Sökning: "Erik Eriksson"
Visar resultat 21 - 25 av 78 avhandlingar innehållade orden Erik Eriksson.
21. Low-Energy Ion Escape from the Terrestrial Polar Regions
Sammanfattning : The contemporary terrestrial atmosphere loses matter at a rate of around 100,000 tons per year. A major fraction of the net mass loss is constituted by ions, mainly H+ and O+, which escape from the Earth’s ionosphere in the polar regions. LÄS MER
22. Multiphase models for freeze-thaw actions and mass transport in concrete hydraulic structures
Sammanfattning : A crucial task for civil engineers is to make appropriate designs of new concrete structures and assessments of existing structures to ensure a long service life and sustainable use of the infrastructure. This doctoral thesis aims to increase the understanding of how advanced mathematical models can be used to describe phenomena and processes governing concrete degradation and thereby ultimately contribute to improving tools for design and assessments. LÄS MER
23. Numerical models for degradation of concrete in hydraulic structures due to long-term contact with water
Sammanfattning : The durability of concrete is of major concern in all types of concrete structures where the combined effect of exposure conditions and the type and quality of the concrete material usually determines the rate of degradation. Furthermore, there are synergy effects between different deterioration mechanisms, which means that the combined rate of degradation is higher than the sum of the individual rates of each mechanism. LÄS MER
24. Drug absorption in the lungs : studies in the isolated perfused rat lung model combined with physiologically based biopharmaceutics modelling
Sammanfattning : Pulmonary delivery of drugs is the preferred route of administration for treatment of local lung diseases like asthma and chronic obstructive pulmonary disease. Recently, there has also been increased interest in systemic delivery of drugs via the lungs to avoid problems with low and/or variable gastrointestinal absorption, and as a needle-free alternative for drugs that cannot be ingested. LÄS MER
25. Epigenetic changes and immunological features of chronic obstructive pulmonary disease
Sammanfattning : Background: Chronic obstructive pulmonary disease (COPD) is a heterogenous and chronic inflammatory syndrome with the lungs as its main target organ. Clinically, COPD is characterized by airflow limitation, chronic respiratory symptoms, and many extrapulmonary comorbidities. LÄS MER
