Browsing by Author "Vergara, A."
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- ItemBioremoval of copper by filamentous fungi isolated from contaminated soils of Puchuncavi-Ventanas Central Chile(2023) Carvajal, M.; Jeldres, P.; Vergara, A.; Lobaina, E.; Olivares, M.; Meza, D.; Velasquez, A.; Dorta, F.; Jorquera, F.; Seeger, M.; Cereceda-Balic, F.; Fadic, X.Pollution represents a high risk to plants, animals, and human beings, causing an imbalance and affecting the environment. Soil is considered a universal sink, containing the highest load of environmental pollution. Puchuncavi-Ventanas sector, decreed as a saturated contamination zone in 1993, is considered one of the most affected areas by industrial pollution and belongs to one of the 5 sacrifice zones of Chile. The localities of Puchuncavi and Ventanas have heavy metal pollution levels that exceed up to 99% of the limits allowed by Canadian standards. The objective of this study was to characterize heavy metal tolerance and removal potential of filamentous fungi isolated from polluted soils for their use in decontamination systems and in situ soil improvement. Six fungal strains were selected based on their tolerance and a high capability to accumulate heavy metals, achieving copper bioaccumulation of 84% (Mortierella sp. strain LG01), 49% (Clonostachys sp. strain CQ23) and 48-77.5% (Trichoderma sp. strain LM01A). Trichoderma sp. strain LM01A was able to remove 41% of copper from contaminated soil under ex situ conditions. Some fungal strains belong to beneficial fungal genera, which are used as bioproducts in agriculture. The results of this study highlighted the use of Trichoderma sp. in soils contaminated, which may be of special interest in agriculture due to the large amounts of copper sulfate still applied as a pesticide in Chile and the world.
- ItemForos virtuales y construcción de conocimiento en profesionales de la salud. Virtual forums and knowledge building among health professionals. Foros virtuais e construção de conhecimento em profissionais da saúde(2017) Carrasco Aldunate, Paola; Carrillo, M. J.; Bazley, K.; Vergara, A.; Contreras, A.
- ItemInnovación curricular en la educación superior : ¿Cómo se gestionan las políticas de innovación en los (re)diseños de las carreras de pregrado en Chile?(2015) Guzmán Droguett, María Angélica; Maureira, Oscar; Sanchez, A.; Vergara, A.
- ItemLatin america's problems of success(2016) Luna, Juan Pablo; Vergara, A.
- ItemManagement of rectal cancer during pregnancy(2011) Vergara, A.; Nariño, O.; Carvajal, S.; Carvajal C., Jorge A.Rectal cancer has low incidence in the pregnant women. Its diagnosis during pregnancy is usually delayed, since cancer symptoms are quite similar to normal symptoms of gestation. Delayed diagnosis confers worse prognosis, although pregnancy itself does not affect natural evolution of the disease. The perinatal outcome is not affected by the neoplasia, even in cases with multiple metastases, but may be affected by the treatment. The treatment of rectal cancer will depend of the stage of the neoplasia and gestational age. We review published data regarding rectal cancer associated with pregnancy and propose a management protocol.
- ItemPKD2/polycystin-2 induces autophagy by forming a complex with BECN1(2020) Peña Oyarzun, D.; Rodríguez Peña, M.; Burgos Bravo, F.; Vergara, A.; Kretschmar, C.; Sotomayor Flores, C.; Ramirez Sarmiento, Cesar Antonio; De Smedt, H.; Reyes, M.; Perez, W.; Torres, V. A.; Morselli, Eugenia; Altamirano, F.; Wilson, C. A. M.; Hill, J. A.; Lavandero, S.; Criollo, A.
- ItemThe possible and the impossible: Reflections on evidence in chilean ufology(2020) Espirito Santo, Diana; Vergara, A.