Significado de las ofiolitas neoproterozoicas en la Cordillera Oriental del Perú

Los cinco trabajos precedentes (Rodrigues et al. 2010, a y b, Tassinari et al. 2010, Castroviejo et al. 2010 b, Willner et al. 2010) han tratado distintos aspectos de los terrenos ultramáficos conocidos en la COr, Cordillera Oriental, cuya ubicación, destacada en rojo, puede encontrarse en la figura 1. Es el momento de intentar una síntesis que, mediante la integración y la discusión de los resultados hasta ahora obtenidos, permita alcanzar una interpretación y, al menos, esbozar respuestas a algunas cuestiones fundamentales acerca del basamento pre-andino de la Cordillera. En primer lugar es pertinente examinar, a la vista de los nuevos datos presentados, la cuestión esencial: ¿se trata realmente de ofiolitas? Luego, habrán de plantearse cuestiones como el emplazamiento y la historia geológica de los terrenos implicados, en el marco de la evolución del supercontinente Rodinia y de la Cadena Andina, para finalmente tratar de comprender su significado geotectónic

Significado de las ofiolitas neoproterozoicas en la Cordillera Oriental del Perú

Los cinco trabajos precedentes (Rodrigues et al. 2010, a y b, Tassinari et al. 2010, Castroviejo et al. 2010 b, Willner et al. 2010) han tratado distintos aspectos de los terrenos ultramáficos conocidos en la COr, Cordillera Oriental, cuya ubicación, destacada en rojo, puede encontrarse en la figura 1. Es el momento de intentar una síntesis que, mediante la integración y la discusión de los resultados hasta ahora obtenidos, permita alcanzar una interpretación y, al menos, esbozar respuestas a algunas cuestiones fundamentales acerca del basamento pre-andino de la Cordillera. En primer lugar es pertinente examinar, a la vista de los nuevos datos presentados, la cuestión esencial: ¿se trata realmente de ofiolitas? Luego, habrán de plantearse cuestiones como el emplazamiento y la historia geológica de los terrenos implicados, en el marco de la evolución del supercontinente Rodinia y de la Cadena Andina, para finalmente tratar de comprender su significado geotectónic

REM-associated sleep apnoea: prevalence and clinical significance in the HypnoLaus cohort

This study determined the prevalence of rapid eye movement (REM) related sleep-disordered breathing (REM-SDB) in the general population and investigated the associations of REM-SDB with hypertension, metabolic syndrome, diabetes and depression.Home polysomnography (PSG) recordings (n=2074) from the population-based HypnoLaus Sleep Cohort (48.3% men, 57±11 years old) were analysed. The apnoea-hypopnoea index was measured during REM and non-REM sleep (as REM-AHI and NREM-AHI, respectively). Regression models were used to explore the associations between REM-SDB and hypertension, diabetes, metabolic syndrome and depression in the entire cohort and in subgroups with NREM-AHI <10 events·h <sup>-1</sup> and total AHI <10 events·h <sup>-1</sup> The prevalence of REM-AHI ≥20 events·h <sup>-1</sup> was 40.8% in the entire cohort. An association between increasing REM-AHI and metabolic syndrome was found in the entire cohort and in both the NREM-AHI and AHI subgroups (p-trend=0.014, <0.0001 and 0.015, respectively). An association was also found between REM-AHI ≥20 events·h <sup>-1</sup> and diabetes in both the NREM-AHI <10 events·h <sup>-1</sup> (odds ratio (OR) 3.12 (95% CI 1.35-7.20)) and AHI <10 events·h <sup>-1</sup> (OR 2.92 (95% CI 1.12-7.63)) subgroups. Systolic and diastolic blood pressure were positively associated with REM-AHI ≥20 events·h <sup>-1</sup> REM-SDB is highly prevalent in our middle-to-older age sample and is independently associated with metabolic syndrome and diabetes. These findings suggest that an increase in REM-AHI could be clinically relevant

Dimensionality and reliability of the online version of the Patient Health Questionnaire-4 (PHQ-4) in a large Colombian sample : Results from the PSY-COVID study

