Search for dissertations about: "Torsten Eriksson"

Showing result 6 - 10 of 10 swedish dissertations containing the words Torsten Eriksson.

  2. 6. Evolution and biodiversity of the Ixoroideae (Rubiaceae)

    Author : Kent Kainulainen; Birgitta Bremer; Sylvain Razafimandimbison; Torsten Eriksson; Sandra Knapp; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Alberteae; character evolution; classification; Condamineeae; fruit evolution; Ixoroideae; phylogenetics; pollen presentation; Rubiaceae; systematics; taxonomy; Systematics and phylogenetics; Systematik och fylogeni; växtsystematik; Plant Systematics;

    Abstract : The phylogenetic relationships within subfamily Ixoroideae of the coffee family are investigated by phylogenetic reconstruction of molecular data, including regions of the chloroplast DNA (matK, ndhF, rbcL, rps16, trnH-psbA, trnS-G, and trnT-F), and the nuclear ribosomal DNA (ITS). The evolution of morphological characters within the group are inferred, with focus on characters used in classification. READ MORE

  4. 7. Phylogeny and classification of the tribe Vanguerieae (Rubiaceae)

    Author : Henrik Lantz; Torsten Eriksson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Vanguerieae; Rubiacaeae; phylogeny; classification; morphology; ITS; trnT-F; rpl16; Biologi; Biology; Biologi; systematisk botanik; Systematic Botany;

    Abstract : Vanguerieae is a tribe in the mainly tropical angiosperm family Rubiaceae. The tribe currently comprises around 600 species in 27 genera, with the major part of the species distributed in Africa south of the Sahara. The phylogeny of the tribe was investigated using both molecular and morphological data. READ MORE

  5. 8. Systematics and polyploid evolution in Potentilleae (Rosaceae)

    Author : Magnus Lundberg; Torsten Eriksson; Jürg Schönenberger; Bengt Oxelman; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Potentilleae; Fragariinae; Potentilla; Sibbaldia; Fragaria; Alchemilla; systematics; phylogeny; polyploidy; autopolyploidy; allopolyploidy; reticulate evolution; Systematics and phylogenetics; Systematik och fylogeni; växtsystematik; Plant Systematics;

    Abstract : This thesis comprises studies of the phylogenetic relationships in the flowering plant clade Potentilleae in Rosaceae. The relationships were elucidated by using DNA sequence data from the nuclear genome as well as from the plastid genome. In particular, the focus of the studies was the investigation of allopolyploidy, i.e. READ MORE

  6. 9. Business Streamlining : Toward a Substantive Theory of the Streamlining of Outsourced Business Processes

    Author : Jonas Molin; Björn Axelsson; Lars-Torsten Eriksson; Lars-Johan Åge; Jens Hultman; Högskolan i Gävle; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Business services; Outsourcing; Grounded theory; Business Relationships; Business process; Relationship Management;

    Abstract : Research comparing public-private services outsourcing applying a longitudinal approach including the production/delivery processes (life after purchase) in services sourcing contexts is scarce. In addition, prior studies on service sourcing tend be under conceptualized. READ MORE

  7. 10. On Tool Failure in Die Casting

    Author : Anders Persson; Sture Hogmark; Jens Bergström; Torsten Eriksson; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap; materialvetenskap; Materials Science;

    Abstract : Die casting is a very cost-efficient method of forming thin-walled and complex near net-shaped products with close geometric tolerances and good surface finish. A permanent die tool is used to make large quantities of identical products. The performance and tool life are limited by several mechanisms, e.g. READ MORE