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ABSTRACT: The cryopreservation of plant germplasm at ultralow temperatures is an alternative technique for the long-term storage of seeds of the genus Coffea sp. However, for this technique to be successful, cell integrity must be maintained at all stages of the process on the basis of scientific research. The present study investigated validated cryopreservation protocols for Coffea arabica L. seeds and evaluate the effects on the physiological and biochemical characteristics of the seeds at each stage of the process. Seeds were dried on silica gel or with saturated saline solution, precooled or not in a biofreezer, immersed in nitrogen, and reheated in a water bath. After each of these steps, the physiological and biochemical quality of the seeds was determined. Pre-cooling is a step that can be dispensed with in the cryopreservation of Coffea arabica seeds, direct immersion in liquid nitrogen being more indicated. Coffea arabica L. seeds tolerate cryopreservation after rapid drying in silica gel up to water contents of 17 or 20% (wb), with greater survival at 17%. The enzyme activities of catalase, polyphenol oxidase and peroxidase are indicators of the quality of C. arabica L. seeds subjected to cryopreservation.

RESUMO: A criopreservação de germoplasma vegetal em temperaturas ultrabaixas é uma alternativa para o armazenamento em longo prazo de sementes do gênero Coffea sp. Entretanto, para que essa técnica apresente sucesso, a realização de pesquisas que garantam a manutenção da integridade celular em todas as etapas do processo é de fundamental importância. O objetivo com o presente trabalho foi investigar protocolos de criopreservação validados para sementes de Coffea arabica L., avaliando separadamente, os efeitos sobre as características fisiológicas e bioquímicas das sementes, em cada etapa do processo. As sementes foram secadas em sílica gel ou em solução salina saturada, submetidas ou não ao pré-resfriamento em biocongelador, em seguida imersas no nitrogênio e reaquecidas em banho-maria. Após cada uma dessas etapas, a qualidade fisiológica e bioquímica das sementes foi determinada. O pré-resfriamento é uma etapa que pode ser dispensada na criopreservação de sementes de Coffea arabica, sendo mais indicada a imersão direta em nitrogênio líquido. Sementes de Coffea arabica L. toleram a criopreservação após secagem rápida em sílica gel até teores de água de 17 ou 20% (wb), com maior sobrevivência a 17%. A atividade das enzimas catalase, polifenoloxidase e peroxidase são indicadoras da qualidade de sementes de Coffea arabica L. submetidas à criopreservação.

https://doi.org/10.1590/0103-8478cr20220480

Un nuevo desafío: la escasez de intensivistas
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Irrazábal, Célica L.

; Reina, Rosa

Medicina (Buenos Aires)

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dec 2023, Volume 83 N. 5 Pages 858 - 860

Abstract: Es | Text: Es | PDF: Es

Déficit hídrico controlado y su efecto en el rendimiento y calidad de tres variedades de papa
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Sifuentes-Ibarra, Ernesto

; Ojeda-Bustamante, Waldo

; Macías-Cervantes, Jaime

; Merino-Leyva, Rosa Isabel

; Preciado-Rangel, Pablo

; Ruelas-Islas, Jesús del Rosario

Revista mexicana de ciencias agrícolas

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dec 2023, Volume 14 N. 8 elocation e3202

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

Abstract The quantity and quality of potato tubers are related to irrigation. We studied the effect of three levels of water deficit (L= low, M= medium, and H= high) on the yield and quality of three potato varieties (Fiana, Atlantic, and Ágata), induced by varying the parameter α3 of the maximum allowable deficit (MAD) function of a comprehensive irrigation programming model. The work was carried out in the north of Sinaloa, Mexico (autumn-winter cycle 2015-2016), using a design in divided plots with two factors and four repetitions, where the large plots were the levels of water deficit and the sub-plots were the varieties. There was a significant effect (p= 95%) on yield (Y) as it decreased by 3.65 t ha-1 in H compared to L. In the variety factor, Fiana and Ágata were the best in quantity and quality, with Fiana standing out with fewer noncommercial (NCO) tubers. In the water deficit-variety interaction, Fiana was the best, with more tubers of first and second quality (Q1 and Q2) in L. In M, Ágata was the best in Y but the lowest in Q1 and highest in deformed (DEF) and NCO. In H, the behavior was similar; Ágata was the best but with less Q1 and Q2 and a significant presence of DEF and NCO. A 29.5, 28.8, and 28.4 cm water requirement was estimated in L, M, and H, respectively. The behavior of Fiana suggests managing it under drip irrigation, while Ágata under gravity irrigation and limited water conditions.

