Sökresultat

Filtyp

Din sökning på "*" gav 535639 sökträffar

An international dosimetry exchange for boron neutron capture therapy, Part I : Absorbed dose measurements

An international collaboration was organized to undertake a dosimetry exchange to enable the future combination of clinical data from different centers conducting neutron capture therapy trials. As a first step (Part I) the dosimetry group from the Americas, represented by MIT, visited the clinical centers at Studsvik (Sweden), VTT Espoo (Finland), and the Nuclear Research Institute (NRI) at Rez (

Demokratiska genvägar : Expertinflytande i den svenska lagstiftningsprocessen om medicinsk genteknik

Popular Abstract in Swedish Denna avhandling handlar om expertinflytande och demokrati och fokuserar hur politiskt beslutsfattande i frågor med stort beroende av vetenskaplig expertis bör gå till för att vara demokratiskt. Studiens övergripande syfte är att från ett demokratiskt perspektiv värdera den svenska lagstiftningsprocessen om medicinsk genteknik, som kan ses som ett fall av beslutsfattandThis dissertation is about expert influence and democracy and focuses on how political decision-making about issues highly dependent on qualified scientific expertise should come about in order to be democratic. The primary purpose of the study is to evaluate, from a democratic perspective, the Swedish legislative process concerned with medical gene technology ? an archetypal case where the decisi

Controlled pilot development unit-scale fed-batch cultivation of yeast on spruce hydrolysates

Yeast production on hydrolysate is a likely process solution in large-scale ethanol production from lignocellulose. The hydrolysate will be available on site, and the yeast has furthermore been shown to acquire an increased inhibitor tolerance when cultivated on hydrolysate. However, due to over-flow metabolism and inhibition, efficient yeast production on hydrolysate can only be achieved by well-

Laser Doppler flowmetry during hyperaemic reactions in the skin

Laser Doppler flowmetry (LDF) was used to study skin blood flow in the finger tip and on the dorsum of the hand in healthy volunteers. Vasodilatation in the finger tip was induced by immersing the arm in water at 42 degrees C, and vasodilatation in the dorsum of the hand by intracutaneous injection of dihydralazine. Simultaneous measurements were performed using venous occlusion plethysmography (f

Closure after gastrostomy button

A gastrostomy device is removed from the gastrostoma when no longer needed. The aim of the study was to test the hypothesis of whether it is possible for the surgeon to decide which stoma has to be closed with a gastroraphy and which to leave for a spontaneous closure within a reasonable period of time. Out of a cohort of 321 patients, who had been operated with a video-assisted gastrostomy, we in

On the allophonic behaviour of German /x/ vs /k/ - an EPG investigation

Facts about the phonotactics and the allophonic behaviour of German /x/ vs /k/ are summarized and discussed concerning the question of categorical vs gradual assimilation. It is concluded that the different allophonic variation of /x/ vs /k/ can more appropriately be described in terms of a difference in articulatory control rather than in assimilation. This difference is associated with a stronge

Persistent spectral hole burning from oxygen-evolving Photosystem II cores from cyanobacteria and higher plants

Persistent spectral hole burning was performed on active Photosystem II (PSII) cores from spinach and Synechocystis 6803, each containing about 32 chl a molecules per core. Hole-burning action spectra are presented. The data appear inconsistent with a mechanism involving non-photochemical hole burning, as has previously been observed in isolated PSII protein-pigment fragments. A photochemical hole

Managing pain in older persons who receive home-help for their daily living. Perceptions by older persons and care providers

Pain is a common problem for older persons who need professional help for their daily living. In this study 94 older persons (75+) in persistent pain were compared with 52 care providers concerning the pain management methods they had used/administered during the previous week and how helpful they perceived these methods to be. interviews were based on 16 items from the original version of the pai

3-D Monte Carlo-based scatter compensation in quantitative I-131SPECT reconstruction

We have implemented highly accurate Monte Carlo based scatter modeling (MCS) with 3-D ordered subsets expectation maximization (OSEM) reconstruction for I-131 single photon emission computed tomography (SPECT). The scatter is included in the statistical model as an additive term and attenuation and detector response are included in the forward/backprojector. In the present implementation of MCS, a