The genus Cuernavaca (Hemiptera: Dictyopharidae), associated with Pontederiaceae in South America, with redescription and new records of C. inexacta (Walker).

Abstract. The aim of this paper is to shed light on the boundaries of two sympatric species of Cuernavaca, C. inexacta and C. longula, to enable further ecological studies. Species in this genus are associated with water hyacinths in wetlands of Northeastern Argentina (Paraná-Paraguay waterway system) and the Peruvian Amazon. This work lists new host records for Cuernavaca, which include Pontederia crassipes, P. cordata, P. subovata and P. rotundifolia (Pontederiaceae). A redescription for C. inexacta with new diagnostic genitalic features is also provided, as well as an updated identification key and a distribution map. The genus is distributed throughout Central and South America, reaching north and central Argentina in its southernmost distribution.Fil: Marino, Ana Maria. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Hernández, María Cristina. Fundación para el Estudio de Especies Invasivas; ArgentinaFil: Sosa, Alejandro Joaquín. Fundación para el Estudio de Especies Invasivas; ArgentinaFil: Oleiro, Marina Ines. Fundación para el Estudio de Especies Invasivas; Argentin

Análisis de los recursos didácticos en la Web para nivel de educación básica.

Actualmente vivimos en un mundo de cambios radicales y vertiginosos en lo social, cultural, tecnológico, político y económico, mismos que demandan una permanente formación y capacitación de recursos humanos que contribuyan y respondan a las nuevas necesidades y demandas sociales. Por ello, las instituciones educativas en nuestro país se encuentran en un proceso constante de formación e implementación de proyectos y programas que permitan la utilización de la Internet y las Nuevas Tecnologías como una herramienta poderosísima al alcance, como un lugar de encuentro virtual, como medio de comunicación y como fuente de informaciones diversas, pero también como lugar donde publicar nuevos contenidos

The genus Cuernavaca (Hemiptera: Dictyopharidae), associated with Pontederiaceae in South America, with redescription and new records of C. inexacta (Walker)

The aim of this paper is to shed light on the boundaries of two sympatric species of Cuernavaca, C. inexacta and C. longula, to enable further ecological studies. Species in this genus are associated with water hyacinths in wetlands of Northeastern Argentina (Paraná-Paraguay waterway system) and the Peruvian Amazon. This work lists new host records for Cuernavaca, which include Pontederia crassipes, P. cordata, P. subovata and P. rotundifolia (Pontederiaceae). A redescription for C. inexacta with new diagnostic genitalic features is also provided, as well as an updated identification key and a distribution map. The genus is distributed throughout Central and South America, reaching north and central Argentina in its southernmost distribution

Validación de la remoción de azo compuestos con carbón activado de exoesqueleto de camarón

El carbón activado (CA) es un material poroso, cuyos principales precursores son de origen vegetal, dichos precursores se componen de estructuras carbonosas, por ejemplo, la celulosa. Por otra parte, y derivado del uso del carbón activado en tratamientos de agua residual, se ha incursionado en usar precursores como el caucho y residuos de animales, aunque con algunas limitaciones. El exoesqueleto de camarón es un residuo generado en zonas costeras que no es reutilizado y que posee cantidades significativas de quitina, la cuál es el segundo polímero más abundante solo después de la celulosa. Por lo anterior, el objetivo del presente proyecto fue obtener carbón activado a partir de residuos de exoesqueleto de camarón para remover azo compuestos de muestras de agua. Se utilizó H3PO4  como agente activante al 20 %, 30 % y 40 %, además de evaluar la relación volumen-materia carbonosa. Las muestras a tratar fueron soluciones de azul de metileno a 1000 ppm, con ello se obtuvieron isotermas de adsorción, así como cinéticas de adsorción con respecto al tiempo y al efecto de la cantidad de CA utilizado. El mejor porcentaje de remoción de azul de metileno obtenido fue del 90.59 % con H3PO4 al 20 %, en tanto que en los parámetros fisicoquímicos evaluados en las muestras de agua a tratar no presentaron diferencias significativas

La restauración de Sambucus palmensis en La Gomera: Conservación genética y modelización de nicho climático

La conservación de especies vegetales amenazadas a menudo conlleva la restauración de sus poblaciones naturales, ya sea mediante el refuerzo de las poblaciones existentes, la reintroducción de poblaciones extintas o la introducción de nuevos núcleos. Antes de comenzar acciones de restauración, es esencial conocer la biología de las especies con el fin de determinar los factores más importantes que limitan el crecimiento de la población fundadora (Heywood & Iriondo, 2003

Determination of the mechanical properties of anterior column units and functional spinal units of the l3-l4 lumbar porcine segment

Porcine specimens have proven to be an excellent option for experimental studies of the spine, due to the anatomically and biomechanically similarities with that of the human; however, there are differences that should be taken into account when comparing both specimens. The objective of this study is to determine the stiffness coefficient of the L3-L4 lumbar porcine segment by means of axial compression tests performed on Anterior Column Units (ACU’s) and Functional Spinal Units (FSU’s), in order to compare the results obtained with the information found in the literature for the human case. The results showed that the FSU's support approximately 22% more load compared to ACU's, which approximates to the 18% found for the human case. It can be concluded that characteristics such as the vertebrae morphometry has a direct impact on the mechanical properties of the ACU’s and the FSU’s

Desarrollo de prototipo de infraestructura en la nube para la Corporación Cristiana de Radio y Televisión ELIM

Se presenta el desarrollo de un prototipo de infraestructura en la nube para la Corporación Cristiana de Radio y Televisión ELIM usando OpenStack y Cep

Efficacy of phage therapy in preclinical models of bacterial infection: a systematic review and meta-analysis.