Resumen La cantidad y calidad de tubérculos de papa están relacionados con el riego. Se estudió el efecto de tres niveles de déficit hídrico (B= bajo, M= medio y A= alto) en el rendimiento y calidad de tres variedades de papa (Fiana, Atlantic y Ágata), inducido al variar el parámetro α3 de la función máximo déficit permitido (MDP) de un modelo de programación integral del riego. El trabajo se realizó en el norte de Sinaloa, México (ciclo otoño-invierno 2015-2016), utilizando un diseño en parcelas divididas con dos factores y cuatro repeticiones, donde las parcelas grandes fueron los niveles de déficit hídrico y las sub-parcelas las variedades. Se tuvo efecto significativo (p= 95%) en rendimiento (Y) al reducirse 3.65 t ha-1 en A con respecto a B. En el factor variedades, Fiana y Ágata fueron las mejores en cantidad y calidad, destacando Fiana con menos tubérculos rezaga (REZ). En la interacción déficit hídrico-variedad, Fiana fue la mejor con más tubérculos de primera y segunda calidad (C1 y C2) en B. En M, Ágata fue la mejor en Y, pero la más baja en C1 y más alta en deformes (DEF) y REZ. En A, el comportamiento fue similar, Ágata fue la mejor, pero con menos C1 y C2 y presencia importante de DEF y REZ. Se estimó un requerimiento hídrico de 29.5, 28.8 y 28.4 cm en B, M y A respectivamente. El comportamiento de Fiana sugiere manejarla bajo goteo, mientras que Ágata en riego por gravedad y bajo condiciones limitadas de agua.

https://doi.org/10.29312/remexca.v14i8.3202

Hemorragia Intracerebral Imprevisible en un Hombre Joven: La Importancia de la Tomografía computarizada craneal post-mortem
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Álvarez Gómez, José Lev

; Dávila Toro, Francisco

; Conte Miller, Maria

; Cabello, Sofía

; Cruz De La Rosa, Kerwin

; Chévere Rivera, Jaime L.

; Santa-Rosario, Juan

; Sanabria Bellassai, Dario

Medicina Legal de Costa Rica

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dec 2023, Volume 40 N. 2 Pages 35 - 40

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

Abstract Sudden death occurs within 24 hours after the onset of symptoms and is characterized by being clinically inexplicable, sudden, and unexpected. Due to the nature of sudden death, it is not possible an accurate diagnosis without performing an autopsy. In this brief communication, we will evaluate the case of a 33-year-old cruise employee, with no prior medical/pharmacological history, who suddenly died while resting in his cabin. Due to initial suspicions of a possible cocaine overdose death, a comprehensive toxicology panel was performed, although yielding a negative result. A cranial computed tomography without contrast reversed the initial hypothesis and the neuropathological autopsy -surprisingly- confirmed that the true cause of death was the rupture of an unknown saccular aneurysm in the Circle of Willis.

Resumen La muerte súbita es aquella que ocurre dentro de las 24 horas posteriores al inicio de los síntomas y se caracteriza por ser clínicamente inexplicable, inesperada y repentina. Debido a la naturaleza de la muerte súbita, no es posible llegar a un diagnóstico preciso sin una autopsia. En esta comunicación breve, evaluaremos el caso de un empleado de crucero de 33 años, sin historial médico/farmacológico previo, el cual falleció súbitamente mientras reposaba en su camarote. Debido a las sospechas iniciales de una posible muerte causada por una sobredosis de cocaína, se le realizó un panel toxicológico abarcador el cual resultó negativo. Empero, una tomografía computarizada (TC) craneal sin contraste revirtió la hipótesis inicial y la autopsia neuropatológica -sorpresivamente- confirmó que la verdadera causa de muerte fue la ruptura de un aneurisma sacular desconocido en el polígono de Willis.

Loxoscelismo cutáneo-visceral por mordedura de araña Loxosceles laeta en niños: factores asociados
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Juárez S., Rosa

; Hernández I., Henry

; Valderrama P., Aldo

Revista de Investigaciones Veterinarias del Perú

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dec 2023, Volume 34 N. 6 elocation e24949

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

ABSTRACT The aim of this study was to determine factors associated with cutaneous-visceral loxoscelism in children due to a Loxosceles laeta spider bite. The research was retrospective, observational and longitudinal. The sample corresponded to all patients under 20 years of age treated at the National Institute of Children’s Health (n=74), who were transferred from less complex health facilities in the country with a diagnosis of L. laeta spider bite among the years 2010 to 2018. The categorical variables were contrasted with the Chi square test and Odds ratio with a 95% confidence interval. Additionally, a multivariate logistic regression was performed to establish possible associations. Results showed 45.9% of patients presented cutaneous-visceral loxoscelism and 54.1% cutaneous loxoscelism. January to March, summertime, were the months with the highest frequency of bites. Most patients came from Lima (58.1%) and Ayacucho (14.9%). Those who presented cutaneous-visceral loxoscelism were bitten on the thorax (88.2%), they came for treatment in less than 23 hours (72.7%), their stay in the hospital was less than 10 days (71.7%) and they were hospitalized in the nephrology service. The multivariate logistic regression analysis showed that cutaneous-visceral loxoscelism is related to the diagnosis ofanemia (OR=19.3). It isconcluded that anemia in children is a risk factor for cutaneousvisceral loxoscelism.

