Filetype
The ECL cells constitute a prominent endocrine cell population in the acid-producing part of the stomach. They are controlled by circulating gastrin released from G-cells in the antrum. In response to gastrin, they secrete histamine, that in turn stimulates the parietal cell to secrete acid. The first aim of the study was to prepare isolated ECL cells of high purity and to study and identify regul
In the baking industry, emulsifiers in the alpha-gel state are used for foam formation. This thesis focuses on some parts of the effects of the emulsifier: how the foam formation and foam stability are influenced by the physical state of the emulsifier, how emulsifiers change the gelatinization and gel formation of starch, and the impact that these factors may have in a true product such as a spon
A high substrate conversion efficiency is a prerequisite for an economically feasible biohydrogen production. Caldicellulosiruptor saccharolyticus is a strictly anaerobic extreme thermophilic bacterium that is able to convert the theoretical maximum of 4 mol/mol glucose to H2. It can grow and produce H2 on a broad spectrum of sugars ranging from monomers (hexoses and pentoses) to more complex suga
Sample preparation is the most time-consuming step in an analysis. Traditional sample preparation techniques consume large amounts of organic solvents, are time-consuming and are difficult to automate. During the last decade some new extraction techniques have been developed for sample preparation and one of them is supercritical fluid extraction (SFE). This thesis focuses on sample preparation fo
The Late etruscan terracotta votive heads from Tessennano were found near a rural sanctuary about a hundred km to the North of Rome in 1956. Whereas the facial fronts are serially produced with moulds, the backs are handmade. By using not only the moulded and the handmade features but the raw material (clay and temper) as well, it has been possible to make suggestions as to how, when and where the
Contrast-enhanced magnetic resonance angiography (CE-MRA) is a diagnostic method for imaging of vascular structures based on nuclear magnetic resonance. Vascular enhancement is achieved by injection of a contrast medium (CM). Studies were performed using two different types of CM: conventional paramagnetic CM, and a new type of CM based on hyperpolarized (HP) nuclei. The effects of varying CM con
This dissertation consists of a collection of previously published or otherwise presented essays dealing with the philosophical, sociological and aesthetic writings of Theodor W. Adorno (1903-1969). The title of the dissertation is intended to cover a common programmatic theme running through Adorno's writings. Chapter one, ?Adorno and the Frankfurt school?, deals with the biography of Adorno and
Fouling is the deposit of proteins and minerals formed on equipment surfaces during the heat treatment of dairy products. The concentrations of the components and the structure of the fouling reflect the processing conditions used. The use of a higher processing temperature, e.g., ultra-high temperature (UHT) treatment, promotes a mineral-rich fouling. The fouling layer decreases the transfer of h
The function of non-vertebrate haemoglobins (Hbs) appears more diverse than that of vertebrate Hbs, possibly reflecting the various demands to be met among their hosts. Sharing structural features with other haem proteins/enzymes, Hbs display a qualitative overlap in activities with functions extending beyond oxygen transport/storage. When subjected to oxygen deficient conditions, the obligate ae
Gender remains a key predictor of vocational choice. The present thesis aimed to investigate three social psychological barriers to nontraditional career choice. Study Ӏ showed that threats to gender identity may lead to more gender-typical occupational preferences among adolescents. The results suggested a unique effect of gender identity threat, as a control threat did not have the same effect.
This thesis consists of five parts in which problems in two fields, medical and telecommunication, have been studied. In the first part, a prediction algorithm, the Prony method, for estimation of frequencies and damping factors of sinusiods is developed for a coloured noise disturbance. The method is applied to estimating a single Event-Related Potential, sERP, and the estimation principle is ev
Through the identification of a series of inscriptions, mainly datable to the Hellenistic era, a link between Aphrodite and the civic life and administration of the Greek poleis has come to light. The inscriptions in question are dedications to Aphrodite through which magistrates of various cities and varying status express their devotion to the goddess. In certain dedications, the goddess is even
The aim of this work was to achieve surface modification of two biomedical polyurethanes and one poly(urethane urea) through the addition of small amounts of amphiphilic copolymers in solution. The matrix polymers used were the poly(ether urethane)s Pellethane 2363-80AE (P80) and 2363-75D (P75) and a poly(ether urethane urea) similar to Biomer (PUUR). The amphiphilic additives consisted of segment
Positron emission tomography (PET) is a tracer technique used for quantitative in vivo studies of physiological and biochemical processes. Because of the use of positron-emitting radionuclides such as 11-C, 13-N, 15-O and 18-F, which are isotopes of the biologically ubiquitous elements, it is possible to label radiopharmaceuticals which trace biochemical processes precisely. In order to be able to
Telomeres in Chironomus consist of long complex tandem DNA repeats, which in C. pallidivittatus have been shown to extend to the extreme end of chromosomes. In C. pallidivittatus the telomeric repeats are present in large blocks, 50-200kb in size, most of them belonging to four major subfamilies. The main issue of this thesis has been to elucidate possible functional roles for these different subf
This thesis focuses on the consequences of the institutional transformations in South Africa during the 1990s with specific reference to the introduction of a mode of local governance based on the direct participation of private and civic actors in policymaking and implementation. The study also aims to contribute to theory. The approach is that public, private and civic associations are best unde
Proteoglycans consist of core proteins substituted with glycosaminoglycan chains. The galactosaminoglycans (GlcUA/IdoUA-GalNAc) and the glucosaminoglycans (GlcUA/IdoUA-GlcNAc) are both initiated on the same tetrasaccharide linkage region GlcUA-Gal-Gal-Xyl-protein. The proteoglycan decorin is bound to collagen fibrils in the extracellular matrix and is substituted with a single galactosaminoglycan
Background: Elective knee and hip arthroplasty are common surgical procedures. Improved anaesthetic and nutritional care has the potential of increasing patient satisfaction and reducing length of hospital stay (LOS). The overall aim of this thesis was to evaluate the effect of perioperative nutrition and different anaesthetic techniques on per- and postoperative outcome after elective total hip (
The male nurse is still a rare occurrence. Considerable effort has been spent on attempts at increasing the presence of women in male-dominated agentic fields and much fewer efforts have been made to increase men’s presence in female-dominated communal fields. The present study tested if the appeal of nursing for 9th grade boys (and girls) could be increased by a counter-stereotypical male role mo
