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Dual low-angle light scattering and refractometric detection coupled to size-exclusion chromatography provided proof for the presence of a low amount of stable aggregates/particles in ethyl(hydroxyethyl)cellulose. Unlike the correct size-exclusion chromatographic behavior of the parent polysaccharide itself, the aggregates exhibit variable size-dependent weak retention as a function of flow-rate a
We found that the Black grouse (Tetrao tetrix) possess low numbers of Mhc class II B (BLB) and Y (YLB) genes with variable diversity and expression. We have therefore shown, for the first time, that another bird species (in this case, a wild lek-breeding galliform) shares several features of the simple Mhc of the domestic chicken (Gallus gallus). The Black grouse BLB genes showed the same level of
The incidence of post-transfusion hepatitis non-A, non-B (PTH-NANB) was prospectively assessed in two areas in the southeast region of Sweden. Patients undergoing hip arthroplasty were studied with blood sampling for alanine aminotransferase analysis before and at 2, 3, and 4 months after transfusion. Of the patients 97% and 82% were transfused and received a mean of 5.5 and 3.4 units in Linkoping
With the recent interest in the chemical, electronic and optical properties of nanometer scale metal particles, there is now interest in manufacturing these materials in larger quantities. Since both small particle size and high particle number concentrations are sought, there is a need for improved. particle generation reactors that can realize both goals. Here, results are presented for the synt
Kan man bli en bättre läsare med hjälp genom någon av alla de snabbläsningskurser och hjälpmedel för snabbläsning som florerar på marknaden? Och fungerar det i så fall även för personer med läs- och skrivsvårigheter? - I denna artikel redogör docent Kenneth Holmqvist för myter och fakta kring ögat, hjärnan och snabbläsning. Kenneth är verksam vid Institutionen för kognitionsforskning vid Lunds uni
En hälsoekonomisk utvärdering av cellprovsscreening för cervixcancer har saknats vad gäller svenska förhållanden. I en modellstudie jämfördes effekter av och kostnader för gynekologisk cellprovskontroll med och utan tillägg av test för humant papillomvirus (HPV). Med cellprovsscreening i åldern 32–60 år vart tredje till vart femte år minskar risken att insjukna i invasiv cervixcancer med 88 procen
The electronic structure of h-BN films grown on the Ni(111) surface has been studied as a function of film thickness using the synchrotron radiation based spectroscopic techniques: soft x-ray absorption, core-level photoemission and resonant Auger spectroscopy. A manifestation of the strong orbital hybridization between Ni 3d and h-BN pi states has been consistently observed in all spectra, implyi
This report deals with identification of multivariable linear systems of finite order from measurements of input-output signals when the outputs are corrupted by additive random noises. The input-output relations of such systems can be described by a vector difference equation. A canonical form for the matrix coefficients of this equation is proposed and its existence and uniqueness are shown. Thi
in this paper, the problem of diffraction of a spherical wave by a hard half-plane is considered. The starting point is the Biot-Tolstoy theory of diffraction of a spherical wave by a fluid wedge with hard boundaries. In this theory, the field at a point in the fluid is composed eventually of a geometrical part: i.e., a direct component, one or two components due to the reflections on the sides of
Abstract in German Zur Bestimmung der Prävalenz vonHepatitis A Virus-Antikörpern (anti-HAV) bei Drogenabhängigen wurden Seren von 234 Drogenabhängigen mit akuter Hepatitis B, die in einer schwedischen Stadt während zehn Jahren gesammelt worden waren, auf anti-HAV getestet. Zum Vergleich wurde eine normale Bevölkerungsgruppe herangezogen, bei der nur 3,8% der nach 1950 Geborenen und 8,2% der JahrgäTo determine the prevalence of antibodies to Hepatitis A virus (anti-HAV) among drug addicts, sera collected in a Swedish city during a ten-year period from 234 drug addicts with acute hepatitis B were tested for anti-HAV. The results were compared with the normal population, where only 3.8% of those born after 1950 were anti-HAV-positive. In individuals born between 1941 and 1965, 8.2% in the nor
Adsorption of 0.2 ML Na on Al(1 0 0) at room temperature yields a disordered Al(1 0 0)-(1 x 1)-Na phase, which transforms reversibly to a well-ordered Al(1 0 0)-(root5 x root5)R27degrees-Na phase on cooling below 250 K. Based on low energy electron diffraction (LEED) and high resolution core-level spectroscopy (HRCLS) measurements, and on ab initio calculations, it is concluded that the structure
Host-plant volatiles or other volatiles that attract moths, especially females, could be useful as trap baits or as a complement to pheromones in pest management. Three chocolate products, which had previously been found to be attractive to other pyralid moths, were screened by combined gas chromatography-electrophysiology for compounds that could be used for trapping of Ephestia kuehniella Zeller
This paper presents a study of the turbulence field in an optical diesel engine operated under motored conditions using both large eddy simulation (LES) and Particle Image Velocimetry (PIV). The study was performed in a laboratory optical diesel engine based on a recent production engine from VOLVO Car. PIV is used to study the flow field in the cylinder, particularly inside the piston bowl that i
Popular Abstract in Swedish Avhandlingen innehåller en ny metod att behandla ekvationer av den typ som styr t.ex. värmeledning och diffusion. Användning av ''halva derivator'' i tidsled möjliggör ett angreppssätt mycket likt den välkända Dirichlets princip inom elektrostatiken. Fördelen jämfört med existerande metoder är att den nya metoden ger en enkel och strömlinjeformad behandling av källtermeIn this work we study a variational method for treating parabolic equations that yields new results for non-linear equations with low regularity on source and boundary data. We treat mainly strongly parabolic quasilinear equations and systems in divergence form. The basic idea is to compose the parabolic operator with a weighted sum of the identity operator and the Hilbert transformation in the ti
Popular Abstract in Swedish Denna avhandling baseras på studier av de provtagningscykloner vilka används vid yrkeshygienisk provtagning av respirabelt damm i Sverige och andra andra länder i Europa. Målsättningen för arbetet har varit att avgöra huruvida cyklonernas mätvärden är valida relativt internationella provtagningskonventioner för respirabelt damm, samt eventuellt förbättra deras överensstThe performance of cyclones used in occupational hygiene for sampling respirable dust was studied. Test methods for experimental determination of cyclone penetration have been designed and validated. The penetration curve for a sampling cyclone presently used in Europe was measured. The sampler's performance relative to three sampling conventions for respirable dust was determined. The cyclone was
