| 1. |
- Bin Kaderi, Mohamed Arifin, 1978-
(författare)
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Assessment of Novel Molecular Prognostic Markers in Chronic Lymphocytic Leukemia
- 2010
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The clinical course of chronic lymphocytic leukemia (CLL) is highly heterogeneous, which has prompted the search for biomarkers that can predict prognosis in this disease. The IGHV gene mutation status and certain genomic aberrations have been identified as reliable prognostic markers of clinical outcome for this disorder. However, the search for more feasible prognostic markers in CLL is still being pursued. Recently, certain single nucleotide polymorphisms (SNPs) in the GNAS1, BCL2 and MDM2 genes and the RNA expression levels of the LPL, ZAP70, TCL1, CLLU1 and MCL1 genes were suggested as novel prognostic markers in CLL. In papers I-III, we performed genotyping analyses of the GNAS1 T393C, BCL2 -938C>A and MDM2 SNP309 polymorphisms in 268-418 CLL patients and related the genotypes with clinical data. Association studies between the polymorphisms and established prognostic markers (i.e. IGHV mutation status, genomic aberrations, CD38 expression) were also performed. Our studies did not find any significant relationship between these SNPs with either clinical outcome or other known prognostic markers in CLL. In paper IV, we measured the RNA expression levels of LPL, ZAP70, TCL1, CLLU1 and MCL1 in 252 CLL cases and correlated these levels with clinical outcome. Here, we verified that high expression of all these RNA-based markers, except MCL1, were associated with an unfavourable prognosis. We also confirmed a close relationship between IGHV mutation status and the RNA-based markers, especially for LPL and CLLU1 expression. Among the RNA-based markers, multivariate analysis revealed LPL expression as the strongest independent prognostic marker for overall survival and time to treatment. Furthermore, the RNA-based markers could add further prognostic information to established markers in subgroups of patients, with LPL expression status giving the most significant results. In summary, data from papers I-III could not verify the GNAS1 T393C, BCL2 -938C>A and MDM2 SNP309 polymorphisms as prognostic markers in CLL. Future SNP markers must hence be confirmed in large, independent cohorts before being proposed as prognostic marker in CLL. In paper IV, we conclude that LPL expression appears to be the strongest among the RNA-based markers for CLL prognostication. Further efforts to standardize LPL quantification are required before it can be applied in the clinical laboratory to predict clinical outcome in this disease.
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| 2. |
- Fritze, Stefan, et al.
(författare)
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Elemental distribution and fracture properties of magnetron sputtered carbon supersaturated tungsten films
- 2024
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Ingår i: Surface & Coatings Technology. - : Elsevier BV. - 0257-8972 .- 1879-3347. ; 477
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Tidskriftsartikel (refereegranskat)abstract
- The combination of strength and toughness is a major driving force for alloy design of protective coatings, and nanocrystalline tungsten (W)-alloys have shown to be promising candidates for combining strength and toughness. Here we investigate the elemental distribution and the fracture toughness of carbon (C) alloyed W thin films prepared by non-reactive magnetron sputtering. W:C films with up to ~4 at.% C crystallize in a body-centered-cubic structure with a strong 〈hh0〉texture, and no additional carbide phases are observed in the diffraction pattern. Atom probe tomography and X-ray photoelectron spectroscopy confirmed the formation of such a supersaturated solid solution. The pure W film has a hardness ~13 GPa and the W:C films exhibit a peak hardness of ~24 GPa. In-situ micromechanical cantilever bending tests show that the fracture toughness decreases from ~4.5 MPa·m1/2 for the W film to ~3.1 MPa·m1/2 for W:C films. The results show that C can significantly enhance the hardness of W thin films while retaining a high fracture toughness.
