138 results on '"San-Juan, M."'
Search Results
2. Energy Recovery from Immobilised Cells of Scenedesmus obliquus after Wastewater Treatment
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Gomez San Juan, M., Ometto, F., Whitton, R., Pidou, M., Jefferson, B., Villa, R., di Prisco, Marco, Series editor, Chen, Sheng-Hong, Series editor, Solari, Giovanni, Series editor, Vayas, Ioannis, Series editor, and Mannina, Giorgio, editor
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- 2017
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3. Lack of consistent sex differences in d-amphetamine-induced dopamine release measured with [18F]fallypride PET
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Smith, Christopher T., Dang, Linh C., Burgess, Leah L., Perkins, Scott F., San Juan, M. Danica, Smith, Darcy K., Cowan, Ronald L., Le, Nam T., Kessler, Robert M., Samanez-Larkin, Gregory R., and Zald, David H.
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- 2019
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4. Study of axial cutting forces and delamination phenomenon in drilling of carbon fiber composites
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Pascual, V., San-Juan, M., Santos, F.J., Martín, Ó., and de Tiedra, M.P.
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- 2017
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5. A survey on the experience of risk-taking behaviors of bedridden patients in neurosurgery
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Dubois, C., primary, San Juan, M., additional, Massa, C., additional, Raynaud, S., additional, Sontheimer, A., additional, Usclade, A., additional, Pereira, B., additional, Chaix, R., additional, and Lemaire, J.-J., additional
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- 2023
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6. Estado ecológico de sistemas lóticos rurales del sudeste bonaerense y efectos letales y subletales de plaguicidas sobre la especie no blanco Chilina parchappii
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Fernández San Juan M. Rocío
- Abstract
Los agroecosistemas han ido cambiando a lo largo del tiempo en todo el mundo, incorporando nuevas tecnologías para lograr mejores rendimientos y satisfacer así la creciente demanda de alimentos. El control químico de plagas y malezas mediante el uso de plaguicidas sigue siendo la herramienta de control más difundida en todo el mundo. Sin embargo, los plaguicidas se dispersan en el ambiente y pueden producir efectos adversos sobre organismos no blanco. Cuando estos compuestos llegan a los cuerpos de agua, pueden ser tóxicos para los organismos acuáticos que allí habitan, poniendo en riesgo a todo el ecosistema. Por lo tanto, resulta fundamental realizar un seguimiento de la acumulación de los plaguicidas en el ambiente y evaluar los efectos de los mismos sobre organismos no blanco. A partir de todo lo expuesto, en la presente Tesis Doctoral se planteó como hipótesis de trabajo que los sitios de muestreo presentan características que reflejan el impacto ambiental y que pueden observarse a nivel ecológico (índices bióticos o multimétricos), individual (bioindicadores) o subindividual (biomarcadores). El trabajo se desarrolló siguiendo el objetivo general de evaluar el estado ecológico de arroyos rurales pampeanos y los efectos de plaguicidas en una especie no blanco a partir de la aplicación y combinación de diferentes metodologías y a distintos niveles de organización. Para esto, se determinó el uso del suelo de las principales cuencas serranas del partido de Tandil, la calidad ecológica de los arroyos a partir de descriptores ecológicos e índices bióticos y multimétricos, la presencia y concentración de plaguicidas en los arroyos del área de estudio y se realizó un análisis de riesgo ecológico en cada sitio. Además, se evaluó la toxicidad aguda letal de diferentes plaguicidas sobre la especie acuática Chilina parchappii (molusco gasterópodo nativa) utilizada como modelo y se identificaron biomarcadores potenciales mediante la evaluación del efecto agudo y subcrónico de concentraciones subletales de los plaguicidas sobre parámetros bioquímicos en los organismos modelo. Finalmente, se determinó el estrés de los arroyos estudiados a partir de la combinación de biomarcadores de efecto. Para realizar el estudio, se realizaron muestreos en 4 arroyos (Napaleofú, Tandileofú, Las Chilcas y Chapaleofú) que atraviesan el partido de Tandil, en el sureste de la provincia de Buenos Aires, Argentina. Para la caracterización ecológica de los sitios, se tomaron muestras de agua y sedimento y se evaluaron las características fisicoquímicas del agua, variables en relación al hábitat, y presencia y composición del conjunto de macroinvertebrados presentes. A partir del análisis de las características estructurales y funcionales de los macroinvertebrados bentónicos se calcularon los índices bióticos IBPAMP y PBMWP, y el índice multimétrico SPEAR. Sumado a esto, se colectaron muestras de sedimento para la determinación de la presencia y concentración de cinco plaguicidas muy utilizados en la región pampeana (atrazina, acetoclor, clorpirifós, cipermetrina y 2,4-D). En base a las concentraciones registradas, se calcularon las unidades tóxicas (UT) para evaluar la contribución de cada plaguicida al riesgo de toxicidad a corto plazo para los organismos que habitan en sedimentos, y el cociente de riesgo (CR) para la evaluación del riesgo acuático a largo plazo. En laboratorio, se estudió la toxicidad de la cipermetrina (CIP) y el clorpirifós (CPF) en individuos Chilina parchappii. La selección de estos plaguicidas se basó en su alta toxicidad general y en su gran uso en la región. Se realizaron ensayos de CL50para cada compuesto y se comparó la sensibilidad de C. parchappiicon otros invertebrados de agua dulce a partir del cálculo de lasdistribuciones de sensibilidad de especies (SSD). Se realizaron bioensayos para evaluar efectos subletales en los individuos mediante la determinación de biomarcadores del sistema de defensa antioxidante: Catalasa (CAT), Glutatión peroxidasa (GPx) y Glutatión s-transferasas (GST), y Glutatión reducido (GSH). Finalmente, para comparar el estrés en los sitios de muestreo, se calculó el índice de respuesta de biomarcadores integrados (IBR) a partir de las actividades enzimáticas (CAT, GPx, GST) y no enzimáticas (GSH) evaluados en C. parchappii recolectados en cada uno de los sitios. Los resultados obtenidos evidencian el proceso de agriculturización que se viene dando en la región pampeana desde hace varias décadas en detrimento del pastizal templado. A pesarde esto, en la mayoría de los sitios de muestreo, los valores de los parámetros fisicoquímicos obtenidos no excedieron los niveles de referencia de calidad de vida y protección de la vida acuática en agua dulce superficial. En relación al hábitat, los sitios estudiados presentan una composición granulométrica principalmente limosa y con valores variables de materia orgánica. Por otro lado, se identificaron 27 taxa de macroinvertebrados bentónicos, y los valores medios de riqueza de taxa y de la diversidad (H ́) no presentaron diferencias significativas entre los sitios de muestreo. Los valores de IBPAMP por sitio presentaron diferencias significativas, y los valores registrados corresponden a calidad ambiental “muy crítica”, “crítica” o “dudosa”. Los valoresdel índice PBMWP determinaron una calidad ambiental “crítica” o “muy crítica”, y los valores del índice SPEAR determinaron que los sitios presentan calidad ambiental “pobre” a “mala” debido al impacto de plaguicidas. En relación a la presencia y concentración de plaguicidas, la cipermetrina fue el único compuesto detectado en todos los sitios y temporadas de muestreo. El clorpirifós fue el segundo plaguicida con mayor frecuencia de detección (>88%), mientras que los herbicidas acetoclor, atrazina y 2,4-D sólo se detectaron en algunas temporadas de muestreo. Las concentraciones máximas de atrazina (57 μg/kg) y del clorpirifós (50.5 μg/kg) se registraron en diciembre. En febrero se registraron las mayores concentraciones de 2,4-D (46.1 μg/kg) y de cipermetrina (20.5 μg/kg), mientras que, la mayor concentración de acetoclor (32.6 μg/kg) se registró en octubre. En cuanto al riesgo, la ΣUT fue mayor en diciembre, con valores superiores a 1 en la mayoría de los sitios de muestreo, indicando un riesgo por toxicidadaguda de plaguicidas para los organismos bentónicos que allí habitan. En la mayoría de los sitios, el riesgo ecológico por toxicidad aguda se debe principalmente a la presencia de clorpirifós, seguido de cipermetrina y acetoclor. Por otro lado, ΣCR fue mayor a 1 en todos los sitios de muestreo en diciembre y octubre, indicando en estos casos un alto riesgo de toxicidad crónica debido principalmente a la presencia de acetoclor en el ambiente. Los valores de CL50 (24 horas) en C. parchappii fueron 53.62 mg/L y 4.06 mg/L para CIP y CPF, respectivamente. Las comparaciones de sensibilidad de CIP y CPF entre especies de invertebrados de agua dulce muestran que C. parchappiies la especie más resistente para