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au:RODRIGUEZ, M.

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Gasificación con aire de hojas y tallo de palma de aceite y determinación de su potencial para la generación de energía eléctrica
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Orozco, Laura M.

; Mejía, José A.

; Cardona, Sandra M.

; Pérez-Rodriguez, Claudia P.

Información tecnológica

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jun 2023, Volume 34 N. 3 Pages 57 - 68

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract: The primary objective of this research study is to characterize the gasification of oil-palm frond and trunk obtained as residual biomass from oil-palm crops by using air as a gasifying agent. Screening type experimentation is applied by using a downflow free-fall reactor. At 800°C and 0.24 equivalence relation (ER), the results for oil-palm frond show a yield of 1.85 Nm3 gas/kg dry biomass and a heating value of 4.08 MJ/Nm3. For oil-palm trunk, the yield is 1.30 Nm3 gas/kg dry biomass and the heating value is 4.56 MJ/Nm3. The gas obtained has the potential to generate 1.05 kW-h/kg dry biomass for oil-palm frond and 0.90 kW-h/kg of dry biomass for oil-palm trunk. In conclusion, energetic utilization of residual biomass (fronds and trunks) should be explored in Colombia to optimize oil-palm economic and environmental production processes in a circular economy scheme.

Resumen: El principal objetivo de esta investigación es caracterizar la gasificación de hojas y tallos obtenidos como biomasa residual en el cultivo de palma de aceite utilizando aire como agente gasificante. Se desarrolla una experimentación tipo barrido y se utiliza un reactor de caída libre de flujo descendente. A 800°C y relación de equivalencia (ER) de 0.24, los resultados muestran para las hojas un rendimiento de 1.85 Nm3 gas/kg biomasa seca y un poder calorífico inferior de 4.08 MJ/Nm3. Para el tallo se obtiene 1.30 Nm3 gas/kg biomasa seca y poder calorífico inferior de 4.56 MJ/Nm3 . El gas obtenido tiene un potencial de generación de energía eléctrica de 1.05 kW-h/kg de biomasa seca para hojas y 0.90 kW-h/kg de biomasa seca para tallo. En conclusión, el aprovechamiento energético de las biomasas residuales (hojas y tallo) debería ser explorado en Colombia para optimizar económica y ambientalmente los procesos de producción de aceite de palma en un esquema de economía circular.

Caracterización agroclimática del cultivo de Agave tequilana Weber en la barranca del Río Santiago
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Tena-Meza, Martín Pedro

; Navarro-Cerrillo, Rafael M.

; Villavicencio-García, Raymundo

; Contreras-Rodriguez, Sergio Honorio

Revista mexicana de ciencias agrícolas

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may 2023, Volume 14 N. 3 Pages 375 - 387

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen En sus inicios la producción de tequila utilizó diferentes especies de agaves, con el tiempo el Agave tequilana Weber se consolidó como especie única por presentar mejores características para su cultivo y producción de azúcares. La Barranca del Río Santiago es considerada como el lugar de origen de la planta de Agave tequilana y del proceso de elaboración de la bebida que hoy se conoce con el nombre tequila. A partir de lo declarado por la Organización de las Naciones Unidas para la Educación la Ciencia y la Cultura, el paisaje agavero y las antiguas instalaciones industriales de tequila como patrimonio cultural de la humanidad. La caracterización espacial y temporal de la información climatológica y edáfica disponible para una región en particular permite comprender el tipo de manejo que los agricultores practican sobre sus cultivos, evaluar sus restricciones y posibles efectos en la producción y en el medio ambiente. El objetivo de este trabajo fue conocer las condiciones ambientales bajo las cuales se distribuyen las plantaciones actuales y potenciales del cultivo de A. tequilana en el Cañón del Río Santiago y de manera específica la parte que incluye el paisaje agavero. Se detectó que en la barranca más de 50% de las plantaciones de agave se localizaron en terrenos escarpados sin prácticas de conservación de suelo lo que provoca su pérdida y contaminación con agroquímicos al ecosistema barranqueño, considerado como un atractivo natural a conservar dentro del paisaje agavero.

