Sitios con "hornitos" del Holoceno tardío en el Chaco austral: Colonia Dolores, dpto. San Justo, pcia. de Santa Fe.

Los “hornitos de tierra cocida” son estructuras píricas subterráneas destinadas, fundamentalmente, a la cocción de alimentos. Asociadas al ambiente del Espinal, ecotono entre el Chaco y la Pampa, constituyen testimonios de recorridos pedestres que unían, en la llanura central argentina, las costas próximas al Paraná con el borde de las Salinas Grandes. Se los encuentra también en las provincias de Chaco y Formosa, Santiago del Estero y La Rioja. Son marcadores paisajísticos de primer orden, indicando la extensión del Espinal antes del cambio climático del 1000-800 a.p. En Colonia Dolores (Departamento San Justo, provincia de Santa Fe) se localizaron tres sitios con hornitos próximos a la desembocadura del arroyo Cayastá en el Saladillo Amargo. Se los relevó con GPS, se elaboró un mapa que integra éstos y otros conjuntos de hornos similares del departamento, y se realizaron fechados radiocarbónicos que los ubican en torno a los 1000 años a.p.The baked clay “hornitos” (small furnaces) are pyric subterranean structures designed primarily to cook food. Associated to the Spinal environment, ecotone between Chaco and Pampa, they constitute evidence that links the central plain of Argentina, the coasts near the Paraná and the edge of the Salinas Grandes. They are found in the provinces of Chaco and Formosa, Santiago del Estero and La Rioja. They are landscape markers of a first order, indicating the extent of the climate change Espinal before the 1000-800 b.p. In Colonia Dolores (Department San Justo, Santa Fe) three site hornitos are located next to the mouth of the Cayastá creek in the Saladillo Bitter creek. They were positioned with GPS, a map was developed that integrates these and other similar furnace sets in the department, and radiocarbon dating was performed, placing them around 1000 years b.p.Fil: Cornero, Silvia - Escuela de Antropología y Museo Universitario F. y C. Ameghino, FCEIA, UNR.Fil: del Río, Paula - Museo Universitario F. y C. Ameghino FCEIA, UNR.Fil: Ceruti, Carlos - CONICET, Museo Cs. Nat. y Antropológicas “Prof. A. Serrano” (Paraná)

Estudio comparativo de modelos de cálculo para el diseño de muros pantalla

Cuando se desea ejecutar un muro pantalla existen numerosas cuestiones a tener en cuenta. No se trata de una estructura común que pueda calcularse fácilmente y esperar un comportamiento similar a lo largo de su construcción y puesta en funcionamiento. Un muro pantalla es una compleja y elaborada sucesión de cálculos y fases que se redefinen y adaptan a medida que se ejecuta la estructura. En este artículo se va a estudiar cuál es la manera más adecuada y segura de poder elaborar un muro pantalla de forma que se pueda garantizar su puesta en funcionamiento, previendo los esfuerzos va a tener que soportar en cada momento de forma que su comportamiento sea el esperado. Para poder estudiar el comportamiento de un muro pantalla y la manera de abordar su diseño y posterior ejecución, en este artículo se ha querido evaluar un caso teórico con datos y características perfectamente posibles de manifestarse en un caso práctico.info:eu-repo/semantics/publishedVersio

Resveratrol and inflammatory bowel disease: the evidence so far

Despite the fact that inflammatory bowel disease (IBD) has still no recognised therapy, treatments which have proven at least mildly successful in improving IBD symptoms include anti-inflammatory drugs and monoclonal antibodies targeting pro-inflammatory cytokines. Resveratrol, a natural (poly)phenol found in grapes, red wine, grape juice and several species of berries, has been shown to prevent and ameliorate intestinal inflammation. Here, we discuss the role of resveratrol in the improvement of inflammatory disorders involving the intestinal mucosa. The present review covers three specific aspects of resveratrol in the framework of inflammation: (i) its content in food; (ii) its intestinal absorption and metabolism; and (iii) its anti-inflammatory effects in the intestinal mucosa in vitro and in the very few in vivo studies present to date. Actually, if several studies have shown that resveratrol may down-regulate mediators of intestinal immunity in rodent models, only two groups have performed intervention studies in human subjects using resveratrol as an agent to improve IBD conditions. The effects of resveratrol should be further investigated by conducting well-designed clinical trials, also taking into account different formulations for the delivery of the bioactive compound