los dos plaguicidas estudiados según la base de datos de la ECOTOX. Los plaguicidas CIP y CPF tuvieron un efecto inhibitorio de la actividad CAT entre un 10 y un 40%. La actividad GPx fue mayor (24 a 190%) en caracoles expuestos a CIP y CPF en comparación con los controles. En todos los tiempos de estudio, se registraron aumentos mayores al 27% en la actividad GST con CIP, y mayores a 18% con CPF. Los niveles de GSH de los organismos expuestos a CIP y con CPF aumentaron respecto a los controles en los tres tiempos de estudio, con porcentajes de aumento superiores al 64% y 26% a los 10 días de exposición en los ensayos con CIP y CPF, respectivamente. Finalmente, el índice IBR presentó diferencias significativas entre los sitios de muestreo indicando distintos niveles de estrés. Esta es la primera vez que se usa el enfoque IBR en gasterópodos acuáticos de la región pampeana, y los resultados obtenidos podrían estar dando un puntapié inicial para futuros estudios que permitanprofundizar en el uso de componentes del sistema de defensa antioxidante como biomarcadoresde estrés en los monitoreos ambientales. Las metodologías aplicadas en el presente trabajo podrían resultar ser herramientas eficientes para ser utilizadas de manera complementaria en la evaluación del impacto de los plaguicidas en los ecosistemas acuáticos pampeanos. Agroecosystems have been changing over time throughout the world, incorporating new technologies to achieve better yields and thus meet the growing demand for food. Chemical control of pests and weeds through the use of pesticides remains the most widespread control tool in the world. However, pesticides are dispersed in the environment and can cause adverse effects on non-target organisms. When these compounds reach bodies of water, they can be toxic to the aquatic organisms that live there, putting the entire ecosystem at risk. Therefore, it is essential to monitor the accumulation of pesticides in the environment and evaluate their effects on non-target organisms. Based on the above, in this Doctoral Thesis it was proposed as a working hypothesis that the sampling sites have characteristics that reflect the environmental impact and that can be observed at the ecological level (biotic or multimetric indices), individual (bioindicators) or sub-individual. (biomarkers). The work was developed following the general objective of evaluating the ecological status of rural pampas streams and the effects of pesticides on a non-target species from the combination of different methodologies and at different levels of organization. For this, the land use of the main basins of the district of Tandil and the ecological quality of the streams were determined from ecological descriptors and biotic and multimetric indices. The presence and concentration of pesticides in the streams of the study area were also evaluated, and an ecological risk analysis was carried out at each site. In addition, the lethal acute toxicity of different pesticides on the aquatic species Chilina parchappiiused as a model was evaluated, and potential biomarkers were identified by evaluating the acute and subchronic effect of sublethal concentrations of pesticides on biochemical parameters in Chilina parchappii. Finally, the stress of the studied streams was determined from the combination of effect biomarkers.To carry out the study, samples were taken in 4 streams that cross the district of Tandil (Napaleofú, Tandileofú, Las Chilcas and Chapaleofú), in the southeast of the province of Buenos Aires, Argentina. For the ecological characterization of the sites, water and sediment samples were taken and the physicochemical characteristics of the water, variables in relation to the habitat, and the presence and composition of the set of macroinvertebrates present were evaluated. From the analysis of the structural and functional characteristics of the benthic macroinvertebrates, the IBPAMP and PBMWP biotic indices and the SPEAR multimetric index were calculated. Added to this, sediment samples were collected to determine the presence and concentration of five pesticides widely usedin the pampas region (atrazine, acetochlor, chlorpyrifos, cypermethrin and 2,4-D). Based on the recorded concentrations, the toxic units (TU) were calculated to assess the contribution of each pesticide to the short-term toxicity risk for sediment-dwelling organisms, and the risk quotient (HR) for the toxicity assessment to the long-term. In the laboratory, the toxicity of cypermethrin (CIP) and chlorpyrifos (CPF) was studied in Chilina parchappiiindividuals. The selection of these pesticides was based ontheir high general toxicity and their wide use in the region. LC50assays were performed for each compound and the sensitivity of C. parchappiiwas compared with other freshwater invertebrates from calculation of species sensitivity distributions (SSDs). Bioassays were carried out to evaluate sublethal effects in individuals by determining biomarkers of the antioxidant defense system: Catalase (CAT), Glutathione peroxidase (GPx) and Glutathione s-transferases (GST), and reduced Glutathione (GSH). Finally, to compare the stress in the sampling sites, the integrated biomarker response index (IBR) was calculated from the enzymatic (CAT, GPx, GST) and non-enzymatic (GSH) activities evaluated in C. parchappiicollected in each of the sites.The results obtained show the process of agriculturization that has been observed in the Pampas region for several decades to the detriment of the temperate grassland. Despite this, in most of the sampling sites, the values of the physicochemical parameters obtained did not exceed the reference levels for quality of life and protection of aquatic life in surface freshwater. In relation to the habitat, the studied sites present a granulometric composition mainly silty and with variable values of organic matter. On the other hand, 27 benthic macroinvertebrate taxa were identified, and the mean values of taxa richness and diversity (H ́) did not present significant differences between the sampling sites. The IBPAMP values by site showed significant differences, and the registered values correspond to "very critical", "critical" or "doubtful" environmental quality. The values of the PBMWP index determined a "critical" or "very critical" environmental quality, and the values of the SPEAR index determined that the sites present "poor" to "bad" environmental quality due to the impact of pesticides. Regarding the presence and concentration of pesticides, cypermethrin was the only compound detected in all sampling sites and seasons. Chlorpyrifos was the second most frequently detected pesticide (>88%), while the herbicides acetochlor, atrazine and 2,4-D were less frequently detected and were only detected in some sampling seasons. The maximum concentrations of atrazine (57 μg/kg) and chlorpyrifos (50.5 μg/kg) were recorded in December. The highest concentrations of 2,4-D (46.1 μg/kg) and cypermethrin (20.5 μg/kg) were recorded in February, while the highest concentration of acetochlor (32.6 μg/kg) was recorded in October. Regarding the risk, the ΣTU was higher in December, with values greaterthan 1 in most of the sampling sites, indicating a risk due to acute toxicity of pesticides for the benthic organisms that live there. In most sites, the ecological risk for acute toxicity is mainly due to the presence of chlorpyrifos, followed by cypermethrin and acetochlor. On the other hand, ΣHR was greater than 1 in all the sampling sites in December and October, indicating in these cases a high risk of chronic toxicity, mainly due to the presence of acetochlor in the environment. LC50values (24 hours) in C. parchappiiwere 53.62 mg/L and 4.06 mg/L for CIP and CPF, respectively. Comparisons of CIP and CPF sensitivity between freshwater invertebrate species show that C. parchappiiis the most resistant species for the two pesticides studied according tothe ECOTOX database. The pesticides CIP and CPF had an inhibitory effect on CAT activity between 10 and 40%. GPx activity was higher (24 to 190%) in snails exposed to CIP and CPF compared to controls. At all study times, increases greater than 27% in GST activity were recorded with CIP, and greater than 18% with CPF. The levels of GSH of the organisms exposed to CIP and with CPF increased with respect to the controls in the three study times, with percentages of increase greater than 64% and 26% at 10 daysof exposure in the tests with CIP and CPF, respectively. Finally, the IBR index presented significant differences between the sampling sites, indicating different levels of stress. This is the first time that the IBR approach has been used in aquatic gastropods of the pampas region, and the results obtained could be giving an initial kick for future studies that allow deepening the use of the components of the antioxidant defense system as stress biomarkers in environmental monitoring. The methodologies applied in the present work could turn out to be efficient tools to be used in a complementary way in the evaluation of the impact of pesticides in the pampas aquatic ecosystems.