Abstract In its beginnings the production of tequila used different species of agaves, over time Agave tequilana Weber consolidated itself as a unique species for presenting better characteristics for its cultivation and production of sugars. The Ravine of the Santiago River is considered the place of origin of the Agave tequilana plant and of the preparation process of the drink that is now known as Tequila. Based on what was declared by the United Nations Educational, Scientific and Cultural Organization, the Agave Landscape and the Ancient Industrial Facilities of Tequila as cultural heritage of humanity. The spatial and temporal characterization of the climatological and edaphic information available for a particular region allows understanding the type of management that farmers practice on their crops, evaluating their restrictions and possible effects on production and the environment. The objective of this work was to know the environmental conditions under which the current and potential plantations of the A. tequilana crop are distributed in the Canyon of the Santiago River and specifically the part that includes the agave landscape. It was detected that in the ravine more than 50% of the agave plantations were in steep terrain without soil conservation practices, which causes its loss and contamination with agrochemicals to the ravine ecosystem, considered as a natural attraction to be conserved within the Agave Landscape.

https://doi.org/10.29312/remexca.v14i3.3085

Abiotic factors and photosynthetically active photon density affect the physiological mechanisms of jaboticaba
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Coêlho, Ester dos S.

; Ribeiro, João E. da S.

; Silva, Elania F. da

; Silva, Toshik I. da

; Oliveira, Pablo H. de A.

; Dias, Thiago J.

; Barros Júnior, Aurélio P.

; Silva, Daniel V.

; Rodriguez, Ronald M.

Revista Brasileira de Engenharia Agrícola e Ambiental

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may 2023, Volume 27 N. 5 Pages 317 - 326

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT In fruit species, the amount of solar energy absorbed can influence fruit quality; hence, ensuring optimal light distribution management in the canopy of plants is essential. Therefore, the objectives of this study were (i) to analyze the variations in gas exchange through the day and (ii) identify the photosynthetically active photon flux density (PPFD) that promotes higher chlorophyll fluorescence and electron transport rate in jaboticaba seedlings. The experimental design was completely randomized, with treatments consisting of 18 photosynthetic photon flux densities and three evaluations throughout the day. Six replicates were used, with two plants per plot. Gas exchange and chlorophyll a fluorescence in P. peruviana were altered due to fluctuating photosynthetic photon flux density (0; 25; 50; 75; 100; 125; 150; 175; 200; 400; 600; 800; 1,000; 1,200; 1,400; 1,600; 1,800; and 2,000 μmol m-2 s-1) and environmental conditions throughout the day (8:00 a.m., 12:00 and 4:00 p.m.). The higher PPFD (1,384.6 μmol m-2 s-1) and air temperature (39.74 °C) at noon (12:00 p.m.) favored gas exchange in this species. An increase in PPFD of up to 1,000 μmol m-2 s-1 positively influenced the gas exchange and chlorophyll a fluorescence of P. peruviana.

RESUMO Em espécies fruteiras, é essencial considerar o gerenciamento da distribuição da luz nas copas das plantas, pois a quantidade de energia solar absorvida pode influenciar na qualidade dos frutos. Diante disso, os objetivos deste estudo foram: (i) analisar as variações das trocas gasosas ao longo do dia; (ii) identificar a densidade de fluxo de fótons fotossinteticamente ativos (PPFD) que promove maior fluorescência da clorofila e maior taxa de transporte de elétrons em mudas de jaboticaba. O delineamento experimental foi inteiramente casualizado, sendo os tratamentos compostos por 18 densidades de fluxo de fótons fotossinteticamente ativos (0; 25; 50; 75; 100; 125; 150; 175; 200; 400; 600; 800; 1.000; 1.200; 1.400; 1.600; 1.800 e 2.000 μmol m-2 s-1) e três horários de avaliação ao longo do dia (08:00, 12:00 e 16:00 h). Foram utilizadas seis repetições, considerando duas plantas por parcela útil. Trocas gasosas e fluorescência da clorofila a de P. peruviana foram alterados em virtude da PPFD e das condições ambientais ao longo do dia. A alta PPFD (1.384,6 μmol m-2 s-1) e temperatura do ar (39,74 °C) no horário de 12 horas favoreceu as trocas gasosas dessa espécie. O aumento da PPFD até 1.000 µmol m-2 s-1 influenciou positivamente as trocas gasosas e fluorescência da clorofila a de P. peruviana.

https://doi.org/10.1590/1807-1929/agriambi.v27n5p317-326

Application of Signal Classifiers in Auditory Evoked Potentials for the Detection of Pathological Patients
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BALDIVIEZO, M. G.

; BARBERÍA, J. L.

; BONTEMPO, C. B.

; CORSARO, Y.

; FERNANDEZ BIANCARDI, F.

; HERNANDO, M. R.

; LICATA CARUSO, L.

; PAGLIA, A.

; RODRIGUEZ, M. R.

; LEGNANI, W. E.

