Sökning: "Per Ericson"

Visar resultat 1 - 5 av 15 avhandlingar innehållade orden Per Ericson.

  1. 1. Babblers, Biogeography and Bayesian Reasoning

    Författare :Magnus Gelang; Per Ericson; Per Alström; Isabel Sanmartín Bastida; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Africa; Asia; Bayesian inference; biogeography; Cettidae; dispersal; extinction; Middle East; persistence; Sylvioidea; Sylviidae; Timaliidae; vicariance; Systematic Zoology; zoologisk systematik och evolutionsforskning;

    Sammanfattning : In this thesis, I try to proceed one step further towards an understanding of the biogeographic processes forming the distribution patterns of organisms that we see today. Babblers and warblers are diverse groups of passerines that are phylogenetically intermixed with other groups in the superfamily Sylvioidea. LÄS MER

  3. 2. Osteology of the eider : Somateria mollissima (L.) : a study of sexual, geographic and temporal morphometric variation in the eider skeleton

    Författare :Per G. P. Ericson; Stockholms universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : .... LÄS MER

  4. 3. Synaptic organization of nociceptive relay nuclei in the cat and primate thalamus

    Författare :Ann-Charlott Ericson; Per Brodal; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : The fine structure of two thalamic nociceptive relay nuclei, the nucleus submedius (Sm) in the cat, and the posterior region in the owl monkey, was investigated using anatomical tract tracing techniques, immunohistochemical staining for neuroactive substances, and threedimensional reconstructions of synaptic circuitry. Ascending lamina I axons, labeled by anterograde transport of Phaseolus vulgaris leucoagglutinin, gave rise to two different types of termination in Sm: large, compact clusters of numerous boutons were predominant in the dense focus of the terminal field after a tracer injection at the site of nociceptive-specific neurons in lamina I, and boutons-of-passage type terminations were conspicuous in the periphery of a lamina I terminal field in Sm and predominant following a tracer injection at the site of thermoreceptive-specific neurons in lamina I. LÄS MER

  5. 4. Ecology of lichens in boreal coniferous forests with reference to spatial and temporal patterns

    Författare :Per-Anders Esseen; Lars Ericson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lichens; epiphytes; Alectoria; Bryoria; Cladonia; Usnea; Picea abies; Pinus sylvestris; dispersal; litterfall; succession; diversity; spatial patterns;

    Sammanfattning : The thesis deals with the ecology of lichens in two contrasting types of forest, epiphytic lichens in old Picea abies forest of the fi re-refugia type and epigeic as well as epixylic lichens in a successional sequence of fire- susceptible Pinus sylvestris forests. Results in five separate papers form the basis for a discussion of general patterns of dispersal, succession and life strategies in lichens. LÄS MER

  7. 5. Staphylococcus aureus : aspects of pathogenesis and molecular epidemiology

    Författare :Lisa Stark; Per-Eric Lindgren; Sture Löfgren; Erik Kihlström; Jan Strindhall; Andreas Matussek; Johanna Ericson Sollid; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Staphylococcus aureus is a human commensal colonizing about 30 per cent of the population. Besides, it is a frequent cause of infections such as skin, wound and deep tissue infections and also more life-threatening conditions such as pneumonia, endocarditis and septicaemia. S. aureus may also cause different toxicoses. LÄS MER