Sökning: "marine environments"

Visar resultat 1 - 5 av 120 avhandlingar innehållade orden marine environments.

  1. 1. Experimental, petrological and geochemical investigations of ikaite (CaCO3·6H2O) formation in marine environments

    Författare :Elin Tollefsen; Alasdair Skelton; Carl-Magnus Mörth; Erik Sturkell; Andrew Putnis; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; ikaite; petrology; experiment; geochemistry; marine environments; pseudomorphs; calcium carbonate; Ikka Fjord; glendonite; nepheline; siderite; paleotemperature; carbonatite; Geology; geologi;

    Sammanfattning : Carbonates are a group of minerals that play an essential role in several processes on planet Earth, for example in the global carbon cycle and as a product of biomineralisation. Calcite (CaCO3) is by far the most common mineral in the carbonate group, and the stable form of carbonate at Earth surface conditions. LÄS MER

  2. 2. Between roving and stewarding marine environments : Practices and development of Swedish coastal fisheries in the Baltic Sea

    Författare :Emma Björkvik; Wijnand Boonstra; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Stewardship; fishing practices; sustainable development; coastal fisheries; Baltic Sea; fishers’ behavior; vetenskap om hållbar utveckling; Sustainability Science;

    Sammanfattning : Whether and how capture fisheries can increase catches and be sustainable at the same time i sa pertinent question for fisheries in the Global North. To ensure sustainable development of these fisheries, it is essential for fisheries management to pay attention to fishers’ behavior. LÄS MER

  3. 3. Corrosion-induced release of zinc and copper in marine environments

    Författare :Jan Sandberg; Inger Odnevall Wallinder; Dan Persason; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; copper; zinc; marine environment; runoff rate; atmospheric corrosion; chloride deposition; anti-fouling paints; chemical speciation; bioavailability; cupric ions; Other materials science; Övrig teknisk materialvetenskap;

    Sammanfattning : This licentiate study was initiated by copper, zinc and galvanized steel producers in Europe, who felt a need to assess runoff rates of copper and zinc from the pure metals and commercial products at marine exposure conditions. Their motive was the increasing concern in various European countries and the on-going risk assessments of copper and zinc within the European commission. LÄS MER

  4. 4. Element transport in marine coastal ecosystems – modelling general and element-specific mechanisms

    Författare :Lena Konovalenko; Clare Bradshaw; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Modelling; bioaccumulation; concentration ratio; radionuclides; marine foodweb.; marin ekologi; Marine Ecology;

    Sammanfattning : Understanding the behaviour of naturally-occurring and anthropogenically-derived radionuclides (isotopes) in the marine environment is important, because there is a need for their effective utilization either as in situ tracers or for industry, medical applications, the planning of waste-disposal facilities, and estimations of human and animal health risks. Radionuclides generally have the same chemical properties as their stable element analogues and thus show similar environmental behaviour and cycling to their stable counterparts. LÄS MER

  5. 5. Environmental Actions and Response - Reinforced Concrete Structures exposed in Road and Marine Environments

    Författare :Anders Lindvall; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; reinforcement corrosion; marine environment; frost action; bridges; concrete; chloride; de-icing salt; environmental actions; road environment; moisture conditions;

    Sammanfattning : The expenses for repair, maintenance and remediation of existing concrete structures have significantly increased. A large proportion of these expenses are due to problems related to a lacking durability of the structure. LÄS MER