Trends in Computational and Applied Mathematics

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mar 2023, Volume 24 N. 1 Pages 63 - 81

Abstract: En | Text: En | PDF: En

ABSTRACT The auditory brainstem response (ABR) by evoked potentials is a widespread auditory pathway assessment technique. This is largely applied due to its cost-effectiveness, practicality and ease of use. In contrast, it requires a trained professional to carry out the analysis of the results. This motivates several research efforts to increase the independence of the diagnostician. To this end, the present work shows the ability of three signal classification tools to differentiate ABR studies of normal hearing subjects from those who may have some pathology. As a starting point, the PhysioNet short term auditory evoked potentials databases are used to calculate the features later applied to construct the dataset. The features used are diverse classes of permutation entropy, fractal dimension, the Lyapunov exponent and the zero crossing rate. To ensure more accurate results, a Montecarlo simulation of one thousand trials is employed to train the classifiers and test the results. The goodness of the classification is performed upon the basis of the computation of quality parameters, such as the area under the receiver operating characteristic curve (ROC), the F1 score coefficient and the accuracy. In all the cases the methodology proposed gives high performance results that encourage the line of research of the present work.

https://doi.org/10.5540/tcam.2022.024.01.00063

Mansoa alliacea extract improves the growth performance and innate immune response of Arapaima gigas challenged with Aeromonas hydrophila and handling stress
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DIAS, Marcia Kelly Reis

; YOSHIOKA, Eliane Tie Oba

; RODRIGUEZ, Anselmo Fortunato Ruiz

; RIBEIRO, Ricardo Amaral

; FERNANDES, Caio Pinho

; OZÓRIO, Rodrigo Otávio Almeida

; TAVARES-DIAS, Marcos

Acta Amazonica

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mar 2023, Volume 53 N. 1 Pages 24 - 31

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT This study investigated the effects of dietary supplementation with Mansoa alliacea hydroalcoholic extracts on growth, blood and immune parameters of Arapaima gigas. Fish were fed for 30 days with diets enriched with 0, 4, 8, and 12 g kg-1 of M. alliacea hydroalcoholic extract and subjected to infection with Aeromonas hydrophila and handling stress. Fish fed with 8 g kg-1 of extract showed significant increase in final weight, specific growth rate and feed efficiency when compared to the other groups. Glucose, triglycerides, total proteins, and globulins increased significantly in fish fed with 8 g kg-1 of extract, whereas albumin decreased. The number of thrombocytes increased significantly with the dietary supplementation of 8 and 12 g kg-1 of extract. After the challenge with A. hydrophila and handling stress, fish fed with 8 g kg-1 of extract had significantly higher levels of glucose, globulins, and albumins, and fish fed with 8 and 12 g kg-1 of extract showed an increment of respiratory burst. Triglyceride levels dropped significantly in fish fed with 4, 8, and 12 g kg-1 of extract, whereas the number of neutrophils increased, and total thrombocytes, leukocytes and lymphocytes were higher in fish fed with 12 g kg-1 of extract. Dietary supplementation with M. alliacea extract at 8 g kg-1 was efficient in improving the growth and innate immunity of A. gigas, being potentially useful in fish farming to control the development of A. hydrophila infections.

RESUMO Investigou-se os efeitos da suplementação com extrato hidroalcólico de Mansoa alliacea sobre o crescimento e parâmetros sanguíneos e imunológicos de Arapaima gigas. Os peixes foram alimentados por 30 dias com dietas enriquecidas com 0, 4, 8 e 12 g kg-1 de extrato hidroalcoólico de M. alliacea e submetidos à infecção por Aeromonas hydrophila e estresse de manejo. Os peixes alimentados com 8 g kg-1 de extrato apresentaram aumento significativo no peso final, taxa de crescimento específico e eficiência alimentar quando comparados aos demais grupos. Glicose, triglicerídeos, proteínas totais e globulinas aumentaram significativamente nos peixes alimentados com 8 g kg-1 de extrato, enquanto a albumina diminuiu. O número de trombócitos aumentou significativamente com a suplementação dietética de 8 e 12 g kg-1 de extrato. Após infecção com A. hydrophila e estresse de manejo, os peixes alimentados com 8 g kg-1 de extrato apresentaram níveis significativamente mais altos de glicose, globulinas e albuminas, e os peixes alimentados com 8 e 12 g kg-1 de extrato apresentaram incremento de explosão respiratória. Os níveis de triglicerídeos decresceram nos peixes alimentados com 4, 8 e 12 g kg-1 de extrato, enquanto o número de neutrófilos aumentou, e o número total de trombócitos, leucócitos e linfócitos foi maior nos peixes alimentados com 12 g kg-1 de extrato. A suplementação com a 8 g kg-1 de extrato de M. alliacea foi eficiente em melhorar o crescimento e a imunidade inata de A. gigas, sendo potencialmente útil na piscicultura para controlar o desenvolvimento de infecções por A. hydrophila.

https://doi.org/10.1590/1809-4392202101231

Solution of advection-diffusion-reaction problems on a sphere: High-resolution numerical experiments
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Skiba, Yuri N.

