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Investigations on exposure to electromagnetic have generated conflicting results both in epidemiological and laboratory studies, leaving their possible health consequences largely inconclusive. One of the well-reported reasons for the discrepancies is that there is no generally accepted theory to describe the interactions between the very weak electromagnetic fields and the living cells. This work

Pt-TiO2-C composites with different titanium oxide loading were synthesized by photo-deposition and chemical vapor deposition methods. The changes in their electronic properties improve the electrochemical activity toward the oxygen reduction reaction (ORR) compared to the Pt-C catalyst synthesized at the same conditions. The platinum samples were physically characterized by means of Transmission

Experiments are carried out on partially premixed turbulent flames stabilized in a conical burner. The investigated gaseous fuels are methane, methane diluted with nitrogen, and Mixtures of CH4, CO, CO2, H-2 and N-2, Simulating typical products from gasification of biomass, and co-firing of gasification gas with methane. The fuel and air are partially premixed in concentric tubes. Flame stabilizat

The effects of avian malaria parasites of the genus Plasmodium on their hosts are insufficiently understood. This is particularly true for malarial co-infections, which predominant in many bird populations. We investigated effects of primary co-infection of Plasmodium relictum (lineage SGS1) and Plasmodium ashfordi (GRW2) on experimentally infected naive juveniles of siskin Spin us spinus, crossbi

Identifying the genes that underlie phenotypic variation in natural populations, and assessing the consequences of polymorphisms at these loci for individual fitness are major objectives in evolutionary biology. Yet, with the exception of a few success stories, little progress has been made, and our understanding of the link between genotype and phenotype is still in its infancy. For example, alth

Processes of rapid radiation among unicellular eukaryotes are much less studied than among multicellular organisms. We have investigated a lineage of cold-water microeukaryotes (protists) that appear to have diverged recently. This lineage stands in stark contrast to known examples of phylogenetically closely related protists, in which genetic difference is typically larger than morphological diff

G-protein-regulated inward-rectifier potassium channel 2 (GIRK2) is reported to be expressed only within certain dopamine neurons of the substantia nigra (SN), although very limited data are available in humans. We examined the localization of GIRK2 in the SN and adjacent ventral tegmental area (VTA) of humans and mice by using either neuromelanin pigment or immunolabeling with tyrosine hydroxylas

Dementia is the most common cause of functional decline among elderly people and is associated with high costs of national healthcare in European countries. With increasing functional and cognitive decline, it is likely that many people suffering from dementia will receive institutional care in their lifetime. To delay entry to institutional care, many European countries invest in home and communi

A simple method is tested for scaling climate-extreme results from high resolution regional climate models (RCMs) to time-periods and emission scenarios for which the RCMs have not been run. The 30 yr mean relationships between indicators of extremes (IoEs) and annual mean daily maximum temperature (T-xa) are investigated. Such relationships from the UK Met Office Hadley Centre RCM HadRM3P, along

Reconstructions of solar activity prior to AD1600 rely on estimates of the past production rates of cosmogenic radionuclides in the Earth’s atmosphere. These rates are modulated by the strength of the solar magnetic field and the intensity of the Earth’s geomagnetic dipole. One of the largest uncertainties associated with these reconstructions originates from palaeointensity data and to show how e

Popular Abstract in Swedish Livskvalitet och problem i dagligt liv under och efter akut leukemi eller högmalignt lymfom - ett omvårdnadsperspektiv. Syftet med avhandlingen var att undersöka hur personer med akut leukemi eller hög- malignt lymfom upplevde och hanterade de problem som uppstod i det dagliga livet i samband med sjukdom och behandling och efter det att behandlingen avslutats. StudierThe aims of this thesis were, to investigate the impact on daily living of acute leukaemia or highly malignant lymphoma when under treatment, viewed retrospectively and from a longitudinal perspective, from the point of view of the patients and their spouses, and to ascertain their view of the nursing care provided. A combination of qualitative and quantitative methods was use i.e. open-ended inte

There is a considerable amount of data in humans showing that patients who cannot take in nutrients enterally have more organ failure in the intensive care unit, a less favourable prognosis, and a higher frequency of septicaemia, in particular involving bacterial species from the intestinal tract. However, there is little evidence that this is connected with translocation of bacterial species in h

