Search for dissertations about: "Fossil"

Showing result 1 - 5 of 703 swedish dissertations containing the word Fossil.

  1. 1. Biocarbon for fossil coal replacement

    University dissertation from Luleå : Luleå University of Technology

    Author : Aekjuthon Phounglamcheik; Luleå tekniska universitet.; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biomass pyrolysis; charcoal; bio-oil recycling; CO2 utilization; reactivity; rotary drum; Energiteknik; Energy Engineering;

    Abstract : This research aims to provide a full view of knowledge in charcoal production for fossil coal replacement. Charcoal from biomass is a promising material to replace fossil coal, which is using as heating source or reactant in the industrial sector. READ MORE

  2. 2. Dating Divergence Times in Phylogenies

    University dissertation from Uppsala : Universitetsbiblioteket

    Author : Cajsa Lisa Anderson; Uppsala universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; systematic biology; divergence time; nonprametric rate smoothing; Bayesian; multidivtime; eudicots; Neoaves; monocots; dating; molecular clock; relaxed clock; age constraint; fossil; calibration; PATHd8; penalized likelihood; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi;

    Abstract : This thesis concerns different aspects of dating divergence times in phylogenetic trees, using molecular data and multiple fossil age constraints.Datings of phylogenetically basal eudicots, monocots and modern birds (Neoaves) are presented. Large phylograms and multiple fossil constraints were used in all these studies. READ MORE

  3. 3. Holocene Climate in Central and Southern Sweden Quantitative Reconstructions from Fossil Data

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Karin Antonsson; Uppsala universitet.; [2006]
    Keywords : Quaternary geology; pollen analysis; climate reconstructions; transfer functions; vegetation dynamics; Sweden; Kvartärgeologi;

    Abstract : In quantitative palaeoecology modern species-environmental relationships can be statistically modelled, and recent development has made the calibration models more statistically robust. These models are used to transform fossil assemblages to quantitative estimates of past environmental conditions. READ MORE

  4. 4. Crop production without fossil fuel

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Serina Ahlgren; Sveriges lantbruksuniversitet.; [2009]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : .... READ MORE

  5. 5. Evolutionary Progression of the Iconic Australasian Kangaroos, Rat-Kangaroos, and their Fossil Relatives (Marsupialia: Macropodiformes)

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Wendy den Boer; Uppsala universitet.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; macropodiforms; kangaroos; rat-kangaroos; fossil ancestors; post-cranial; eco-morphology; systematic; phylogeny; Earth Science with specialization in Historical Geology and Palaeontology; Geovetenskap med inriktning mot historisk geologi och paleontologi;

    Abstract : The exceptionally diverse macropodiform’s (kangaroos, rat-kangaroos and their fossil allies) currently have a fossil record that spans from the late Oligocene to the Holocene with an Australasian widespread fossil occurence. The origins of the macropodiforms are believed to have been during the Eocene possibly having split from the Phalangeridae. READ MORE