; Cruz-Rodriguez, Roberto C.

; Filatov, Denis M.

Atmósfera

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2023, Volume 37 elocation 53172

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

RESUMEN El método numérico implícito e incondicionalmente estable propuesto por Skiba (2015) se aplica para resolver problemas lineales de advección-difusión-reacción y no lineales de difusión-reacción sobre una esfera. Los experimentos numéricos realizados sobre una malla esférica de alta resolución muestran la eficacia del método para modelar procesos de advección-difusión lineales sobre una esfera (dispersión de la contaminación en la atmósfera), y procesos de difusión no lineal (propagación de ondas de temperatura no lineales, regímenes blow-up de combustión y reacciones químicas en el modelo de Gray-Scott). El método describe correctamente el balance de masa de una sustancia en sistemas forzados y disipativos, y conserva la masa total y la norma de la solución en ausencia de forzamiento y disipación.

ABSTRACT The implicit and unconditionally stable numerical method proposed in Skiba (2015) is applied to solve linear advection-diffusion-reaction problems and nonlinear diffusion-reaction problems on a sphere. Numerical experiments carried out on a high-resolution spherical mesh show the effectiveness of the method in modelling linear advection-diffusion processes on a sphere (dispersion of pollution in the atmosphere), and nonlinear diffusion processes (propagation of nonlinear temperature waves, blow-up regimes of combustion, and chemical reactions in the Gray-Scott model). The method correctly describes the mass balance of a substance in forced and dissipative systems and conserves the total mass and norm of the solution in the absence of forcing and dissipation.

https://doi.org/10.20937/atm.53172

Can domestic dogs be considered a good reservoir of Leishmania (L.) infantum chagasi in an endemic area of nonulcerated cutaneous leishmaniasis in Southern Honduras?
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Segura, Gabriela Beatriz Rodriguez

; Ochoa, Wilfredo Humberto Sosa

; Matta, Vânia Lúcia Ribeiro da

; Martínez, Mercedes

; Tercero, Carol Rodriguez

; Gonzalez, Raquel Romero

; Pacheco, Carmen M. Sandoval

; Flores, Gabriela V. Araujo

; Silveira, Fernando Tobias

; Henriquez, Maria Mercedes Rueda

; Laurenti, Márcia Dalastra

Revista do Instituto de Medicina Tropical de São Paulo

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2023, Volume 65 elocation e24

Abstract: En | Text: En | PDF: En

ABSTRACT Dogs are considered to be the main domestic reservoir associated with the transmission of Leishmania (L.) infantum chagasi to humans in endemic areas of visceral leishmaniasis in America. However, little is known about the role of canines as a source of infection in endemic areas of nonulcerated cutaneous leishmaniasis (NUCL). Therefore, the objective of the present study was to investigate the role of dogs as a possible reservoir of the parasite in Southern Honduras. Dogs (n = 107) living with individuals affected by NUCL were clinically examined and biological material was collected for parasitological and immunological diagnosis. Most animals showed a healthy appearance and a few presented slight weight loss (64%), alopecia (7%), onychogryphosis (5%) and skin lesions (1%). The overall seroprevalence of Leishmania infection based on the DDP ® quick test and/or in-house ELISA serological test was 41%. The presence of the parasite’s DNA was confirmed in 94% of the dogs; however, the average parasite load in the buffy coat was low at 6.09 parasites/µL, ranging between 0.221 and 50.2. The skin of seropositive dogs examined by histopathology using paraffin sections stained by hematoxylin and immunohistochemistry did not show cutaneous lesions or parasite amastigotes. Based on the absence of parasites in the skin and the low parasite load detected in the buffy coat, it seems that the dog does not represent a good source of infection for the vector in the endemic area of NUCL transmission in Southern Honduras. Other domestic and/or wild animals should be investigated.

https://doi.org/10.1590/s1678-9946202365024

Experiencias del telemonitoreo en pacientes con COVID-19
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Almeyda-Contreras, Nicolle Alejandra

; Feijóo-Oscorima, Melissa Johana

; Rodriguez-Vassallo, Mateo Iván

; Tafur-Granara, Lucero

; Vela-Ruiz, José M.

