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Adaptación fonológica de préstamos léxicos del español en el noruego
(2021-10-21) Krohn, Haakon Stensrud
En este artículo se lleva a cabo un análisis de la adaptación fonológica de 76 préstamos léxicos del español en el noruego. Las adaptaciones se interpretan de acuerdo con la descripción generativa del sistema fonológico noruego de Kristoffersen (2000). A nivel segmental, se observa una fuerte influencia de la ortografía, lo cual indica que este factor no debe subestimarse en estudios de la misma índole. Sin embargo, también hay ciertas adaptaciones de fonemas que solo pueden ser explicadas por influencia fonológica o fonética del español. A nivel suprasegmental, se mantiene la posición del acento léxico del español en la mayoría de los préstamos, y casi todos son asignados el tonema 1, que se manifiesta como el no marcado.
Bocconia frutescens little leaf, a new plant disease associated to a ´Candidatus Phytoplasma pruni´ related strain in Costa Rica
(2024-06-20) Villalobos Muller, William; Garita Salazar, Laura; Conejo Barboza, Ana María; Sandoval Carvajal, Izayana; Montero Astúa, Mauricio; Moreira Carmona, Lisela
Objective/Background. Bocconia frutescens (Papaveraceae) is a small tree distributed naturally from Mexico to Argentina and the Caribbean Bassin. Bocconia trees showing symptoms resembling phytoplasmas infection, such as little leaves and witches´-broom, were found in Cartago province, Costa Rica. Detection and identification of the potential phytoplasmas associated with B. frutescens little leaf symptoms was the objective out of this study. Materials and Methods. Evaluation of leaves tissue using transmission electron microscopy (TEM), nested PCR using universal and specific primers to amplify phytoplasmas 16S rRNA and secA genes. Nucleotidic sequences (Sanger method) were obtained from amplicons, and used for BLASTn, phylogenetic analyses, and in silico RFLP’s. Results. Presence of phytoplasmas into phloem tissue, only in symptomatic trees, was evidenced by TEM. Comparison of partial sequences (16Sr and secA genes) by BLASTn, in silico RFLP´s and phylogenetic analyses, showed the occurrence of a ´Candidatus Phytoplasma pruni´ related strain in the samples evaluated. Conclusion. Phytoplasmas were found only in the symptomatic B. frutescens trees evaluated. The phytoplasmas were identified as a ´Ca. Phytoplasma pruni´ related strain. This is the first report of B. frutescens as a natural host of ´Ca. Phytoplasma pruni´.
La expresión artística de la escritura y el movimiento dancístico como espacio de encuentro intergeneracional entre la niñez, la adolescencia y la adultez mayor en el cantón central de San Ramón
(2025) Herrera González, Damián
En el siguiente video se resaltan los principales hallazgos del proyecto de investigación "La expresión artística de la escritura y el movimiento dancístico como espacio de encuentro intergeneracional entre la niñez, la adolescencia y la adultez mayor en el cantón central de San Ramón"
Paisajes hortícolas de altura de la Cordillera Volcánica Central de Costa Rica. Procesos, dinámicas y oportunidades de mejora
(2025) León Alfaro, Yazmín
En el siguiente video se resaltan los principales hallazgos del proyecto de investigación "Paisajes hortícolas de altura de la Cordillera Volcánica Central de Costa Rica. Procesos, dinámicas y oportunidades de mejora"
Unveiling oral anaerobic bacteria outer membrane vesicles: A comprehensive systematic review
(2024-04-26) Castro Vargas, Priscilla; Barloy Hubler, Frédérique; Acuña Amador, Luis Alberto
Extracellular vesicles (EV) are spherical structures limited by membranes and shed by several cell types. Specifically, outer membrane vesicles (OMVs) are nanometric particles constitutively produced by Gram-negative bacteria (GNB) under different environmental conditions. OMVs are biologically active; they are loaded with selected lipids, polysaccharides, proteins, and even different types of nucleic acids. OMVs from pathogenic oral bacteria play key roles in pathogen-host interactions, constituting a possible link between oral health and systemic disease. OMVs participate in adhesion, invasion, and damage to cells, as well as in modulating the host's immune response, biofilm formation, and promotion of virulence. The objective of this systematic review was to collect, analyze and synthesize the knowledge available on literature reviews on OMVs of the most studied pathogenic oral anaerobic GNB. This information was classified into the following categories: induction of vesiculation and biogenesis, its liberation from the parental cell, content, internalization by another host cell, and the interaction with the host cell. It was found that the most studied OMVs are those of Porphyromonas gingivalis and Bacteroides spp. and, to a lesser extent, Aggregatibacter spp., and Treponema spp. This systematic review provides a synthesis of the current knowledge regarding OMVs, with emphasis on the information available for periodontopathogens.