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A novel volatile microemulsion formed by the catanionic surfactant hexadecyltrimethylammonium octylsulfonate (TA(16)So(8)), heptane and water has been explored as a template for producing nanoparticles of hydrophobic organic materials. Butylated hydroxytoluene (BHT) was employed as the model hydrophobic substance. First, the oil-in-water microemulsion was formed, containing TA16So8 as the single e
Many issues in computational vision can be understood from the interplay between camera geometry and the structure of images and objects. Typically, the image structure is available and the goal is to reconstruct object structure and camera geometry. This is often difficult due to the complex interdependence between these three entities. The theme of this thesis is to use invariants to solve these
Intestinal spirochetes (Brachyspira spp.) are causative agents of intestinal disorders in animals and humans. Phylogenetic analysis of cloned 16S rRNA genes from biopsies of the intestinal mucosa of the colon from two Swedish 60-years old adults without clinical symptoms revealed the presence of intestinal spirochetes. Seventeen clones from two individuals and 11 reference strains were analyzed an
The effect of photodynamic therapy on tape-stripped normal human skin was explored ultrastructurally. Back skin areas of 3 healthy Caucasian volunteers, 2 men and 1 woman, were tape-stripped 10 consecutive times followed by topical treatment with 5-aminolevulinic acid (20%, w/w) for 4 hours under occlusion (Tegaderm(R)). Then the areas were irradiated for 30 minutes with Waldman PDT 1200 lamp (570
This thesis studies the computational complexity and polynomial-time approximability of a number of discrete combinatorial optimization problems involving labeled trees and strings. The problems considered have applications to computational molecular biology, pattern matching, and many other areas of computer science. The thesis is divided into three parts. In the first part, we study some proble
Aims: A study was undertaken to investigate the relationship between country of birth, time in Sweden, and overweight and obesity. Methods: Approximately 4,000 people aged 20-80 participated in a cross-sectional survey in 1994. The ethnic differences in overweight and obesity were analysed in a multivariate logistic regression analysis adjusting for age and education. The effect of number of years
The ability to predict clinical image quality from physical measures is useful for optimization in diagnostic radiology. In this work, clinical and physical assessments of image quality are compared and correlations between the two are derived. Clinical assessment has been made by a group of expert radiologists who evaluated fulfillment of the European image criteria for chest and lumbar spine rad
Popular Abstract in Swedish Som en blixt från klar himmel drabbas en ung, och till synes frisk person, av hjärnblödning. Denna stroke leder till demens och efterföljande nya blödningar leder slutligen till en för tidig död. Man har kunnat visa att denna sjukdom beror på att en variant av ett visst protein, cystatin C, tvinnar ihop sig till rep-liknande långa fibriller. Dessa fibriller ansamlas sedAmyloidosis is a group of diseases characterized by a change in protein conformation resulting in aggregation and tissue deposition of amyloid fibrils. One variant of cystatin C, L68Q cystatin C, is highly amyloidogenic and persons carrying the corresponding gene suffer from massive cerebral amyloidosis leading to brain hemorrhage and death. Amyloidogenic proteins like cystatin C and prion protein
Populärvetenskaplig sammanfattning: I en mosse i södra Sverige, som heter Viss mosse, har fynd av trädstammar gjorts. Fynden gäller ek, bok och al. Denna horisont med trädstammar tyder på att miljön på mossen var förhållandevis torr när träden levde, eftersom det normalt sett är för blött på en mosse för att ekar och bokar ska kunna växa där. Kol-14-dateringar visar att träden dog för cirka 3 200 Findings of a tree stump horizon in Viss mosse, a raised bog in Scania, southern Sweden, indicate relatively dry conditions on the bog during the lifetime of the trees . 14C-datings show that the trees died about 3 200 years ago. Four peat cores were collected from the bog in order to investigate whether climatically induced water level fluctuations were responsible for establishemt and death of t