; Alatrista Gutiérrez Vda. de Bambarén, María del Socorro

Revista Cubana de Información en Ciencias de la Salud

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2023, Volume 34 elocation e2264

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

RESUMEN La COVID-19 genera síntomas respiratorios que pueden causar cuadros de mayor severidad en pacientes con factores de riesgo, por lo que es necesario realizar una detección y atención temprana. En un contexto de aislamiento social y gran demanda de los servicios de salud uno de los métodos de seguimiento desarrollado últimamente es la telemonitorización que permite la vigilancia remota de los pacientes. El objetivo de la investigación fue realizar una revisión panorámica sobre las diferentes experiencias en cuanto a telemonitoreo de pacientes con COVID-19 a nivel nacional e internacional. Se revisaron artículos en inglés y español publicados desde el 1 de enero de 2020 hasta el 7 de mayo de 2022 en los sitios de búsqueda PubMed, SciELO y Google Scholar. La indagación se ejecutó con las palabras clave “telemonitoreo”, “pacientes”, “COVID-19” y “pandemia”. De los 160 artículos encontrados, se descartaron cuatro que estaban duplicados y 126 por no tener relación directa con el tema. De los 30 seleccionados, 24 contaban con resultados de investigación y seis se emplearon para los aspectos teórico-conceptuales relacionados con el objetivo del estudio. La implementación del monitoreo remoto para el seguimiento de pacientes con diagnóstico confirmado o sospechoso de COVID-19 ha demostrado ser factible, de bajo costo, estar al alcance del paciente y del personal médico. Asimismo, la monitorización remota reduce el uso de los recursos hospitalarios e identifica oportunamente el progreso de la enfermedad. Actualmente, aún faltan estudios prospectivos-analíticos que permitan determinar con precisión lo que se podría mejorar en los sistemas de atención remota.

ABSTRACT COVID-19 generates respiratory symptoms that can cause more severe symptoms in patients with risk factors, so early detection and care is necessary. In a context of social isolation and high demand for health services, one of the recently developed monitoring methods is telemonitoring, which allows remote surveillance of patients. The objective of the research was to perform a panoramic review of the different experiences regarding telemonitoring of patients with COVID-19 at national and international level. Articles in English and Spanish published from January 1, 2020 to May 7, 2022 in the PubMed, SciELO and Google Scholar search sites were reviewed. The search was performed with the keywords "telemonitoring", "patients", "COVID-19" and "pandemic". Of the 160 articles found, four were discarded because they were duplicates and 126 because they were not directly related to the topic. Of the 30 selected, 24 had research results and six were used for theoretical-conceptual aspects related to the objective of the study. The implementation of remote monitoring for the follow-up of patients with a confirmed or suspected diagnosis of COVID-19 has proven to be feasible, low cost, within the reach of the patient and medical personnel. Also, remote monitoring reduces the use of hospital resources and identifies disease progression in a timely manner. At present, prospective-analytical studies are still lacking to determine precisely what could be improved in remote care systems.

Atmospheric Corrosion in the Tropics: the Costa Rican Central Valley Case
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Rodriguez-Yáñez, J.

; Brenes-Brenes, R.

; Jiménez-Salas, R.

; Abdalah-Hernandez, M.

; Sanabria-Chinchilla, J.

Portugaliae Electrochimica Acta

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dec 2022, Volume 40 N. 6 Pages 409 - 424

Abstract: En | Text: En | PDF: En

Abstract The Western Central Valley (WCV) of Costa Rica is an area of interest, due to its high concentration of population and economic activity, presenting itself as a tropical monsoontype atmospheric basin (AB), with well-defined climatic seasons (dry and rainy). The present study proposes the assessment of low carbon steel (CS) atmospheric corrosion, based on ISO 9223 (2012) and associated standards. A general analysis of the atmospheric basin effect was initially performed on these data, followed by the basic modeling of air pollutants and meteorological parameters. The WCV is an area of low contamination, which corresponds to a C2 or C3 category, according to ISO 9223. It mainly shows significant climatic seasons (dry and rainy) effects on the initial corrosion rates, but obtaining similar annual corrosion results for them. The ISO 9223 annual atmospheric corrosion model overestimated the actual obtained corrosion values, whereas linear or logarithmic models gave better results, especially when time and/or time of wetness (TOW) were considered as variables.

https://doi.org/10.4152/pea.2022400602

10.

Programa de optimización del uso de antimicrobianos durante la pandemia de COVID-19
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Jorge, Laura

; Lauricella, María Cecilia

; Klajn, Diana

; Molina, Ana María

; del Valle, Sofía

; Rodriguez, Viviana M.