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- 2023
7. Partial-volume correction increases estimated dopamine D2-like receptor binding potential and reduces adult age differences
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Smith, Christopher T, Crawford, Jennifer L, Dang, Linh C, Seaman, Kendra L, San Juan, M Danica, Vijay, Aishwarya, Katz, Daniel T, Matuskey, David, Cowan, Ronald L, Morris, Evan D, Zald, David H, and Samanez-Larkin, Gregory R
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- 2019
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8. Potential phytoremediation system using macrophyte Limnobium laevigatum to remove in situ Cr from contaminated bottom sediments.
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Martino, Lucila J., Fernández San Juan, M. Rocío, and Angelo, Cristian D'
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CONTAMINATED sediments ,LASER-induced breakdown spectroscopy ,PHYTOREMEDIATION ,MACROPHYTES ,LAKE sediments ,POLLUTION - Abstract
The contamination of aquatic environments with heavy metals is an important issue, and in turn, it is crucial to study remediation techniques that can be applied in situ. In this work, the use of a containment system with macrophytes Limnobium laevigatum is explored in the laboratory to evaluate the remotion of Cr in contaminated sediments. The roots of the plants were placed in contact with the bottom sediment through a containment system. The concentration of Cr in macrophyte and sediment samples exposed to different exposure times (1, 4 and 7 days) was determined by laser-induced breakdown spectroscopy technique. The initial concentration of Cr in the sediment was 112 ± 5 mg/kg and decreased by 65% to the control (p < 0.05) after 24 h of exposure. The removal continued throughout the study time until reaching values of 23 ± 1 mg/kg. In macrophytes, the Cr concentration increased from 20 ± 5 mg/kg to 2066 ± 216 mg/kg after seven days of exposure. The correlation coefficient between Cr concentrations in both matrices was −0.96. Finally, the bioaccumulation factor of Cr in L. laevigatum was 95.22 ± 8.51. Therefore, the system studied could be a potential tool to remedy the bottom sediments of streams and lakes contaminated with heavy metals in situ. [ABSTRACT FROM AUTHOR]
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- 2023
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9. Ventral striatal dopamine transporter availability is associated with lower trait motor impulsivity in healthy adults
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Smith, Christopher T., San Juan, M. Danica, Dang, Linh C., Katz, Daniel T., Perkins, Scott F., Burgess, Leah L., Cowan, Ronald L., Manning, H. Charles, Nickels, Michael L., Claassen, Daniel O., Samanez-Larkin, Gregory R., and Zald, David H.
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- 2018
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10. Study of Cutting Forces and Temperatures in Milling of AISI 316L
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San-Juan, M., Martín, Ó., Tiedra, M. del P. de, Santos, F.J., López, R., and Cebrián, J.A.
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- 2015
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11. An Experience in Integrated Knowledge about Manufacturing Technologies for Students of the Grades of Industrial Engineering
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San-Juan, M., Tiedra, M. del P. de, Martín, O., Santos, F.J., López, R., Suárez, R., and Mahillo-Isla, R.
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- 2015
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12. Bioaccumulation of heavy metals in Limnobium laevigatum and Ludwigia peploides: their phytoremediation potential in water contaminated with heavy metals
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Fernández San Juan, M. Rocío, Albornoz, Carolina B., Larsen, Karen, and Najle, Roberto
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- 2018
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13. Cuenca del Arroyo Chapaleofú: agriculturización y efecto del insecticida clorpirifos sobre una especie no blanco
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Pena Gómez, Paula Rocío, Fernández San Juan, M. Rocío, Somoza, Ailín, Vázquez, Patricia, Cortelezzi, Agustina, Pena Gómez, Paula Rocío, Fernández San Juan, M. Rocío, Somoza, Ailín, Vázquez, Patricia, and Cortelezzi, Agustina
- Abstract
Agriculturization constitutes a cause of transformation in the territories. The current prevailing model of agriculture, based on the application of pesticides to keep the crop healthy and without competition, not only affects the target species but also non-target species, impacting local biodiversity and the proper functioning of ecosystems. The objective of this work was to analyze changes in land use in the Upper Basin of the Chapaleofú Stream, and determine the toxicity of chlorpyrifos on a non-target species. For this, supervised classified images (years 1989 and 2019) of Tandil district (Buenos Aires, Argentina) were comparison and Lethal Concentration 50 (LC50) of the insecticide chlorpyrifos on the mollusk Physa acuta at 96 hours of exposure was determined. A 74.35% advance of the land destined for agricultural activities was detected, which shows the process of agriculturization. Physa acuta has an LC50 of 0.55 mg L−1 , presenting at the same time sublethal effects, despite being a species tolerant to the chemical in question. Regarding the conclusions, more studies are required to generate information on the impact of the multiple chemicals used in agricultural activity, considering longer exposures and with more sensitivity species, La agriculturización es un causante de transformación en los territorios. El actual modelo de agricultura predominante, basado en la aplicación de plaguicidas para mantener el cultivo saludable y sin competencia, no solo afecta a la especie objetivo sino también a aquellas no blanco, impactando en la biodiversidad local y el funcionamiento de los ecosistemas. El objetivo del presente estudio fue analizar los cambios en los usos del suelo en la Cuenca Alta del Arroyo Chapaleofú y determinar la toxicidad del clorpirifos sobre una especie no blanco. Para esto, se compararon imágenes clasificadas supervisadas de los años 1989 y 2019 del partido de Tandil (Buenos Aires, Argentina) y se realizó la evaluación de la Concentración Letal 50 (CL50) del insecticida clorpirifos sobre el molusco Physa acuta, a 96 horas de exposición. Se detecta un 74.35% de avance de las tierras destinadas a actividades agrícolas, lo que evidencia el proceso de agriculturización. El molusco Physa acuta tiene una CL50 de 0.55 mg L−1 , presentando al mismo tiempo efectos subletales, pese a tratarse de una especie tolerante al químico en cuestión. Debido a lo anterior, es necesario realizar más estudios que permitan determinar los efectos de los múltiples químicos utilizados en la actividad agrícola, considerando exposiciones más prolongadas y con especies más sensibles
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- 2022
14. VALIDATION OF PRIORITY CRITERIA FOR RESTARTING ENDOSCOPIC ACTIVITY AFTER THE FIRST WAVE OF COVID19 PANDEMIC IN SPAIN. THE ENDOPRIOR STUDY
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Rivero Sánchez, L., additional, García-Rodríguez, A., additional, Castillo, J., additional, Diez-Redondo, P., additional, Nuñez Rodriguez, H., additional, Ponce, M., additional, San Juan, M., additional, Seoane, A., additional, Albert Carrasco, M., additional, Zaffalon, D., additional, Guarner, C., additional, Murzi, M., additional, Jover, R., additional, Medina Prado, L., additional, Aspuru Rubio, K., additional, García Zafra, B., additional, Joao Matias, D., additional, Cárdenas, A., additional, Gonzalez Suarez, B., additional, Sendino, O., additional, Cordoba, H., additional, Fernández-Simón, A., additional, Araujo, I., additional, Ginés, A., additional, Llach, J., additional, Fernández-Esparrach, G., additional, Pellisé, M., additional, and Balaguer, F., additional
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- 2022
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15. FULFILMENT ANALYSIS OF QUALITY STANDARDS, STABLISHED BY THE EUROPEAN SOCIETY OF GASTROINTESTINAL ENDOSCOPY, IN SMALL-BOWEL CAPSULE ENDOSCOPY IN SPANISH CENTERS
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Gómez Villagrá, M, additional, Prieto, C., additional, Acitores, D., additional, Alonso, M, additional, Alonso, N, additional, Caballero, N, additional, Sánchez Ceballos, F, additional, Compañy, L, additional, Egea, J, additional, Esteban, P, additional, Farrais, S, additional, Fernandez-Urien, I, additional, Galvez, C, additional, García, A, additional, Garcia LLedo, J, additional, Gonzalez, B, additional, Jimenez, A, additional, Lujan, M, additional, Mateos, B, additional, Romero, C, additional, San Juan, M, additional, Valdivieso, E, additional, and Carretero, C, additional
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- 2022
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16. Potential phytoremediation system using macrophyte Limnobium laevigatum to remove in situ Cr from contaminated bottom sediments
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Martino, Lucila J., primary, Fernández San Juan, M. Rocío, additional, and Angelo, Cristian D’, additional
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- 2022
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17. Análisis del cumplimiento de los criterios de calidad en enteroscopia con cápsula establecidos por la European Society of Gastrointestinal Endoscopy
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Gomez, M., primary, Prieto, C., additional, Acitores, D., additional, Alonso, M., additional, Alonso, N., additional, Caballero, N., additional, Sánchez, F., additional, Compañy, L., additional, Egea, J., additional, Esteban, P., additional, Estévez, P., additional, Farrais, S., additional, Fernandez-Urien, I, additional, Gálvez, C., additional, García, A., additional, García, J., additional, González, B., additional, Jiménez, A., additional, Luján, M., additional, Mateos, B., additional, Martín, J.L, additional, Romero, C., additional, San Juan, M., additional, Valdivieso, E., additional, and Carretero, C., additional
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- 2021
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18. Serum Biomarkers in Differential Diagnosis of Idiopathic Pulmonary Fibrosis and Connective Tissue Disease-Associated Interstitial Lung Disease
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Cabrera Cesar, Eva, primary, Lopez-Lopez, Lidia, additional, Lara, Estrella, additional, Hidalgo-San Juan, M. Victoria, additional, Parrado Romero, Concepcion, additional, Palencia, Jose Luis Royo Sánchez, additional, Martín-Montañez, Elisa, additional, and Garcia-Fernandez, Maria, additional
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- 2021
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19. Red de comercialización y uso de plaguicidas en el partido de Tandil, sector del sudeste de la provincia de Buenos Aires, Argentina.
