Sökresultat

In hybrid zones genetically differentiated populations meet and interbreed. As they result from ongoing divergence and potential speciation, such zones provide opportunities to study how different factors affect this process. The hybrid zone between the all black carrion crow (Corvus corone corone) and the grey and black hooded crow (Corvus c. cornix) stretches c. 2400 km throughout Europe. I have

Popular Abstract in Swedish Det här är en studie av Wallace Stevens poetik och poesi med inriktning på 1930-talet, då hans poesi påverkades av en kraftig kulturell press på socialt engagemang och politisk användbarhet. Argumentet framställer hur olika men samverkande element i hans poetiska språk, som diktion, prosodi och metafor, under den här perioden utnyttjas för att skapa ett intryck av estetThis dissertation studies Wallace Stevens? ideas and practice of poetic language with a focus on the 1930s, an era in which Stevens persistently thematized a keenly felt pressure for the possible social involvement and political utility of poetic language. The argument suggests how mutually implicated elements of his poetry such as diction, prosody and metaphor are relied on to signify or enact ae

In this book, three historical macro-regions are analysed: East Asia, Southeast Asia and Mesoamerica. By comparing three very different historiographical patterns from the specific point of view of social militarisation, we gain an outsider's perspective that proves to be very illuminating. Due to structural features of the various scholarly arenas the three regions turn out very differently. Some

TiO2(B), a potential catalyst support, has been synthesized from a support precursor, K2Ti4O9. High resolution electron microscopy revealed that the 32% volume loss in this transformation is achieved by formation of facetted microvoids, around 10 nm in size, maintaining the morphology and size of the original crystals. A structural mechanism, including a hypothetical structure for a K2Ti 2O5 inter

Eukaryotic protein kinases, containing a conserved catalytic domain, represent one of the largest superfamilies of the eukaryotic proteins and play distinct roles in cell signaling and diseases. Near completion of rat genome sequencing project enables the evaluation of a near complete set of rat protein kinases. Publicly accessible genetic sequence databases were searched for rat protein kinases,

Popular Abstract in Swedish För att celler ska kunna växa och dela sig behöver de många olika ämnen, till exempel vitaminer, mineraler och polyaminer. Polyaminer finns i alla celler och de krävs för att cellerna ska kunna dela eller specialisera sig. Cellerna kan både själva tillverka polyaminer och ta upp dem från omgivningen. I mänskliga celler finns framför allt de tre polyaminerna putrescin, sOur research group has previously shown that treatment with the polyamine biosynthesis inhibitors a-difluoromethylornithine (DFMO) or amidinoindan-1-one 2´-amidinohydrazone (CGP 48664) inhibited S phase progression before any other cell cycle phase was affected. This study was undertaken to further investigate the role of polyamines in the regulation of S phase progression and DNA synthesis. I hav

The objective of this work was to study the formation of DNA-cationic vesicle complexes (lipoplexes). These complexes are interesting not only from a fundamental point of view but also as promising candidates for gene therapy. The approach taken was to study first the cationic vesicles by themselves. This will allow us to better understand the "complexation mechanism" upon the addition of DNA. The

Sweden of the eighteenth and nineteenth centuries was visited and toured by a number of British author-travellers, whose subsequently published views of and on the country and its people are examined and presented in this thesis. Using as primary sources British-published monographs deriving, wholly or in part, from an experienced Sweden of c.1770-1865, it has been possible to identify and define

Publisher Summary: This chapter discusses two major developments that have taken place over the past decade. First is the enormous wealth of energy band calculations that have had tremendous success in explaining the properties of specific solids, but in which the connection with first principles is not always apparent. Second is the spectacular progress of many-body theory applied to the solid st

Popular Abstract in Swedish Selen är ett essentiellt näringsämne som behövs för att upprätthålla flera viktiga funktioner i kroppen, huvudsakligen genom en speciell grupp proteiner som heter selenoproteiner. Det finns minst 25 stycken olika selenoproteiner i människan och flera av dem skyddar kroppen mot oxidation medan vissa andra sköter regleringen av sköldkörtelhormoner. Många selenoproteiners Selenium is a micronutrient that is essential for many important life processes due to the action of the specific selenoproteins containing one or more of the 21st amino acid, selenocysteine. Twenty-five selenoprotein genes have been found in the human genome but the function of many of them is not yet known. Some of the characterised selenoproteins have, however, antioxidant properties. Selenium