Medicina (Buenos Aires)

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oct 2022, Volume 82 N. 5 Pages 641 - 646

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen A pesar de la baja frecuencia de coinfecciones bacterianas asociadas al COVID-19, la tasa de uso de antibióticos (ATB) empíricos varía entre 70 y 90%. El objetivo primario del estudio fue evaluar el impacto de la implementación de un programa de optimización de antimicrobianos en pacientes con COVID-19 (PROA-COVID). Se realizó un estudio prospectivo de serie de tiempo interrumpida. Se evaluó la prevalencia, adecuación y consumo de ATB en adultos internados con COVID previo a la implementación del PROA-COVID (P1, junio 2020) y en tres períodos posteriores (P2 en agosto 2020, P3 en octubre 2020 y P4 en junio 2021). Se incluyeron 301 pacientes. Las formas clínicas moderadas-graves fueron más frecuentes en los P2, 3 y 4 (p < 0.001). La implementación del programa mostró una disminución significativa del uso de ATB (61% vs. 41% vs. 31.1% vs. 8.1%, p < 0.001), de la indicación de tratamiento combinado con macrólidos (17.3% vs. 19.2% vs. 10.8% vs. 1.4%, p = 0.03) y aumento del uso adecuado (37.5% vs. 46.9% vs. 69.9% vs. 66.6%, p = 0.039). El consumo de ATB en DDT (días de tratamiento) totales/1000 días paciente fue: 347.9 vs. 272.8 vs. 134.3 vs. 43.6 (p < 0.001). No hubo diferencias significativas en el pase a unidades de cuidados críticos ni en la mortalidad. La implementación del PROA-COVID fue una estrategia efectiva para reducir el uso de antibióticos y optimizar sus indicaciones sin impacto en la morbimortalidad.

Abstract In spite of the low frequency of COVID-19 associated bacterial coinfections, the rate of empiric an tibiotic use varies between 70% and 90%. The primary objective of this study was to evaluate the impact of an antimicrobial stewardship program (ASP) on COVID-19 patients. The study design was an interrupted time series, assessing prevalence of antibiotic use, adequacy of treatment and antimicrobial consumption in adult patients hospitalized with COVID before the COVID-ASP implementation in June 2020, and on three subsequent periods (P2 in August 2020, P3 in October 2020 and P4 in June 2021). One hundred and one patients were included. Moderate and severe disease was more frequent in P2, P3, and P4 periods (p < 0.001). After the implementation we observed a significant reduction on ATM use (61% vs. 41% vs. 31.1% vs. 8.1%, p < 0.001), and macrolid combination therapy (17.3% vs. 19.2% vs. 10.8% vs. 1.4%, p = 0.03), and an increase of adequate use (37.5% vs. 46.9% vs. 69.9% vs. 66.6%, p = 0.039). Antimicrobial consumption by period in days of therapy (DOT)/1000 patient-day was 347.9 vs. 272.8 vs. 134.29 vs. 43.6 (p<0.001). We did not find any difference in intensive care unit transfer or mortality. COVID-ASP implementation was an effective strategy to reduce antimicrobial consump tion and optimize antibiotic indications without affecting morbidity or mortality.

11.

Prevalencia de compromiso renal en pacientes pediátricos internados con enfermedad por coronavirus 2019: estudio multicéntrico
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Colazo, Anabella

; Bresso, Paula

; Rodriguez, Luis

; Geuna, Jesica

; Casim, Patricia

; Arrúa, Larisa

; Rivichini, Marta

; Adragna, Silvina

; Balestracci, Alejandro

; Cisnero, Débora

; Rígali, Silvina

; Blazquez, María P.

; Machado, Fabio

; Ripeau, Diego

; Alconcher, Laura

; Exeni, Andrea

; García Chervo, Laura

; Coccia, Paula

; Ramírez, Flavia

; Ferraris, Jorge

; Meni Battaglia, Luciana

; Martin, Sandra M.

Archivos argentinos de pediatría

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oct 2022, Volume 120 N. 5 Pages 1 - 10

Abstract: Es | Text: Es | PDF: Es

https://doi.org/10.5546/aap.2022.310

12.

The rs4783961 and rs708272 genetic variants of the CETP gene are associated with coronary artery disease, but not with restenosis after coronary stenting
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Vargas-Alarcón, Gilberto

; Pérez-Méndez, Oscar

; Posadas-Sánchez, Rosalinda

; Peña-Duque, Marco A.

; Martínez-Ríos, Marco A.

