Origin, distribution, and potential risk factors associated with influenza A virus in swine in two production systems in Guatemala

Background: Guatemala is the country with the largest swine production in Central America; however, evidence of influenza A virus (IAV) in pigs has not been clearly delineated. Objectives: In this study, we analyzed the presence and spatial distribution of IAV in commercial and backyard swine populations. Methods: Samples from two nationwide surveys conducted in 2010 and 2011 were tested using virological (rRT-PCR and virus isolation) and serological (ELISA and hemagglutination inhibition) assays to detect IAV. Results: Influenza A virus was detected in 15.7% of the sampled pigs (30.6% of herds) in 2010 and in 11.7% (24.2% of herds) in 2011. The percentage of seropositive pigs was 10.6% (16.1% of herds) and 1.4% (3.1% of herds) for each year, respectively. Three pandemic H1N1 and one seasonal human-like H3N2 viruses were isolated. Antibodies against viruses from different genetic clusters were detected. No reassortant strains with swine viruses were detected. The H3N2 virus was closely related to human viruses that circulated in Central America in 2010, distinct to the most recent human seasonal vaccine lineages. Spatial clusters of rRT-PCR positive herds were detected each year by scan statistics. Conclusions: Our results demonstrate circulation of IAV throughout Guatemala and identify commercial farms, animal health status, and age as potential risk factors associated with IAV infection and exposure. Detection of human-origin viruses in pigs suggests a role for humans in the molecular epidemiology of IAV in swine in Guatemala and evidences gaps in local animal and human surveillance

Sorption of fluorinated greenhouse gases in silica-supported fluorinated ionic liquids

the contracts of Individual Call to Scientific Employment Stimulus 2020.00835.CEECIND (J.M.M.A.) / 2021.01432.CEECIND (A.B.P.), the Norma Transitória DL 57/2016. Publisher Copyright: © 2022 The Authors.The Kigali Amendment to the Montreal Protocol limits the global use of fluorinated greenhouse gases (F-gases) and encourages the development of a new generation of refrigerants with lower global warming potential. Therefore, there is a need to develop efficient and sustainable technologies to selectively capture and recycle the F-gases as new environmentally sustainable refrigerants. Here, ionic liquids (ILs) with high F-gas uptake capacity and selectivity were supported on silica and their potential as media for selective F-gas sorption was studied. For this purpose single-component sorption equilibria of difluoromethane (R-32), pentafluoroethane (R-125), and 1,1,1,2-tetrafluoroethane (R-134a) were measured at 303.15 K by gravimetry. The sorption data were successfully correlated using classical models of sorption thermodynamics. The results show that the IL supported in the porous volume and on the external surface of the porous silica controls the F-gas uptake in the composites and that changing the IL's cations and anions allows fine-tuning the selectivity of the sorption process. This work brings crucial knowledge for the development of new materials based on ILs for the selective sorption of F-gases.publishersversionpublishe

Absorption of Fluorinated Greenhouse Gases Using Fluorinated Ionic Liquids

funding of the KET4F-Gas project, SOE2/P1/P0823, co -funded by the Interreg Sudoe Programme through the European Regional Development Fund (ERDF). FCT/MCTES for financial support through IF/00190/2014 , IF/00210/2014 financial support through the Norma TransitOria DL 57/2016 Program Contract (FCT/MCTES). FCT/MCTES (UID/QUI/50006/2019).The increasing awareness of the environmental impact of fluorinated gases (F-gases) used in refrigeration is instigating the development of technologies to recover and recycle them. With this goal in mind, single-component absorption equilibrium isotherms at 303.15 K of F-gases in different ionic liquids (ILs) were determined using a gravimetric method. The selected F-gases are the most used in domestic refrigeration (R-32: difluoromethane, R-125: pentafluoroethane, and R-134a: 1,1,1,2-tetrafluoroethane). The results show that ILs containing a fluorinated alkyl side chain with four carbon atoms, that is, fluorinated ILs (FILs), have higher gas absorption capacity than conventional fluoro-containing ILs. All studied ILs showed ideal selectivity toward R-134a. Conventional fluoro-containing ILs showed better selectivities for the separation of the binary mixtures R-134a/R-125 and R-32/R-125, and FILs showed better selectivities for the R-134a/R-32 mixture. These results provide fundamental knowledge of the behavior of these new alternative solvents and key information for their application in the separation of F-gas mixtures of commercial refrigerants.authorsversionpublishe

