Search for dissertations about: "new subspecies"

Showing result 1 - 5 of 19 swedish dissertations containing the words new subspecies.

  2. 1. Identification of new virulence factors in Francisella tularensis

    Author : Anna-Lena Forslund; Åke Forsberg; Elisabeth Carniel; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Francisella tularensis; regulation; virulence; Hfq; DsbA; type IV pili; membrane; Molecular biology; Molekylärbiologi; molekylärbiologi; Molecular Biology;

    Abstract : Francisella tularensis, the causative agent of tularemia, is a highly virulent bacterium with an infection dose of less than ten bacteria. The ability of a pathogen to cause infection relies on different virulence mechanisms, but in Francisella tularensis relatively few virulence factors are known. Two F. READ MORE

  4. 2. Morphology, taxonomy and cladistics of southern African Anthemideae (Asteraceae)

    Author : Mari Källersjö; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This study concerns some southern African genera of the tribeAnthemideae (Astcraceae). Generic delimitations within the subtribeUrsiniinae, and the "Pentzia complex" are considerably amended.Four new genera are described, viz. Foveolina, Inulanthera,Myxopappus, and Oncosiphon. READ MORE

  5. 3. The taxonomy of the genera Dirina and Roccellina (Roccellaceae)

    Author : Anders Tehler; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Dirina and Roccellina are two lichen genera in the Roccellaceae. Both are herein monographed world wide. Thirty species, two subspecies, and six forms are recognized. The study includes detailed information on taxonomy, nomenclature, history, morphology, anatomy, chemistry, distribution and habitat. READ MORE

  6. 4. Genomic analyses of migratory divides in the willow warbler

    Author : Max Lundberg; MEMEG; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In many species of birds juveniles migrate independently of experienced adults and thus have to rely on innate information about migratory routes and wintering area. This information is encoded as a set of inherited migratory directions and a timing schedule that provides information on when and how far to migrate. READ MORE

  7. 5. Anatomy and taxonomy of cetrarioid lichens

    Author : Arne Thell; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; taxonomi; chemotaxonomy. Physiology of nonvascular plants; phytogeography; morphology; taxonomy; Systematic botany; pycnoconidia; ascus structures; anatomy; Systematisk botanik; cetrarioid lichens; Ascomycotina; Parmeliaceae; morfologi; kemotaxonomi. Växters fysiologi inte kärlväxter .;

    Abstract : The anatomy of the cetrarioid lichens (Parmeliaceae) has been studied, and the taxonomy revised. Special attention has been paid to reproductive structures, in particular the asci and pycnoconidia. Two types of asci are recognized. The Cetraria type is narrowly clavate, bears an amyloid ring structure in the tholus, and has a small axial body. READ MORE