Altres ajuts: acords transformatius de la UABThe Patient Health Questionnaire-4 (PHQ-4) is an ultra-brief screening instrument to measure depressive and anxiety symptoms. This study evaluated the dimensionality and reliability of the online version of the PHQ-4 in a large sample of the general population in Colombia. Data were collected during the first phase of lockdown measures occasioned by the COVID-19 pandemic. A total of 18,061 adult participants completed the online version of the PHQ-4. The characteristics of the items and subscales were explored. Dimensionality was examined using confirmatory factor analysis (CFA), including an examination of invariance (configural, metric, and scalar) across socio-demographic characteristics. Reliability indices were computed and known-groups validity was addressed by estimating associations between PHQ-4 scores and socio-demographic characteristics. The CFA showed significantly adequate fit indices for the expected two-factor structure, being invariant across gender, age, income level, education level, and region. Internal consistency was satisfactory for the PHQ-2 (α =.83), the GAD-2 (α =.79), and the PHQ-4 (α =.86). Higher scores on depressive (PHQ-2), anxiety (GAD-2), and psychological distress (PHQ-4) symptoms in females and young people, and those respondents with lower income, unemployed, and lower level of education were observed. The findings indicate that the PHQ-4 is a reliable scale for depressive and anxiety symptoms among adult Colombian people, being recommendable this tool for online surveys

Psychometric properties of the online version of the Patient Health Questionnaire-4 in a large Colombian sample : results from the PSY-COVID study

Objectives: The Patient Health Questionnaire-4 (PHQ-4) is a short screening instrument to measure depressive and anxious symptoms. This study evaluated the psychometric properties of the online version of the PHQ-4 in a large sample of the general population in Colombia. Methods: Data were collected during the first phase of mobility restrictions occasioned by the COVID-19 pandemic. A total of 18'061 adult participants completed the online version of the PHQ-4. The characteristics of the items and subscales were explored. Dimensionality was examined using confirmatory factor analysis (CFA), including an examination of factor invariance across gender and age. Reliability indices were computed and known-groups validity was addressed by estimating associations between PHQ-4 scores and socio-demographic characteristics. Results: The CFA showed high fit indices for the expected two-factor structure, being invariant across gender and age. Internal consistency was satisfactory for PHQ-2 (α = .83), GAD-2 (α = .79), and PHQ-4 (α = .86). We observed higher scores on depression (PHQ-2), anxiety (GAD-2), and distress (PHQ-4) in women and young people, and those respondents with lower income, unemployed, and lower level of education. Conclusion: The findings indicate that the PHQ-4 is a reliable and valid screen for depression and anxiety among Colombian people, being recommendable this tool for online surveys

Caracterización de los sistemas de producción agropecuarios en los municipios de Granada y Cumaral - Meta.

Informe técnico elaborado con la participación directa de productores, gremios y entidades, en el que se presenta un conocimiento detallado de las condiciones biofísicas y aspectos socioeconómicos de dos municipios del departamento del Meta. A partir de información general del área de estudio, se analizan los componentes: socioeconómico, físico y biótico, se establecen las jerarquías de caracterización de los sistemas de producción agropecuarios, de determinan los resultados en términos de las unidades biofísicas de tierra, de los arreglos agropecuarios y de los sistemas tipo o modales, se analizan las circunstancias y aspectos de comercialización de las actividades agrícola y pecuaria, se detalla la capacidad de uso de los suelos, se describen los conflictos de usos y se definen los limitantes edáficos a la producción agropecuaria. Finalmente se consignan las recomendaciones pertinente

Maternal serum angiopoietin-like 3 levels in healthy and mild preeclamptic pregnant women