Exploring the natural history of intrinsic capacity impairments: Longitudinal patterns in the 10/66 study

BACKGROUND: intrinsic capacity (IC) is a construct encompassing people\u27s physical and mental abilities. There is an implicit link amongst IC domains: cognition, locomotion, nutrition, sensory and psychological. However, little is known about the integration of the domains. OBJECTIVES: to investigate patterns in the presentation and evolution of IC domain impairments in low-and-middle-income countries and if such patterns were associated with adverse outcomes. METHODS: secondary analyses of the first two waves of the 10/66 study (population-based surveys conducted in eight urban and four rural catchment areas in Cuba, Dominican Republic, Puerto Rico, Venezuela, Peru, Mexico and China). We applied latent transition analysis on IC to find latent statuses (latent clusters) of IC domain impairments. We evaluated the longitudinal association of the latent statuses with the risk of frailty, disability and mortality, and tested concurrent and predictive validity. RESULTS: amongst 14,923 participants included, the four latent statuses were: high IC (43%), low deterioration with impaired locomotion (17%), high deterioration without cognitive impairment (22%), and high deterioration with cognitive impairment (18%). A total of 61% of the participants worsened over time, 35% were stable, and 3% improved to a healthier status.Participants with deteriorated IC had a significantly higher risk of frailty, disability and dementia than people with high IC. There was strong concurrent and predictive validity. (Mortality Hazard Ratio = 4.60, 95%CI 4.16; 5.09; Harrel\u27s C = 0.73 (95%CI 0.72;0.74)). CONCLUSIONS: half of the study population had high IC at baseline, and most participants followed a worsening trend. Four qualitatively different IC statuses or statuses were characterised by low and high levels of deterioration associated with their risk of disability and frailty. Locomotion and cognition impairments showed other trends than psychological and nutrition domains across the latent statuses

Diagnóstico territorial de los usos del suelo del distrito El Algarrobal

La cultura de la planificación en los países latinoamericanos todavía no se ha convertido en una política de Estado. En general en las diferentes escalas de gobierno nacional, provincial o municipal la organización del territorio es muy postergada, a tal punto que se podría afirmar que en muchos espacios es inexistente. En la Argentina, en Mendoza y en el municipio de Las Heras las situaciones son similares, y un ejemplo de la falta de planificación y control de las gestiones territoriales se refleja claramente en el distrito El Algarrobal de Las Heras. La pérdida de la calidad de vida de la población del lugar es evidente; sin embargo para elaborar propuestas de mejoramiento se ha dise- ñado un plan de trabajo que comprende la confección de un diagnóstico que permita identificar el comportamiento de algunas variables en la dinámica del espacio geográfico. Sus objetivos son construir el conocimiento del distrito El Algarrobal, haciendo un análisis-diagnóstico a través de las diferentes fuentes de información, relevamiento de datos, cartografía y correlación de variables

Exploring the potential of biomass-derived carbons for the separation of fluorinated gases with high global warming potential