; Delgadillo-Rodriguez, Hilda

; Fragoso, José M.

Archivos de cardiología de México

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sep 2022, Volume 92 N. 3 Pages 334 - 341

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract Objective: We evaluated whether cholesteryl ester transfer protein (CETP) gene polymorphisms are associated with the presence of coronary artery disease (CAD) and/or restenosis in patients with coronary stent. Methods: Two polymorphisms of the CETP gene [−971 A/G (rs4783961), and Taq1B A/G (rs708272)] were genotyped by 5'exonuclease TaqMan assays in 219 patients with CAD (66 patients with restenosis and 153 without restenosis) and 607 control individuals. Results: The distribution of polymorphisms was similar in patients with and without restenosis. However, when the whole group of patients (with and without restenosis) was compared to healthy controls, under dominant model, the G allele of the Taq1B A/G polymorphism was associated with increased risk of CAD (odds ratio [OR] = 1.48, pCDom = 0.032). In the same way, under codominant, dominant, and additive models, the A allele of the −971 A/G polymorphisms was associated with an increased risk of developing CAD (OR = 2.03, pCCo-dom = 0.022, OR = 1.83, pCDom = 0.008, and OR = 1.39, pCAdd = 0.011, respectively). In addition, the linkage disequilibrium showed that the “AG” haplotype was associated with increased risk of developing CAD (OR = 1.28, p = 0.03). Conclusion: This study demonstrates that CETP Taq1B A/G and CETP −971 A/G polymorphisms are associated with an increased risk of developing CAD, but no association with restenosis was observed.

Resumen Objetivo: Evaluamos si los polimorfismos del gen CETP están asociados con la presencia de enfermedad arterial coronaria (EAC) y/o restenosis en pacientes con stent coronario. Métodos: En este estudio se genotiparon dos polimorfismos del gen CETP [−971 A/G (rs4783961) y Taq1B A/G (rs708272)] mediante ensayos de 5'exonucleasa TaqMan en 219 pacientes con EAC (66 pacientes con restenosis y 153 sin restenosis), y 607 individuos de control. Resultados: La distribución de polimorfismos fue similar en pacientes con y sin restenosis. Sin embargo, cuando se comparó todo el grupo de pacientes (con y sin restenosis) con controles sanos, bajo el modelo dominante el alelo G del polimorfismo Taq1B A/G se asocia con un mayor riesgo de EAC (OR = 1.48, pCDom = 0.032). De la misma manera, bajo los modelos co-dominante, dominante y aditivo, el alelo A de los polimorfismos −971 A/G se asocia con un mayor riesgo de desarrollar EAC (OR = 2.03, pCCo-dom = 0.022, OR = 1.83, pCDom = 0,008 y OR = 1.39, pCAdd = 0.011, respectivamente). Adicionalmente, el desequilibrio de ligamiento mostró que el haplotipo “AG” se asocia con un mayor riesgo de desarrollar EAC (OR = 1.28, p = 0.03). Conclusión: En resumen, este estudio demuestra que los polimorfismos CETP Taq1B A/G y CETP −971 A/G están asociados con un mayor riesgo de desarrollar CAD, pero no se observó asociación con restenosis.

https://doi.org/10.24875/acm.21000039 21 downloads

13.

Dolosigranulum pigrum en absceso corneal
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Roitman, Karina L.

; Almuzara, Marisa N.

; Rodriguez, Mario Javier Fernández

; Basbus, Federico

; Cipolla, Lucía

; Barberis, Claudia M.

; Vay, Carlos A.

Revista argentina de microbiología

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jun 2022, Volume 54 N. 2 Pages 121 - 130

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen Dolosigranulum pigrum es un coco gram positivo, anaerobio facultativo, que forma parte de la microbiota oral y del tracto respiratorio superior. Aunque los reportes de infecciones por este microorganismo son escasos, se lo ha asociado a un amplio espectro de enfermedades infecciosas. Se describe el caso de un hombre adulto con un absceso corneal del que se aisló D. pigrum. El microorganismo fue identificado por espectrometría de masas (MALDI-TOF MS) y secuenciación del gen 16S ARNr. A su vez, se logró la identificación presuntiva mediante pruebas fenotípicas claves, como la disposición en racimos en la coloración de Gram, la prueba negativa de la catalasa, la producción de pirrolidonil arilamidasa y leucina aminopeptidasa, el crecimiento en NaCl al 6,5% y la hidrólisis de esculina. Los datos de la literatura y el presente caso respaldan la asociación del microorganismo con infecciones oculares, a menudo de curso destructivo, principalmente en pacientes de edad avanzada.