Covid-19 overlapping with systemic sclerosis

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Measuring Population Transmission Potential for HIV: An Alternative Metric of Transmission Risk in Men who have Sex with Men (MSM) in the US

Background Various metrics for HIV burden and treatment success [e.g. HIV prevalence, community viral load (CVL), population viral load (PVL), percent of HIV-positive persons with undetectable viral load] have important public health limitations for understanding disparities. Methods and Findings Using data from an ongoing HIV incidence cohort of black and white men who have sex with men (MSM), we propose a new metric to measure the prevalence of those at risk of transmitting HIV and illustrate its value. …See full text for complete abstract

The food contaminant deoxynivalenol, decreases intestinal barrier permeability and reduces claudin expression

The gastrointestinal tract represents the first barrier against food contaminants as well as the first target for these toxicants. Deoxynivalenol (DON) is a mycotoxin that commonly contaminates cereals and causes various toxicological effects. Through consumption of contaminated cereals and cereal products, human and pigs are exposed to this mycotoxin. Using in vitro, ex vivo, and in vivo approaches, we investigated the effects of DON on the intestinal epithelium. We demonstrated that, in intestinal epithelial cell lines from porcine (IPEC-1) or human (Caco-2) origin, DON decreases trans-epithelial electric resistance (TEER) and increases in a time and dose-dependent manner the paracellular permeability to 4 kDa dextran and to pathogenic Escherichia Coli across intestinal cell monolayers. In pig explants treated with DON, we also observed an increased permeability of intestinal tissue. These alterations of barrier function were associated with a specific reduction in the expression of claudins, which was also seen in vivo in the jejunum of piglets exposed to DON-contaminated feed. In conclusion, DON alters claudin expression and decreases the barrier function of the intestinal epithelium. Considering that high levels of DON may be present in food or feed, consumption of DON-contaminated food/feed may induce intestinal damage and has consequences for human and animal health

JUMP-LANDING MECHANICS IN PATELLAR TENDINOPATHY IN ELITE JUNIOR BASKETBALL ATHLETES

The purpose of this study was to identify key modifiable jump-landing variables associated with patellar tendinopathy (PT). Thirty-six junior elite basketball players (18 men, 18 women) were recruited (8 PT, 11 controls, 17 excluded from statistical analysis). Three-dimensional (3D) landing technique during a stop-jump task and patellar tendon ultrasounds were recorded. A series of mixed-design factorial analyses of variance were used to determine any significant between-group differences. Athletes with PT utilised a lower ground reaction force (GRF) loading rate (LR) via increasing their time duration from initial foot-ground contact (IC) to peak vertical GRF (Fv). This strategy of a lower LR did not lead to those athletes with PT decreasing their peak GRF nor patellar tendon forces (FPT) in comparison to the controls

The Comparability of Men Who Have Sex With Men Recruited From Venue-Time-Space Sampling and Facebook: A Cohort Study

Background: Recruiting valid samples of men who have sex with men (MSM) is a key component of the US human immunodeficiency virus (HIV) surveillance and of research studies seeking to improve HIV prevention for MSM. Social media, such as Facebook, may present an opportunity to reach broad samples of MSM, but the extent to which those samples are comparable with men recruited from venue-based, time-space sampling (VBTS) is unknown. Objective: The objective of this study was to assess the comparability of MSM recruited via VBTS and Facebook. Methods: HIV-negative and HIV-positive black and white MSM were recruited from June 2010 to December 2012 using VBTS and Facebook in Atlanta, GA. We compared the self-reported venue attendance, demographic characteristics, sexual and risk behaviors, history of HIV-testing, and HIV and sexually transmitted infection (STI) prevalence between Facebook- and VTBS-recruited MSM overall and by race. Multivariate logistic and negative binomial models estimated age/race adjusted ratios. The Kaplan-Meier method was used to assess 24-month retention. Results: We recruited 803 MSM, of whom 110 (34/110, 30.9% black MSM, 76/110, 69.1% white MSM) were recruited via Facebook and 693 (420/693, 60.6% black MSM, 273/693, 39.4% white MSM) were recruited through VTBS. Facebook recruits had high rates of venue attendance in the previous month (26/34, 77% among black and 71/76, 93% among white MSM; between-race P=.01). MSM recruited on Facebook were generally older, with significant age differences among black MSM (P=.02), but not white MSM (P=.14). … See full text for complete abstract

South American vesicant beetles (Coleoptera: Meloidae). Studies on the andean genus Pseudomeloe Fairmaire and Germain