BACKGROUND Antimicrobial resistance of bacterial pathogens is an increasing clinical problem and alternative approaches to antibiotic chemotherapy are needed. One of these approaches is the use of lytic bacterial viruses known as phage therapy. We aimed to assess the efficacy of phage therapy in preclinical animal models of bacterial infection. METHODS In this systematic review and meta-analysis, MEDLINE/Ovid, Embase/Ovid, CINAHL/EbscoHOST, Web of Science/Wiley, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, and Google Scholar were searched from inception to Sept 30, 2021. Studies assessing phage efficacy in animal models were included. Only studies that assessed the efficacy of phage therapy in treating established bacterial infections in terms of survival and bacterial abundance or density were included. Studies reporting only in-vitro or ex-vivo results and those with incomplete information were excluded. Risk-of-bias assessment was performed using the Systematic Review Centre for Laboratory Animal Experimentation tool. The main endpoints were animal survival and tissue bacterial burden, which were reported using pooled odds ratios (ORs) and mean differences with random-effects models. The I2 measure and its 95% CI were also calculated. This study is registered with PROSPERO, CRD42022311309. FINDINGS Of the 5084 references screened, 124 studies fulfilled the selection criteria. Risk of bias was high for 70 (56%) of the 124 included studies; therefore, only studies classified as having a low-to-moderate risk of bias were considered for quantitative data synthesis (n=32). Phage therapy was associated with significantly improved survival at 24 h in systemic infection models (OR 0·08 [95% CI 0·03 to 0·20]; I2=55% [95% CI 8 to 77]), skin infection (OR 0·08 [0·04 to 0·19]; I2 = 0% [0 to 79]), and pneumonia models (OR 0·13 [0·06 to 0·31]; I2=0% [0 to 68]) when compared with placebo. Animals with skin infections (mean difference -2·66 [95% CI -3·17 to -2·16]; I2 = 95% [90 to 96]) and those with pneumonia (mean difference -3·35 [-6·00 to -0·69]; I2 = 99% [98 to 99]) treated with phage therapy had significantly lower tissue bacterial loads at 5 ± 2 days of follow-up compared with placebo. INTERPRETATION Phage therapy significantly improved animal survival and reduced organ bacterial loads compared with placebo in preclinical animal models. However, high heterogeneity was observed in some comparisons. More evidence is needed to identify the factors influencing phage therapy performance to improve future clinical application. FUNDING Swiss National Foundation and Swiss Heart Foundation

Polyvalent Bacterial Lysate with Potential Use to Treatment and Control of Recurrent Urinary Tract Infections

Overuse of antimicrobials has greatly contributed to the increase in the emergence of multidrug-resistant bacteria, a situation that hinders the control and treatment of infectious diseases. This is the case with urinary tract infections (UTIs), which represent a substantial percentage of worldwide public health problems, thus the need to look for alternatives for their control and treatment. Previous studies have shown the usefulness of autologous bacterial lysates as an alternative for the treatment and control of UTIs. However, a limitation is the high cost of producing individual immunogens. At the same time, an important aspect of vaccines is their immunogenic amplitude, which is the reason why they must be constituted of diverse antigenic components. In the case of UTIs, the etiology of the disease is associated with different bacteria, and even Escherichia coli, the main causal agent of the disease, is made up of several antigenic variants. In this work, we present results on the study of a bacterial lysate composed of 10 serotypes of Escherichia coli and by Klebsiella pneumoniae, Klebsiella aerogenes, Enterococcus faecalis, Proteus mirabilis, Citrobacter freundii, and Staphylococcus haemolyticus. The safety of the compound was tested on cells in culture and in an animal model, and its immunogenic capacity by analysing in vitro human and murine macrophages (cell line J774 A1). The results show that the polyvalent lysate did not cause damage to the cells in culture or alterations in the animal model used. The immunostimulatory activity assay showed that it activates the secretion of TNF-α and IL-6 in human macrophages and TNF-α in murine cells. The obtained results suggest that the polyvalent lysate evaluated can be an alternative for the treatment and control of chronic urinary tract infections, which will reduce the use of antimicrobials

Inclusive education and remote education in rural areas of northern Peru

A documentary review was carried out on the production and publication of research papers related to the study of the variable Inclusive education and remote education in rural areas of northern Peru. The purpose of the bibliometric analysis proposed in this document, is to know the main characteristics of the volume of publications registered in Scopus database during the period 2016-2020 in Latin American countries, achieving the identification of 15 publications. The information provided by said platform was organized by means of tables and figures categorizing the information by Year of Publication, Country of Origin, Area of Knowledge and Type of Publication. Once these characteristics were described, the position of different authors regarding the proposed topic was referenced by means of a qualitative analysis. Among the main findings of this research, Brazil, with 6 publications, is the Latin American country with the highest production. The area of knowledge that made the greatest contribution to the construction of bibliographic material referring to the study of inclusive education and remote education was social sciences with 11 published documents, and the type of publication that was most used during the above-mentioned period was the journal article, which represents 93% of the total scientific productionCampus Lima Nort