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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

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Spelling suggestions: "subject:"actividades enzimática antioxidante"" "subject:"actividades enzimáticos antioxidante""

1

Antioxidant enzyme activities in fluvial biofilms as biomakers of metal pollution

Bonet Sánchez, Berta 28 February 2013 (has links)
The present thesis aims to evaluate the use of antioxidant enzyme activities (AEA) of biofilm communities as biomarkers of metal pollution (mainly Zn) in fluvial ecosystems. In order to test AEA as biomarkers of metal pollution as well as their responses to environmental variables, several ecotoxicological experiments have been performed. A zoom from field studies (with high ecological realism) to microcosm experiments (under controlled conditions) has been done to fill the gap between both approaches and understand AEA responses under a multiple-stress (environmental and metallic) scenario. The field studies were carried out in the Riera d’Osor, a tributary of the Ter, located in the region of La Selva (Girona province) / L’objectiu d’aquesta tesi és avaluar l’ús de les activitats enzimàtiques antioxidants (AEA) dels biofilms com a biomarcadors de contaminació metàl·lica (principalment per zinc (Zn)) en els ecosistemes fluvials. Per tal d’estudiar la resposta de les AEA a la contaminació metàl•lica, així com també la resposta a altres canvis ambientals (situacions d’estrès múltiple), s’han realitzat diversos experiments ecotoxicològics fent un zoom des d’estudis de camp (amb un elevat realisme ecològic) fins a un estudi de laboratori utilitzant microcosmos (amb condicions controlades). Els estudis de camp s’han dut a terme a la riera d’Osor, afluent del Ter, situada a la comarca de la Selva (província de Girona)
Activitats enzimàtiques antioxidants
Actividades enzimáticas antioxidantes
Antioxidant enzyme activities
Estrès oxidatiu
Estrés oxidativo
Oxidative stress
Zinc
Cinc
Zn
Ecotoxicologia
Ecotoxicología
Ecotoxicology
Ecosistemes fluvials
Ecosistemas fluviales
Fluvial ecosystems
Contaminació per metalls
Contaminación por metales
Metal pollution
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