RESUMEN El objetivo del estudio fue determinar los factores asociados al loxoscelismo cutáneo-visceral en niños por mordedura de araña Loxosceles laeta. La investigación fue retrospectiva, observacional y longitudinal. La muestra correspondió a todos los pacientes menores de 20 años de edad atendidos en el Instituto Nacional de Salud del Niño (n=74), que fueron transferidos de establecimientos de salud del país de menor complejidad con diagnóstico de mordedura de araña L. laeta entre los años 2010 al 2018. Se contrastaron las variables categóricas con el Chi cuadrado y el Odds ratio con un intervalo de confianza al 95%. Además, se efectuó una regresión logística multivariada para establecer asociaciones posibles. El 45.9% de los pacientes presentaron loxoscelismo cutáneo-visceral y 54.1% loxoscelismo cutáneo. Enero a marzo, época de verano, fueron los meses de mayor frecuencia de mordedura. La mayoría de los pacientes procedían de Lima (58.1%) y Ayacucho (14.9%). Los que presentaban loxoscelismo cutáneo-visceral fueron mordidos en el tórax (88.2%), acudieron a ser atendidos en un tiempo menor a 23 horas (72.7%), su estancia en el hospital fue menor a 10 días (71.7%) y fueron hospitalizados en el servicio de nefrología. El análisis multivariado de regresión logística expuso que el loxoscelismo cutáneo-visceral está relacionado con el diagnóstico de anemia (OR=19.3). Se concluye que la anemia en los niños es un factor de riesgo de loxoscelismo cutáneo-visceral.

https://doi.org/10.15381/rivep.v34i6.24949

Análisis comparativo de las características clínicas, evolución y mortalidad de pacientes hospitalizados por COVID-19 durante la primera y segunda ola de la pandemia (REGISTRO ECCOVID)
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Córdova, Ezequiel

; Mykietiuk, Analia

; de Vedia, Lautaro

; Bacelar, Brenda

; Cáceres, María Florencia

; Nemirovsky, Corina

; Contreras, Rosa

; Alzogaray, Maria Fernanda

; Nannini, Esteban

; Consalvo, María Fernanda

; Soler Puy, Lucrecia

; Scapellato, Pablo G.

; Barcelona, Laura

; Golikow, Mariana L.

; Piñeiro, María Florencia

; Miño, Hugo J.

; Cabral, Myrna

; Lamponi Tappata, Lucía

; Lopardo, Gustavo

; Sued, Omar

; Stryjewski, Martín E.

Medicina (Buenos Aires)

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aug 2023, Volume 83 N. 4 Pages 551 - 557

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

Resumen Introducción : Las características clínicas y evolutivas de los pacientes con diagnóstico de COVID-19 pueden diferir entre las distintas olas de la pandemia. El objetivo de este estudio fue comparar las características clínicas, evolución y mortalidad de pacientes hospitalizados por COVID-19 durante la primera y segunda ola en Argentina. Métodos : Registro multicéntrico y prospectivo de pacientes ≥ 18 años con diagnóstico confirmado de COVID-19 internados en 18 hospitales de Argentina durante la primera (marzo a octubre 2020) y la segunda ola (marzo a julio 2021) de la pandemia. Se compararon variables demográficas, características clínicas, y evolu ción a 30 días. Resultados : Se incluyeron un total de 1691 pacien tes (primera ola n = 809, segunda ola n = 882). Los pa cientes hospitalizados durante la segunda ola tenían mayor edad (mediana 53 años vs. 61 años, p < 0.001), comorbilidades (71% vs. 77%, p = 0.007) y requerimiento de oxígeno (21% vs. 62%, p < 0.001). Durante la hospi talización, los pacientes de la segunda ola requirieron más oxigenoterapia (49% vs. 85%, p < 0.001), asistencia mecánica respiratoria (12% vs. 22%, p <0,001) y presen taron mayor mortalidad (11% vs. 26%, p < 0.001). Compa rando únicamente a los que requirieron oxigenoterapia durante la hospitalización, la mortalidad a los 30 días fue de 20% y 30% p < 0.001 en la primera y segunda ola respectivamente. Conclusión : Comparados con los pacientes interna dos durante la primera ola, los internados durante la segunda ola de SARS-CoV-2 en Argentina presentaron mayor gravedad y mortalidad.