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Pena Gómez, Paula Rocío, Fernández San Juan, M. Rocío, Cortelezzi, Agustina, Vázquez, Patricia, Pena Gómez, Paula Rocío, Fernández San Juan, M. Rocío, Cortelezzi, Agustina, and Vázquez, Patricia
- Abstract
Agricultural activity is an engine of the Argentine economy, and given the extensive use of pesticides in food production, it is essential to understand their handling to assess their effects on the environment and people's health. The objective was to know the main aspects of the network of actors that use and commercialize pesticides in the Tandil district (Buenos Aires) during 2019 and 2020. Qualified referents were interviewed and agricultural producers in the area were surveyed. 10 main actors were identified, grouped into 3 categories (government agencies, civil and private associations) which proved to be linked through activities such as control, training or trade flows. The key actors agreed on the scarcity of resources assigned to control, the low use of the agronomic recipe and the diverse final destination of the empty drums. Added to this, the anthropocentric look in relation to nature, the lack of professional advice in the fields, and distrust in agroecological production is evident. The need to incorporate new actors into the network, generate public policies that allow greater control, and the urgency of undergoing a change in the productive paradigm is concluded., As atividades agrícolas conformam o motor da economia argentina e perante a extensa utilização de pesticidas na elaboração de alimentos, é fundamental compreender o controle para avaliar seus efeitos sobre o ambiente e a saúde das pessoas. O objetivo foi conhecer os principais aspectos da rede de atores que usam e comercializam pesticidas na zona de Tandil (Buenos Aires) durante 2009 e 2010. Entrevistou-se a referentes qualificados e se realizaram enquetes a produtores agrícolas da zona. Identificaram-se 10 atores principais, agrupa-dos em 3 categorias (organismos governamentais, associações civis e privadas) os quais demostraram encontrar-se vinculados a través de atividades tais como controle, capacitação ou fluxos comerciais. Os atores chaves coincidiram na escassez de recursos assignados ao controle, à baixa utilização da receita agro-nômica e o diverso destino final dos tambores vazios. Além disto, evidencia-se um olhar antropocêntrico em relação à natureza, à falta de assessoramento profissional nos campos e desconfiança na produção agroecológica. Conclui-se a necessidade de incorporar novos atores à rede, gerar políticas públicas que possibilitem um maior controle e a urgência de transitar uma mudança de paradigma produtivo., La actividad agrícola conforma un motor de la economía argentina, y ante la extensiva utilización de plaguicidas en la elaboración de alimentos, es fundamental comprender el manejo de los mismos para evaluar sus efectos sobre el ambiente y la salud de las personas. El objetivo fue conocer los principales aspectos de la red de actores que usan y comercializan plaguicidas en el partido de Tandil (Buenos Aires) durante 2019 y 2020. Se entrevistó a referentes calificados y se encuestó a productores agrícolas de la zona. Se identificaron 10 actores principales, agrupados en 3 categorías (organismos gubernamentales, asociaciones civiles y privados) los cuales demostraron encontrarse vinculados a través de actividades tales como control, capacitación o flujos comerciales. Los actores clave coincidieron en la escasez de recursos asignados al control, la baja utilización de la receta agronómica y el diverso destino final de los bidones vacíos. Sumado a esto, se evidencia la mirada antropocéntrica en relación a la naturaleza, la falta de asesoramiento profesional en los campos, y desconfianza en la producción agroecológica. Se concluye la necesidad de incorporar nuevos actores a la red, generar políticas públicas que posibiliten un mayor control, y la urgencia de transitar un cambio de paradigma productivo.
- Published
- 2021
20. Pro-fibrotic Factors as Potential Biomarkers of Anti-fibrotic Drug Therapy in Patients With Idiopathic Pulmonary Fibrosis
- Author
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Lopez-Lopez, Lidia, primary, Cabrera Cesar, Eva, additional, Lara, Estrella, additional, Hidalgo-San Juan, M. Victoria, additional, Parrado, Concepcion, additional, Martín-Montañez, Elisa, additional, and Garcia-Fernandez, Maria, additional
- Published
- 2021
- Full Text
- View/download PDF
21. MA10.08 Omega-3 Fatty Acids for Cancer Cachexia in Advanced Non-small Cell Lung Cancer: A Meta-analysis
- Author
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Chua, A., primary, Hernandez, A.R., additional, Mendoza, M.J., additional, and San Juan, M., additional
- Published
- 2021
- Full Text
- View/download PDF
22. Ecological Risk Assessment of Pesticides in Sediments of Pampean Streams, Argentina
- Author
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Fernández San Juan, M. Rocio, primary, Lavarías, S.M.L., additional, Aparicio, Virginia, additional, Larsen, Karen E., additional, Colman Lerner, Esteban, additional, and Cortelezzi, Agustina, additional
- Published
- 2021
- Full Text
- View/download PDF
23. How to Mainstream Sustainability and Circularity Into the Bioeconomy?
- Author
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Gomez San Juan, M., Bogdanski, A., Gomez San Juan, M., and Bogdanski, A.
- Subjects
- Sustainable agriculture--Economic aspects, Sustainability
- Abstract
This compendium covers the entire continuum of economic sectors that have a stake in biological knowledge and resources. It outlines 250 sources of good practices and policies, such as integrating engineering design with biotechnology to unlock commercial potential.
