Atividade proteolítica e crescimento de matrinxã em natação sustentada e alimentado com dois níveis de proteína.

O objetivo deste trabalho foi avaliar o efeito da natação sustentada sobre a atividade digestiva proteolítica e o crescimento de juvenis de matrinxã (Brycon amazonicus), alimentados com dois níveis de proteína

Papel de la glucógeno sintetasa cinasa 3β (GSK-3β) en el pre y postacondicionamiento isquémicos en ratas hipertensas espontánea

Estudios recientes en animales normotensos muestran que la enzima glucógeno sintetasa cinasa 3β (GSK-3β) es una de las potenciales cinasas que pueden regular la formación y/o apertura del poro de transición mitocondrial (PTM). La GSK-3β es constitutivamente activa y es inactivada por fosforilación en Ser 9. En estas condiciones es capaz de interactuar con los principales componentes del PTM e impedir su apertura

Mono and bimetallic Cu-Ni structured catalysts for the water gas shift reaction

The water-gas shift (WGS) reaction over structured Cu, Ni, and bimetallic Cu-Ni supported on active carbon (AC) catalysts was investigated. The structured catalysts were prepared in pellets form and applied in the medium range WGS reaction. A good activity in the 180-350 °C temperature range was registered being the bimetallic Cu-Ni:2-1/AC catalyst the best catalyst. The presence of Cu mitigates the methanation activity of Ni favoring the shift process. In addition the active carbon gasification reaction was not observed for the Cu-containing catalyst converting the active carbon in a very convenient support for the WGS reaction. The stability of the bimetallic Cu-Ni:2-1/AC catalyst under continuous operation conditions, as well as its tolerance towards start/stop cycles was also evaluated.Ministerio de Economía y Competitividad ENE2013-47880-C3-2-

Análisis financiero para el plan estratégico para la compañía Jestar Ideas y Construcciones S.A.S a través de la aplicación de estándares de la Certificación B-Corps (Empresas B)

Evaluar la viabilidad de la acreditación como “Empresa B” para la organización “Jestar Ideas y Construcciones S.A.S.” mediante la aplicación y el análisis de herramientas financieras.En la actualidad la función social de las empresas parece estar restringida a la generación de utilidades, creando así valor solo para los accionistas, desconociendo la importancia que tiene el rol de la empresa como organización social de primer orden, la cual es una fuente generadora de empleo y que de manera sistémica contribuye al desarrollo humano, económico y ambiental de una nación. En este sentido el no incorporar dentro de la lógica corporativa la importancia de la ética, el bien común y la sostenibilidad ambiental en el core de negocio de las empresas repercute negativamente y en detrimento del desarrollo económico con efectos tales como lo es: la corrupción, el agotamiento de los recursos naturales y la contaminación ambiental, que a su vez se ve reflejado en la ampliación de la brecha social. El presente proyecto busca aplicar conocimientos gerenciales para el diseño de un plan estratégico, en una empresa de construcción y consultoría, con un enfoque que permita tomar como referencia la acreditación "Empresas B", cuyos estándares se centran en la generación de impacto social y ambiental positivo como propósito fundamental de la empresa y que por condición sean rentables

Análisis financiero para el plan estratégico para la compañía Jestar Ideas y Construcciones S.A.S a través de la aplicación de estándares de la Certificación B-Corps (Empresas B)

Evaluar la viabilidad de la acreditación como “Empresa B” para la organización “Jestar Ideas y Construcciones S.A.S.” mediante la aplicación y el análisis de herramientas financieras.En la actualidad la función social de las empresas parece estar restringida a la generación de utilidades, creando así valor solo para los accionistas, desconociendo la importancia que tiene el rol de la empresa como organización social de primer orden, la cual es una fuente generadora de empleo y que de manera sistémica contribuye al desarrollo humano, económico y ambiental de una nación. En este sentido el no incorporar dentro de la lógica corporativa la importancia de la ética, el bien común y la sostenibilidad ambiental en el core de negocio de las empresas repercute negativamente y en detrimento del desarrollo económico con efectos tales como lo es: la corrupción, el agotamiento de los recursos naturales y la contaminación ambiental, que a su vez se ve reflejado en la ampliación de la brecha social. El presente proyecto busca aplicar conocimientos gerenciales para el diseño de un plan estratégico, en una empresa de construcción y consultoría, con un enfoque que permita tomar como referencia la acreditación "Empresas B", cuyos estándares se centran en la generación de impacto social y ambiental positivo como propósito fundamental de la empresa y que por condición sean rentables

Homeostatic Response to Three Years of Experimental Warming Suggests High Intrinsic Natural Resistance in the Páramos to Warming in the Short Term

