Sökning: "marine environments"

Visar resultat 6 - 10 av 142 avhandlingar innehållade orden marine environments.

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

   Författare :Anders Lindvall; Chalmers tekniska högskola; []
   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

3. 7. Distribution and activity of nitrogen-fixing bacteria in marine and estuarine waters

   Författare :Hanna Farnelid; Lasse Riemann; Jonathan Zehr; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 454-pyrosequencing; diazotrophs; heterotrophic bacteria; marine bacteria; marine microbial ecology; microbiology; nifH; nitrogenase; nitrogen fixation; PCR; qPCR; Mikrobiologi; Microbiology;

   Sammanfattning : In aquatic environments the availability of nitrogen (N) generally limits primary production. N2-fixing prokaryotes (diazotrophs) can convert N2 gas into ammonium and provide significant input of N into the oceans. Cyanobacteria are thought to be the main N2-fixers but diazotrophs also include a wide range of heterotrophic bacteria. LÄS MER

4. 8. Marine environmental governance and management in Sweden from the 1960s until today : Did the actions suit the needs?

   Författare :Kjell Grip; Sven Bolmqvist; Kjell Larsson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; International programmes on ocean and seas; Baltic Sea; Kattegat-Skagerrak; Marine spatial planning and management; Marine Ecology; marin ekologi;

   Sammanfattning : This thesis investigates how governance and management relevant to the use and protection of the marine environment has emerged in Sweden from the 1960s until today. Focus is on how the modern environmental and nature conservation administration in Sweden developed the legal and organizational frameworks needed for proper management. LÄS MER

5. 9. Inverse Modeling of Cloud – Aerosol Interactions

   Författare :Daniel Partridge; Johan Ström; Kari Lehtinen; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; stratocumulus; marine; cloud; aerosol; interactions; MCMC; inverse modeling; droplet closure; global sensitivity; Atmosphere and hydrosphere sciences; Atmosfärs- och hydrosfärsvetenskap; Applied Environmental Science; tillämpad miljövetenskap;

   Sammanfattning : The role of aerosols and clouds is one of the largest sources of uncertainty in understanding climate change. The primary scientific goal of this thesis is to improve the understanding of cloud-aerosol interactions by applying inverse modeling using Markov Chain Monte Carlo (MCMC) simulation. LÄS MER

7. 10. Effects of contaminant mixtures on marine zooplankton diversity and function

   Författare :Christina Jönander; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; zooplankton; copepods; ciliates; dinoflagellates; mixture toxicity; chemical mixtures; marine contaminants; biodiversity; reproduction; ULSFO; closed-loop scrubbers; exhaust gas cleaning systems;

   Sammanfattning : Chemicals have important roles in our society and can be used as ingredients in personal care products, pesticides, pharmaceuticals, as well as be components of fuels used in cars or ships. More than 350 000 chemicals and mixtures have been registered for use, which only covers a part of all the chemicals that we may come into contact with. LÄS MER