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Dynamics of optically excited electronic states have been studied in solid films and solutions of semiconducting polymers and model compounds. Transient absorption, monitored in the spectral range from 0.9 eV to 2.5 eV with a time resolution of about 100 fs, was the main experimental technique. Transient anisotropy, obtained from different polarizations of light, was employed to trace the dipole m

Popular Abstract in Swedish Njurcancer är ungefär den 10:e vanligaste tumörformen i Sverige och diagnosticeras nästan dubbelt så ofta hos män som hos kvinnor. Tumörerna upptäcks vanligtvis i åldern mellan 50 och 70 år och de mest förekommande symtomen är blod i urinen och flanksmärtor. Varför man får njurcancer är inte känt, men det finns ett klart samband med rökning och asbest. Njurcancer kan upIn the present thesis normal kidney tissue and renal cell carcinoma (RCC) were studied by cytogenetic and fluorescence in situ hybridization (FISH) methods to investigate chromosomal aberrations. In the first study, 4 samples of nonneoplastic kidney tissue were cultured for cytogenetic analysis and trisomy 7 was found in all cases in 3-15% of the cells. In the second study, cytogenetic analysis o

Three methods are presented to calculate the load distribution in a chain drive containing two sprockets and one chain. The rollers, which are in contact with the sprockets, can move along the tooth flanks and their positions are given by force equilibrium. Since the positions of the rollers, and thereby also the load distribution, depend on the two connecting spans, it has been necessary to inclu

Popular Abstract in Swedish Manniskan utsatts dagligen for sjukdomsframkallande bakterier och virus, vilka maste tas omhand och oskadliggoras. Var hud och slemhinnor fungerar som ett forsta fysiskt och biokemiskt skydd. De som tar sig forbi denna barriar angrips av vart immunforsvar. De vita blodkropparna ar de celler, som snabbast rycker ut till vart forsvar och ater upp och forstor angriparen. DT cell activation requires the combination of antigen in the context of MHC and costimulatory molecules to induce a functional immune response. For our studies, we primarily utilized superantigens (SAg) that bind MHC class II molecules as first signal. Mutations in the SAg MHC class II a-chain binding site reduced the number of responding T cells expressing particular TCR Vb chains, whereas mutati

Three pyralid moths, the Mediterranean flour moth (Ephestia kuehniella), the almond moth (Ephestia cautella) and the Indian meal moth (Plodia interpunctella), infest food products all over the world and cause severe problems in factories, shops and households. For health and environmentalreasons chemical control becomes more and more restricted. We here present some promising results offering effi

The over-riding aim of this thesis was to obtain a deeper understanding of the way patients with cardiac problems view both information related to their health and medical decisions and their role in decision-making processes. An important objective was to identify reasons why patients do not ask for or assimilate information or why they do not want or feel that they are able to influence medical

Recycling of building waste can considerably reduce the need for energy and natural resources and reduce the amount of material to landfill. Knowledge of the size of the annual conservation potential is important. The purpose of this study was to assess the conservation of energy and natural resources and the amount of material to landfill by recycling building waste in Sweden. Two recycling scena

This thesis is a summary of five papers concerning endocyclic cleavage of glycosides and related acetals. Simple lactol ethers undergo endocyclic cleavage to give acyclic chain extended products on treatment with organoaluminium and organotitanium reagents. The first examples where organotitanium reagents induced alkylative endocyclic cleavage of carbohydrates is presented. The best conditions for

This book brings into question the dichotomies inherent in the sociology of law. It is a journey in search of a method capable of taking us beyond the theoretical limitations imposed on socio-legal research by sharply defined divisions such as “law on the books” and “law in action”, “formal” and “informal law”, “facts” and “norms”, “form” and “substance”, “internal” and “external” legal cultures o

Popular Abstract in Swedish Ta en titt på min hemsida för en kort sammanfattning av mitt arbete. Där finns dessutom kartor och foton m.m. Det kommer även att finnas en komplett nerladdningsbar version av avhandlingen. http://www.geol.lu.se/personal/FKH/shome.htmlThis thesis deals mainly with age-investigations of metasedimentary and magmatic rocks of Ny Friesland, located in the northeastern Svalbard. However, the provenance of quartz-porphyry clasts in a Devonian conglomerate have also been investigated in northwestern Svalbard. This information is important for reconstructions of plate movements in the high Arctic during the Caledonian orogeny and earli

Popular Abstract in Swedish Den eosinofila granulocyten är en typ av vit blodkropp som ingår i kroppens immunförsvar. Vid allergirelaterade sjukdomar ses en ökad mängd av eosinofiler i blodbanan samt lokalt i den allergiskt inflammerade vävnaden. I vävnaden släpper eosinofilerna ut sina granulaproteiner som har celldödande, immunförsvarsreglerande och tillväxtfrämjande egenskaper. Hos patienter meIn allergic disorders, the eosinophilic granulocytes migrate to affected tissues and release granule proteins with cytotoxic, immunoregulatory, and remodeling-promoting properties. Given that degranulation is reflected by a loss in eosinophil granule density of living cells, or by cell membrane rupture and release of intact granules, these morphological changes may represent a biomarker of the all