Sökning: "filamentous microorganisms"

Visar resultat 1 - 5 av 14 avhandlingar innehållade orden filamentous microorganisms.

  1. 1. Properties of Activated Sludge Flocs

    Författare :Britt-Marie Wilen; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; floc strength; aerobic microbial activity; reflocculation; dissolved oxygen concentration; settling; deflocculation; filamentous microorganisms; shear forces; floc size; activated sludge;

    Sammanfattning : The quality of the effluent from activated sludge treatment plants is highly dependent on the efficiency of the solid-liquid separation process. The aim of this thesis was to study (i) the effects of dissolved oxygen (DO) concentration on effluent turbidity and flocculation, as well as on the settling properties of activated sludge, for both short term and long term scales, and (ii) the influence of aerobic microbial activity on the stability of activated sludge flocs. LÄS MER

  3. 2. Cambro-Ordovician microorganisms: acritarchs and endoliths

    Författare :Martin Stockfors; Malgorzata Vidal-Moczydlowska; John S. Peel; Kenneth John Dorning; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Cambrian; Ordovician; acritarch; endolith; Kolguev Island; North Greenland; Stratigraphy; Geovetenskap; Earth sciences; Geovetenskap;

    Sammanfattning : Organic-walled microfossils are abundant and taxonomically diverse in Cambrian-Ordovician strata; some are important for biostratigraphy and for the correlation of geological successions. New assemblages of Cambrian-Ordovician acritarchs from Kolguev Island, Arctic Russia and Middle Cambrian ichnofossils of endoliths from Peary Land, North Greenland are studied. LÄS MER

  4. 3. Harnessing the potential of filamentous fungi for sustainable and healthy food system

    Författare :Neda Rousta; Mohammad J Taherzadeh; Duu-Jong Lee; Högskolan i Borås; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sustainable food system; mycoprotein; bioactive compounds; L-carnitine; submerged fermentation; healthy food; edible filamentous fungi; Resource Recovery; Resursåtervinning;

    Sammanfattning : Food systems have the potential to improve human health while contributing to environmental sustainability; however, they are currently endangering both. The current food system, which is often based on animal farming, is responsible for global greenhouse gas emissions, and increases the incidence of, and mortality from, non-communicable diseases. LÄS MER

  5. 4. Cyanobacterial Hydrogen Metabolism : Transcriptional Regulation of the Hydrogenases in Filamentous Strains

    Författare :Rikard Axelsson; Peter Lindblad; Tomás Ruiz-Argüeso; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular biology; Molekylärbiologi; Molecular biology; Molekylärbiologi;

    Sammanfattning : Cyanobacteria are a heterogeneous group of phototrophic microorganisms. Many cyanobacteria have the capacity to fix atmospheric nitrogen. During the process of nitrogen fixation, molecular hydrogen is produced. Three enzymes are directly involved in hydrogen metabolism in cyanobacteria. LÄS MER

  7. 5. Analysis of Secondary Metabolites from Aspergillus fumigatus and Penicillium nalgiovense : Antimicrobial Compounds from Filamentous Fungi Isolated from Extreme Environments

    Författare :Stefan Svahn; Lars Bohlin; Björn Olsen; Ulf Göransson; Erja Chryssanthou; Douglas Kinghorn; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Aspergillus fumigatus; Penicillium nalgiovense; secondary metabolites; invasive aspergillosis; elicitation; gliotoxin; bis methyl gliotoxin; amphotericin B; Pharmacognosy; Farmakognosi;

    Sammanfattning : This thesis describes the cultivation and extraction of filamentous fungi isolated from extreme environments in the search for new antibiotic compounds. Filamentous fungi are a rich source of medicines including antibiotics, and it is believed that many currently unknown fungal species and bioactive fungal metabolites remain to be discovered. LÄS MER