FRACTAL ANALYSIS ON CHEMICAL DEGRADATION OF NATURAL RESINS PROTECTOR FILM
This is a study on the fractal analysis regarding the chemical degradation of three types of protector films in air polluted with SO2. Fractal analysis is a method used to study surfaces properties of protector film. The films composed of natural resins (shellac, colophony and dammar) and ethanol are exposed on atmosphere with SO2.
When the creation of a new safety reservoir for the drinking water supply of the Antwerp region was envisaged it was decided that a number of actions would be undertaken to create a favourable environment for bioregulation (biomanipulation). These were: the use of boulders for the side-walls instead of concrete or bitumen, first flooding with a shallow layer of water to leach out the minerals contained in the upper clay layer of the bottom floor, introduction of freshwater mussels and of a number of fish species (bitterlings, predators such as eels, pike-perch and pike) and of submerged, floating-leaved and emergent aquatic plant species. This paper is a report on the results of these bioregulation measures obtained so far.