Search for dissertations about: "algal"

Showing result 1 - 5 of 132 swedish dissertations containing the word algal.

  2. 1. Red algal starch metabolism : effects of endosymbionts and nutrient status on starch metabolising enzymes

    Author : Pi Nyvall; Mark Ragan; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; växtfysiologi; Plant Physiology;

    Abstract : Many different organisms occur as endosymbionts of red algae and while some are highly pathogenic others have little effect on the host. An endosymbiotic fungus, found in our culture of Gracilariopsis sp., was characterised and identified as a Chytridiomycete. It was named Thalassochytrium gracilariopsidis and probably belongs to a new order. READ MORE

  4. 2. On Toxicant-Induced Succession in Periphyton Communities: Effects of Single Chemicals and Chemical Mixtures

    Author : Tobias Porsbring; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; community ecotoxicology; toxicant-induced succession; chemical mixtures; concentration addition; independent action; diatoms; periphyton; algal pigments; algal sterols;

    Abstract : This thesis deals with the effects of single chemicals and chemical mixtures on biological communities. Ecosystems are exposed to complex mixtures of chemicals, and because combination effects can occ... READ MORE

  5. 3. Algal-Bacterial Photobioreactors for the Degradation of Toxic Organic Pollutants

    Author : Raul Munoz; Bioteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bioteknik; Biotechnology; symbiosis.; nutrient removal; heavy metals removal; Algal-bacterial systems photobioreactors; toxic organic pollutants;

    Abstract : The aerobic biodegradation of toxic organic volatile contaminants is always limited by the low aqueous solubility of O2. Therefore, intensive bubbling or surface aeration is required to supply the bacterial community with sufficient O2 to carry out pollutant mineralization. This can cause the hazardous volatilization of toxic volatile contaminants. READ MORE

  6. 4. Polymer extraction and utilization of brown algal biomass

    Author : Martin Sterner; Ulrica Edlund; Fredrik Gröndahl; Marguerite Rinaudo; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Algae; Saccharina latissima; alginate; brown seaweed; extraction; filament; chelation; gel; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Abstract : Aquaculture is a field with a world changing potential. The areas at sea are enormous and aquatic cultivations impact both the environment and local ecology far less than land based cultivations. In the realm of algae, abundancies exists of nutrition, water and accessible sunlight, but there is constant shortage of places to dwell. READ MORE

  7. 5. Studies on the taxonomy of acid resistant algal microfossils

    Author : Svenolov Lindgren; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This dissertation is the summary of the collection of seven previously published articles on the taxonomy of acid resistant algal microfossils, viz. (A) forms referable to Tetraporina, (B) leiospheres, and (C) peridinioid dinoflagellates. The material studied is mainly from Upper Cretaceous deposits in southern Sweden. READ MORE