Abstract Introduction : Clinical features and outcomes of SARS-CoV-2 infections may change between different waves of the pandemic. The objective of this study was to compare clinical characteristics and outcomes between two cohorts of patients hospitalized for COVID-19 during the first and second waves in Argentina. Methods : Multicenter and prospective registry of patients ≥18 years old with a confirmed diagnosis of COVID-19 admitted to 18 hospitals in Argentina during the first wave (March to October 2020) and second wave (March to July 2021) of the pandemic. Demographics, clinical characteristics, and outcomes of these patients were compared. Results : A total of 1691 patients were included (first wave n = 809, second wave n = 882). Hospitalized pa tients during the second wave were older (median 53 years vs. 61 years, p < 0.001), had more comorbidities (71% vs. 77%, p=0.007) and required more supplemental oxygen at admission (21% vs 62%, p < 0.001). During hos pitalization, patients of the second wave required more supplemental oxygen (49% vs. 85%, p < 0.001), invasive ventilation (12% vs. 22%, p < 0.001) and had higher 30- day mortality (11% vs. 26%, p < 0.001). Comparing only patients who required supplemental oxygen during hos pitalization, 30-day mortality was 20% and 30% p < 0.001 for the first and second wave, respectively. Conclusion : Compared to patients admitted during the first wave, patients admitted with SARS-CoV2 dur ing the second wave in Argentina were more seriously ill and had a higher mortality.

Historia taxonómica de Zephyranthes bifida (Neorhodophiala, Amaryllidaceae)
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Goyenetche, Juan M.

; Scaramuzzino, Rosa L.

; Arroyo Leuenberger, Silvia C.

Boletín de la Sociedad Argentina de Botánica

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aug 2023, Volume 58 N. 3 Pages 8 - 8

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

Summary Background and aims: Zephyranthes bifida (Amaryllidaceae) was recently included as the only polymorphic species of the subgenus Neorhodophiala. Its taxonomic history has not been reviewed, and it is a valuable contribution to elucidate the putative species complex that suggests the considerable morphological variation observed in its wide range of distribution. The present study aims to present the taxonomic history of Z. bifida with the complete list of synonyms, together with some morphological observations. M&M: Original publications, floras and digital databases were consulted. A table was prepared with the complete list of synonyms in which the scientific name, year and reference of the publication, type of taxonomic event and its synonyms were included. Within the framework of morphometric studies carried out with adult individuals from eight populations in the province of Buenos Aires, certain character measurements were found to be novel compared to the descriptions of Z. bifida. Results and conclusions: Forty-nine taxonomic events were recorded. Based on our study, we propose to include two new synonyms for Z. bifida and recognize one name as illegitimate; thereby, it currently is associated to 43 legitimate synonyms, three illegitimate names, and two isonyms without nomenclatural status. Monitoring of cultivated specimens allowed us to observe that the same bulb can generate inflorescences with both spathe types, ruling out the hypothesis that this morphological variation could correspond to different taxa.

Resumen Introducción y objetivos: Zephyranthes bifida (Amaryllidaceae) fue incluida recientemente como única especie polimórfica del subgénero Neorhodophiala. Su historia taxonómica no ha sido reseñada, pudiendo tratarse de un aporte valioso para dilucidar el posible complejo de especies que sugiere la gran variación morfológica observada en su amplio rango de distribución. El presente trabajo tiene como objetivo presentar la historia taxonómica de Z. bifida con la lista completa de sinónimos, junto con algunas observaciones morfológicas. M&M: Se consultaron publicaciones originales, floras y bases de datos digitales. Se elaboró una tabla con la lista completa de sinónimos en la que se incluyó para cada uno, el nombre científico, año y referencia de la publicación, tipo de evento taxonómico y sus sinónimos. En el marco de estudios morfométricos realizados con individuos adultos de ocho poblaciones de la provincia de Buenos Aires, se encontraron ciertas medidas de caracteres que resultaron novedosas al compararlas con las descripciones de Z. bifida. Resultados y conclusiones: Se registraron 49 eventos taxonómicos. A partir del estudio realizado, se propone incluir dos sinónimos nuevos para Z. bifida y reconocer un nombre como ilegítimo, de modo que actualmente se asocia con 43 sinónimos legítimos, tres nombres ilegítimos y dos isónimos sin estatus nomenclatural. El seguimiento de ejemplares cultivados permitió observar que un mismo bulbo puede generar inflorescencias con los dos tipos de espata, descartándose la hipótesis de que esta variación morfológica podría corresponder a taxones diferentes.

https://doi.org/10.31055/1851.2372.v58.n3.40276

Efectos del tratamiento de semillas de frijol caupí Vigna unguiculata L. sobre el manejo de la marchitez vascular causada por Scleroctium rolfsii
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Campo-Arana, Rodrigo Orlando

