Avancerad sökning

Hittade 5 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Linking plant population dynamics to the local environment and forest succession

   Författare :Johan Petter Dahlgren; Johan Ehrlén; Ove Eriksson; Mark Rees; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Actaea spicata; Forest herbs; Forest succession; Integral projection model; Plant demography; Plant phenology; Population dynamics; Pre-dispersal seed predation; Seed mass; Soil potassium; Specific leaf area; Terrestrial ecology; Terrestisk ekologi; Plant Ecology; växtekologi;

   Sammanfattning : Linking environmental variation to population dynamics is necessary to understand and predict how the environment influences species abundances and distributions. I used demographic, environmental and trait data of forest herbs to study effects of spatial variation in environmental factors on populations as well as environmental change in terms of effects of forest succession on field layer plants. LÄS MER

3. 2. Scattering of Elastic Waves from Inhomogeneities in Solids - Application to Ultrasonic NDT

   Författare :Tomas Grahn; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The subject of this thesis is scattering of elastic waves from inhomogeneities in solids, with applications to ultrasonic nondestructive testing (NDT). The major part of the work concerns cracks in anisotropic solids, but the interaction of Lamb waves with circular holes in plates is considered as well. LÄS MER

4. 3. The Bergman Kernel on Toric Kähler Manifolds

   Författare :Florian T. Pokorny; Michael Singer; Toby Bailey; The University of Edinburgh School of Mathematics; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Let $(L,h)\to (X, \omega)$ be a compact toric polarized Kähler manifold of complex dimension $n$. For each $k\in N$, the fibre-wise Hermitian metric $h^k$ on $L^k$ induces a natural inner product on the vector space $C^{\infty}(X, L^k)$ of smooth global sections of $L^k$ by integration with respect to the volume form $\frac{\omega^n}{n!}$. LÄS MER

5. 4. Porins of Borrelia burgdorferi

   Författare :Marija Pinne; Sven Bergström; Magnus Höök; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Lyme disease; P13; paralog; P66; channel-forming activity; porin; Medical microbiology; Medicinsk mikrobiologi;

   Sammanfattning : Borrelia burgdorferi is a pathogenic spirochete which cycles between its arthropod vector and vertebrate host. If transmitted to humans, B. burgdorferi causes Lyme disease, an infection which can impair different organs, such as the skin, joints, nervous system and heart. LÄS MER

7. 5. Characterization of human glutathione-dependent microsomal prostaglandin E synthase-1

   Författare :Staffan Thorén; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Prostaglandins (PGs) are lipid mediators, which act as local hormones. PGs are formed in most calls and are synthesized de novo from membrane-released arachidonic acid (AA) upon cell activation. LÄS MER