- Published
- 2022
24. 64P Hematologic indices of inflammation as prognosticators in gallbladder cancer: A meta-analysis and systematic review
- Author
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Velasco, R.N., primary, Tan, H.N., additional, and San Juan, M., additional
- Published
- 2020
- Full Text
- View/download PDF
25. P-114 Cytokines as a prognostic marker of overall survival in pancreatic cancer: A meta-analysis and systematic review
- Author
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Tan, H., primary, Velasco, R., additional, San Juan, M., additional, and Cornelio, G., additional
- Published
- 2020
- Full Text
- View/download PDF
26. P110 Identification of the tryptophan metabolite 3-hydroxyanthranilic acid as a novel tool for the differentiation of Crohn’s disease phenotypes
- Author
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Huhn, M, primary, Herrero San Juan, M, additional, Melcher, B, additional, Dreis, C, additional, Schmidt, K, additional, Pfeilschifter, J M, additional, Vieth, M, additional, Stein, J, additional, and Radeke, H H, additional
- Published
- 2020
- Full Text
- View/download PDF
27. Prognostic significance of tumour-infiltrating lymphocytes on survival outcomes of patients with resected pancreatic ductal adenocarcinoma: A systematic review and meta-analysis
- Author
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Tan, H.N., primary, Catedral, L.I., additional, and San Juan, M., additional
- Published
- 2019
- Full Text
- View/download PDF
28. A New Method for Determining the Chip Geometry in Milling
- Author
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San Juan, M., primary, Santos, F.J., additional, de la Fuente, T., additional, and Aranda, S., additional
- Published
- 2006
- Full Text
- View/download PDF
29. Porfiria aguda intermitente con debut en el puerperio
- Author
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Laura San Juan M, Peña Dieste P, Catalina Renata Elizalde M, Cristina Fernández García, and Valentina Fernández L.
- Subjects
embarazo ,Obstetrics and Gynecology ,convulsiones ,porfirias - Abstract
RESUMEN Objetivo: Las porfirias son trastornos que resultan de un defecto enzimático específico en la vía bioquímica de las porfirias. Los síntomas clínicos incluyen dolor abdominal, alteraciones gastrointestinales y manifestaciones psiquiátricas. Material y métodos: Mujer de 41 años, con diabetes gestacional y parto por cesárea hace 7 días, que acude a urgencias con convulsiones tónicoclónicas. En tratamiento antibiótico por infección de la herida quirúrgica. Los exámenes de laboratorio demostraron hiponatremia, hipokalemia y anemia. El diagnóstico de porfiria aguda intermitente (PAI) fue confirmado por el hallazgo de porfirinas elevadas en orina. La paciente fue dada de alta después de dos semanas. Resultados: se solicita un test rápido de PBG cuantitativo en orina, que resulta positivo (>10 mg PBG / g creatinina), por lo que se solicita un estudio completo de la enfermedad y se envían muestras a un hospital de referencia para análisis bioquímico y genético de PBGD/HMBS (Hidroximetilbilano sintetasa /PBG-desaminasa). Presenta la mutación c.815_818 del AGGA, que se trasmite de forma autosómica dominante, aunque con baja penetrancia. Conclusión: El diagnóstico de PAI es complejo debido al amplio espectro de síntomas, además el embarazo y el puerperio puede exacerbar la enfermedad.
- Published
- 2019
30. Cancer-induced inflammation and inflammation-induced cancer in colon: A role for S1P lyase
- Author
-
Schwiebs, A., Herrero San Juan, M., Schmidt, K.G., Wiercinska, E., Anlauf, M., Ottenlinger, F., Thomas, D., Elwakeel, E., Weigert, A., Farin, H.F., Bonig, H., Scholich, K., Geisslinger, G., Pfeilschifter, J.M., Radeke, H.H., and Publica
- Abstract
A role of sphingolipids for inflammatory bowel disease and cancer is evident. However, the relative and separate contribution of sphingolipid deterioration in inflammation versus carcinogenesis for the pathophysiology of colitis-associated colon cancer (CAC) was unknown and therefore examined in this study. We performed isogenic bone marrow transplantation of inducible sphingosine-1-phosphate (S1P) lyase knockout mice to specifically modulate sphingolipids and associated genes and proteins in a compartment-specific way in a DSS/AOM mediated CAC model. 3D organoid cultures were used in vitro. S1P lyase (SGPL1) knockout in either immune cells or tissue, caused local sphingolipid accumulation leading to a dichotomic development of CAC: Immune cell SGPL1 knockout (I-SGPL−/−) augmented massive immune cell infiltration initiating colitis with lesions and calprotectin increase. Pathological crypt remodeling plus extracellular S1P-signaling caused delayed tumor formation characterized by S1P receptor 1, STAT3 mRNA increase, as well as programmed cell death ligand 1 expression, accompanied by a putatively counter regulatory STAT1S727 phosphorylation. In contrast, tissue SGPL1 knockout (T-SGPL−/−) provoked immediate occurrence of epithelial-driven tumors with upregulated sphingosine kinase 1, S1P receptor 2 and epidermal growth factor receptor. Here, progressing carcinogenesis was accompanied by an IL-12 to IL-23 shift with a consecutive development of a Th2/GATA3-driven, tumor-favoring microenvironment. Moreover, the knockout models showed distinct lymphopenia and neutrophilia, different from the full SGPL1 knockout. This study shows that depending on the initiating cellular S1P source, the pathophysiology of inflammation-induced cancer versus cancer-induced inflammation develops through separate, discernible molecular steps.
- Published
- 2019
31. Aprender en el contexto de la empresa
- Author
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Tiedra, P. de, Martín, Óscar, San Juan, M., and Santos, F. J.
- Abstract
Congreso Universitario de Innovación Educativa En las Enseñanzas Técnicas, CUIEET (26º. 2018. Gijón)
- Published
- 2018
32. Aspectos clínicos y microbiológicos de la peritonitis asociada a diálisis peritoneal en pacientes adultos con insuficiencia renal crónica en el Servicio de Urgencias
- Author
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San Juan M., Pablo, Pérez J., Angélica, and Barrientos A., Cornelio
- Subjects
chronic renal disease ,hyponatremia ,continua ambulatoria ,hiponatremia ,Candida albicans ,continuous ambulatory peritoneal dialysis ,hypoalbuminemia ,peritonitis ,enfermedad renal crónica ,diálisis peritoneal ,hipoalbuminemia - Abstract
Resumen Introducción: La peritonitis es la complicación más importante y frecuente de la diálisis peritoneal (DP), las infecciones bacterianas son las responsables en la mayoría de los casos, con sintomatología característica. Objetivo: Determinar los patógenos más frecuentes en peritonitis asociado con la DP en pacientes con insuficiencia renal crónica (IRC). Metodología: Estudio retrospectivo, descriptivo, transversal y observacional, de pacientes con peritonitis en DP con IRC del servicio de urgencias, entre julio de 2012 y junio de 2013. Se evaluaron de los expedientes datos sociodemográficos, de diagnóstico, clínicos y microbiológicos y celulares de líquido de diálisis. Resultados: De 73 expedientes revisados 52% correspondían a pacientes del género masculino, la causa primaria de la IRC fue la diabetes mellitus tipo 2 (67%). Síntomas presentados: dolor abdominal (86%), vómitos (42%) y náuseas (34%), con anemia, azoemia, hiperglicemia hipoalbuminemia e hiponatremia. Los cultivos microbiológicos positivos fueron 59%; y los patógenos identificados fueron Candida tropicalis (9,6%), Staphylococcus epidermidis (8,2%), y Enterococcus faecalis y Staphylococcus haemolyticus (6,8% cada uno), asociados con elevación de leucocitos, azoemia y celularidad alta en el líquido peritoneal (p < 0,05). Conclusiones: El principal microorganismo determinado fue de origen fúngico asociado a leucocitos, azoemia y celularidad alta. Background: Peritonitis is the most important and frequent complication of peritoneal dialysis (PD). Bacterial infections are responsible in most cases, with characteristic symptoms. Aim: To determine the most frequent pathogens in peritonitis associated with PD in patients with chronic renal failure (CRF). Methodos: Retrospective, descriptive, cross-sectional and observational study of patients with peritonitis in PD with CRF of the emergency department, between July 2012 and June 2013. Sociodemographic, diagnostic, clinical and microbiological and cellular data were evaluated from the patient's fluid. Dialysis. Results: From 73 reviewed records, 52% were male. The primary cause of CRF was diabetes mellitus type 2 (67%). Symptoms presented: abdominal pain (86%), vomiting (42%) and nausea (34%), with anemia, azotemia, hyperglycemia, hypoalbuminemia and hyponatremia. The positive microbiological cultures were 59%; and the pathogens identified were Candida tropicalis (9.6%), Staphylococcus epidermidis (8.2%), Enterococcus faecalis and Staphylococcus haemolyticus (6.8% each one), associated with elevated leukocytes, azotemia and high cellularity in peritoneal fluid (p
- Published
- 2018
33. Aspectos clínicos y microbiológicos de la peritonitis asociada a diálisis peritoneal en pacientes adultos con insuficiencia renal crónica en el Servicio de Urgencias
- Author
-
Cornelio Barrientos A., Angélica Pérez J., and Pablo San Juan M.
