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Background: Contact allergy to aluminium has been reported more frequently in recent years. It has been pointed out that positive patch test reactions to aluminium may not be reproducible on retesting. Objectives: To investigate possible variations in patch test reactivity to aluminium over time. Methods: Twenty-one adults, who had previously reacted positively to aluminium, were patch tested with

We consider designing demodulators for linear vector channels that use reduced-size trellis descriptions for the received signal. We assume an iterative receiver and use interference cancellation (IC) with soft-information provided by an outer decoder to mitigate the signal part that is not covered by a reduced-size trellis description. In order to reach a trellis description, a linear filter is a

Movement data are analyzed to elucidate principles of articulator coordination. Procedures for tracking articulator gestures from x-ray motion films, and results obtained from Swedish and Bulgarian work are reported in Wood [J. Phon. 19, 281–292 (1991), Proc. 3rd Congress I.C.P.L.A., 191-200, Helsinki (1994), Proc. 13th I.C.Ph.Sc., Vol. 1, 392–395, Stockholm (1995), J. Phon. (in press)]. Coarticul

The flame propagation in a spark-ignition engine has been studied using laser-induced fluorescence (LIF) of species formed during the first ignition stage of hydrocarbon combustion. The detected two-dimensional LIF images showed the distribution of unburned regions. For the excitation, two Nd:YAG lasers operating at 355 mn were used for two consecutive measurements within the same engine cycle wit

A laboratory procedure is described for measuring methane potentials of organic solid waste. Triplicate reactors with 10 grams of volatile solids were incubated at 55 degreesC with 400 ml of inoculum from a thermophilic biogas plant and the methane production was followed over a 50-day period by regular measurements of methane on a gas chromatograph. The procedure involves blanks as well as cellul

The influence of subphase characteristics (ionic strength, pH, and the presence of bridging cations) on the conformation and lateral orientation of the hydrophobic polypeptide poly-(L)-leucine (p-leu) has been investigated at the air-water interface with the surface film balance technique as well as with Brewster angle microscopy (BAM). In addition, Langmuir-Blodgett films of p-leu deposited on qu

The deactivation of a commercial selective catalytic reduction (SCR) catalyst of type V2O5−WO3/TiO2 has been studied in this work through comparisons of results from a full-scale biomass combustion plant with those from laboratory experiments. In the latter, the catalyst was exposed to KCl, K2SO4, and ZnCl2 by both wet impregnation with diluted salt solutions and deposition of generated submicrome

Popular Abstract in Swedish Läkemedel kan sprutas direkt i ytliga blodkärl genom en så kallad perifer venkateter (PVK). Sådan behandling kallas för intravenös. När läkemedel ges intravenöst orsakar de ibland inflammation i den ven där de sprutas in, vilket kan medföra en ytlig blodpropp i kärlet. Denna biverkning kallas ofta för tromboflebit, men i denna avhandling kallas detta tillstånd för infus

Psalm studies at the end of the twentieth century bear witness of a major paradigm shift. Recent research no longer treats the Book of Psalms as a loosely assembled hymnbook with no overarching organization, but rather as a book that got its present shape through careful editing. In recent years an increasing interest in the arrangement of the Book of Psalms has produced a substantial volume of li

Most nuclear reactors, both in Sweden and worldwide, are enclosed by a prestressed concrete containment. The main purpose of the containment is to prevent any radioactive discharge to the environment in the event of a major internal accident. The performance and structural integrity of the containment depends on the compressive stresses induced in the concrete by the prestressing system. However,