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The release of dissolved silicon (DSi) from A and B horizons was investigated with leaching tests on unsaturated columns. As forest A horizons have larger biogenic Si (BSi) pools than arable lands, we compared the Si release from a forest and a cropland from the same geographical region developed on a Luvisol in Belgium and a Cambisol in Sweden. The A horizons released a quickly dissolving Si frac
A numerical model was developed of beach morphological evolution in the vicinity of coastal structures. The model includes five sub-models for random wave transformation, surface roller development, nearshore wave-induced currents, sediment transport, and morphological evolution. The model was validated using high-quality data sets obtained during experiments with a T-head groin and a detached bre
The aim of this study was to find models for turbulent fragmenting forces in the high-pressure homogeniser from data available in Computational Fluid Dynamics (CFD) simulations with Reynolds Averaged Navier Stokes (RANS) turbulence models. In addition to the more common RANS k-epsilon turbulence models, a Multi-scale k-epsilon model was tested since experimental investigations of the geometry impl
Pressurized Hot Water Extraction (PHWE) is a quick, efficient and environmentally friendly technique for extractions. However. when using PHWE to extract thermally unstable analytes, extraction and degradation effects occur at the same time, and thereby compete. At first, the extraction effect dominates, but degradation effects soon take over. In this paper, extraction and degradation rates of ant
The surface structure of Pd(100) during CO oxidation was measured using a combination of a flow reactor and in situ surface X-ray diffraction coupled to a large-area 2-dimensional detector. The surface structure was measured for P-O2/P-CO ratios between 0.6 and 10 at a fixed total gas pressure of 200 mbar and a fixed CO pressure of 10 +/- 1 mbar. In conjunction with the surface structure the react
In the robotic manipulation context, end-effector contact forces may be difficult to measure mainly due to the tool dynamic interferences Such as the inertial forces. In this paper, a whole methodology is proposed to estimate these forces. The new approach is based oil a sensor fusion technique that integrates the information of a wrist force sensor. of a 3D accelerometer placed at the robot tool
This study sought to elucidate Swedish pediatric wards concerning the practice of informing children and their parents about clinical examinations and procedures. A semi-structured questionnaire was distributed to all 36 pediatric departments in Sweden, comprising of 83 wards. Fifty-eight (70%) of the wards responded. The results showed that 55 (95%) of the wards provided regular planned informati
The thesis contains a general theoretical and historical argument and the application of this argument to specific empirical data gathered over a period of 23 years among young people in Iceland. The first part consists of a selective review of the international research literature on television at the time of writing. This review leads to the establishment of three stages in the development of t
In tunnels or long corridors, the combustion products of the fire are confined to spread in one or two directions, forming a ceiling-jet flow. For safety assessment and emergency treatment, it is important to investigate and understand the behavior of the ceiling-jet flow. In this paper, a simple model has been presented, in terms of Richardson number and non-dimensional ceiling-jet thickness, to
A Baeyer-Villiger monooxygenase has been identified in the genome sequence of Dietzia sp. D5. Sequence similarity search revealed that the enzyme belongs to a group of BVMOs that are closely related to ethionamide monooxygenase from Mycobacterium tuberculosis (EthA). The BVMO was expressed in E. coli BL21-CodonPlus(DE3)-RP and the best expression was achieved when the E. coli cells were cultivated
In gastronomic tourism, Slow Food has gained considerable attention. Cittáslow, a network of towns, are working with qualitative local urban development, based on similar principles as Slow Food. This article studies how destination development and destination marketing is conducted in a cittáslow context. A study was conducted in three cittáslow towns in Northern Italy. All three towns worked amb
The genes encoding human manganese superoxide dismutase (MnSOD) and Vitreoscilla hemoglobin (VHb) were fused inframe to generate a bifunctional enzyme that possessed MnSOD and peroxidase-like activities. At neutral pH, the coupling of the SOD and peroxidase reactions revealed that the bifunctional enzyme exhibited a 2.5 times shorter transient period and a 1.67 times higher reaction rate at steady
The aim of the work presented in this thesis is the improvement of xylose fermentation performance of recombinant Saccharomyces cerevisiae strains expressing XYL1 and XYL2 from Pichia stipitis, encoding xylose reductase (XR) and xylitol dehydrogenase (XDH). A recombinant strain of S. cerevisiae, fermenting both xylose and glucose to ethanol could decrease the production cost of ethanol from ligno-
Popular Abstract in Swedish SAMMANFATTNING PÅ SVENSKA Grupp B streptokocker (GBS) Grupp B streptokocker (GBS), på latin Streptococcus agalactiae, är det vanligaste fyndet vid bakteriella infektioner, som blodförgiftning (sepsis), hjärnhinneinflammation (meningit) och lunginflammation (pneumoni) hos nyfödda barn. Sjukdomsförloppet är ofta våldsamt och livshotande. Sedan 1970-talet har det skett enABSTRACT Streptococci constitute a heterogeneous group of Gram-positive bacteria, divided into different serological groups on the basis of antigenic differences in a cell wall-associated carbohydrate. This thesis describes related surface proteins expressed by bacteria in two of these groups, the group B streptococcus (GBS) and the group A streptococcus (GAS). GBS is an encapsulated bacterium th
This book commemorates the 65th birthday of Karl Johan Åström, who is professor in Automatic Control at Lund Institute of Technology. Karl Johan Åström is one of the leading researchers of the world in automatic control. The contributions are chosen to illustrate some of the areas where Karl Johan Åström has been active in his research. The idea of the papers is also to point out new directions wi
In Sweden, the combination of the country’s natural ecological vulnerability to acidification and its geographical location has been domestic focal points for the treatment of the ‘acid rain’ issue. Political interest in the acidification issue in Sweden emerged in the late 1960s, when the problems of long-range transport of sulphuric compounds and their harmful environmental effects were first hi
This thesis concerns a highly efficient nanoparticle-based capillary electrochromatography separation technique and its coupling with mass spectrometric detection. From chromatographic theory, it is well known that the separation efficiency increases with decreasing particle size. However, as the particle size decreases, the pressure required to push a liquid through the column also increases. Thi