- Subjects
medicine.medical_specialty ,business.industry ,hiponatremia ,medicine.medical_treatment ,Peritoneal fluid ,Continuous ambulatory peritoneal dialysis ,Public Health, Environmental and Occupational Health ,Peritonitis ,medicine.disease ,enfermedad renal crónica ,Gastroenterology ,diálisis peritoneal ,Peritoneal dialysis ,Infectious Diseases ,continua ambulatoria ,Internal medicine ,Candida albicans ,medicine ,Hypoalbuminemia ,Azotemia ,business ,Hyponatremia ,peritonitis ,Dialysis ,hipoalbuminemia - Abstract
Resumen Introducción: La peritonitis es la complicación más importante y frecuente de la diálisis peritoneal (DP), las infecciones bacterianas son las responsables en la mayoría de los casos, con sintomatología característica. Objetivo: Determinar los patógenos más frecuentes en peritonitis asociado con la DP en pacientes con insuficiencia renal crónica (IRC). Metodología: Estudio retrospectivo, descriptivo, transversal y observacional, de pacientes con peritonitis en DP con IRC del servicio de urgencias, entre julio de 2012 y junio de 2013. Se evaluaron de los expedientes datos sociodemográficos, de diagnóstico, clínicos y microbiológicos y celulares de líquido de diálisis. Resultados: De 73 expedientes revisados 52% correspondían a pacientes del género masculino, la causa primaria de la IRC fue la diabetes mellitus tipo 2 (67%). Síntomas presentados: dolor abdominal (86%), vómitos (42%) y náuseas (34%), con anemia, azoemia, hiperglicemia hipoalbuminemia e hiponatremia. Los cultivos microbiológicos positivos fueron 59%; y los patógenos identificados fueron Candida tropicalis (9,6%), Staphylococcus epidermidis (8,2%), y Enterococcus faecalis y Staphylococcus haemolyticus (6,8% cada uno), asociados con elevación de leucocitos, azoemia y celularidad alta en el líquido peritoneal (p < 0,05). Conclusiones: El principal microorganismo determinado fue de origen fúngico asociado a leucocitos, azoemia y celularidad alta.
- Published
- 2018
34. Environmental diagnosis of an urban basin from a social–ecological perspective
- Author
-
Cortelezzi, Agustina, primary, Barranquero, Rosario S., additional, Marinelli, Claudia B., additional, Fernández San Juan, M. Rocío, additional, and Cepeda, Rosana E., additional
- Published
- 2019
- Full Text
- View/download PDF
35. Differential regional decline in dopamine receptor availability across adulthood: Linear and nonlinear effects of age
- Author
-
Seaman, Kendra L., primary, Smith, Christopher T., additional, Juarez, Eric J., additional, Dang, Linh C., additional, Castrellon, Jaime J., additional, Burgess, Leah L., additional, San Juan, M. Danica, additional, Kundzicz, Paul M., additional, Cowan, Ronald L., additional, Zald, David H., additional, and Samanez‐Larkin, Gregory R., additional
- Published
- 2019
- Full Text
- View/download PDF
36. [Clinical and microbiological aspects of peritonitis associated with peritoneal dialysis in adult patients with chronic renal failure in the Emergency Department]
- Author
-
Pablo, San Juan M, Angélica, Pérez J, and Cornelio, Barrientos A
- Subjects
Male ,Time Factors ,Infant, Newborn ,Infant ,Middle Aged ,Peritonitis ,Cross-Sectional Studies ,Risk Factors ,Child, Preschool ,Humans ,Kidney Failure, Chronic ,Female ,Emergency Service, Hospital ,Peritoneal Dialysis ,Retrospective Studies - Abstract
Peritonitis is the most important and frequent complication of peritoneal dialysis (PD). Bacterial infections are responsible in most cases, with characteristic symptoms.To determine the most frequent pathogens in peritonitis associated with PD in patients with chronic renal failure (CRF). Methodos: Retrospective, descriptive, cross-sectional and observational study of patients with peritonitis in PD with CRF of the emergency department, between July 2012 and June 2013. Sociodemographic, diagnostic, clinical and microbiological and cellular data were evaluated from the patient's fluid. Dialysis.From 73 reviewed records, 52% were male. The primary cause of CRF was diabetes mellitus type 2 (67%). Symptoms presented: abdominal pain (86%), vomiting (42%) and nausea (34%), with anemia, azotemia, hyperglycemia, hypoalbuminemia and hyponatremia. The positive microbiological cultures were 59%; and the pathogens identified were Candida tropicalis (9.6%), Staphylococcus epidermidis (8.2%), Enterococcus faecalis and Staphylococcus haemolyticus (6.8% each one), associated with elevated leukocytes, azotemia and high cellularity in peritoneal fluid (p0.05).The main microorganism determined was of fungal origin associated with leukocytes, azotemia and high cellularity.
- Published
- 2017
37. Evaluación de tusa y cáscara de maíz como sustratos para el cultivo de Pleurotus pulmonarius
- Author
-
Infante, C., Cuadrado, B., de Arco, D., Perez, K., Barrera, E., and San Juan, M.
- Subjects
hongos comestibles ,corn husk ,edible mushrooms ,corncob ,agroindustrial wastes ,residuos agroindustriales ,cáscara de maíz ,tusa de maíz - Abstract
Production of edible mushrooms using agroindustrial waste as substrate is an example of a process that degrades organic matter through enzymatic action to form useful products for human consumption. Pleurotus pulmonarius culture was studied to evaluate the performance of two agro-industrial wastes. The substrates were corncob and corn husk, which underwent treatment, sterilization, inoculation and incubation under controlled conditions. The mycelium growth time for the cob was 36 days, whereas for the husk was 44 days; there was no significant difference in the biological efficiency, yield and protein content for both substrates. Microbiological analysis showed that the product has a quality suitable for human consumption. From the above results it was concluded that organic wastes corncob and corn husk are suitable for growth, colonization, formation of mycelium and fruiting bodies of P. pulmonarius. La producción de hongos comestibles utilizando residuos agroindustriales como sustrato es un ejemplo de un proceso que degrada la materia orgánica, mediante la acción enzimática, @para formar productos útiles para el consumo humano. Se estudió el cultivo de la seta Pleurotus pulmonarius, para evaluar su comportamiento en dos residuos agroindustriales. Los sustratos fueron tusa y cáscara de maíz, los cuales se sometieron a tratamiento, esterilización, inoculación e incubación bajo condiciones controladas. El tiempo de crecimiento del micelio para la tusa fue de 36 días, mientras que para la cáscara fue de 44 días. No hubo diferencias significativas en la eficiencia biológica, rendimiento y porcentaje de proteína para ambos sustratos. El análisis microbiológico reflejó que el producto tiene una calidad adecuada para el consumo humano. A partir de los resultados anteriores se pudo concluir que los residuos orgánicos tusa y cáscara de maíz son adecuados para el crecimiento, colonización e invasión del micelio y formación de cuerpos fructíferos de P. pulmonarius.
