency, and 60% of parents did not achieve a high school diploma. Nearly two-thirds of families participated in at least half of the sessions. On average, parents welcomed, liked, approved, and found the program appealing. While 86% experienced a technology problem at least once during sessions, all were resolved with minimal assistance. During qualitative interviews, we identified 3 themes that provide insight into their experiences with the FLP within the broader context of the pandemic: (1) disruption in family routine and financial strain caused by COVID-19 intensified family stress, (2) the forced transition to remote learning highlighted the inequities experienced by Latino preschool children, and (3) the FLP empowered parents and enhanced health and education experiences., Conclusion: Latino families had high participation levels in an online FLP and found it acceptable. Additional work is needed to understand how similar primary care programs can be leveraged to promote optimal development during a time of heightened need., (Copyright © 2023 Wolters Kluwer Health, Inc. All rights reserved.)
- Published
- 2023
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81. [Prevalence and factors associated with subjective cognitive complaints in Latin American health workers during the COVID-19 pandemic].
- Author
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Soto-Añari M, Rivera-Fernández C, Ramos-Vargas L, Denegri-Solis L, Herrera-Pino J, Camargo L, Castillo E, Díaz M, Gaitán-Quintero G, Alonso M, Cárdenas O, Pabon-Moreno A, Caldichoury N, Ramos-Henderson M, Florez Y, Escorcia-Villarreal J, Ripoll-Córdoba D, Quispe-Ayala C, Gargiulo PA, Porto MF, and López N
- Abstract
Background and objectives: An increase in emotional disturbances and complaints about cognitive performance has been observed in Latin American healthcare workers during the SARS-CoV-2 pandemic, which can affect attention capacity and increase the levels of stress and burnout of these professionals. The objective was to analyse subjective cognitive complaints (SCC) and associated factors in health personnel during the COVID-19 pandemic in five Latin American countries. Methods: Multicentre cross-sectional study, which included 3,738 professionals from Colombia, Chile, Argentina, Ecuador, Bolivia, and Peru. The Generalized Anxiety Disorder Scale (GAD-7) and the Patient Health Questionnaire (PHQ-9) was used to assess depression, and the Mini-Z to assess Burnout. For the SCC, an item on cognitive concerns in attention and memory was used. Results: The prevalence of cognitive complaints was 69.2%. The factors associated with a higher risk of SCC were the scores in the GAD-7, PHQ and Mini-Z, in addition to being part of the Ecuadorian health personnel. Conclusions: There is a high prevalence of SCC in health personnel, which is modulated by emotional states and stress., (© 2022 Asociación Colombiana de Psiquiatría. Published by Elsevier España, S.L.U. All rights reserved.)
- Published
- 2022
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82. Point-of-Care Ultrasound in Acute Care Nephrology.
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Karakala N, Córdoba D, Chandrashekar K, Lopez-Ruiz A, and Juncos LA
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- Humans, Nephrologists, Point-of-Care Testing, Ultrasonography, Nephrology, Point-of-Care Systems
- Abstract
The use of point-of-care ultrasound (POCUS) is rapidly increasing in nephrology. It provides the opportunity to obtain complementary information that is more accurate than the classic physical examination. One can quickly follow the physical examination with a systematic POCUS evaluation of the kidneys, ureter bladder, inferior vena cava, heart, and lungs, which can provide diagnostic information and an accurate assessment of the patient's hemodynamics and volume status. Moreover, because it is safe and relatively easy to perform, it can be performed in a repeated manner as often as necessary so that the physician can reassess the patient's hemodynamics and volume status and adjust their therapy accordingly, permitting a more personalized approach to patient care (rather than blindly following protocols), especially to patients in acute care nephrology. Despite these advantages, nephrologists have been slow to adopt this diagnostic modality, perhaps because of lack of expertise. This review will provide an overview of the most commonly used POCUS examinations performed by nephrologists in the acute care setting. Its aim is to spark interest in in POCUS and to lay the foundation for readers to pursue more advanced training so that POCUS becomes a readily available tool in your diagnostic arsenal., (Copyright © 2021 National Kidney Foundation, Inc. Published by Elsevier Inc. All rights reserved.)
