September 2000, Amsterdam - Projects - Lithuania

Ruta Brilingaite (18)
School: Vetrunges Grammar school
Hobbies: reading books, growing flowers
Career intention: microbiologist or chemist

Bacteriological analysis of water pollution
At present microbiological monitoring receives great interest, because micro-organisms are some of the most important components of the ecological system of the water reservoir and are indicators of its condition. I want to demonstrate the influence our town (Klaipeda) has on the microbiological pollution of the Baltic sea. My bacteriological research project consisted of determining the total number of bacteria (TBN), the saprophytic bacteria number (SBN) and the total coliform index and was carried out from 1998 to 2000. In the Baltic sea bacteriological pollution is determined by the water inflow from the Curonian lagoon, the Dane river and the Klaipeda strait. My research showed that the Dane river is characterised by the highest pollution level, and one of its causes lies in the release of waste products from industrial enterprises.

Paulius Ugincius (19)
School: Plunges "Saules" Gymnasium
Hobbies: biology, modelling of aeroplanes, drawing
Career intention: Zoologist

Protozoan in aquariums. Investigations of infusoria Vorticella convallaria
After determining that infusoria Vorticella convallaria is one of the most frequently occurring protozoan species in aquariums, I decided to investigate the reaction of this species to different physical and chemical irritations.
I started influencing the habitants of the aquarium with mechanical irritations by means of mechanic power impulse.
Secondly a constant electric current was applied to destroy infusoria and at last metal salt solutitions were used. In this way I was able to gain information on the bottom and top irratability points for these aquarium inhabitants .

Valdas Vansevicius (16)
School: Vilnius Gabija gymnasium
Hobbies: computer games, basketball, new age and rock music
Career intention: astronomer

Worlds suitable for colonisation in our galaxy
Now that extrasolar planets have been discovered, we actually wondered whether colonisation of other worlds would be possible. As the purpose of our project was to predict the number of planetary systems suitable for Earthlike forms in the Galaxy, we needed a better interpretation of the results obtained by the program PEGASE. This was done by modifying the Drake equation, which is used to obtain the values of astrophysical terms as the number of extrasolar planets suitable for human race colonisation, the average distance between these worlds and the density of planetary systems suitable for habitation. All these results, of which the reliability has been analysed, imply that there is a huge number of habitable worlds around the solar system !