Tvister om kulturföremål har sedan en lång tid tillbaka varit en återkommande fråga. Många gånger har dessa tvister uppstått innan de internationella konventionernas tillkomst och förblir än idag olösta. Uppsatsens syfte har varit att belysa den problematik som finns rörande bortförda kulturföremål och förflyttade mänskliga kvarlevor, samt äganderätten till dessa. Frågan har lyfts om det finns skiDisputes concerning artefacts have been a recurring issue for a long period of time. Some of these disputes arouse before international conventions existed and remain unsolved to this day. The purpose of this study has been to elucidate the problems related to eloigned cultural property and displaced human remains as well as the proprietary concerning these objects. Questions have been raised whet
The aim of this study was to understand how elderly immigrants are being categorized in the discussion about ethnical elderly homes and which descriptions of problems are used to argue for the existence of the ethnical homes, from a social constructionist point of view. Furthermore, we investigate who the claims-makers are and how concepts such as ethnicity and culture are portrayed in this discus
Sammanfattning Svensk polis saknade länge ett uttalat lagstöd för rätten att använda våld. De gavs i äldre lagstiftning en befogenhet att bruka nödvändigt våld för att avvärja ett livsfarligt angrepp på sig själv eller någon annan. Däremot förelåg dem ingen rätt att vid ett ingripande ta till våld. Svensk polis ska alltid försöka hitta andra utvägar än våld för att lösa en uppgift inom ramen för Summary Swedish police lacked for a long period of time an explicit legal basis for the right to use force. They were in an older legislative powered to operate necessary force to repel a life threatening situation on himself or anyone else. However, the police had no given right to take on violence due to an intervention. Swedish police should always try to find other ways than violence to solve
This thesis evaluates the UNISDR led campaign Making Cities Resilient and specifically investigates how cities are matched within the campaign’s initiative city-to-city learning, which factors that may be conducive for successful partnerships as well as whether the participating cities implements activities in accordance with the rights-based approach. The evaluation is partly based on a literatur
Fractions rich in indigestible carbohydrates, such as fructan and arabinoxylan, are obtained as by-products when ethanol, starch, and gluten are produced from wheat flour. Today, these fractions are used as animal feed. However, these components may have positive physiological effects in humans. In this study, the content of indigestible carbohydrates in distillers' grains and process streams from
Osteoblastoma is a bone forming tumor with histological features highly similar to osteoid osteoma; the discrimination between the tumor types is based on size and growth pattern. The vast majority of osteoblastomas are benign but there is a group of so-called aggressive osteoblastomas that can be diagnostically challenging at the histopathological level. The genetic aberrations required for osteo
Purpose: Flattening filter free (FFF) beams generated by medical linear accelerators have recently started to be used in radiotherapy clinical practice. Such beams present fundamental differences with respect to the standard filter flattened (FF) beams, making the generally used dosimetric parameters and definitions not always viable. The present study will propose possible definitions and suggest
We present an assessment of the barium abundance ratios for red giant member stars in the faint Hercules dwarf spheroidal (dSph) galaxy. Our results are drawn from intermediate-resolution FLAMES/GIRAFFE spectra around the Ba II 6141.71 angstrom absorption line at low signal-to-noise ratios. For three brighter stars we were able to gain estimates from direct equivalent-width measurements, while for
Although the visual flight control strategies of flying insects have evolved to cope with the complexity of the natural world, studies investigating this behaviour have typically been performed indoors using simplified two-dimensional artificial visual stimuli. How well do the results from these studies reflect the natural behaviour of flying insects considering the radical differences in contrast
The International Commission on Radiological Protection (ICRP) does not have a specific publication or recent detailed advice on acceptability criteria and suspension levels for medical radiological equipment. However, a number of the Commission's publications clearly stress the need to carry out acceptance testing of radiological equipment. Such general recommendations are frequent in earlier and
In this thesis, genetic alterations in bone and soft tissue tumors have been investigated with the purpose of identifying regions of importance for tumor development, diagnosis and prognosis. This has primarily been performed by array comparative genomic hybridization analysis and gene expression profiling of cytogenetically analyzed tumors. In Article I, the content of ring chromosomes in a subse
