Search for dissertations about: "Origin of life"

Showing result 1 - 5 of 219 swedish dissertations containing the words Origin of life.

  1. 1. Modelling Evolution From non-life, to life, to a variety of life

    University dissertation from Uppsala : Department of Mathematics

    Author : Yu Liu; David J. T. Sumpter; Peter Dittrich; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Mathematical biology; Biocomplexity; Artificial chemistry; Ecosystem evolution; Origin of life; Self-replication; Prebiotic evolution; Collectively-catalytic; Golden ratio; Tillämpad matematik och statistik; Applied Mathematics and Statistics;

    Abstract : Life is able to replicate itself, e.g., a microorganism is able to divide into two identical ones, and a single plant is able to forest a whole island. READ MORE

  2. 2. A class of origin The school class as a social context and health disparities in a life-course perspective

    University dissertation from Stockholm : Department of Sociology, Stockholm University

    Author : Ylva Almquist; Viveca Östberg; Michael Gähler; Bjørn Holstein; [2011]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Children; School class; Social structure; Social networks; Health inequalities; Longitudinal; SOCIAL SCIENCES Social sciences Sociology; SAMHÄLLSVETENSKAP Socialvetenskap Sociologi; Sociology; sociologi;

    Abstract : The aim of the present thesis is to examine various aspects of the school-class structure and their links to health in a life-course perspective. The empirical studies are based on two longitudinal data materials of cohorts born in the 1950s, followed up until middle age. READ MORE

  3. 3. The Origin of Tooth Replacement Three-dimensional Synchrotron Histology Visualizes the Dental Development of Silurian Stem Osteichthyans

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Donglei Chen; Per Ahlberg; Zerina Johanson; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Mechanisms of tooth replacement distribute incongruently among extant gnathostomes (jawed vertebrates): a permanent tooth-generating dental lamina exists in chondrichthyans (cartilaginous fish) and tetrapods but not teleosts, whereas tooth shedding by basal hard tissue resorption occurs in tetrapods and teleosts but not chondrichthyans. Theories about the evolution of tooth development have been biased towards the chondrichthyan conveyor-belt replacement, since there has been no fossil evidence for the origin of osteichthyan (bony fish and tetrapods) tooth replacement until now. READ MORE

  4. 4. Cellular Origin and Development of Glioma

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Nanna Lindberg; Lene Uhrbom; Bengt Westermark; Kristian Pietras; [2009]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Glioma; brain tumor; PDGF; RCAS TV-A; cell of origin; glial cell; oligodendrocyte progenitor cell; DNA repair; homology-directed repair; RAD51; angiogenesis; histidine-rich glycoprotein; MEDICINE Morphology; cell biology; pathology; MEDICIN Morfologi; cellbiologi; patologi; Molecular Medicine; molekylär medicin genetik och patologi ;

    Abstract : Gliomas are the most common primary tumors of the central nervous system believed to arise from glial cells. Invasive growth and inherent propensity for malignant progression make gliomas incurable despite extensive treatment. READ MORE

  5. 5. Origin of life : testing the isotopic resonance hypothesis

    University dissertation from Stockholm : Karolinska Institutet, Dept of Medical Biochemistry and Biophysics

    Author : Xueshu Xie; Karolinska Institutet.; Karolinska Institutet.; [2016]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Abstract : The Miller-Urey (MU) experiment provided evidence supporting the abiogenesis theory, and is considered to be the seminal experiment in the context of origin of life. The MU mixture produced in the experiment is assumed to be an essential raw material for life emergence on the primitive Earth or beyond. READ MORE