; Burgos-Ayala, Pabla Rosa

Revista de Investigaciones Altoandinas

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jul 2023, Volume 25 N. 3 Pages 190 - 198

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

Abstract The cowpea bean is a legume of economic importance for small producers in the Caribbean, Colombia; however, grain production is affected by MV vascular wilt, caused by Scleroctium rolsii, causing losses of up to 50 %. The objective of the research was to evaluate the effect of seed treatment in the management of MV. Two experiments were established, the first one was done in the laboratory, determining the active ingredient and dose that does not affect the emergence and development of the seedlings. The second was carried out in a mesh house, where the seeds were treated with the molecules and the best dose identified in the first experiment. The second experiment was established with the Caupicor 50 variety, under a completely randomized design with four repetitions. The treatments evaluated were the following: T0: absolute control, T1: Calcium nitrate (1.0 g l-1), T2: Azoxystrobin + Difenoconazole (1.0 cc l-1); T3: Trichoderma harzianum, (3.0 g Kg-1); T4: Benomyl (2.0 g Kg-1); T5: Carboxim + Thiram (2.0 g Kg-1); T6: potassium phosphite (2.0 g L-1) and T7: negative control, unprotected seeds. The treated bean seeds will be sown in disinfected soil and inoculated with a strain of Scleroctium folfsii. Every four days evaluations of incidence, severity and height were carried out. The most efficient treatments in the management of MV were T2, T3 and T5; however, T2= Azoxystrobin+difecobazol affected seedling emergence.

Resumen El frijol caupí, es una leguminosa de importancia económica de los pequeños productores del Caribe, colombiano; sin embargo, la producción del grano es afectada por la marchitez vascular MV, causada por Scleroctium rolsii, ocasionando pérdidas hasta del 50 %. El objetivo de la investigación, fue evaluar el efecto del tratamiento de semillas en el manejo de la MV. Se establecieron dos experimentos, el primero se hizo en el laboratorio, determinando ingrediente activo y dosis que no afecte la emergencia y el desarrollo de las plántulas. El segundo se realizó en casa de mallas, donde las semillas fueron tratadas con las moléculas y la mejor dosis identificada en el primer experimento. El segundo experimento se estableció con la variedad Caupicor 50, bajo un diseño completamente al azar con cuatro repeticiones. Los tratamientos evaluados fueron los siguientes: T0: testigo absoluto, T1: Nitrato de calcio (1,0 g l-1), T2: Azoxystrobin + Difenoconazol (1,0 cc l-1); T3: Trichoderma harzianum, (3,0 g Kg-1); T4: Benomil (2,0 g Kg-1); T5: Carboxim + Thiram (2,0 g Kg-1); T6: fosfito de potasio (2,0 g L-1) y T7: testigo negativo, semillas sin protección. Las semillas de frijol tratadas, se sembrarán en suelo desinfectado y se inocularon con una cepa de Scleroctium folfsii. Cada cuatro días se realizaron evaluaciones de incidencia, severidad y altura. Los tratamientos más eficientes en el manejo de la MV, fueron T2, T3 y T5; sin embargo, el T2= Azoxystrobin+difecobazol, afectó la emergencia de las plántulas.

https://doi.org/10.18271/ria.2023.530

Children and adolescents with non-Hodgkin lymphoma in Brazil: A national survey identifies the challenges encountered and documents the diversity of care
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Costa, Ana Rosa S.

; Costa, Juliana T.

; Breviglieri, Carla Nolasco Monteiro

; Melgares, Lucélia M.P.

; Godinho, Patrick R.

; Metzger, Monika L.

Hematology, Transfusion and Cell Therapy

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jul 2023, Volume 45 Suppl. 2 Pages S36 - S42

Abstract: En | Text: En | PDF: En

ABSTRACT Introduction: Brazil has many inequities in the healthcare provided nationwide. Therefore, in order to access challenges in treatment, available resources and current practices, to identify barriers in delivering a good quality of care among Brazilian centers treating children and adolescents with Non-Hodgkin Lymphoma (NHL) and to generate a future prospective guideline, a customized online survey was distributed to pediatric hematologists and oncologists across the country. Results: A total of 97 surveys were completed (35% response rate), from 47 cities in all Brazilian regions and 79 units of care, with a median of 1 answer by the center (range 1 - 5). Most respondents work at an institution supported exclusively by public/philanthropic resources (58%), with an average of 5 to 9 new cases/year (49%), and 41% have 4 to 6 oncologists/centers. Additionally, 22% have no easy access to the intensive care unit, 26% have no access to Rasburicase, 28% have no access to Rituximabe as front-line therapy and 41% have unreliable methotrexate monitoring levels. Those differences cannot be explained thoroughly by regional wealth variances, nor by the financing model. Regarding the pathology service, 70% consider having reasonable quality assistance, but the timeframe to deliver diagnosis is satisfactory to 46%. There is no uniform management of care, with the current guideline from the Sociedade Brasileira de Oncologia Pediátrica being adopted by 54 to 59%, depending on the NHL subtype. Conclusion: This study provides insights into the heterogeneity of care among Brazilian centers. Recognizing those diversities will support the design of effective strategies and collaboration nationwide.

https://doi.org/10.1016/j.htct.2021.11.013

10.