Páramos, tropical alpine ecosystems, host one of the world s most diverse alpine floras, account for the largest water reservoirs in the Andes, and some of the largest soil carbon pools worldwide. It is of global importance to understand the future of this extremely carbon-rich ecosystem in a warmer world and its role on global climate feedbacks. This study presents the result of the first in situ warming experiment in two Colombian páramos using Open-Top Chambers. We evaluated the response to warming of several ecosystem carbon balance-related processes, including decomposition, soil respiration, photosynthesis, plant productivity, and vegetation structure after 3 years of warming. We found that OTCs are an efficient warming method in the páramo, increasing mean air temperature by 1.7°C and mean daytime temperature by 3.4°C. The maximum air temperature differences between OTC and control was 23.1°C. Soil temperature increased only by 0.1°C. After 3 years of warming using 20 OTC (10 per páramo) in a randomized block design, we found no evidence that warming increased CO2 emissions from soil respiration, nor did it increase decomposition rate, photosynthesis or productivity in the two páramos studied. However, total C and N in the soil and vegetation structure are slowly changing as result of warming and changes are site dependent. In Sumapaz, shrubs, and graminoids cover increased in response to warming while in Matarredonda we observed an increase in lichen cover. Whether this change in vegetation might influence the carbon sequestration potential of the páramo needs to be further evaluated. Our results suggest that páramos ecosystems can resist an increase in temperature with no significant alteration of ecosystem carbon balance related processes in the short term. However, the long-term effect of warming could depend on the vegetation changes and how these changes alter the microbial soil composition and soil processes. The differential response among páramos suggest that the response to warming could be highly dependent on the initial conditions and therefore we urgently need more warming experiments in páramos to understand how specific site characteristics will affect their response to warming and their role in global climate feedbacks. © Copyright © 2021 Lasso, Matheus-Arbeláez, Gallery, Garzón-López, Cruz, Leon-Garcia, Aragón, Ayarza-Páez and Curiel Yuste.Special thanks to David Campos, Fabian Salgado, Luis Fernando Rojas, Ewen Dano, Jorge Acosta, Juliana Portilla, and Michelle Guevara that helped with field and lab work. We would like to thank the Sabogal family for allowing the establishment of the OTC and collection of samples in the p?ramo ?Parque Ecol?gico Matarredonda? and to the Lieutenant Colonel Edgar Riveira, Commander of the High Mountain Battalion No. 1 in Sumapaz and all the commanders that follow him and who provided us with accommodation and food in the battalion as well as logistic support in all our field campaigns. Thanks to all the soldiers who always enthusiastically helped us in the field work in Sumapaz. This research was also supported by the Basque Government through the BERC 2018?2021 program, and by the Spanish Ministry of Science, Innovation and Universities through the BC3 Mar?a de Maeztu excellence accreditation (MDM-2017-0714). Funding. Funding for this research comes from the ?Patrimonio Aut?nomo Fondo Nacional de Financiamiento para la Ciencia, la Tecnolog?a y la Innovaci?n Francisco Jos? de Caldas?Colciencias,? grant number 120471451294, granted by Colciencias (today?s Colombian Ministry of Science, Technology and Innovation), from Eloisa Lasso?s FAPA (Fondo de Apoyo para Profesores Asistentes) grant number P12.160422.001 from the Universidad de los Andes, and from the Research Fund to support faculty programs at the Faculty of Sciences at the Universidad de los Andes grant number INV-2019-84-1805

On morphological hierarchical representations for image processing and spatial data clustering

Hierarchical data representations in the context of classi cation and data clustering were put forward during the fties. Recently, hierarchical image representations have gained renewed interest for segmentation purposes. In this paper, we briefly survey fundamental results on hierarchical clustering and then detail recent paradigms developed for the hierarchical representation of images in the framework of mathematical morphology: constrained connectivity and ultrametric watersheds. Constrained connectivity can be viewed as a way to constrain an initial hierarchy in such a way that a set of desired constraints are satis ed. The framework of ultrametric watersheds provides a generic scheme for computing any hierarchical connected clustering, in particular when such a hierarchy is constrained. The suitability of this framework for solving practical problems is illustrated with applications in remote sensing

Crescimento e respostas fisiológicas ao estresse de transporte em juvenis de tilápiado-nilo criados em natação sustentada.

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Simulation of risk of tuberculosis infection in healthcare workers in hospitals of an intermediate incidence country

We simulated the frequency of tuberculosis infection in healthcare workers in order to classify the risk of TB transmission for nine hospitals in Medellín, Colombia. We used a risk assessment approach to estimate the average number of infections in three risk groups of a cohort of 1082 workers exposed to potentially infectious patients over 10- and 20-day periods. The risk level of the hospitals was classified according to TB prevalence: two of the hospitals were ranked as being of very high priority, six as high priority and one as low priority. Consistent results were obtained when the simulation was validated in two hospitals by studying 408 healthcare workers using interferon gamma release assays and tuberculin skin testing. The latent infection prevalence using laboratory tests was 41% [95% confidence interval (CI) 34·3–47·7] and 44% (95% CI 36·4–51·0) in those hospitals, and in the simulation, it was 40·7% (95% CI 32·3–49·0) and 36% (95% CI 27·9–44·0), respectively. Simulation of risk may be useful as a tool to classify local and regional hospitals according to their risk of nosocomial TB transmission, and to facilitate the design of hospital infection control plans