11 research outputs found

    Evaluación de la concentración de carbono y retención del agua del suelo en zonas intervenidas y no intervenidas en suelos andinos en el páramo del volcán Ruco Pichincha Sector Cruz Loma, Cantón Quito en el período 2022-2023

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    La investigación tiene como objetivo determinar la Evaluación de la Concentración de Carbono e identificar las actividades antrópicas que se desarrollan en el suelo del Páramo del Volcán Rucu Pichincha, Sector Cruz Loma, Cantón Quito con la medición de las concentraciones de carbono del suelo del páramo y conocer si las actividades antrópicas que se realizan en el lugar afecta a la calidad del suelo. El trabajo fue realizado de carácter experimental y descriptivo, utilizando el método del cilindro en donde se tomaron 15 muestras con la ayuda de barreno y pala, las muestras fueron homogenizadas dejando un total de 9 submuestras representativas del área de estudio, las muestras fueron desarrolladas para el análisis físicos-químicos de tres tratamientos a distintas altitudes, en diferentes tipos de suelos siendo estos: intervenidos y suelos no intervenidos, los cuales fueron identificados según las actividades antrópicas realizadas en el sector por la influencia de turistas locales y extranjeros. Los análisis de los resultados físico-químicos lograron demostrar que el pH en los suelos de los páramos del Rucu Pichincha mantienen un potencial de hidrogeno que se aproxima más a la neutralidad es decir su pH varía de entre 6,05 a 7,71. Por otra parte se logró evidenciar que se cuenta con densidad aparente que varía entre 0,69% a 1,30% es así que por su parte el porcentaje de porosidad que encontramos en estos suelos lograron evidenciar que varía entre 51,32 a 73,78% que a su vez cuentan con un porcentaje de humedad que varía de 9,26 a 59,46%. El porcentaje de MOS en estos tipos de páramos varía desde 3,22 a 7,97%. La cantidad de COS en miligramos por hectárea varía 73,01 a 143,18. Para finalizar se midió la conductividad de los suelos del páramo del Rucu Pichincha los cuales varían desde 115,84 a 562,34 microsiemens por centímetro (µS/cm). El análisis obtenido demuestra que los niveles de carbono orgánico del suelo intervenido y del suelo no intervenido son iguales, los valores de estudio no muestran gran variación, aunque en el análisis físico de la textura si se puede observar un cambio significativo entre estos dos tipos de suelo.The following research aims to determine the Carbon Concentration Assessment and identify the anthropic activities that take place in the soil of the Rucu Pichincha Volcano Paramo, Cruz Loma Sector, Quito Canton, in order to evaluate the carbon concentrations of the soil of the páramo and to know if the anthropic activities carried out in the sector affect the quality of the soil. The work was carried out of an experimental and descriptive nature, where physical-chemical analyses of three treatments were developed at different altitudes (First, Second and Third), in different types of intervened and non-intervened soils, recognizing the anthropic activities carried out in the sector by the influence of local and foreign tourists, the samples were collected on the surface of the soil with the help of a shovel and with the help of a hole at 30cm depth forming compound sub samples. The analysis of the physical-chemical results showed that the pH in the soils of the Rucu Pichincha moorlands maintains a hydrogen potential that is closer to neutrality, that is to say, its pH varies between 6.05 and 7.71. On the other hand, it was found that the bulk density varies between 0.69% to 1.30% and the percentage of porosity found in these soils varied between 51.32% to 73.78% and also that they have a percentage of humidity that varies between 9.26% to 59.46%. The percentage of SOM in these types of moors varies from 3.22 to 7.97%. The amount of COS in milligrams per hectare varies from 73.01 to 143.18. Finally, the conductivity of the soils of the Rucu Pichincha páramo was measured and ranged from 115.84 to 562.34 microsiemens per centimeter (µS/cm). Thanks to these results, it was possible to demonstrate that all the activities carried out in the Rucu Pichincha Paramo, i.e., anthropic activities, have a significant influence in determining the COS of this paramo

    Evolving trends in the management of acute appendicitis during COVID-19 waves. The ACIE appy II study

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    Background: In 2020, ACIE Appy study showed that COVID-19 pandemic heavily affected the management of patients with acute appendicitis (AA) worldwide, with an increased rate of non-operative management (NOM) strategies and a trend toward open surgery due to concern of virus transmission by laparoscopy and controversial recommendations on this issue. The aim of this study was to survey again the same group of surgeons to assess if any difference in management attitudes of AA had occurred in the later stages of the outbreak. Methods: From August 15 to September 30, 2021, an online questionnaire was sent to all 709 participants of the ACIE Appy study. The questionnaire included questions on personal protective equipment (PPE), local policies and screening for SARS-CoV-2 infection, NOM, surgical approach and disease presentations in 2021. The results were compared with the results from the previous study. Results: A total of 476 answers were collected (response rate 67.1%). Screening policies were significatively improved with most patients screened regardless of symptoms (89.5% vs. 37.4%) with PCR and antigenic test as the preferred test (74.1% vs. 26.3%). More patients tested positive before surgery and commercial systems were the preferred ones to filter smoke plumes during laparoscopy. Laparoscopic appendicectomy was the first option in the treatment of AA, with a declined use of NOM. Conclusion: Management of AA has improved in the last waves of pandemic. Increased evidence regarding SARS-COV-2 infection along with a timely healthcare systems response has been translated into tailored attitudes and a better care for patients with AA worldwide