- Published
- 2021
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83. NEOTROPICAL ALIEN MAMMALS: a data set of occurrence and abundance of alien mammals in the Neotropics.
- Author
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Rosa CAD, Ribeiro BR, Bejarano V, Puertas FH, Bocchiglieri A, Barbosa ALDS, Chiarello AG, Paglia AP, Pereira AA, Moreira AFS, Souza AC, Pellegrin A, Gatica A, Medeiro AZ, Pereira AD, Braz AG, Yanosky A, Valenzuela AEJ, Bertassoni A, Prado ADSVD, Nava AFD, Rocha A, Bovo AAA, Bager A, Cravino A, Pires ADS, Martensen AC, Filippini A, Percequillo AR, Vogliotti A, Antunes AZ, Leite de Oliveira AC, da Silva de Oliveira AJ, Devlin A, de Paula A, Ferreira AS, García-Olaechea A, Subalusky A, Sánchez A, de Aquino ACMM, Srbek-Araujo AC, Paldês Gonçales A, Araújo ACL, Gozzi AC, Ochoa AC, Mendes de Oliveira AC, Lacerda ACR, Francisco AK, Paschoal AMO, Gomes APN, Potrich AP, Olímpio APM, Rojas A, Meiga AYY, Jácomo ATA, Calaça AM, Feijó A, Pagoto A, Borja Miranda A, Chein Alonso A, Barreto-Lima AF, Lanna A, Luza AL, Camilo AR, Tavares A, Nunes AV, Kindel A, de Miguel A, Gatti A, Nobre AB, Campêlo ADC, Albuquerque ACF, de la Torre A, Mangione A, Mendes Pontes AR, Fernandes AS, Felicio ALA, Ferreguetti AC, Marcili A, Piratelli AJ, Nascimento AGSD, Banhos Dos Santos Á, Rosa BF, Cezila BA, de Thoisy B, Ingberman B, Köhler B, Morais BC, Gómez-Valencia B, Bertagni de Camargo B, Bezerra BM, Tamasauskas B, Parahyba Campos BAT, Kubiak BB, Saranholi BH, Nakagawa BK, Leles BP, Lim BK, Pereira Mendes C, Islas CA, Aoki C, Cantagallo Devids C, Figueiredo C, Abreu CMG, Silva Oliveira CR, Cassano CR, Lugarini C, Caputo C, Gestich CC, Tedesco CD, Vera Y Conde CF, Hegel CGZ, Kasper CB, De Angelo C, Grelle CEV, Fragoso CE, Esbérard CEL, Rocha CFD, Verona CE, Salvador CH, Vieira CL, Abrahão CR, Brocardo CR, Fieker CZ, Braga C, Sánchez Lalinde C, Bueno C, Ikuta CY, Luna CLB, Cestari C, Del Vechio Koike C, Knogge C, Anderson CB, Hurtado CM, Ferreira Antunes de Oliveira C, Tellaeche C, Cesário CS, Costa CG, Kanda CZ, Costa SA, Seixas CS, Trinca CT, López-Fuerte CF, da Cunha CJ, Doutel Ribas C, Santos CC, Buscariol D, Carreira D, Nascimento DCD, Carvalho DR, Ferraz DDS, Galiano D, Homem DH, Jesús-Espinosa D, Bôlla DAS, Moreno DJ, Moreira DO, Ramos DL, de Amorim DA, Barros-Battesti DM, Lopez DE, Tavares DC, Post DM, Couto DR, Patrocínio DN, Carvalho DLKP, Silva DA, Córdoba D, Queirolo D, Varela D, de Oliveira DAG, Casanova DC, Dias DM, Machado da Silva D, Barbier E, Rivadeneira EF, Alexandrino E, Carrano E, Santos EM, Venticinque EM, Hernández-Pérez E, Casazza EDF, Anderson EP, Fraga EDC, de Lima EF, D'Bastiani E, Vieira EM, Guijosa-Guadarrama E, González EM, Maggiorini EV, Aguiar EFS, Martínez-Nambo ED, Castro ÉP, de la Peña-Cuéllar E, Pedó E, Melo FCSA, Rocha FL, Fonseca FL, Girardi F, Melo FR, Roque FO, Keesen Ferreira F, Peters FB, Moreli Fantacini F, Pedrosa F, Pessoa da Silva F, Vélez-García F, Abra FD, de Azevedo FC, Guedes da Silva F, Neri FM, Teixeira FZ, Fernandez FADS, Carvalho F, Passos FC, Jacinavicius FC, Ferreira F, Pinho FF, Gonçalves F, Ibanez Martins F, Lima F, Contreras-Moreno FM, Ribeiro FS, Tortato F, Patel FM, Caruso F, Tirelli FP, Rodrigues FHG, Ubaid FK, Palmeira FBL, Grotta