- Published
- 2017
38. Lack of consistent sex differences in d-amphetamine-induced dopamine release measured with [18F]fallypride PET
- Author
-
Smith, Christopher T., primary, Dang, Linh C., additional, Burgess, Leah L., additional, Perkins, Scott F., additional, San Juan, M. Danica, additional, Smith, Darcy K., additional, Cowan, Ronald L., additional, Le, Nam T., additional, Kessler, Robert M., additional, Samanez-Larkin, Gregory R., additional, and Zald, David H., additional
- Published
- 2018
- Full Text
- View/download PDF
39. Differential regional decline in dopamine receptor availability across adulthood: Linear and nonlinear effects of age
- Author
-
Seaman, Kendra L., primary, Smith, Christopher T., additional, Juarez, Eric J., additional, Dang, Linh C., additional, Castrellon, Jaime J., additional, Burgess, Leah L., additional, Danica San Juan, M., additional, Kundzicz, Paul M., additional, Cowan, Ronald L., additional, Zald, David H., additional, and Samanez-Larkin, Gregory R., additional
- Published
- 2018
- Full Text
- View/download PDF
40. P075 Inflammation-induced cancer vs. cancer-induced inflammation is dependent on S1P lyase
- Author
-
Schwiebs, A, primary, Herrero San Juan, M, additional, Wiercinska, E, additional, Anlauf, M, additional, Ottenlinger, F, additional, Schmidt, K, additional, Thomas, D, additional, Elwakeel, E, additional, Weigert, A, additional, Bönig, H, additional, Scholich, K, additional, Geisslinger, G, additional, Pfeilschifter, J, additional, and Radeke, H, additional
- Published
- 2018
- Full Text
- View/download PDF
41. Aspectos clínicos y microbiológicos de la peritonitis asociada a diálisis peritoneal en pacientes adultos con insuficiencia renal crónica en el Servicio de Urgencias
- Author
-
San Juan M., Pablo, primary, Pérez J., Angélica, additional, and Barrientos A., Cornelio, additional
- Published
- 2018
- Full Text
- View/download PDF
42. Partial-volume correction increases estimated dopamine D2-like receptor binding potential and reduces adult age differences
- Author
-
Smith, Christopher T, primary, Crawford, Jennifer L, additional, Dang, Linh C, additional, Seaman, Kendra L, additional, San Juan, M Danica, additional, Vijay, Aishwarya, additional, Katz, Daniel T, additional, Matuskey, David, additional, Cowan, Ronald L, additional, Morris, Evan D, additional, Zald, David H, additional, and Samanez-Larkin, Gregory R, additional
- Published
- 2017
- Full Text
- View/download PDF
43. 6P - Prognostic significance of tumour-infiltrating lymphocytes on survival outcomes of patients with resected pancreatic ductal adenocarcinoma: A systematic review and meta-analysis
- Author
-
Tan, H.N., Catedral, L.I., and San Juan, M.
- Published
- 2019
- Full Text
- View/download PDF
44. Evaluación de la citotoxicidad de una mezcla de ocho contaminantes a concentraciones de relevancia ambiental
- Author
-
Pérez Martín, J.M., Fernández Freire, Paloma, Peropadre López, Ana, Hazen De San Juan, M. José, UAM. Departamento de Biología, and Toxicología Celular (EXP C-103)
- Subjects
Emerging contaminants ,In vitro studies ,Long-term cytotoxicity ,Biología y Biomedicina / Biología ,Chemical mixtures - Abstract
The ubiquitous presence of pollutants and the accurate evaluation of their potential risks for environmental and human health is an area of major concern. We have simulated an in vitro scenario of long-term exposure to a mixture of eight pollutants at real environmental concentrations using mammalian Vero cells. Our results demonstrate that cellular proliferation rates were significantly altered, either by inhibition or stimulation, depending on the mixture composition and the exposure time. We encourage the urgency of reviewing safety levels for emerging contaminants accepted by regulatory agencies, considering that mixtures of pollutants represent a threat for environmental and human health, This work was supported by grants from the Spanish Ministry of Science and Innovation (CTM2008-00311; CTM2012-31344)
- Published
- 2015
45. Lack of consistent sex differences in D-amphetamine-induced dopamine release measured with [18F]fallypride PET.
- Author
-
Smith, Christopher T., Dang, Linh C., Burgess, Leah L., Perkins, Scott F., San Juan, M. Danica, Smith, Darcy K., Cowan, Ronald L., Le, Nam T., Kessler, Robert M., Samanez-Larkin, Gregory R., and Zald, David H.
- Subjects
AMPHETAMINES ,DOPAMINE agents ,POSITRON emission tomography ,ANATOMY - Abstract
Rationale: Sex differences in the dopaminergic response to psychostimulants could have implications for drug abuse risk and other psychopathology involving the dopamine system, but human data are limited and mixed.Objectives: Here, we sought to investigate sex differences in dopamine release after oral D-amphetamine administration.Methods: We used [
18 F]fallypride positron emission tomography (PET) to measure the change in dopamine D2/3 receptor availability (%ΔBPND , an index of dopamine release) between placebo and D-amphetamine sessions in two independent datasets containing a total of 39 females (on either hormonal birth control n = 18, postmenopausal n = 10, or studied in the first 10 days of their menstrual cycle n = 11) and 37 males.Results: Using both a priori anatomical regions of interest based on previous findings and voxelwise analyses, we failed to consistently detect broad sex differences in D-amphetamine-induced dopamine release. Nevertheless, there was limited evidence for greater right ventral striatal dopamine release in young adult males relative to similarly aged females, but this was not consistently observed across samples. Plasma estradiol did not correlate with dopamine release and this measure did not differ in females on and off hormonal birth control.Conclusions: While our finding in young adults from one dataset of greater %ΔBPND in males is partially consistent with a previously published study on sex differences in D-amphetamine-induced dopamine release, our data do not support the presence of consistent widespread sex differences in this measure of dopamine release. [ABSTRACT FROM AUTHOR]- Published
- 2019
- Full Text
- View/download PDF
46. EFICACIA Y SEGURIDAD DEL MANEJO ENDOSCÓPICO DE LOS PÓLIPOS COLÓNICOS NO PEDICULADOS MAYORES DE 2 CM EN UN HOSPITAL DE TERCER NIVEL
- Author
-
San Juan, M, primary, Redondo, I, additional, Muñoz, M, additional, García, D, additional, Amorós, A, additional, Borque, P, additional, Bennemann, P, additional, Navazo, L, additional, Arguiñarena, X, additional, and Morales, S, additional
- Published
- 2016
- Full Text
- View/download PDF
47. Migration of romanians in Spain: social, cultural and educative intervention
- Author
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Carrascal-Domínguez, S., Hernandez-Sampelayo Matos, M., and San Juan, M.
- Subjects
education ,Ciencias de la Educación ,social perception ,romanians ,migration ,innovation - Abstract
Migration has been a constant theme in human life throughout history, until it began to be considered at the beginning of the century as one of the most important problems in the world from a social, economic, politic and cultural point of view. This shift influences economic growth and social welfare as much as in emigrant as in immigrant countries. Nowadays, 200 million people are living outside their country of origin, something that consists of nearly 3% of the total world population. In the last years, and in parallel with the economic crisis, it has not been only considered as something cyclical and temporal, but it is also being recognized as one of the most important themes of the century, becoming one of the biggest causes for concern to this developed society. In this sense, the World Bank deals with the migration matter from a development perspective where Spain, because of its tradition and actual state, plays an important role. It is also a fundamental aspect of globalization and countries development, in which official organizations and institutions must implicate developing active politic proposals related to an improvement of these citizens quality of life. In this sense, the project Migration of Romanians in Spain: social, cultural and educative intervention lead by the GdI: Culture, Society and Education from Camilo Jose University and in collaboration with the Ecological University of Bucharest of Romania Teacher Training Department is tending to establish some strategic lines of action to help plural and socially responsible education aimed at forming children and immigrant families which are in our educative centers classrooms.
