Celia Tognetti

• National University of Río Negro

Introduction Hantavirus infection is a zoonotic disease from rodents to humans, necessitating seroprevalence assessment for disease burden clarification and control measure implementation. This study aimed to estimate global hantaviruses seroprevalence, examining variations by regions, populations or settings. Methods A comprehensive database sear...

En este trabajo, el objetivo general fue establecer la percepción de los aspirantes a la carrera de Medicina de la Universidad Nacional de Río Negro, Sede Andina, ubicada en la ciudad de San Carlos de Bariloche, Río Negro, Patagonia Argentina, acerca de determinadas prácticas docentes llevadas a cabo por los profesores universitarios responsables d...

El proceso de admisión de estudiantes a carreras de grado en general y a carreras de medicina en particular en Argentina presenta diferencias, si bien la mayoría enfocan su selección valorando únicamente variables cognitivas académicas a través de exámenes de conocimiento. El objetivo de este trabajo fue describir la implementación, la confiabilida...

Xanthophyllomyces dendrorhous (Phaffia rhodozyma) yeasts are biotechnologically exploited as a natural source of astaxanthin for aquaculture. Based on results of recent studies, it has become clear that this species possesses a greater genetic variability generating the necessity to uncover it and assess its potential for the astaxanthin industry....

Composts and vermicomposts from a municipal composting plant in northwestern Patagonia, both having undergone a thermophilic phase, (with the vermicompost being inoculated with earthworms after the thermophilic stage) and a nonthermophilic backyard vermicompost were studied. Their effects on soil biological and biochemical properties and plant grow...

Astaxanthin is a xanthophyll pigment of high economic value for its use as a feeding component in aquaculture. Xanthophyllomyces dendrorhous is a basidiomycetous fungi able to synthesize astaxanthin as its major carotenoid, and the only known yeast species bearing the capability to produce this type of carotenoid. Recently, the habitat and intraspe...

La comunidad rural Ñirihuau (Dina Huapi, RN) se ubica en la margen derecha del río Ñirihuau, en un paisaje ecotonal de estepa-bosque y tiene potencial para actividades recreativas y turísticas. Está conformada por unas cuarenta familias que desarrollan actividades productivas de subsistencia. Se propuso incrementar la relación de la comunidad con l...

The occurrence and distribution of Xanthophyllomyces dendrorhous associated with Cyttaria hariotii parasitizing three Nothofagus species (N. dombeyi, N. antarctica and N. pumilio) in northwestern Patagonia (Argentina), as well as the factors that may affect this distribution were herein studied. Between 2000 and 2007, samples were obtained from 18...

In the first part of this work, the effect of municipal organic waste (MOW) composts on plant growth was evaluated in a greenhouse trial. The treatments included soil amended with 14 different composts (prepared by shredding, adding wood shavings, cocomposting with biosolids or vermicomposting), an inorganically fertilized soil, and a control soil....

El presente trabajo describe el Taller “Introducción a la investigación en Ciencias Naturales” dictado como una actividad optativa en el marco del Ingreso del año 2010 del Centro Regional Universitario Bariloche (Universidad Nacional del Comahue) para los alumnos de las carreras de Licenciatura y Profesorado en Ciencias Biológicas, Técnico Universi...

Fires are the most devastating anthropogenic disturbances in forests of the A ndean-Patagonian region. They severely affect surface soil physical and chemical characteristics, as well as vegetation and fauna, thus inc reasing the risk of erosion. These forests are very import ant for the conservation of biodiversity, climate and watershed regulatio...

Se describe el trabajo práctico de respiración celular utilizado en la materia Biología General, de primer año de las Carreras de Profesorado y Licenciatura en Ciencias Biológicas del Centro Regional Universitario Bariloche de la Universidad Nacional del Comahue. En este trabajo práctico los alumnos formulan una pregunta relacionada con la activida...

Se describe el trabajo práctico de respiración celular utilizado en la materia Biología General, de primer año de las Carreras de Profesorado y Licenciatura en Ciencias Biológicas del Centro Regional Universitario Bariloche de la Universidad Nacional del Comahue. En este trabajo práctico los alumnos formulan una pregunta relacionada con la activida...

We studied the degradability and nutrient release capacity of municipal organic waste (MOW) composts obtained with different management practices: shredding and/or mixing with wood shavings, cocomposting with biosolids, and vermicomposting. As indicators of degradability and nutrient release capacity, we measured net N and C mineralization, extract...

The effects of different municipal organic waste (MOW) management practices (shredding, addition of carbon-rich materials and inoculation with earthworms) on organic matter stabilization and compost quality were studied. Four static piles were prepared with: (i) shredded MOW; (ii) shredded MOW+woodshavings; (iii) non-shredded MOW; and (iv) non-shre...

The quality of compost made from the organic fraction of municipal organic waste (MOW), in terms of organic matter and nutrient concentrations, is inferior to that of compost from other feedstocks. The aim of this work was to improve the quality of MOW compost by means of cocomposting with biosolids (at ratios of 1:1, 2:1, and 3:1 MOW/biosolids) an...