Abstract Dolosigranulum pigrum is a gram-positive, facultatively anaerobic coccus, which is part of the oral and upper respiratory tract microbiota. Although reports of infections by this microorganism are scarce, it has been associated with a wide spectrum of infectious diseases. The case of an elderly man with a lower corneal abscess, in which Dolosigranulum pigrum was isolated, is described. The microorganism was identified by mass spectrometry (MALDI-TOF MS) and by the sequencingof the 16S rRNAgene. Furthermore, the presumptive identification of the causative agent was achieved by using key phenotypic tests such as the cluster arrangement in Gram stain, the negative catalase test, the production of pyrrolidonyl arylamidase and leucine aminopeptidase activity, the growth in 6.5% NaCl and esculin hydrolysis. The data from the literature (and the present case) support the association of the microorganism with ocular infections, which often take a destructive course, mainly in elderly patients.

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14.

Caída de hojarasca y retorno de nutrientes en diferentes comunidades vegetales del Noreste de México
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Lopez-Hernandez, Juan M.

; Gonzalez-Rodriguez, Humberto

; Cantu-Silva, Israel

; Gomez-Meza, Marco V.

; Estrada-Castillon, Andres E.

; Contreras-Guajardo, Norma L.

; del Valle-Arango, Jorge I.

Ecosistemas y recursos agropecuarios

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apr 2022, Volume 9 N. 1 elocation e2891

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract The litterfall that accumulates in the forest soil and its further decomposition play an important roll in the maintenance of productivity in different terrestrial ecosystems since its constitute the main flow of nutrients to the soil. The objective of this study was to evaluate the production of litterfall, its nutrient return thru litterfall deposition and macronutrient use efficiency. The study was conducted in Linares, Crucitas and Los Ramones, state of Nuevo León, México. Average litterfall deposition was 5 800, 5 270 and 6 596 kg ha−1 year−1 for Linares, Crucitas and Los Ramones, respectively. Total nutrient return thru litterfall followed the sequence: Linares > Crucitas > Los Ramones, with value of 135, 122 and 101 kg ha−1 year−1, respectively. Even though the return of P thru litterfall was the lowest, P nutrient use efficiency was higher with respect to Ca, Mg and K. Greatest nutrient use efficiency in terms of Ca and Mg was observed in Los Ramones, K in Crucitas and P in Linares. The results showed that there exist spatial and temporal variation in the production of litterfall, nutrient return and nutrient use efficiency between studied sites. Thus, litterfall deposition, nutrient return and nutrient use efficiency between sites depend on stand composition and richness, edaphic properties, litterfall quality, and plant phenology.

Resumen La hojarasca que se acumula sobre el piso forestal y su posterior descomposición juegan un papel importante en el mantenimiento de la productividad de los diferentes ecosistemas terrestres al constituir el principal flujo de nutrientes al suelo. El objetivo del estudio fue evaluar la producción de hojarasca y retorno de nutrientes a través de la caída de la hojarasca y la eficiencia en el uso de macro-nutrientes. El estudio se realizó en los sitios de Linares, Crucitas y Los Ramones, en el Estado de Nuevo León, México. El promedio de caída de hojarasca fue de 5 800, 5 270 a 6 596 kg ha−1 año−1 para Linares, Crucitas y Los Ramones, respectivamente. El retorno total de nutrientes siguió la secuencia: Linares > Crucitas > Los Ramones con valores de 135, 122 y 101 kg ha−1 año−1, respectivamente. A pesar de que el retorno de P en la hojarasca fue menor, la eficiencia del uso de este nutriente fue mayor que la presentada por el Ca, Mg ó K. La mayor eficiencia de uso de nutrientes en términos de Ca y Mg se observó en Los Ramones, el K en Crucitas y el P en linares. Existe variación espacial y temporal en la producción de hojarasca, retorno de nutrientes y la eficiencia en su uso entre los sitios evaluados. Por tanto, la caída de hojarasca, retorno de nutrientes y uso eficiente en estos sitios dependen de la riqueza de especies, diferencias edáficas, calidad de la hojarasca y fenología de las diferentes especies.

https://doi.org/10.19136/era.a9n1.2891

15.

Apendicitis del muñón apendicular
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Blanco, Maitena

; Larrañaga, Nebil

; Rodriguez de la Hoz, Diana M.

; Ruiz, Kelly

; Ferrarotti, Carlos

; Vallejos, Javier

Medicina (Buenos Aires)

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feb 2022, Volume 82 N. 1 Pages 162 - 162

Abstract: Es | Text: Es | PDF: Es

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