Funding Information: The single-component adsorption isotherms of R-32, R-125, R-134a, SF6 and N2 on the four biomass-derived porous carbons were measured by gravimetry in an ISOSORP high-pressure magnetic-suspension balance (MSB, Rubotherm GmbH, Germany). Approximately 0.30\u20130.40 g of the solid porous materials were loaded into the adsorption cells and then degasified at 373.15 K for 9 h under vacuum. After degassing, the sample was put into contact with the gas at a given pressure and temperature until the recorded mass stabilized. An adsorption point is under thermodynamic equilibrium when there are no discernible changes in weight, pressure, and temperature. This process is repeated continuously until the maximum pressure is reached. Finally, depressurization is performed to measure desorption points and check that the desorption branch of the isotherm coincides with the adsorption branch. The process is completed when the difference between the initial weight and the weight of the material after degassing is equal to zero. The adsorption equilibrium data are reported as excess adsorption, qex [28,30]; the corresponding values of total adsorption, q, determined from the experimental are reported in Tables S1\u2013S3 in the Supporting Information, SI. Finally, the adsorption-desorption equilibrium data were fitted using the isothermal dual-site Langmuir (DSL) model [ 54\u201356]. The parameters of the DSL model are shown in Tables S4 and S5 of SI.The authors acknowledge the financial support from the European Union's Horizon Europe research and innovation programme under grant agreement No 101082048\u2013- the MAR2PROTECT project. This work was also financed by national funds from FCT/MCTES (Portugal) through CEECIND/004431/2022 (I.M.), and the Norma Transitória DL 57/2016 Program Contract (R.P.P.L.R. and M.B.). Publisher Copyright: © 2024 The AuthorsThe development of advanced and innovative biomaterials with porous structural characteristics for the capture of fluorinated gases (F-gases) is important to contribute to the reduction of emissions of these gases with very high global warming potential. In this work, four biocarbons (CC-1:3H3PO4, CC-1:1H3PO4, CC-K2CO3 and CC-CO2) were produced by chemical and physical activation of corn cob biomass (CC). The adsorption equilibria of difluoromethane (R-32), pentafluoroethane (R-125), 1,1,1-tetrafluoroethane (R-125), 1,1,2-tetrafluoroethane (R-134a), sulphur hexafluoride (SF6), and nitrogen (N2) on these biocarbons were determined at 303.15 K. The highest adsorption capacities were obtained for CC-K2CO3 and CC-CO2 and a full characterization was also performed for these biomaterials at 283.15 and 323.15 K. On the other hand, the selectivities of SF6/N2 and the commercial refrigerants R-410A, R-407C, and R-407F were estimated using the Ideal Adsorption Solution theory (IAST). The results obtained for SF6/N2 show that the biocarbon CC-K2CO3 stands out from the other materials. In addition, the CC-CO2 shows a preference for R-32 over R-125 for the separation of the R-410A. Finally, CC-K2CO3 has a greater preference for R-134a over R-32 and R-125 in the R-407C and R-407F blends. Overall, these novel biocarbons improve the separation and purification of the F-gases under study, facilitating their application on a pilot scale.publishersversionpublishe

Propuesta de microzonificación y usos de suelo en el distrito “El Algarrobal”, Las Heras, Mendoza

Las acciones que se realizan a través de gestiones territoriales, con normativas o decisiones políticas sobre espacios geográficos, sumado a la falta de control de parte del Estado, pueden provocar sobreexplotaciones que producen daños irreversibles y un desmejoramiento de la calidad de vida de la población del lugar. En algunos casos las consecuencias se advierten a largo plazo, pero en el distrito El Algarrobal la degradación es muy evidente, en un relativamente corto período espaciotemporal. Este marcado daño ambiental y territorial que se puede observar a simple vista, es lo que indujo a definirla como área de estudio, a fin de poder aportar propuestas de mejoras, para el desarrollo de las actividades del distrito, desde el sector cientí- fico, a los administradores del dominio público. Para elaborar propuestas se debe contar con estudios previos, imágenes de la zona y fundamentalmente con el conocimiento empírico obtenido por visitas y reconocimientos de los sectores del área del estudio