Presión arterial en recién nacidos sanos de término y pretérmino tardío en la Ciudad de México
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Medina-Zamora, Rosa L.

; Hernández-Benítez, Rodrigo

; Vidaña-Pérez, Dèsirée

; Iglesias-Leboreiro, José

; Bernárdez-Zapata, Isabel

; Saldaña-Vargas, Ricardo

; Ocampo-Vázquez, Celia M.

; Cenoz-Acero, Daniela

Archivos de cardiología de México

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jun 2023, Volume 93 N. 2 Pages 149 - 155

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

Resumen Objetivo: Describir medidas de presión arterial sistólica (PAS), diastólica (PAD) y media (PAM) en recién nacidos sanos de término y pretérmino tardío para establecer parámetros de normalidad. Método: Estudio transversal realizado en el cunero fisiológico del Hospital Español, Ciudad de México. Se incluyeron 551 pacientes recién nacidos sanos. Las tomas de PA fueron realizadas dentro de las primeras 48 horas de vida con método oscilométrico. Posterior a la evaluación de normalidad, se realizó un análisis descriptivo de la población y cálculo de percentiles (25, 50 y 75) específicos para cada semana de gestación. Todos los análisis fueron realizados en STATA v14.2. Resultados: Los recién nacidos de sexo masculino tuvieron un valor medio de PAS de 64.6 mmHg en la semana 35 de gestación, este valor aumentó a 69.8 mmHg en la semana 40. El valor de la PAD fue de 42.6 mmHg en la semana 35 de gestación, disminuyendo a 40.8 mmHg para la semana 40. Los valores medios de PAS en los recién nacidos de sexo femenino fueron de 65.5 mmHg en la semana 35, teniendo un incremento a 73.5 mmHg en la semana 40. El valor de la PAD en la semana 35 de gestación fue 38 mmHg, incrementando a 41.3 mmHg en la semana 40. Conclusiones: Los valores de PA en recién nacidos sanos se modifican con la edad gestacional y el sexo. Estos resultados pueden servir como referencia para otros médicos ubicados en países o ciudades con alturas similares a la Ciudad de México.

Abstract Objective: Describe the measurements of systolic, diastolic and mean blood pressure in healthy term and late preterm newborns to establish normal values. Methods: Cross-sectional study carried out in the nursery of the Hospital Español, located in Mexico City. A sample of 551 healthy newborns were included in the study. Blood pressure (BP) measurements were taken within the first 48 hours of life with the oscillometric method. After the evaluation of normality, a descriptive analysis of the population and calculation of percentiles (25, 50 and 75) specific for each week of gestation was performed. All analyzes were performed in STATA v14.2. Results: Male newborns had a mean SBP value of 64.6 mmHg at week 35 of gestation, this value increased to 69.8 mmHg at week 40; the systolic blood pressure (SBP) value was 42.6 mmHg at week 35 of gestation, which decreased to 40.8 mmHg at week 40. The mean SBP values in female newborns were 65.5 mmHg at week 35, increasing to 73.5 mmHg at week 40; the diastolic blood pressure (DBP) value at week 35 of gestation was 38 mmHg, increasing to 41.3 mmHg at week 40. Conclusions: The BP values in healthy newborns are modified by the gestational age and sex of the patients. These results can serve as a reference for other physicians located in countries or cities with a similar altitude than the one in Mexico City.

https://doi.org/10.24875/acm.21000160

11.

Romulea rosea (Iridaceae, Ixieae), primer registro para la Flora Argentina
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Goyenetche, Juan M.

; Scaramuzzino, Rosa L.

Bonplandia

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jun 2023, Volume 32 N. 1 Pages 109 - 118

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

Resumen: En este trabajo se menciona por primera vez para la Argentina la presencia deRomulea rosea(L.) Eckl. (Iridaceae, Ixieae), especie sudafricana que ha invadido Australia y otros países. Fue hallada en el Sistema Orográfico de Tandilia, provincia de Buenos Aires. Se presenta la descripción de la especie, sinonimia, usos, distribución geográfica y hábitat, fenología y estado de la invasión. También se provee una clave para distinguir el géneroRomuleade otros géneros de la tribu Ixieae presentes en el país.

