Sökning: "Archaea"

Visar resultat 21 - 25 av 64 avhandlingar innehållade ordet Archaea.

  1. 21. Microbial ecology in deep granitic groundwater - activity and impact of viruses

    Författare :Hallgerd Eydal; Göteborgs universitet; []
    Nyckelord :ATP; Desulfovibrio; groundwater; bacteriophage; Podoviridae; sulphate-reducing bacteria; viral ecology;

    Sammanfattning : The deep subsurface environments in granitic rock can be studied and sampled at the Äspö hard rock laboratory (HRL) close to Oskarshamn in Sweden. Here, the groundwater is anaerobic and total counts give numbers of 104 to 106 cells mL-1. However, these measurements do not reveal if the cells are active and alive. LÄS MER

  3. 22. Low temperature olivine alteration ; an experimental approach

    Författare :Anna Neubeck; Nils Holm; Gretchen Früh-Green; Stockholms universitet; []
    Nyckelord :Olivine alteration; hydrogen; methane; serpentinization; geokemi; Geochemistry;

    Sammanfattning : Water reacting with minerals to alter or dissolve them is a common phenomenon on Earth, leading to a unique chemical composition of the oceans and continents. The continuous circulation of elements and the chemical reactions between them creates the extraordinary environment prevailing on our Earth today and was probably an important requirement for the onset of life on our planet. LÄS MER

  4. 23. A world inside : Gastrointestinal microbiota in healthy Swedish children at day care centers and aspects on antibiotic resistance, enteric pathogens and transmission

    Författare :Johan Kaarme; Tryggve Nevéus; Björn Olsen; Jonas Ludvigsson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ESBL; VRE; enteropathogens; antibiotic resistance; children; preschool; Pediatrik; Pediatrics;

    Sammanfattning : Antibiotic resistance is a growing threat to human health and is defined by the World Health Organization as a crisis that must be managed with the utmost urgency. Antibiotic resistant bacteria increase both mortality and morbidity and have a great impact on the global economy. LÄS MER

  5. 24. Deg/HtrA proteases of the cyanobacterium Synechocystis sp. PCC 6803 : from biochemical characterization to their physiological functions

    Författare :Xuân Tâm Lâm; Christiane Funk; Jörg Nickelsen; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Deg; HtrA; protease; chaperone; Synechocystis sp. PCC 6903; biochemical characterization; physiological function; proteomics; structure;

    Sammanfattning : The family of Deg/HtrA proteases is present in a wide range of organisms from bacteria, archaea to eukaryota. These ATP-independent serine endopeptidases play key roles in the cellular protein quality control. The cyanobacterium Synechocystis sp. LÄS MER

  7. 25. Poly (3-hydroxybutyrate) from a moderate halophile: production and modification for new applications

    Författare :Marlene Munoz; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biopolymers; polyhydroxyalkanoates; polyhydroxybutyrate; moderate halophile; Halomonas boliviensis; fermentation; recovery; thermally induced phase separation; scaffolds; covalent modification; hydrophobic ion pairing; polyethylenemine; lysozyme.;

    Sammanfattning : Polyhydroxybutyrate (PHB) is a homopolymer belonging to the family of biopolyesters, polyhydroxyalkanoates (PHA) produced by different bacteria and archaea as intracellular granules often under conditions of metabolic stress due to a limited supply of essential nutrients. The properties of the PHAs are similar to those of polyethylene and polypropylene and can hence replace these fossil based polymers in a large variety of applications. LÄS MER