Cellulose can be chemically modified to produce derivatives with specific properties. Knowledge of correlations between the modification reaction, substituent distribution, origin of cellulose and properties are importaint in order to design processess so as to produce derivatives with the desired properties. This thesis describes research on newly developed analytical methods for the analysis of

Popular Abstract in Swedish Huden och slemhinnor (mukosa) fungerar som kroppens skyddsbarriärer mot yttre angrepp av mikrober, makromolekyler och toxiner och förhindrar dessa att nå inre organ. Trots ett massivt immunskydd sker de flesta infektioner på slemhinnornas ytor. I blodcirkulationen förekommer fem olika typer av vita blodkroppar, alla med olika roller i immunförsvaret. I varje blod finns Mucosal infections trigger an inflammatory response that includes the secretion of cytokines and the recruitment of neutrophils to the infected site. This thesis describes studies examining the molecular mechanisms of neutrophil migration to sites of mucosal bacterial infection. Escherichia coli (E. coli) infection of epithelial cell layers stimulates chemokine secretion and chemokine receptor ex

This study comprises three parts, each of which illustrates different aspects of insurance fraud. The three parts can be seen as independent presentations with their own research findings; but these parts may also be seen together as a whole, giving further perspectives regarding the subject of the study. Part I presents different procedures regarding insurance fraud. This part includes a survey w

The main purpose of this thesis is to analyze debates around and changes in knowledge production and medical practices of childbirth between 1960 and 1985 in Sweden. The roles of the different actors involved, such as physicians, midwives, the National Board of Health and Welfare, the women’s movement and politicians are studied in four main contexts: medical practice and debate, the Swedish Parli

This paper presents the solution to a general decentralized state-feedback problem, in which the plant and controller must satisfy the same combination of delay constraints and sparsity constraints. The control problem is decomposed into independent subproblems, which are solved by dynamic programming. In special cases with only sparsity or only delay constraints, the controller reduces to existin

Polymer dispersions are employed in a wide variety of applications as film formers. Especially in the coating-, paint-, pharmaceutical and hygiene industry polymer dispersions are to a large extent used as barriers, controlled-release agents and adhesives. Control and steering of the polymerization process has resulted in the production of core-shell structures with soft and hard (low glass transi

The objective of this work was to design and evaluate an experimental setup to be used for field studies of particle formation in biomass gasification processes. The setup includes a high-temperature dilution probe and a denuder to separate solid particles from condensable volatile material. The efficiency of the setup to remove volatile material from the sampled stream and the influence from cond

Biogas is a renewable source of energy. Residues from agriculture contain considerable energy potential and are suitable substrates for biogas production, but in Sweden the utilization of these residues is low. The economic feasibility of biogas production in general is low, and only limited subsidies are provided by the state. In the present work, the feasibility of low-temperature digestion of c

Popular Abstract in Swedish Vid det tillstånd som kallas för vattenskalle, hydrocephalus, uppstår övertryck innanför skallen på grund av att vätskan, som cirkulerar där inte kan dräneras. Redan efter andra världskriget började man sätta in shuntar för att avleda överskottsvätskan till andra hålrum i kroppen, hjärtats förmak eller bukhålan. Runt 1960 kom emellertid de första rapporterna om infektioCoagulase-negative staphyloccoci (CoNS) are the most frequently isolated micro-organisms from infected cerebrospinal fluid (CSF) shunts and temporary ventricular drainage catheters, used in modern neurosurgery. CoNS originate from the skinflora of the patient or the surgeon and gain access to the surface of the implant at the insertion, but the infection can erupt up to a year later or more. Immed

Field measurements of mercury emissions has been performed by using a mobile lidar system. In this system an Nd:YAG-pumped OPO (Optical Parametric Oscillator) laser system is employed to generate a narrow band (better than 0.2 cm-1) UV beam at the mercury resonance absorption line at 253.65 nm. An inter-comparison of the lidar system and two different point monitoring systems has been performed sh

Brief description and interpretation of the eighteenth-century altarpiece by Johan Ullberg in the church of Dalby.

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