The antibacterial activity against Staphylococcus aureus of aerogels fabricated from colloidal suspensions of chitosan/chondroitin sulfate nanocomplexes is analyzed. Upon freeze-drying the colloidal suspensions, the aerogels presented a porous structure made of microsheets and microfibers. The aerogels could, in addition, be loaded with antimicrobial agents. Loaded with the antibiotic erythromycin, the aerogels showed crystalline deposits, affecting the topography Leer más2018 – Antibacterial activity against Staphylococcus aureus of chitosan/chondroitin sulfate nanocomplex aerogels alone and enriched with erythromycin and elephant garlic (Allium ampeloprasum L. var. ampeloprasum) extract[…]

Here, we highlight the potential of aromatic charged polymer/dye complexes as candidates to integer new functional formulations and materials with specific characteristics given by complexation through aromatic-aromatic interactions. Highly porous sponges made of alginate as main structural component and containing poly(sodium 4-styrenesulfonate)/methylene blue complexes have been synthesized by freeze-drying aqueous mixtures of the three components. The aromatic polyelectrolyte allowed controlling the Leer más2017 – Photodynamic action of methylene blue subjected to aromatic-aromatic interactions with poly(sodium 4-styrenesulfonate) in solution and supported in solid, highly porous alginate sponges[…]

Introducción: La epidemiología de la candidemia en Chile es poco conocida, a pesar de ser una enfermedad frecuente y grave. Objetivos: Analizar la incidencia y perfil de susceptibilidad in vitro de especies del género Candida causantes de candidemia en el Hospital Base Valdivia. Material y Métodos: Se identificó todos los casos de candidemia ocurridos en la institución entre Leer más2017 – Epidemiología y susceptibilidad antifúngica de especies causantes de candidemia en la ciudad de Valdivia, Chile.[…]

An efficient synthesis of a series of 4?-oxyalkyl-isocordoin analogues (2–8) is reported for the first time. Their structures were confirmed by 1H-NMR, 13C-NMR, and HRMS. Their anti-oomycete activity was evaluated by mycelium and spores inhibition assay against two selected pathogenic oomycetes strains: Saprolegnia parasitica and Saprolegnia australis. The entire series of isocordoin derivatives (except compound 7) showed high inhibitory activity against Leer más2017 – Hemi-Synthesis and Anti-Oomycete Activity of Analogues of Isocordoin[…]

The endemic Chilean edible plant Gunnera tinctoria (Nalca) is highly appreciated in the south of Chile by the small farmers. Nevertheless, no background exists about his secondary metabolites. In the present study, in the leaf from G. tinctoria was investigated the content of bioactive compounds like coumaric acid, ascorbic acid and total phenols; the antioxidant Leer más2017 – Biological and antioxidant activity of Gunnera tinctoria (Nalca)[…]

Introducción: Las tinciones cromógenas o «Black Stain» (BS) se han asociado a una baja experiencia de caries y un menor recuento de bacterias cariogénicas. El objetivo es determinar si existe diferencia en el número de pacientes que presenten un alto recuento de S. mutans (>105 UFC/ml saliva) entre niños con BS y sin ellas.  Material y métodos: Estudio observacional analítico Leer más2017 – Recuento en saliva de Streptococcus mutans en niños de 6 a 12 años con y sin tinciones cromógenas[…]

Embothrium coccineum J.R. Forst. & G. Forst is an evergreen tree that has been used as a folk remedy for the treatment of neuralgia, tooth pains, wound healing, and glandular conditions, as well as an antiseptic agent against bacterial infection. The antibacterial activities of sequential extracts (hexane, dichloromethane, ethyl acetate, and ethanol) from the leaves of E. Leer más2016 – In Vitro Antimicrobial Activity of Embothrium coccineum Used as Traditional Medicine in Patagonia against Multiresistant Bacteria[…]

Se evaluó la infección por virus parainfluenza (VPI) en pacientes con infecciones leves y graves mediante RPC en tiempo real. Se analizó un total de 1.067 muestras: 233 provenían de pacientes ambulatorios adultos receptores de trasplantes renales, 129 de niños con cardiopatía congénita, 381 de pacientes receptores de trasplantes de precursores hematopoyéticos adultos y 324 Leer más2016 – Detección de virus parainfluenza en pacientes inmunocomprometidos e inmunocompetentes atendidos en un hospital terciario de la Ciudad de São Paulo, Brasil[…]