Neto F, Gabriel FH, de Souza FL, Costa FEDVD, de Aguiar GL, Lemos FG, Magezi GS, Panigai GFVD, Hofmann GS, Heliodoro G, Rosa Graviola G, Beca G, Andrade GR, Jiménez Romero G, Duarte GT, Melo GL, Dierings GL, Sabino-Santos G Jr, de Oliveira GL, Santana GG, Ciocheti G, Zanirato GL, Alves GB, Batista GO, Behling GM, Ferreira GB, da Rocha GC, Lessa G, Mourão G, Maras GA, Toledo GADC, Gonsioroski G, Canale GR, Schuchmann KL, Sebastião H, Alves do Prado H, Bergallo HG, Secco HKC, Roig HL, Rajão H, Carlos HSA, Duarte HOB, Ermenegildo H, Pena HFJ, Entringer Júnior H, Paulino Neto HF, Lemos HM, Del Castillo H, Fernandes-Ferreira H, Coitiño Banquero HI, Roesler I, Ribeiro IK, Coelho IP, Lima IMS, Bechara IM, Lermen IS, Mella Méndez I, Schuck G, Esperandio IB, Silva IO, Mourthe I, Oliveira I, Bernardi IP, Miller JR, Marinho-Filho J, Zocche JJ, Russell JC, Seibert JB, Hinojosa J, Vitule JRS, Thompson JJ, Silva JCR, Gouvea JA, Santos JP, Falcão JCF, Castro-Prieto J, Ferreira JP, Pincheira-Ulbrich J, Nodari JZ, Zecchini Gebin JC, Giovanelli JGR, Miranda JMD, Souza-Alves JP, Marins JRGA, Costa JF, Sponchiado J, de Souza JL, Gallo JA, Cherem JJ, Cordeiro JLP, Duarte JMB, Dantas JO, de Matos JR, Pires JSR, Martínez Lanfranco JA, de la Cruz Godoy JC, Rudolf JC, Parrish JFR, Tellarini JF, Peña-Mondragón JL, Arrabal JP, Reppucci J, Ruiz-Esparza J, Beduschi J, Oshima JEF, Ribeiro JF, Almeida Rocha JM, Ferreira Neto JS, Silveira Dos Santos J, Pereira-Ribeiro J, Zanoni JB, Bogoni JA, Ferreira JR, Bicca-Marques JC, Chacón Pacheco JJ, Scarascia PO, Guidoni-Martins KG, Burs K, Ferraz KMPMB, Pisciotta KR, Silva KVKA, Juarez KM, de la Cruz-Félix K, de Morais KDR, Candelária LP, Fornitano L, Bailey LL, Gonçalves LO, Fasola L, Nova León LJ, de Andrade LR, Marques LO, Macedo L, Moreira LS, Silveira L, Oliveira LC, da Silva LH, Jerusalinsky L, La Serra L, Marques Costa L, Sartorello LR, Munhoes LP, Oliveira-Silva LRB, de Pina LF, Bonjorne L, Rampim LE, Sales LP, Gonçalves da Silva L, Quintilham LLT, Perillo LN, Rodríguez-Planes LI, Martín L, Araújo LS, Tiepolo LM, Zago Silva L, García Loaiza LM, Querido LCA, da Silva LF, La Sala LF, Bopp LT, Hufnagel L, Oliveira LFB, Oliveira-Santos LGR, Lyra LH, Guimarães LN, Jimenez Segura LF, de Sousa LC, Möcklinghoff L, Guichón ML, de la Maza J, Barrios-Garcia MN, Talamoni SA, Severo MM, Martins MZA, Oliveira MA, Figuerêdo Duarte Moraes M, Lima MGM, Soares Pinheiro M, Pônzio MDC, Guerreiro M, Cervini M, da Silva M, Oliveira MJR, Magioli M, Passamani M, Silva de Almeida M, Amaku M, Leite de Oliveira M, Tortato MA, Melo MA, Coutinho ME, Dantas Santos MP, Vieira MV, Andrade MA, Barros MC, Rosario MCFD, Domit MDADS, Fernandes MEA, Iezzi ME, do Nascimento MHS, Andrade-Núñez MJ, Lorini ML, Morini MSC, Nagy-Reis MB, Landis MB, Vale MM, Xavier MS, Kaizer MC, Baptiste MP, Bergel MM, Borgnia M, Barros MAS, Lima da Silva M, Favarini MO, Sales Munerato M, Zaluar MT, Winter M, Xavier da Silva M, Zanin M, Marques MI, Haberfeld MB, Di Bitetti MS, Galliez M, Alvarez MR, Malerba M, Rivero M, Melo Dias M, de Oliveira MY, Dos Reis MG, Corrêa MRJ, Graipel ME, Godoi MN, Núñez-Regueiro MM, Moura MO, Orsi ML, Galvão da Silva MA, Sanvicente Lopez M, Benedetti MA, Beltrão MG, Camino M, Faria MB, Miretzki