The antimicrobial activities of ethanolic and hexane extracts of nine species of marine macroalgae collected in the intertidal zone of the San Francisco beach, Ancón, in Lima, Peru were evaluated. It was performed in vitro against a panel of standard Gram-positive bacteria (Staphylococcus aureus ATCC 6538, Bacillus subtilis ATCC 6633 and Enterococcus faecalis ATCC 51922) and Gram-negative (Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 9027 and Salmonella Typhimurium 14028). The ethanolic extracts were of higher yield (67%) compared to hexanes (33%), especially against the Gram-positive, being the extract obtained from Ulva enteromorpha var. intestinalis and U. nematoidea the most efficient against S. aureus ATCC 6538 (74.1 and 78.2% inhibition, respectively). The ethanol extracts of Cladophora sp and U. nematoidea against B. subtilis ATCC 6633 showed moderate to low inhibitio...

The antimicrobial activities of ethanolic and hexane extracts of nine species of marine macroalgae collected in the intertidal zone of the San Francisco beach, Ancón, in Lima, Peru were evaluated. It was performed in vitro against a panel of standard Gram-positive bacteria (Staphylococcus aureus ATCC 6538, Bacillus subtilis ATCC 6633 and Enterococcus faecalis ATCC 51922) and Gram-negative (Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 9027 and Salmonella Typhimurium 14028). The ethanolic extracts were of higher yield (67%) compared to hexanes (33%), especially against the Gram-positive, being the extract obtained from Ulva enteromorpha var. intestinalis and U. nematoidea the most efficient against S. aureus ATCC 6538 (74.1 and 78.2% inhibition, respectively). The ethanol extracts of Cladophora sp and U. nematoidea against B. subtilis ATCC 6633 showed moderate to low inhibitio...

Conferencia pronunciada en el Círculo Filipino, de Madrid, el día 15 de abril de 1953

El objetivo de la investigación fue determinar la relación entre la motivación y el rendimiento académico de los cadetes de Cuarto Año de Infantería de la Escuela Militar de Chorrillos “Coronel Francisco Bolognesi”, 2024. La metodología empleada fue de enfoque cuantitativo con un diseño no experimental transversal, de tipo descriptivo-correlacional. La población de estudio estuvo compuesta por 86 cadetes, se trabajó con una muestra de 70 cadetes; se seleccionó una muestra de 70 cadetes mediante un muestreo aleatorio probabilístico. Se utilizó la técnica de encuesta para la recolección de datos, aplicando un cuestionario estructurado con una escala Likert para medir la motivación y el rendimiento académico. Los datos fueron analizados utilizando el software SPSS, y se empleó la prueba de correlación de Spearman para comprobar la relación entre las variables. Los re...

The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This project was partially funded by CONCYTEC within the framework of the 027-2015-FONDECYT Agreement.

This project was funded by CONCYTEC within the framework of the 027-2015- FONDECYT Agreement.

Tree-ring research (TRR) in South America (SA) continues to make important contributions in multiple sub-disciplines, including dendrochemistry and dendrohydrology. This report describes some of the advances in TRR in SA presented in a two-day International Meeting Research entitled "An International Network to Promote Advances in Dendrochronology in South America", organized by the Laboratory of Dendrochronology and Environmental Studies of the Pontifical Catholic University of Valparaíso in Valparaíso, Chile, on January 21-22, 2019. The objective of the meeting was to communicate recent advances in TRR within a network of laboratories in Argentina, Brazil, Chile, Peru, and Uruguay. Novel methodologies and results in dendrochemistry and wood anatomy were also presented by collaborating researchers from German institutions. This report describes some of the research within the subdisci...

En la actualidad el entorno globalizado y constantemente cambiante de los negocios ha llevado a las organizaciones a desarrollar sus servicios rápidamente para poder ser más competitivos en el mercado. Sin embargo, la necesidad de ir probando las diferentes funcionalidades de un servicio en marcha e ir testeando, para acabar ofreciendo una solución final, es considerada una tarea complicada y de muy alto costo. La literatura estudiada muestra que se han generado modelos de diseño de servicios con enfoque ágil, pero orientados a corporaciones ya establecidas o con diseños muy robustos que presuponen altos costos; a la fecha de desarrollo de esta investigación no se han encontrado modelos con una orientación hacia nuevos emprendimientos o startups de servicio. En el presente artículo se propone un modelo ágil para el diseño de servicios, el cual destaca principalmente la agilida...

The bipedicled Deep Inferior Epigastric Perforator (DIEP) flap, originally described and primarily utilized in autologous breast reconstruction for specific cases, has expanded its applications to encompass diverse anatomical regions in recent years. This report presents the case of a 69-year-old woman with a recurrent giant thyroid tumor who underwent surgical resection, resulting in a large cervico-thoracic defect effectively reconstructed using a bipedicled DIEP flap. The patient's postoperative recovery was uneventful, and the follow-up assessments revealed a healthy, well-perfused flap that provided sufficient coverage to critical structures, adequate restoration of the region contour, and enough volume to offset potential adverse effects of subsequent radiation therapy. In addition, this report incorporates a concise literature review highlighting the expanding indications of the b...

Almost half of the tributaries of the Amazon River originate in the tropical Andes and support large populations in mountain regions and downstream areas. However, it is difficult to assess hydroclimatic conditions or to evaluate future scenarios due to the scarcity of long, high-quality instrumental records. Data from the Global Precipitation Climatology Project (GPCP) provide a complete record since 1979 and offer a good representation of rainfall over the tropical Andes. Longer records are needed to improve our understanding of rainfall variability and summer monsoon behavior at various scales. We developed the first annually resolved precipitation reconstruction for the tropical Andes in Peru, based on tree-ring chronologies of Cedrela and Juglans species. The annual (November–October) reconstruction extends the short instrumental records back to 1817, explaining 68% of the total v...

Almost half of the tributaries of the Amazon River originate in the tropical Andes and support large populations in mountain regions and downstream areas. However, it is difficult to assess hydroclimatic conditions or to evaluate future scenarios due to the scarcity of long, high‐quality instrumental records. Data from the Global Precipitation Climatology Project (GPCP) provide a complete record since 1979 and offer a good representation of rainfall over the tropical Andes. Longer records are needed to improve our understanding of rainfall variability and summer monsoon behavior at various scales. We developed the first annually resolved precipitation reconstruction for the tropical Andes in Peru, based on tree‐ring chronologies of Cedrela and Juglans species. The annual (November–October) reconstruction extends the short instrumental records back to 1817, explaining 68% of the tot...