Popular Abstract in Swedish I Sverige betonas idag alltmer det hälsofrämjande arbetet riktat mot barn, ungdomar och deras föräldrar. Olika föräldrastödsaktiviteter erbjuds. Det behövs ökad kunskap om varför vissa aktiviteter fungerar bättre än andra. Det är även viktigt att känna till föräldrarnas motiv för att deltaga och upplevelser av stödaktiviteten. Syftet med denna avhandling var att belysa In today's Swedish society there is increasing emphasis on health-promotive work among children, adolescents, and their parents. Knowledge is needed about why certain activities work better than others. It is important to study the parents' motives and experiences of participating in parental supporting programmes. In child health care, mostly among the nurses, there is a contrast between what th

Popular Abstract in Swedish Denna avhandling utgår ifrån en önskan att finna en växtart som är diploid fakutativ apomikt. En diploid är en organism som, liksom människan, innehåller två kromosomuppsättningar, och en fakultativ apomikt är en växt som sätter frön både sexuellt (med befruktning) och apomiktiskt (utan befruktning). En växt med de begärda egenskaperna skulle ge oss goda möjligheter attFinding a diploid facultative apomictic plant species would give a great opportunity to solve problems concerning the existence and persistence of sexuality and also, it would be a possible source to get a transferable apomictic gene from. The putative diploid facultative apomict Potentilla argentea from southern Sweden was investigated with RAPD, isozymes and flow cytometry. Its mode of reproduct

Popular Abstract in Swedish Graviditetsdiabetes (GD) är en sjukdom utan någon allmänt erkänd definition och vars prognos för kvinnan och hennes foster/barn är omdiskuterad. Därför har det från etisk synpunkt ifrågasatts om man verkligen ska försöka identifiera den. Rapporter har dock angivit ökad risk att få stora barn för tiden och ökad perinatal dödlighet vid graviditetsdiabetes samt att dessa kGestational diabetes (GD) is still a nonentity disease. There is no worldwide consensus how to define it or whether it is harmful to the woman or fetus. Therefore, from an ethical point of view, it is uncertain whether one should try to identify it. Since 1991, all pregnant women in Lund are offered a 75g oral glucose tolerance test (OGTT) at 27 – 28 weeks of pregnancy. In Sweden, the definition o

Popular Abstract in Swedish Streptococcus pyogenes (GAS) är en viktig sjukdomsframkallande bakterie som orsakar alltifrån lindriga infektioner som halsfluss (tonsillit) och svinkoppar (impetigo) till livshotande djupa infektioner som nekrotiserande fasceit eller ”Toxic shock syndrom”. På grund av det snabba sjukdomsförloppet i de livshotande infektionerna har streptokockerna fått beteckningen ”mörA distinguishing feature of Streptococcus pyogenes (GAS) is their ability to resist phagocytosis in whole human blood in the absence of type-specific antibodies, a property that is dependent on the expression of the surface associated M proteins. A common characteristic of M proteins is their interaction with a variety of host proteins including the complement regulatory protein factor H (FH) and

Popular Abstract in Undetermined Denne afhandling præsenterer en ny udlæsnings metode udviklet til cantileverbaserede sensorer. Cantilevere er tynde vipper, der er fastgjorte i den ene ende, og som igennem de seneste ti °ar har vist sig at være en interessant ny type bio/kemisk sensor. Den specifikke genkendelse af et kemikalie viser sig ved at cantileveren bøjer som følge af det skabte overfladesThis thesis presents a novel read-out method developed for cantilever-based sensors. Cantilevers are thin beams clamped at one end and during the last 10 years they have emerged as an interesting new type of bio/chemical sensor. The specific recognition of a chemical manifests itself as a bending of the cantilever from the generated surface stress. Conventionally the read-out used for this type of

In this work, influence of hydrogen and temperature on the fracture toughness parameters of unirradiated, cold worked and stress relieved (CWSR) Zr-2.5Nb pressure tube alloys used in Indian Pressurized Heavy Water Reactor is reported. The fracture toughness tests were carried out using 17 mm width curved compact tension specimens machined from gaseously hydrogen charged tube-sections. Metallograph