Summary: In this work, the presence ofRomulea rosea(L.) Eckl. (Iridaceae, Ixieae), a South African species that has invaded Australia and other countries, is mentioned for the first time for Argentina. It was found in the orographic Tandilia System, Buenos Aires province. A description of the species, synonymy, uses, geographic distribution and habitat, phenology and invasion status are presented. A key to distinguish the genusRomuleafrom other genera of the Ixieae tribe present in the country is also provided.

https://doi.org/10.30972/bon.3216439

12.

Multispectral images for discrimination of sources and doses of fertilizer in coffee plants
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Rezende, Camila Isabel Pereira

; Assis, Gleice Aparecida de

; Martins, George Deroco

; Carvalho, Fábio Janoni

; Franco, Miguel Henrique Rosa

; Araújo, Nathalia Oliveira de

Revista Ceres

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jun 2023, Volume 70 N. 3 Pages 54 - 63

Abstract: En | Text: En | PDF: En

ABSTRACT Remote monitoring of the management of coffee crops is necessary as the demand in decision-making, where the aim is to rise production based on sustainable management is in a constant growth. In this work, it was evaluated the potential of images obtained by low-cost sensors in the discrimination of sources and doses of mineral and organomineral fertilizers in coffee. The experimental design was in randomized blocks, with five blocks and six treatments, as follows: (T1) - 100% of the organomineral treatment; (T2) - 70% of the organomineral treatment; (T3) - 50% of the organomineral treatment; (T4) - 100% of mineral fertilization; (T5) - standard treatment of the farm and (T6) - 70% of mineral fertilization. After management, we used the Mapir 3 Survey3W camera coupled to an ARP drone – Phantom4 to take images of the experiment over a 12-month vegetative period. Combined with image taking, it was collected agronomic parameters of coffee growth and productivity for two crops and concluded that different fertilization doses did not significantly affect the analyzed parameters. Based on the supervised classification of multispectral images, it was possible to discriminate treatments with a higher degree of accuracy (86.66% accuracy) than when analyzing coffee growth parameters.

https://doi.org/10.1590/0034-737x202370030006

13.

Characterization by near infrared spectroscopy of seeds and oils of Amaranthus spp. as a function of cropping systems
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Mavaieie, Denilson Paulo da Rosa

; Souza, Douglas Correa de

; Ramalho, Fernanda Maria Guedes

; Mavaieie, Valquíria de Fatima Ferreira

; Resende, Luciane Vilela

; Guimarães, Renato Mendes

Revista Ceres

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jun 2023, Volume 70 N. 3 Pages 30 - 39

Abstract: En | Text: En | PDF: En

ABSTRACT Species of the Amaranthus genus are very versatile and have potential for the application in the development of commercial products. The near infrared spectroscopy (NIR) is an efficient tool that can help in the quality control of products, quickly and non-destructive to the sample. The goal of this study was to carry out the distinction of seed and oils of different Amaranthus species using the near infrared spectroscopy. Three species were used: A. viridis L., A. hybridus L. e Amaranthus sp. (commercial). The spectra acquired from the sample using the near infrared spectroscopy were submitted to the partial least squares discriminant analysis (PLS-DA) and to the principal component analysis (PCA). Through PCA, it was possible to differentiate the Amaranthus species both for seeds and oils. Through PLS-DA, it was possible to predict the classes of the species with high degree of correct classification, with 96.67% of correct classifications for seeds and 98.89% for oil. Thus, with the use of the near infrared spectroscopy associated with the multivariate statistical analysis, it is possible to classify the different Amaranthus species, especially when using the oil.

https://doi.org/10.1590/0034-737x202370030004

14.

Forecasting occurrence of palm weevil Rhynchophorus palmarum L. (Coleoptera, Curculionidae) using Autoregressive Integrated Moving Average modeling
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Pacheco-Sánchez, Eduardo L.

; Guamani-Quimis, Lenin A.

; Rosa, Cinara Ewerling da

; Portalanza, Diego

; Mieles, Alejandro E.

; Garcés-Fiallos, Felipe R.