M, Luiz MR, Perine M, Monteiro MCM, Alves-Eigenheer M, Perilli MLL, da Silva MA, Marini MÂ, Silva Pereira M, de Freitas Junior MC, Cossa N, Denkiewicz NM, Tôrres NM, Olifiers N, de Albuquerque NM, Canassa NF, Detogne N, Gurgel Filho N, Seoane NF, da Rosa Oliveira N, Megale N, Pasqualotto N, Cáceres NC, Peroni N, Zanella N, Pays O, Arimoro OAS, Acevedo-Charry O, de Almeida Curi NH, Pinha PRS, Perovic P, Gonçalves PR, Santos PM, Brennand PGG, Kerches Rogeri P, Rosas Ribeiro P, da Rocha PA, de Lázari PR, Pedreira PA, Pinheiro PF, Lira PK, Ferreira PM, Martin PS, Antas PTZ, Marinho PH, Ruffino PHP, Camargo PHSA, Landgref Filho P, Mangini PR, Farias P, Cordeiro-Estrela P, de Faria Peres PH, Galetti PM Jr, Ramírez-Bautista P, Maués PCRA, Renaud PC, Sartorello R, Barros PA, Lombardi PM, Bessa R, Arroyo-Gerala P, de Souza RCC, Zenni RD, Flores Peredo R, Hoogesteijn R, Loyola R, Alves RSC, Rodarte RRP, Silva RL, de Oliveira R, Beltrão-Mendes R, Alencar RM, da Silva RC, Pedroso R, Sampaio RF, Ribeiro RLA, Pardini R, Twardowsky Ramalho Bonikowski R, Pagotto RV, Dias RA, Bassini-Silva R, Corassa Arrais R, Sampaio R, de Cassia Bianchi R, Paolino RM, Fusco-Costa R, Trovati RG, Espíndola Hack RO, Mauro RA, Nobre RA, Gessulli RD, León Pérez R, Massara RL, Fróes da Silva RM, de Paula RC, da Cunha RGT, Costa RT, Marques RV, Morato RG, Bovendorp RS, Dornas RADP, Andrade RS, Siciliano S, Guaragni SA, Rolim SG, Astete S, Cavalcanti S, Hartz SM, Carvalho S, Cortez S, Silvestre de Sousa SM, Ballari SA, Ramos Lima S, Cirignoli S, García-R S, Bazilio S, Solari Torres S, Back Franco S, Martins SR, de Bustos S, Age SG, Ferrari SF, Francisco TM, Micheletti T, Godim TMDS, Luiz TG, Ochotorena de Freitas TR, Rodrigues TF, Piovezan U, Barcos UC, Onofrio VC, Martin-Albarracin VL, Towns V, Araújo VC, Kanaan V, Daga VS, Boere V, de Araujo VPG, Benitez VV, Leandro-Silva V, Geraldi VC, Alberici V, Bastazini VAG, Gasparotto VPO, Orsini VS, da Silva VS, Rojas Bonzi V, Pereira VJA, Layme VMG, Duarte da Silva VH, Tomas WM, Moreira TA, Martins WP, de Moraes Pires WM, Hannibal W, Dáttilo W, Mottin V, Endo W, Bercê W, Carvalho WD, Magnusson W, Akkawi P, Di Blanco Y, Amaral PR, Ramos YGC, Rodríguez-Calderón YG, Mendes YR, Ribeiro YGG, Campos Z, Galetti M, and Ribeiro MC
- Subjects
- Animals, Argentina, Biodiversity, Cattle, Chile, Dogs, Florida, Mexico, Introduced Species, Mammals
- Abstract
Biological invasion is one of the main threats to native biodiversity. For a species to become invasive, it must be voluntarily or involuntarily introduced by humans into a nonnative habitat. Mammals were among first taxa to be introduced worldwide for game, meat, and labor, yet the number of species introduced in the Neotropics remains unknown. In this data set, we make available occurrence and abundance data on mammal species that (1) transposed a geographical barrier and (2) were voluntarily or involuntarily introduced by humans into the Neotropics. Our data set is composed of 73,738 historical and current georeferenced records on alien mammal species of which around 96% correspond to occurrence data on 77 species belonging to eight orders and 26 families. Data cover 26 continental countries in the Neotropics, ranging from Mexico and its frontier