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| 3. |
- Kvist Geverts, Karin, 1974-
(författare)
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Ett främmande element i nationen : Svensk flyktingpolitik och de judiska flyktingarna 1938−1944
- 2008
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The aim is to increase our understanding of the mechanisms of social categorization and discrimination, as well as the connection between them. This has been accomplished by examining Swedish refugee policy towards Jewish refugees during the Second World War and the Holocaust, as conducted by The Foreigner’s Bureau of the National Board of Health and the Ministry of Foreign Affairs during 1938−1944. The study also compares the Swedish refugee policy with that of Denmark, Switzerland, Great Britain and the United States. The investigation is guided by such concepts as social categorization, discrimination, antisemitism, organizational culture and established practice. The primary sources are documents, minutes and personal dossiers; Svensk författningssamling (legislation) and articles in Sociala Meddelanden (the National Board’s official journal).The main conclusions are that Sweden was not perceived as a country of immigration, based partly of the widespread fear that too many Jewish refugees would create a “Jewish Question”. Swedish authorities discriminated against Jewish refugees on grounds of “race” through a process of categorization. This process began already in the 1920’s, and gradually transformed the definition of “Jew” from a religious to a “racial” definition, based on the Nuremberg Laws. The differentiation of Jewish refugees in official statistics ceased in September 1943, yet it continued secretly until February 1944, encompassing the Norwegian and Danish Jews as well. One important result shows that the shift in policy – from discrimination to large scale reception – was a slow process where this differentiating practice and antisemitic perceptions remained operative. What is defined as an antisemitic background bustle is used to explain how moderate antisemitic expressions were perceived as “unbiased” and “normal” within the Swedish society. Though Sweden’s refugee policy seems similar to that of other countries surveyed, the shift in policy stands out as unique in comparison.
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| 4. |
- de Woul, Mattias, 1972-
(författare)
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Response of glaciers to climate change : Mass balance sensitivity, sea level rise and runoff
- 2008
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The purpose of this study is to enhance our understanding of the response of glaciers to climate change. Global sea level is affected by changes in glacier ice volume, and melt-water from glaciers is a principal water source in many regions. This study applies glacier mass balance modelling, with varying complexity and spatial resolution, ranging from individual glaciers to regional and global assessments of glacier mass losses. Glaciers located in maritime environments generally show considerably higher mass balance sensitivities than those in continental settings. On average, an assumed increase in annual precipitation of +10% tends to offset the effect of an annual temperature change of +1 K, by roughly 20%. Two case studies, at Storglaciären, Sweden, and Hofsjökull, Iceland, involve model results of future mass balance change and glacier melt induced changes in runoff. Applying a temperature and precipitation scenario for Iceland in 2050 results in increased total runoff from Hofsjökull by roughly one third, and results emphasize the role of the firn layer in delaying water flow through glaciers, yielding a redistribution of discharge within the year. Based on a global gridded data set of glacierized area, the sea level equivalent from all mountain glaciers and ice caps outside the ice sheets in Greenland and Antarctica during 1961–2004, caused by changes in temperature and precipitation, is estimated to be 0.58±0.34 mm a–1. The mountain glaciers and ice caps around Antarctica alone contribute almost 40% of the global estimate, and hence their contribution is considerably larger than previously assumed.
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| 5. |
- Ekman, Mattias, 1974-
(författare)
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Den globala rättviserörelsen i svenska medier : Hegemoniska formationer i relationen mellan journalistik och kapitalism
- 2011
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The mobilisations against global summits towards the end of the last millennium, and the creation of the World Social Forum (WSF) in 2001, made an emerging global network of social movements visible. This thesis analyses media representations of the global justice movement, with the intention of exploring the relation between journalism and hegemonic formations in the capitalist system. The analysis includes representations of social mobilisations against global summits between 1999 and 2007, and the WSF between 2001 and 2007, in all Swedish daily newspapers. The analysis draws on theories of journalism as a social institution, and Gramsci’s concept of hegemonic formations.Using critical discourse analysis (CDA), the dissertation reveals that the representation of protests subordinates political aspects to violence, and that discursive violence presupposes physical violence. The protests are generally defined from of a hegemonic position of the political, but sometimes protest emerges in relation to legitimate political departure points. Simultaneously it is also downplayed as anti-political. The representation of WSF is more heterogeneous. It is portrayed as: an alternative, an anti-movement, and a carnival. Some aspects of violence are also highlighted through the presence of absent violence. The representations both reproduce a hegemonic order, and in some cases highlight hegemonic struggle.The thesis concludes that the global justice movement actualizes relations between dominance and resistance in the global system, but that the distance between the social mobilization and the Swedish context, transforms the protests and the WSF to temporary and partly isolated events. The historical continuity in the relations between social mobilization and news journalism shows that social movements cannot rely upon conventional news coverage.
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