Scientia Agropecuaria

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apr 2023, Volume 14 N. 2 Pages 171 - 178

Abstract: En | Text: En | PDF: En

Abstract Oil palm (Elaeis guineensis L.) is a crucial crop in Ecuador, considerably affected by black palm weevil Rhynchophorus palmarum L. (Coleoptera: Curculionidae) for several years. Despite its importance, the behavior of the black weevil in Ecuador is not well comprehended presently. Therefore, this study aimed to predict infestation patterns of the black palm weevil in Ecuador using a mathematical model based on monitoring data. Data on the number of insects per trap from a commercial oil palm farm in Quinindé, Ecuador, was collected every two weeks for five years (2016-2020) and analyzed using the Classical Fourier (CF) spectrum and the Dickey-Fuller test to determine seasonality. The trend component of the data dropped from 16.33 in January 2017 to 11.96 in January 2019, with a fluctuation ranging from -0.11 to 2.50 observed for the entire data set. The results obtained after fitting the model ranged from -0.11 to 3.19, with a maximum of 5.30. The augmented Dickey-Fuller (ADF) test for the black weevil time series yielded a result of -5.60 (P<0.01). The partial autocorrelation ranged from -0.35 to 0.1. Based on our model, we projected the occurrence of black palm weevil from 2021 to 2024, with a fluctuation in the number of insects per trap ranging from 12.68 in January 2021 to 13.023 in November 2023. This model can be used to predict future insect occurrences in Ecuador, providing valuable insights into the behavior of the black weevil and using it for effective development control measures for this pest.

https://doi.org/10.17268/sci.agropecu.2023.015

15.

Microperforated-based modified atmosphere incorporated with vapors of oregano essential oil to preserve blackberry fruits in postharvest
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Martínez-López, Angélica

; Valle-Guadarrama, Salvador

; Guerra-Ramírez, Diana

; Arevalo-Galarza, Ma. de Lourdes Catalina

; Sánchez-Fernández, Rosa Elvira

Revista Chapingo. Serie horticultura

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apr 2023, Volume 29 N. 1 Pages 53 - 71

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

Abstract Blackberry fruits have a shelf life of 3 d at ambient temperature, due to fungal development. Essential oils (Eo) can increase shelf life because of their antifungal potential. The objective was to evaluate the use of modified atmosphere packaging incorporated with vapors of an Eo to prolong shelf life of blackberry fruits. The methodology included the use of oregano Eo to inhibit fungi development. Eo was analyzed with gas chromatography-mass spectrometry. The minimum inhibitory concentration of Eo to inhibit fungi in blackberry fruits was determined in vitro and in vivo. The storage of blackberry fruits under modified atmosphere with vapors of oregano Eo was evaluated at ambient temperature. The compounds linalool, o-cymene, and thymol were identified as the main constituents of Eo. Based on fruits with fungal development, isolates were made in culture media and the presence of Aspergillus carbonarius, Alternaria alternata, and Penicillum digitatum was identified. A minimum inhibitory concentration of Eo in the head space of fruits was found with value of 0.8 µL·mL-1. The handling of blackberry fruits in modified atmosphere with micro-perforation and exposition to volatilized Eo (MAP-Eo) reduced the rate of weight loss, the loss of consistency, and that of alteration of color attributes, which allowed maintaining a better appearance during 6-7 d at 23 °C. MAP-Eo kept the content of phenolic compounds and anthocyanins, as well as the antioxidant capacity, without significant changes. In conclusion, MAP-Eo is a useful alternative to extend shelf life of blackberry fruits.

Resumen Los frutos de zarzamora tienen una vida de anaquel de tres días a temperatura ambiente debido al desarrollo de hongos. Los aceites esenciales (Ae) pueden prolongar esta etapa por su potencial antifúngico. El objetivo fue evaluar el uso de empaques de atmósfera modificada incorporados con vapores de un Ae para prolongar la vida de anaquel de frutos de zarzamora. La metodología incluyó el uso de Ae de orégano para inhibir el desarrollo de hongos. El Ae se analizó mediante cromatografía de gases-espectrometría de masas. La concentración inhibitoria mínima del Ae para los hongos en frutos de zarzamora fue determinada tanto in vitro como in vivo. El almacenamiento de frutos de zarzamora en atmósfera modificada con vapores de Ae de orégano se evaluó a temperatura ambiente. Los compuestos linalol, o-cimeno y timol se identificaron como los componentes principales del Ae. A partir de frutos con desarrollo de hongos, se realizaron aislamientos en medios de cultivo y se identificó la presencia de Aspergillus carbonarius, Alternaria alternata y Penicillum digitatum. Se encontró que la concentración inhibitoria mínima es de 0.8 µL·mL-1 en el espacio de cabeza de los frutos. El manejo de frutos de zarzamora en atmósfera modificada con microperforado y exposición a vapores de Ae (EAM-Ae) redujo la tasa de pérdida de peso, la pérdida de consistencia y la tasa de alteración de los atributos del color, lo cual permitió mantener una mejor apariencia durante 6-7 días a 23 °C. La EAM-Ae mantuvo los compuestos fenólicos, las antocianinas y la capacidad antioxidante, sin cambios significativos. En conclusión, la EAM-Ae es una alternativa útil para prolongar la vida de anaquel de los frutos de zarzamora.

https://doi.org/10.5154/r.rchsh.2022.07.010

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