- Published
- 2012
48. First results of rearing Solea senegalensis (Kaup, 1858) larvae using a co-feeding regime in Cantabria (northern Spain)
- Author
-
Chereguini-Fernández-Maquieira, M.O. (María del Olvido), Díez, J., Hera-San-Juan, M. (Mariano) de-la, and Mosquera-de-Arancibia, C. (Concha)
- Subjects
Lenguado senegalés ,larva ,supervivencia ,crecimiento ,coalimentación - Abstract
Se describen las primeras experiencias sobre el crecimiento y la supervivencia en larvas de Solea senegalensis (Kaup, 1858) en Cantabria (norte de España) utilizando un régimen que combina alimento vivo e inerte (coalimentación) que podría condicionar a las larvas a aceptar mejor una dieta comercial. La tasa de crecimiento en longitud y peso seco de las larvas fue similar desde el inicio del cultivo hasta el día 70. Las tasas parciales medias de crecimiento fueron 14,53 % en los días 0-22, 7,4 % en los días 22-43 y 4,76 % en los días 43-70, con mejor tasa de crecimiento durante los primeros 22 días. Se encontraron algunas diferencias significativas en longitud los días 26, 33, 39, 43 y 70. La tasa de supervivencia media a día 70 fue alta (81 %). La experiencia de destete comenzó el día 80, cuando el peso húmedo de cada larva era aproximadamente 100 mg. Previamente, las larvas fueron distribuidas en dos tipos de tanques: tanques alargados S, de 3 m² de planta y 450 l de capacidad, y tanques circulares LE, de 1,54 m² y 430 l, a una densidad de aproximada de 1 000-1 500 larvas/ m². Al final del destete se encontraron diferencias significativas en longitud y peso entre las larvas destetadas en los dos tipos de tanques. En conclusión, estos primeros resultados del cultivo de S. senegalensis en Cantabria, realizado a temperatura ambiente y en una zona geográfica diferente a la natural de esta especie, indican las buenas perspectivas que ofrece S. senegalensis como especie alternativa en la acuicultura de esta zona, ya que es bien aceptada por los consumidores y tiene un valor comercial elevado. The present paper describes the first trials in Cantabria (northern Spain) on the larval growth and survival of Solea senegalensis (Kaup, 1858), involving co-feeding with live and inert feed, which could condition larvae to better accept a commercial diet. The larval growth rate, in terms of length and dry weight, was similar up to day 70. The average partial growth rates during different time intervals break down as 14.53 % from days 0-22; 7.4 % from days 22-43; and 4.76 % from days 43-70, with the first 22 days of growth clearly being the most important period. Some significant differences in length were found on days 26, 33, 39 and 43. The average survival rate was high (81 %) at day 70. Weaning trial began on day 80, when the larvae had reached a wet weight of approximately 100 mg. Previously, the larvae had been redistributed into two kinds of tanks: elongated S tanks (450 l, 3 m²), and circular LE tanks (430 l, 1.54 m²), stocked at a density of approximately 1 000-1 500 larvae/ m². At the end of weaning, significant differences were observed in length and wet weight between larvae weaned in the two kinds of tanks. In sum, these first results of breeding S. senegalensis in Cantabria, obtained at ambient temperature in a geographical setting different from the species's native range, indicate that S. senegalensis has good prospects as an alternative species for the region's aquaculture operations, since it is well accepted by consumers and enjoys a high market value. Instituto Español de Oceanografía
- Published
- 2007
49. First results of rearing Solea senegalensis (Kaup 1958) larvae in Cantabria (Northern Spain)
- Author
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Chereguini-Fernández-Maquieira, M.O. (María del Olvido), Díez, J., and Hera-San-Juan, M. (Mariano) de-la
- Subjects
Centro Oceanográfico de Santander ,Acuicultura - Abstract
The present paper describes the first trials in Cantabria (northern Spain) on the larval growth and survival of Solea senegalensis (Kaup, 1858), involving co-feeding with live and inert feed, which could condition larvae to better accept a commercial diet. The larval growth rate, in terms of length and dry weight, was similar up to day 70. The average partial growth rates during different time intervals break down as 14.53% from days 0-22; 7.4% from days 22-43; and 4.76% from days 43-70, with the first 22 days of growth clearly being the most important period. Some significant differences in length were found on days 26, 33, 39 and 43. The average survival rate was high (81%) at day 70. Weaning trial began on day 80, when the larvae had reached a wet weight of approximately 100 mg. Previously, the larvae had been redistributed into two kinds of tanks: elongated S tanks (450 l, 3 m2), and circular LE tanks (430 l, 1.54 m2), stocked at a density of approximately 1000-1500 larvae/m2. At the end of weaning, significant differences were observed in length and wet weight between larvae weaned in the two kinds of tanks. In sum, these first results of breeding S. senegalensis in Cantabria, obtained at ambient temperature in a geographical setting different from the species’s native range, indicate that S. senegalensis has good prospects as an alternative species for the region’s aquaculture operations, since it is well accepted by consumers and enjoys a high market value., Sí
- Published
- 2007
50. Persistencia de un trastorno por déficit de yodo tras la introducción de sal yodada en un área con antecedentes de bocio endémico
- Author
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Isidro San Juan, M. L., Vidal Casariego, A., Argüeso Armesto, R., Álvarez Castro, P., Vidal Pardo, J. I., and Cordido Carballido, F.
- Subjects
Thyrotoxicosis ,Endemic goiter ,Bocio endémico ,Iodized salt ,Tirotoxicosis ,Iodine deficiency ,Déficit de yodo ,Sal yodada ,Toxic nodular goiter ,Bocio nodular tóxico - Abstract
Objetivo: La corrección del déficit de yodo disminuye en la incidencia de bocio nodular tóxico. El fin de este estudio es determinar la etiología de la tirotoxicosis en dos áreas de Galicia con diferente prevalencia de bocio, 15 años después de la campaña institucional para el uso de sal yodada. Los resultados actuales fueron comparados con los de un estudio similar realizado en las mismas áreas hace 10 años. Métodos: Se incluyeron 202 pacientes con tirotoxicosis atendidos en La Coruña (costa) y Lugo (interior) desde enero de 2000 a mayo de 2002. Se les realizó historia clínica y exploración física, y se determinaron hormonas tiroideas, anticuerpos antitiroideos e inmunoglobulina estimuladora de tiroides. Se realizó también gammagrafía tiroidea con 99m tecnecio o 123yodo. Resultados: En el grupo completo el 58,6% de los casos fueron diagnosticados de bocio nodular tóxico; el 30,3%, de enfermedad de Graves; el 7.1%, de tirotoxicosis inducida por yodo y el 3,5% de tiroiditis subaguda. En la zona costera los porcentajes fueron 52,2, 37,0, 5,4 y 4,3%, respectivamente. En la zona de interior el 64,2% fueron diagnosticados de bocio nodular tóxico; el 24,5%, de Enfermedad de Graves; el 8,5%, de tirotoxicosis por yodo y el 2,8% de tiroiditis agudas. En todos los grupos el diagnóstico más frecuente fue bocio nodular tóxico. Conclusiones: En determinadas áreas de Galicia el bocio nodular tóxico continúa siendo la causa más frecuente de tirotoxicosis. Es necesario insistir en la aplicación y seguimiento de los programas de suplementación con yodo. Objective: Correction of iodine deficiency diminishes the incidence of toxic nodular goitre. The aim of this study was to assess the etiology of thyrotoxicosis in two areas with different goitre prevalence in Galicia, fifteen years after the institutional campaign of salt iodination. Results of the present survey are compared with those from a study performed ten years ago. Methods: Two hundred and two thyrotoxic patients attended in La Coruña (coastal zone) and Lugo (inland zone) from January 2000 to May 2002 were included. Clinical and exploratory data were recorded. Thyroid hormones, thyroid-directed antibodies and thyroid stimulating immunoglobulin (TSI) were measured. A thyroid 99m technetium or 123 iodine scintigram was performed. Results: In the whole group 58.6% of the cases were diagnosed of nodular goitre, 30.3% of Graves' disease, 7.1% of iodine induced thyrotoxicosis and 3.5% of subacute thyroiditis. In coastal zone these percentages were 52.2, 37.0, 5.4 and 4.3%, respectively. In the inland area, 64.2% nodular goitre, 24.5% Graves' disease, 8.5% iodine induced thyrotoxicosis and 2.8% subacute thyroiditis. The most frequent diagnosis in both the whole group and in each area was toxic multinodular goitre. Conclusions: In some areas of Spain, toxic nodular goitre continues to be the most frequent cause of thyrotoxicosis. It is necessary to insist on implementation and monitoring of iodine supplementation programs.
- Published
- 2004
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