Melisa Diaz

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Cintia Quiliconi

FLACSO-Ecuador

Armando Marques-Guedes

UNL - New University of Lisbon

Frédérique Langue G.

Centre National de la Recherche Scientifique / French National Centre for Scientific Research

Sergio Caballero

Universidad de Deusto

Cuadernos de Literatura

Pontificia Universidad Javeriana

Catalina Quesada-Gómez

University of Miami

Camilo López Burian

Universidad de la República (Uruguay)

Roberto García Ferreira

Universidad de la República

Ronald Raminelli

UFF - Universidade Federal Fluminense

Antonio Alvarez-Ossorio Alvariño

Universidad Autónoma de Madrid

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Papers by Melisa Diaz

Resistance to heavy metals in algae isolated from an extreme acidic environment, Rio Tinto (SW, Spain)

Rio Tinto, a river located in south-western Spain, is characterized by its extreme physico-chemic... more Rio Tinto, a river located in south-western Spain, is characterized by its extreme physico-chemical conditions in terms of low pH (mean 2.2) and high concentrations of heavy metals. It contains an unexpected diversity of photosynthetic eukaryotes. We have isolated a strain of Chlamydomonas sp., an acidophilic species belonging to the phylum Chlorophyta. It has been cultured in BG11 media in the presence of copper, cobalt or zinc in order to evaluate the effects of these metals both on the photosynthesis and on the overall growth. When exposed to different doses of metals, considerable changes were observed in its growth as compared to metal-free controls. At the lowest concentrations tested, a small decrease in growth was observed. However, the algae still maintained morphology and green colour similar to the control. Metal concentrations were progressively increased reaching the lethal doses 50 (LD50). At these high concentrations, cells became colourless and some even lost their f...

Memoria pedagogica

El presente trabajo es una memoria pedagógica, la cual tiene como objetivo la sistematización de ... more El presente trabajo es una memoria pedagógica, la cual tiene como objetivo la sistematización de la experiencia escolar desplegada en la Práctica Docente, tanto como observador participante, como ayudante en la tarea pedagógica del proceso de enseñanza-aprendizaje, como la entrada misma al campo de la tarea docente, la residencia.

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