regions (southern Florida and coastal-central Florida in the southeast United States) to Argentina, Paraguay, Chile, and Uruguay, and the 13 countries of Caribbean islands. Our data set also includes neotropical species (e.g., Callithrix sp., Myocastor coypus, Nasua nasua) considered alien in particular areas of Neotropics. The most numerous species in terms of records are from Bos sp. (n = 37,782), Sus scrofa (n = 6,730), and Canis familiaris (n = 10,084); 17 species were represented by only one record (e.g., Syncerus caffer, Cervus timorensis, Cervus unicolor, Canis latrans). Primates have the highest number of species in the data set (n = 20 species), partly because of uncertainties regarding taxonomic identification of the genera Callithrix, which includes the species Callithrix aurita, Callithrix flaviceps, Callithrix geoffroyi, Callithrix jacchus, Callithrix kuhlii, Callithrix penicillata, and their hybrids. This unique data set will be a valuable source of information on invasion risk assessments, biodiversity redistribution and conservation-related research. There are no copyright restrictions. Please cite this data paper when using the data in publications. We also request that researchers and teachers inform us on how they are using the data., (© 2020 The Authors. Ecology © 2020 The Ecological Society of America.)
- Published
- 2020
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84. Economic impact of the liver condemnation of cattle infected with Fasciola hepatica in the Peruvian Andes.
- Author
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Arias-Pacheco C, Lucas JR, Rodríguez A, Córdoba D, and Lux-Hoppe EG
- Subjects
- Animals, Cattle, Cattle Diseases parasitology, Fascioliasis economics, Fascioliasis epidemiology, Fascioliasis parasitology, Liver parasitology, Peru epidemiology, Prevalence, Cattle Diseases economics, Cattle Diseases epidemiology, Fascioliasis veterinary
- Abstract
Fasciolosis is a zoonotic food- and waterborne infection related to great economic losses on ruminant production. In order to determine the prevalence of bovine liver condemnations due to fasciolosis in an abattoir at the Central Andes of Peru, we evaluated the records of an authorized slaughterhouse in Huancayo, at 3300 m above sea level, over 16 months. Subsequently, the average weights of condemned viscera and carcasses were also estimated to determine the direct and indirect economic losses. Fasciolosis was the main cause of liver condemnation, with a prevalence of 55.72% (3926/7046; CI 95%: 56.88-54.56%). The livers infected were more than double the amount of livers supplied to markets in this period. Although the average price of liver in the Peruvian Andes is very cheap, approximately 16.45 tons of livers were destroyed, estimating a direct economic loss of US$ 35,080 (CI 95%: US$ 29,178-40,938). The indirect loss due to decreased body weight gain (calculated using 10% of the average weight of a healthy animal carcass) was estimated at US$ 354,570 (CI 95%: US$ 387,908-US$ 321,227). Fasciolosis is an important zoonotic disease that threatens food security in the Andean region, with major repercussions on the income of the livestock industry and the availability of cheap protein sources.
