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Selenium is a micronutrient that is essential for many important life processes due to the action of the specific selenoproteins containing one or more of the 21st amino acid, selenocysteine. Twenty-five selenoprotein genes have been found in the human genome but the function of many of them is not yet known. Some of the characterised selenoproteins have, however, antioxidant properties. Selenium
Professor I am Office director for Astrophysics and Topic Responsible for Astronomy and Astrophysics at Lund Universtiy. My field of research is stellar spectroscopy. My main interests deal with the origin of the inner bulge of the Milky Way and the Galactic Center regions. This is performed by investigating stars at high spectral resolution in the near-IR. A red thread through my research projec
https://www.astro.lu.se/~ryde - 2026-10-26
This thesis contains four empirical macroeconomic studies and the papers may briefly be summarized as follows. In the first paper, we use both descriptive statistics and regression analysis to investigate whether movements in real exchange rates and money supply before and during fiscal contractions matter for the macroeconomic outcome. First we define fiscal contraction. Second, we label the cont
Symbolic politics is the degree to which political decision-making is motivated, not by the tangible aspects of the decision, but by the interpretation of what the decision represents symbolically. While symbolic politics is widely recognized as an important aspect of political decision-making, the phenomenon is insufficiently explored in political science. The first aim of the present dissertatio
The overall interest pursued in this thesis is how the former socialist economies of Central and Eastern Europe can build strong and dynamic systems of innovation. The purpose of the thesis is to investigate the dynamics and evolution of the telecommunications system of innovation in Estonia from the late Soviet period to Estonia's EU accession, and to provide an in-depth explanation of how innova
Parasitic plants are found in nearly every major terrestrial ecosystem and can be divided into two groups, holoparasites (lacking chlorophyll) and hemiparasites (chlorophyllous). The host-parasite connection is either situated above (stem parasites) or below ground (root parasites). In this thesis I examine the host-parasite interactions, host range and selection, and population dynamics of four r
Intraabdominal adhesions are formed after most operations and a limited number of studies have to examine the long-term spectrum of adhesion-related disorders and the cost associated with this. Only a few numbers of antiadhesive agents are available which, however, do not decrease the actual morbidity that follows intraabdominal adhesions, such as small bowel obstruction, infertility and pain. Fut
The aim of this thesis is to study effects of an extension of physical education/activity and motor training on motor skills, attention and cognition during a period of three years. Another aim is to develop a test, MUGI observationsschema, which could be useful in charting motor skills of school pupils. The study has two intervention groups (n=152) that have physical activity and motor training o
Type 2 diabetes is characterised by defects in insulin sensitivity, insulin secretion and increased endogenous glucose production. The relative contribution of each of these defects remains controversial. In order to characterise the metabolic defects in various stages of glucose tolerance, the insulin sensitivity and insulin secretion was measured in a large population based study in Finland and
Renewable energy sources dominated the world energy supply until the beginning of the 20th century, when fossil energy became the dominant energy source worldwide. Today, fossil fuels contribute to over 80% of world energy supply. But there are two major reasons why fossil energy use has to stop. First, fossil energy is limited and will not last forever. Second, emissions of carbon dioxide change
This dissertation investigates the realism in people's confidence judgments. Study I investigated whether mood influences the confidence people have in their event memory. However, there were no significant differences in the realism of the participants' confidence judgments between conditions (elated and neutral). This study concluded that moderate levels of elation might not influence the realis
Forests are of major importance to climate change mitigation due to their strong capacity to sequester carbon. Nearly half of the terrestrial carbon is stored in forests, and forests contribute to half of the terrestrial primary productivity, with forests in the mid- and high latitude ecosystems as major contributors. These high latitude forests are, however, projected to be strongly influenced by