Cardiac tamponade and myocarditis in a patient with acute SARS-CoV-2 infection

Describimos una paciente con COVID-19, con derrame pericárdico, taponamiento cardíaco y depresión miocárdica grave. Mujer de 51 años, sin enfermedad previa, COVID-19 leve que presentó tres episodios de síncope en domicilio. El electrocardiograma mostró ritmo sinusal, ST de concavidad superior difuso 2 mv; en la tomografía se observó derrame pericárdico y parénquima pulmonar normal. Ingresó a terapia intensiva con shock y requerimiento de asistencia ventilatoria mecánica (AVM). En el ecocardiograma se observó derrame pericárdico y taponamiento; se realizó drenaje. El ecocardiograma transesofágico mostró deterioro moderado de función sistólica biventricular; strain longitudinal global –14.2%, Fey estimada: 43%; deformación global circunferencial: –10.1%. A los 7 días del ingreso, la tomografía reveló infiltrados bilaterales y engrosamiento pericárdico con realce post-contraste y derrame pericárdico leve. El día 12 posterior al ingreso, se suspendió el soporte inotrópico; y la paciente, hemodinámicamente estable, se desvinculó de la AVM.We describe a patient with COVID-19, with pericardial effusion, cardiac tamponade and severe myocardial depression. A 51-year-old woman, previously healthy, with mild COVID-19 presented with three episodes of syncope. She was admitted to the emergency room. An electrocardiogram showed sinus rhythm, diffuse superior concavity ST 2 mv; a CT scan showed pericardial effusion, without lung pathological findings. Due to shock, dyspnoea and encephalopathy, the patient was admitted to intensive care, where she received vasopressor support and mechanical ventilation. A bedside ultrasound showed pericardial effusion and tamponade; drainage was performed; transoesophageal ultrasound showed moderate deterioration of biventricular systolic function; global longitudinal strain –14.2%, estimated Fey 43%; global circumferential strain –10.1%. Seven days after admission, CT scan revealed bilateral infiltrates and pericardial thickening with post-contrast enhancement and mild pericardial effusion. On day 12 post admission, inotropic support was discontinued; patient on mechanical ventilation weaning and haemodynamically stable.Fil: Flores Cevallos, Samantha S.. Hospital Aleman; ArgentinaFil: Ruiz Martínez, Juan José. Hospital Aleman; ArgentinaFil: Duran, Ana L.. Hospital Aleman; ArgentinaFil: Roberti, Javier Eugenio. Hospital Aleman; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Sosa, Fernando A.. Hospital Aleman; Argentin

Concordance of the risk of neonatal respiratory morbidity assessed by quantitative ultrasound lung texture analysis in fetuses of twin pregnancies

To evaluate the concordance of the risk of neonatal respiratory morbidity (NRM) assessed by quantitative ultrasound lung texture analysis (QuantusFLM) between twin fetuses of the same pregnancy. Prospective study conducted in twin pregnancies. There was good concordance of the risk of NRM between twins 34.0 weeks. From 30.0 to 33.6 weeks 26.5% of the twin pairs had discordant results, with moderate concordance of the risk of NRM

Vacuum swing adsorption for R-32 recovery from R-410A refrigerant blend

The authors acknowledge the financial support from the LIFE-4-Fgases project [ LIFE20 CCM/ES/001748 ] funded by EU LIFE Programme . Norma Transitória DL 57/2016 Program Contract (R.P.P.L.R.). Publisher Copyright: © 2023 The Author(s)The recovery of high purity fluorinated gases from refrigerant blends is vital to promote a circular economy in the field of refrigeration and air conditioning. In this work, we evaluate the performance of a four-step Vacuum Swing Adsorption (VSA) process using activated carbon for the recovery of R-32 (difluoromethane) from a R-410A refrigerant blend: a binary mixture of R-125 (pentafluoroethane) and R-32 (yR−32=0.7; yR−125=0.3). Breakthrough curves were performed using dilute and bulk feed concentrations to determine mass and heat transfer parameters, which were then employed in simulations of fixed-bed adsorber dynamics. The mathematical model employed successfully predicts the experimental results of a four-step VSA cycle (feed, blowdown, purge, pressurization). The VSA performance was evaluated using process simulation. For a cycle time of 800 s (each step taking 200 s) and feed and regeneration pressures of 1.01 and 0.01 bar, respectively, R-32 is obtained with 97.0 mol-% purity and 30.9% recovery, with process productivity of 4.06 mol h−1 per kilogram of adsorbent, and energy consumption of 123.2 kJ/mol. Our results demonstrate the feasibility of using VSA processes for the recovery of R-32 from the near-azeotropic R-410A refrigerant blend.publishersversionpublishe