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Visar resultat 1 - 5 av 6 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Marine Seaweed Invasions : the Ecology of Introduced Fucus evanescens

   Författare :Sofia A. Wikström; Lena Kautsky; Ove Eriksson; Paul Lavery; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biological invasions; marine; seaweed; algae; herbivory; enemy release hypothesis; phlorotannins; anti-fouling; Fucus evanescens; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

   Sammanfattning : Biological invasions are an important issue of global change and an increased understanding of invasion processes is of crucial importance for both conservation managers and international trade. In this thesis, I have studied the invasion of the brown seaweed Fucus evanescens, to investigate the fate and effect of a perennial, habitat-forming seaweed introduced to a coastal ecosystem. LÄS MER

3. 2. Targeting the prostate tumor microenvironment and vasculature : the role of castration, tumor-associated macrophages and pigment epithelium-derived factor

   Författare :Sofia Halin; Anders Bergh; Pernilla Wikström; Stina Rudolfsson; Carl-Henrik Heldin; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Prostate cancer; angiogenesis; castration therapy; microenvironment; stroma; tumor-associated macrophages; pigment epithelium-derived factor; PEDF; vasculature; Pathology; Patologi; patologi; Pathology;

   Sammanfattning : BACKGROUND: Prostate cancer is the most common cancer among Swedish men. For patients with metastatic prostate cancer the standard therapy is castration, a treatment that initially provides symptomatic relief but unfortunately is not curative. New therapeutic targets for advanced prostate cancer are therefore needed. LÄS MER

4. 3. A Design Process Based on Visualization

   Författare :Anders Wikström; Mats Jackson; Sofia Ritzén; Mälardalens högskola; []
   Nyckelord :Innovation and Design; innovation och design;

   Sammanfattning : The global market of today is tough and the competition between companies demands new ways of developing products and services. The current challenge for the design research community is to provide designers with a wider range of methods and tools to support specific activities within the design process and to improve its overall coordination. LÄS MER

5. 4. Marine seaweed invasions : Impacts and biotic resistance in native ecosystems

   Författare :Josefin Sagerman; Sofia Wikström; Fransisco Arenas; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plant invasion; exotic species; generalist herbivores; plant-herbivore interactions; enemy-release hypothesis; ecosystem function; marin ekotoxikologi; Marine Ecotoxicology;

   Sammanfattning : Marine seaweeds constitute one of the most productive plant systems known on Earth and a rich fauna including juvenile fish and crustaceans is dependent on the habitats they form. Human influence on marine costal ecosystems has resulted in large scale changes to the abundance and distribution of species, where species introductions constitute an obvious part. LÄS MER

7. 5. Policy by Public Procurement : Opportunities and Pitfalls

   Författare :Elon Strömbäck; Sofia Lundberg; Magnus Wikström; Carine Staropoli; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Public Procurement Auction; Environmental Policy; Regulation; Sustainability; Competition; Compliance Cost; Endogenous Entry; Supplier Incentives; Buyer Market Share; Split Award; Small and Medium Sized Enterprises; Economics; nationalekonomi;

   Sammanfattning : In Paper [I], we theoretically assess green public procurement (GPP) as an environmental policy instrument and its ability to lead to the achievement of environmental objectives. Central to our analysis is the extent to which polluting firms choose to adapt to the public sector's environmental requirements and to invest in greener technologies. LÄS MER