Popular Abstract in Swedish Under de senaste decennierna har osteoporos (benskörhet) erhållit allt större uppmärksamhet eftersom allt fler individer drabbas av åkomman. Osteoporos är en sjukdom som ökar med stigande ålder och framför allt drabbar kvinnor. Sjukdomen leder till ökad risk för fraktur (benbrott) och antalet osteoporosrelaterade frakturer har ökat markant under senaste halvan av 1900-tThis thesis considers the effect of physical activity on bone mass in weight-loaded and unloaded regions of the skeleton. Bone mass was measured by Dual X-ray Absorptiometry (DXA) and by Quantitative Ultrasound (QUS). In a cross-sectional study 67 male soccer-players, on different levels of the Swedish national league, were compared with 24 male controls. No differences were demonstrated between s

Popular Abstract in Swedish Kärnmagnetisk resonans (NMR) har använts för att studera proteiner i vattenlösning. Metoden studerar hur signalen från vatten återgår till jämvikt efter att ha störts från jämvikt med antingen en radiofrekvent puls eller genom en kraftig ändring av magnetfält. Återgången kallas på fackspråk för relaxation och hänger samman med molekylernas rörelse. Kopplingen till molekMagnetic relaxation dispersion measurements have been performed on aqueous protein solutions to study the dynamics of waters in the proton transport channel of bacteriorhodopsin and the self-association of the proteins BPTI, lysozyme and beta-lactoglobulin. The measurements have focused on the bulk relaxation rates, R1 and R2, of three water nuclei 1H, 2H and 17O that are coupled to the protein en

Popular Abstract in Swedish I denna avhandling presenteras en ny typ av röntgenkälla baserad på ett laser-producerat plasma. Röntgenstrålning alstras genom att fokusera laserpulser på ett strålmål. Energin i de enskilda laserpulserna blott är cirka 150 mJ, men tack vare den extremt korta pulstiden 100 fs (10E-13 s), blir laserns toppeffekt mer än 1 TW (10E12 W). Den extremt intensiva laserstrålninA laser-produced plasma was generated by focusing 100 fs laser pulses, with an energy of 150 mJ, onto metal targets. The laser intensity was expected to reach 10E17 W/cm2. Radiation was emitted from the created plasma, with photon energies extending up to the MeV regime. The laser-based X-ray source was optimised, with the purpose of making it a realistic source of hard X-rays (>10 keV). Dedicated

The ever growing demand for mobile communications is pushing the technology towards its very limits. In addition, the current technology is optimized for circuit-switched voice rather than bandwidth hungry services such as wireless Internet and multimedia applications. The third generation mobile systems that will be introduced in the near future are designed specifically to address these limitati

Photobiology -- the science of light and life -- begins with basic principles and the physics of light and continues with general photobiological research methods, such as generation of light, measurement of light, and action spectroscopy. In an interdisciplinary way, it then treats how organisms tune their pigments and structures to the wavelength components of light, and how light is registered

Popular Abstract in Swedish C-Med 100, en naturmedicin med immunomodulerande egenskaper Vårt immunsystem skyddar oss mot infektioner från bakterier, virus och parasiter. För att detta ska fungera behövs många olika egenskaper och idag delas immunsystemet in i två delar, en ospecifik och en specifik. Den ospecifika delen består av hud, slemhinnor, magsyra och olika celler som snabbt tar sig till etExtracts from the bark of the vine Uncaria tomentosa have anti-inflammatory, antiviral, antimutagenic and antioxidant effects. In this study, we evaluate the effects of an Uncaria tomentosa extract, denoted C-Med 100, on the cellular level of the immune system both in vivo and in vitro. Our results indicated that lymphocytes had significantly prolonged half life after in vivo supplementation with

Digital forensic investigators experience a need for support in their everyday struggle to overcome boundary problems associated with cyber crime inves-tigations. Traditional methods are socio-culturally and physically localised and dependent on strict and historically prescriptive political management. The new internet-worked cyber-world creates unprecedented difficulties for digital forensic inv