thesis in environmental science

MSc in Environmental Science

• Environmental Science
• Programme Structure

Examples of MSc theses

In the list below you can read the descriptions of 11 very different theses, authored by students at the MSc Programme in Environmental Science. You are welcome to contact the author if you have further questions regarding a specific thesis.

Chronic toxicity of silver nanoparticles to Daphnia magna under different feeding conditions

Author : Aiga Mackevica

Supervisor : Anders Baun, DTU Environment.

Ecotoxicity of nanoparticles has been an emerging issue in recent years, which is why it is necessary to evaluate the effects of nanoparticle exposure to the aquatic environment. In this study, we performed series of 21-day chronic tests with Daphnia magna exposed to silver nanoparticles to obtain information on growth and reproductive effects. The results were used for modelling to find possible modes of action of silver nanoparticle toxicity.

Determination of Steroid Hormones in Polar Bear Hair (Ursus maritimus) - a Methodology Study

Author: Johan Weisser

Supervisors: Bjarne Styrishave, Erland Björklund & Martin Hansen; Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen.

The aim of this thesis was to develop an analytical methodology to determine steroid hormones in hair, for the purpose of using hair as a biomarker to study endocrine imbalance in polar bears ( Ursus maritimus ). Hair was chosen because steroids are incorporated into the hair shaft while growing and thereby gives a prolonged steroid profile which reflect blood steroid concentration in that given time period. An extraction and clean up method was developed. For analyte determination both gas chromatography (GC) and liquid chromatography (LC) was tested followed by tandem mass spectrometry (MS/MS). It was possible to detect progestagens, androgens and estrogens using GC-MS/MS whereas LC-MS/MS is a better analytical technic for detecting corticosteroids. Hair steroid profiling may be used to assess stress in polar bears in response to pollution and climate changes.

Effects of Carbon Nanotubes on the Female Reproductive Axis: Interference with the female reproductive cycle. A Study in Mice.

Author: Hanna Lilith Katarina Johansson

Supervisor: Karin Sørig Hougaard; National Research Centre for the Working Environment & University of Copenhagen

Very little is known on the effects of nanoparticles on reproductive function. Inhalation of nanoparticles induces inflammation in the lung – and inflammation interferes with the female reproductive axis. In this study, we investigated the effect of airway exposure to multi walled CNTs (MWCNTs) on the estrous cycle of female mice. The results showed that female reproduction may be susceptible to acute exposure to nanoparticles.

Fluorochemicals and antiandrogenic effects – an in vitro study of per- and polyfluorinated chemicals on steroidogenesis and androgen receptor activation

Influence of rice cultivation on water quality and the benthic macro-invertebrate community in the Mata Redonda lagoon in Guanacaste,  Costa Rica