    Memorias del primer Simposio Nacional de Ciencias Agronómicas

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    Primer simposio nacional de Ciencias Agronómicas: El renacer del espacio de discusión científica para el Agro colombiano

    Memorias del primer Simposio Nacional de Ciencias Agronómicas

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    Primer simposio nacional de Ciencias Agronómicas: El renacer del espacio de discusión científica para el Agro colombiano

    1er workshop nacional: de investigación en la formación inicial de profesores de ciencias “reflexiones de la investigación formativa en ciencias mediada por contextos tecnológicos”

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    La vereda el Pensil del municipio de la Argentina, Huila, Colombia se caracteriza por sus cultivos de café, sin embargo, en estos habitan organismos como las serpientes y los murciélagos de los cuales se desconoce el valor biológico que tienen estos individuos y como consecuencia de esto atentan contra ellos destruyendo el equilibrio ecológico del ecosistema. Teniendo en cuenta lo anterior se planteó como objetivo de investigación generar conciencia ambiental a través de una experiencia significativa sobre la importancia biológica de los quirópteros y serpientes El proyecto de investigación se desarrolló a partir de guías por parte los estudiantes los cuales indagaron concepciones en torno a las serpientes y murciélagos, donde se conoció la visión de la comunidad acerca del papel ecológico que cumplen. Se evidenció el desconocimiento por parte de la comunidad pues se observa que el mayor porcentaje de personas no conocen la función de controladores de plagas de ambos organismos o las funciones polinizadoras y dispersoras de semillas de los murciélagos. En conclusión, la falta de educación ambiental puede llevar a que la comunidad genere desequilibrio biológico y atente contra especies que les genera cierto temor y que están rodeadas de mitos productos del conocimiento popular

    I simposio Internacional sobre Investigación en la enseñanza de las ciencias

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    Edición 202

    Revista Temas Agrarios Volumen 26; Suplemento 1 de 2021

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    1st International and 2nd National Symposium of Agronomic Sciences: The rebirth of the scientific discussion space for the Colombian Agro.1 Simposio Intenacional y 2 Nacional de Ciencias Agronómicas: El renacer del espacio de discusión científica para el Agro colombiano

    Evolving trends in the management of acute appendicitis during COVID-19 waves. The ACIE appy II study (vol 46, pg 2021, 2022)

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    Global attitudes in the management of acute appendicitis during COVID-19 pandemic: ACIE Appy Study

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    Background: Surgical strategies are being adapted to face the COVID-19 pandemic. Recommendations on the management of acute appendicitis have been based on expert opinion, but very little evidence is available. This study addressed that dearth with a snapshot of worldwide approaches to appendicitis. Methods: The Association of Italian Surgeons in Europe designed an online survey to assess the current attitude of surgeons globally regarding the management of patients with acute appendicitis during the pandemic. Questions were divided into baseline information, hospital organization and screening, personal protective equipment, management and surgical approach, and patient presentation before versus during the pandemic. Results: Of 744 answers, 709 (from 66 countries) were complete and were included in the analysis. Most hospitals were treating both patients with and those without COVID. There was variation in screening indications and modality used, with chest X-ray plus molecular testing (PCR) being the commonest (19\ub78 per cent). Conservative management of complicated and uncomplicated appendicitis was used by 6\ub76 and 2\ub74 per cent respectively before, but 23\ub77 and 5\ub73 per cent, during the pandemic (both P < 0\ub7001). One-third changed their approach from laparoscopic to open surgery owing to the popular (but evidence-lacking) advice from expert groups during the initial phase of the pandemic. No agreement on how to filter surgical smoke plume during laparoscopy was identified. There was an overall reduction in the number of patients admitted with appendicitis and one-third felt that patients who did present had more severe appendicitis than they usually observe. Conclusion: Conservative management of mild appendicitis has been possible during the pandemic. The fact that some surgeons switched to open appendicectomy may reflect the poor guidelines that emanated in the early phase of SARS-CoV-2

    Elective Cancer Surgery in COVID-19–Free Surgical Pathways During the SARS-CoV-2 Pandemic: An International, Multicenter, Comparative Cohort Study

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