Pseudomeloe (Meloinae: Pyrotini) es un género endémico de la región andina de América del Sur, distribuido en Argentina, Bolivia, Brasil, Chile, Ecuador, Perú y Uruguay. El objetivo del presente trabajo fue actualizar el conocimiento del género, aportando datos sobre su biología, importancia económica, y mapas de distribución, asimismo, un catalogo de las especies válidas y nuevos datos dedistribución de las mismas. Se registran un total de 41 especies de Pseudomeloe para América del Sur, incorporando cuatro especies no catalogadas en Blackwelder (P. machadoi Germain, P. ogloblini Martínez,  P. titschacki Borchmann, y P. vianai Martínez) y se brindan mas de cien nuevos registros tanto a nivel provincial como nacional de Argentina, Bolivia, Brasil, Chile y Perú.Pseudomeloe (Meloinae: Pyrotini) is an endemic genus of the andean region of South America, distributed in Argentina, Bolivia, Brazil, Chile, Ecuador, Perú and Uruguay. The aim of this work was to update the knowledge of the genus, providing data on its biology, economic importance, distributions maps, and a catalogue of valid species with new distribution data. There were recorded a total of 41 species of Pseudomeloe from South America, fadding four non-cataloged species since Blackwelder (P. machadoi Germain, P. ogloblini Martínez, P. titschacki Borchmann, and P. vianai Martínez), and there were given more than a hundred new state/province and country records of Argentina, Bolivia, Brasil, Chile and Peru.Fil: Safenraiter, Melania Edith. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; ArgentinaFil: Campos Soldini, Maria Paula. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; ArgentinaFil: Fernández, Estrella Natalín. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; ArgentinaFil: del Rio, Maria Guadalupe. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Avaliação não invasiva da pressão venosa central por ecocardiografia em cuidados intensivos : particularidades nos doentes com dilatação do ventrículo direito e exacerbação de doença pulmonar crónica

Copyright © 2006 Sociedade Portuguesa de Pneumologia/SPP. Published by Elsevier España, S.L.Objectives: To determine the possibility of non-invasive estimation of central venous pressure (CVP) through inferior vena cava (IVC) analysis, using transthoracic echocardiography (TTE). Design: A prospective 3-year study. Setting: A 16-bed medical/surgical Intensive Care Unit (ICU). Methods: Patients admitted to the ICU were enrolled. CVP measurement and TTE (determining cardiac chambers dimension and left ventricular shortening fraction) with IVC analysis (maximum dimension and IVC index) were performed simultaneously. Parametric and non-parametric statistical analysis was performed to establish correlations between variables. Results: 560 patients were admitted to the study, including 477 in whom IVC was analysed, aging 62.2 ± 17.3 years, a mean ICU stay 11.9 ± 18.7 days, a APACHE II score 23.9 ± 8.9 and a SAPS II score 55.7 ± 20.4. Through linear regression analysis CVP was influenced by IVC index (p=0.001), IVC maximum dimension (p=0.013) and presence of mechanical ventilation (p=0.002). A statistically significant correlation was found between the following parameters: an IVC index13mmHg; an IVC index and a CVP 26%-50%; an IVC index >51% and CVP 20mm and a CVP >13mmHg; an IVC maximum dimension 7mmHg was observed, and in patients with chronic respiratory failure (who presented a high prevalence of right ventricular enlargement) a lack of agreement between IVC index >50% and CVP 13mmHg; índice da VCI entre 26 e 50% e PVC entre 8 e 12mmHg; índice da VCI> 51% e PVC> 7mmHg; dimensão máxima da VCI> 20mmHg e PVC> 13 mmHg; dimensão máxima da VCI> 10mm e PVC> 7mmHg. Nos doentes com dilatação do ventrículo direito (VD) observou-se uma relação mais fraca entre a PVC 50%. A dimensão máxima da VCI, mas não o seu índice, correlacionou-se com a dilatação do VD e AD. Conclusões: A análise da VCI por ETT revelou-se útil na avaliação qualitativa da PVC em doentes admitidos numa UCIP. Em doentes com dilatação do VD e admitidos por exacerbação de doença pulmonar crónica, os métodos avaliados não foram fidedignos para valores baixos de PVC. A dilatação da VCI traduz melhor a cronicidade da doença, enquanto o índice da VCI reflecte melhor o estado de volemia.info:eu-repo/semantics/publishedVersio