Objective: Angiopoietin-like protein 3(ANGPTL3) is an important regulator of lipoprotein metabolism in the fed state by inhibiting the enzyme lipoprotein lipase in oxidative tissues. However, the possible role of ANGPTL3 throughout gestation and its relationship with hormonal and biochemical variables are still unknown. The aim of this study was to determinate serum ANGPTL3 level in healthy non-pregnant women, during healthy and preeclamptic pregnancy and postpartum. Methods: Serum ANGPTL3 was analyzed by enzyme-linked immunosorbent assay (ELISA), in a prospective cohort of healthy pregnant women (n = 52) and women with mild preeclampsia (n = 21), and women at three months postpartum (n = 20) and healthy non-pregnant women (n = 20). The results obtained were correlated with biochemical, hormonal and anthropometric variables and insulin resistance indices. Results: Levels of ANGPTL3 were not different between the follicular and the luteal phases of the cycle in healthy non-pregnant women. There was a significant reduction in serum ANGPTL3 levels from the first to the third trimester in healthy pregnant women compared with healthy non-pregnant and postpartum women (p 0.05) Conclusions: We describe for the first time the profile of ANGPTL3 throughout pregnancy and postpartum as well as and discussed about explore their potential contribution interactions with lipoprotein metabolism throughout pregnancy and postpartum. Thus, low levels of ANGPTL3 during pregnancy might favor lipid uptake in oxidative tissues as the main maternal energy source, while may helping to preserve glucose for use by the fetus and placenta.Fil: Garces, María Fernanda. Universidad Nacional de Colombia; ColombiaFil: Rodriguez Navarro, Haiver Antonio. Universidad Nacional de Colombia; ColombiaFil: Buell Acosta, Julieth Daniela. Universidad Nacional de Colombia; ColombiaFil: Burgos Cardenas, Alvaro Javier. Universidad Nacional de Colombia; ColombiaFil: Franco Vega, Roberto. Universidad Nacional de Colombia; ColombiaFil: Maldonado Acosta, Luis Miguel. Universidad Nacional de Colombia; ColombiaFil: Eslava Schmalbach, Javier. Universidad Nacional de Colombia; ColombiaFil: Parada Baños, Arturo José. Universidad Nacional de Colombia; ColombiaFil: Castro Pinzon, Andres. Universidad Nacional de Colombia; ColombiaFil: Sanchez, Elizabeth. Universidad Nacional de Colombia; ColombiaFil: Angel Muller, Edith. Universidad Nacional de Colombia; ColombiaFil: Lacunza, Ezequiel. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Inmunológicas Básicas y Aplicadas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Castaño, Justo P.. Universidad de Córdoba; EspañaFil: Dieguez, Carlos. Universidad de Santiago de Compostela; EspañaFil: Nogueiras, Rubén. Universidad de Santiago de Compostela; EspañaFil: Ruiz Parra, Ariel Ivan. Universidad Nacional de Colombia; ColombiaFil: Caminos, Jorge Eduardo. Universidad Nacional de Colombia; Colombi

Disentangling the nature of the prototype radio weak BL Lac: Contemporaneous multifrequency observations of WISE J141046.00 + 740511.2

Context. The gamma-ray emitting source WISE J141046.00+740511.2 has been associated with a Fermi-LAT detection by crossmatching with Swift/XRT data. It has shown all the canonical observational characteristics of a BL Lac source, including a power-law, featureless optical spectrum. However, it was only recently detected at radio frequencies and its radio flux is significantly low. Aims. Given that a radio detection is fundamental to associate lower-energy counterparts to Fermi-LAT sources, we aim to unambiguously classify this source by performing a multiwavelength analysis based on contemporaneous data. Methods. By using multifrequency observations at the Jansky Very Large Array, Giant Metrewave Radio Telescope, Gran Telescopio Canarias, Gemini, William Herschel Telescope and Liverpool observatories, together with Fermi-LAT and Swift data, we carried out two kinds of analyses. On one hand, we studied several known parameters that account for the radio loudness or weakness characterization and their application to blazars (in general) and to our source (in particular). And, on the other hand, we built and analyzed the observed spectral energy distribution (SED) of this source to try to explain its peculiar characteristics. Results. The multiwavelength analysis indicates that WISE J141046.00+740511.2 is a blazar of the high-frequency peaked (HBL) type that emits highly polarized light and that is likely located at a low redshift. In addition, the one-zone model parameters that best fit its SED are those of an extreme HBL (EHBL); this blazar type has been extensively predicted in theory to be lacking in the radio emission that is otherwise typical of canonical gamma-ray blazars. Conclusions. We confirm that WISE J141046.00+740511.2 is indeed a highly polarized BL Lac of the HBL type. Further studies will be conducted to explain the atypical low radio flux detected for this source.Comment: accepted for publication in A&A, in pres