- Published
- 2020
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85. Effect of Daily Exposure to an Isolated Soy Protein Supplement on Body Composition, Energy and Macronutrient Intake, Bone Formation Markers, and Lipid Profile in Children in Colombia.
- Author
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Mejía W, Córdoba D, Durán P, Chacón Y, and Rosselli D
- Subjects
- Alkaline Phosphatase blood, Biomarkers, Body Mass Index, Body Weight drug effects, Child, Child, Preschool, Colombia, Dietary Supplements, Female, Humans, Insulin-Like Growth Factor Binding Protein 3 blood, Insulin-Like Growth Factor I metabolism, Male, Nutritional Status drug effects, Body Composition drug effects, Bone and Bones drug effects, Energy Intake drug effects, Lipids blood, Nutrients administration & dosage, Osteogenesis drug effects, Soybean Proteins pharmacology
- Abstract
A soy protein-based supplement may optimize bone health, support physical growth, and stimulate bone formation. This study aimed to assess the effect of a daily soy protein supplement (SPS) on nutritional status, bone formation markers, lipid profile, and daily energy and macronutrient intake in children. One hundred seven participants (62 girls), ages 2 to 9, started the study and were randomly assigned to lunch fruit juice with (n = 57, intervention group) or without (n = 50, control group) addition of 45 g (230 Kcal) of a commercial SPS during 12 months; 84 children (51 girls, 33 boys) completed the study (45 and 39 intervention and control, respectively). Nutritional assessment included anthropometry and nutrient intakes; initial and final blood samples were taken; insulin-like growth factor-I (IGF-I), osteocalcin, bone specific alkaline phosphatase (BAP), insulin-like growth factor binding protein-3 (IGFBP-3), cholesterol, triglycerides, low-density lipoprotein (LDL), and high-density lipoprotein (HDL) were analyzed. Statistically significant changes (p < .05) in body mass index and weight for age Z scores were observed between groups while changes in body composition were not. Changes in energy, total protein, and carbohydrate intakes were significantly higher in the intervention group (p < .01). Calorie intake changes were statistically significant between groups (p < .001), and BAP decreased in both groups, with values within normal ranges. Osteocalcin, IGFBP-3, and lipid profile were not different between groups. IGF-I levels and IGF/IGFBP-3 ratio increased significantly in both groups. In conclusion, changes in macronutrient and energy intake and nutritional status in the intervention group compared to control group may ensure harmonious and adequate bone health and development.
- Published
- 2019
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86. Metabolomics: A potential way to know the role of vitamin D on multiple sclerosis.
- Author
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Luque-Córdoba D and Luque de Castro MD
- Subjects
- Animals, Dietary Supplements, Dose-Response Relationship, Drug, Humans, Multiple Sclerosis metabolism, Vitamin D administration & dosage, Metabolome genetics, Metabolomics, Multiple Sclerosis drug therapy, Vitamin D metabolism, Vitamin D therapeutic use
- Abstract
The literature about the influence of vitamin D on multiple sclerosis (MS) is very controversial, possibly as a result of the way through which the research on the subject has been conducted. The studies developed so far have been focused exclusively on gene expression: the effect of a given vitamin D metabolite on target receptors. The influence of the vitamin D status (either natural or after supplementation) on MS has been studied by measurement of the 25 monohydroxylated metabolite (also known as circulating form), despite the 1,25 dihydroxylated metabolite is considered the active form. In the light of the multiple metabolic pathways in which both forms of vitamin D (D
2 and D3 ) are involved, monitoring of the metabolites is crucial to know the activity of the target enzymes as a function of both the state of the MS patient and the clinical treatment applied. The study of metabolomics aspects is here proposed to clarify the present controversy. In "omics" terms, our proposal is to take profit from up-stream information-thus is, from metabolomics to genomics-with a potential subsequent step to systems biology, if required., (Copyright © 2016 Elsevier B.V. All rights reserved.)- Published
