Sökning: "M Borg"
Visar resultat 1 - 5 av 22 avhandlingar innehållade orden M Borg.
1. Bacteria and geochemistry in a former uranium open pit mine - mobilization of trace metals
Sammanfattning : In mining areas around the world, chemical and biotic processes have lead to the release of toxic substances, e.g. metals. Microbial processes influence metal speciation, while the chemical environment shapes and controls microbial populations. LÄS MER
2. Toxicity of Inorganic Aluminium in Humic Streams
Sammanfattning : Aluminium (Al) has been recognised as a main toxic factor alongside pH in acidified water ecosystems. The toxic effect of Al has been attributed to inorganic Al (Ali), though there are few in situ studies in ambient humic waters which are the focus of this thesis. LÄS MER
3. Stereoselective syntheses of semichemicals : Applications in ecological chemistry
Sammanfattning : This thesis describes the syntheses of semiochemicals and their applications in the development of control methods for pest insects. The compounds synthesized are divided into three groups: 1) Lepidoptera pheromones; 2) methyl substituted chiral pheromones and 3) aphid pheromones. LÄS MER
4. Metal fate and sensitivity in the aquatic tropical vegetable Ipomoea aquatica
Sammanfattning : The aquatic plant Ipomoea aquatica is a popular vegetable in Southeast Asia, often cultivated in nutrient rich and polluted waters. The overall aim of this thesis was to estimate potential risks for human health and reduced plant growth due to accumulation and toxicity of total-Hg, methyl-Hg, Cd and Pb. LÄS MER
5. Sensing the environment : development of monitoring aids for persons with profound deafness or deafblindness
Sammanfattning : Earlier studies of persons with deafness (D) and/or deafblindness (DB) have primarily focused on the mobility and communication problems. The purpose of the present study was to develop technology for monitoring aids to improve the ability of persons with D and/or DB to detect, identify, and perceive direction of events that produce sounds in their surroundings. LÄS MER