Sökning: "gunnar gunnarsson"
Visar resultat 1 - 5 av 10 avhandlingar innehållade orden gunnar gunnarsson.
1. Reproductive toxicology of endocrine disruptors : effects of cadmium, phthalates and phytoestrogens on testicular steroidogenesis
Sammanfattning : A number of investigations during the last two decades describe adverse trends in male reproductive health, which have been proposed to be caused by environmental factors with endocrine disrupting properties. In contrast to many other toxicants, endocrine disruptors often do not show linear dose-response relationships typical of those found in traditional toxicological studies. LÄS MER
2. Survival patterns and density-dependent processes in breeding mallards Anas platyrhynchos
Sammanfattning : Measuring and assessing vital rates such as births and deaths are prerequisites for understanding population dynamics. Vital rates may be affected by the density of individuals, even though the importance of density dependence on population dynamics has been debated for a long time. LÄS MER
3. Survival patterns and density-dependent processes in breeding mallards Anas platyrhynchos
Sammanfattning : Measuring and assessing vital rates such as births and deaths are prerequisites for understanding population dynamics. Vital rates may be affected by the density of individuals, even though the importance of density dependence on population dynamics has been debated for a long time. LÄS MER
4. On the occurrence and possible causes of motor neuron disease in Sweden
Sammanfattning : A series of investigations have been performed to study secular trends of motor neuron disease (MND) morbidity and mortality in Sweden, to identify time and/or space clusters, if any, and to uncover risk factors. The occurrence of the disease was estimated from incidence, prevalence and mortality rates, and the strength of various determinants was evaluated by means of the case-control approach, using population controls. LÄS MER
5. ”I don’t believe the meaning of life is all that profound” : A study of Icelandic teenagers’ life interpretation and values
Sammanfattning : What do teenagers recount about themselves and their interpretation of life and values, and what characterises individual teenagers’ perceptions and statements? What is the relation between teenagers’ life interpretation and values and social circumstances? What challenges to school religious education do the teenagers’ perceptions and statements represent? These questions are central to the study Icelandic Teenagers’ Life Interpretation and Values.The purpose of the study was to investigate some central elements in teenagers’ life interpretation so as to discuss the results in terms of social circumstances in Iceland and of school religious education. LÄS MER