- 2017
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- View/download PDF
87. A note on stability shifting for the Muskat problem.
- Author
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Córdoba D, Gómez-Serrano J, and Zlatoš A
- Abstract
In this note, we show that there exist solutions of the Muskat problem that shift stability regimes: they start unstable, then become stable and finally return to the unstable regime. We also exhibit numerical evidence of solutions with medium-sized L(∞) norm of the derivative of the initial condition that develop a turning singularity., (© 2015 The Author(s) Published by the Royal Society. All rights reserved.)
- Published
- 2015
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88. Splash singularity for water waves.
- Author
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Castro A, Córdoba D, Fefferman CL, Gancedo F, and Gómez-Serrano J
- Abstract
We exhibit smooth initial data for the two-dimensional (2D) water-wave equation for which we prove that smoothness of the interface breaks down in finite time. Moreover, we show a stability result together with numerical evidence that there exist solutions of the 2D water-wave equation that start from a graph, turn over, and collapse in a splash singularity (self-intersecting curve in one point) in finite time.
- Published
- 2012
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89. Geological characterization of the Prestige sinking area.
- Author
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Ercilla G, Córdoba D, Gallart J, Gràcia E, Muñoz JA, Somoza L, Vázquez JT, and Vilas F
- Subjects
- Atlantic Ocean, Environmental Monitoring, Geological Phenomena, Geology, Humans, Seawater, Ships, Spain, Disasters, Fuel Oils, Geologic Sediments chemistry, Water Pollution, Chemical
- Abstract
The tanker Prestige sank off NW Iberia on the 19th November 2002. The stern and bow of the Prestige wreck are located on the southwestern edge of the Galicia Bank, at 3565 m and 3830 m water depths, respectively. This bank is a structural high controlled by major faults with predominant N-S, NNE-SSW, and NNW-SEE trends. It is characterized by moderate to low seismic activity. The faults have controlled the local depositional architecture, deforming, fracturing, relocating and distributing sediments since the Valangian (early Cretaceous). The Prestige sinking area corresponds to an asymmetric half-graben structure with a N-S trend, which conditions the present-day morphology. The faulted flank outcrops and its activity and erosion have favoured the occurrence of mass-movements (slumps, slump debris, mass-flows and turbidity currents), building valleys and depositional lobes. Nearsurface sediments comprise mostly terrigenous and biogenous turbiditic muds and sands with a minor presence of hemipelagic muds, except on the fault scarp where pelagites predominate. Potential geological hazards resulting from tectonic and sedimentary processes affect almost the entire Prestige sinking area.
- Published
- 2006
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90. Evidence of singularities for a family of contour dynamics equations.
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Córdoba D, Fontelos MA, Mancho AM, and Rodrigo JL
- Abstract
In this work, we show evidence of the existence of singularities developing in finite time for a class of contour dynamics equations depending on a parameter 0 < alpha = 1. The limiting case alpha --> 0 corresponds to 2D Euler equations, and alpha = 1 corresponds to the surface quasi-geostrophic equation. The singularity is point-like, and it is approached in a self-similar manner.
- Published
- 2005
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91. Almost sharp fronts for the surface quasi-geostrophic equation.
- Author
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Córdoba D, Fefferman C, and Rodrigo JL
- Abstract
We investigate the evolution of "almost sharp" fronts for the surface quasi-geostrophic equation. This equation was originally introduced in the geophysical context to investigate the formation and evolution of fronts, i.e., discontinuities between masses of hot and cold air. These almost sharp fronts are weak solutions of quasi-geostrophic with large gradient. We relate their evolution to the evolution of sharp fronts.
- Published
- 2004
- Full Text
- View/download PDF
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