Sökning: "Per-Arne Karlsson"

Hittade 3 avhandlingar innehållade orden Per-Arne Karlsson.

  1. 1. Järnbruken och ståndssamhället : institutionell och attitydmässig konflikt under Sveriges tidiga industrialisering 1700-1770

    Författare :Per-Arne Karlsson; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Iron industry; History; Sweden; Järnbrukshistoria; Sverige; 1700-1770; Industrialismen; Ståndsväsen; Bergsbruk;

    Sammanfattning : The present dissertation treats the problem of the stagnation of the Swedishiron industry during the 18th century. After a long period of expansionduring the 17th century, the parliament forbade a further enlargement ofbar iron production from the mid-18th century. LÄS MER

  3. 2. Defining the role of CD47 and SIRPα in murine B cell homeostasis

    Författare :Shrikant S Kolan; Per-Arne Oldenborg; Mikael Karlsson; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; B cells; CD47; SIRPα; Follicular B cell; Marginal zone macrophages; immunologi; Immunology;

    Sammanfattning : B cell development is a highly organized process, which commences in the fetal liver during embryogenesis and in the bone marrow (BM) after birth. Surface IgM+ immature B cells emigrate from the BM via the blood stream to the spleen and finally differentiate into conventional mature follicular B (FoB) cells and marginal zone (MZ) B cells. LÄS MER

  4. 3. Lake bathymetry as driver of salmonid population size structure and biomass

    Författare :Sven Norman; Pär Byström; Karin A. Nilsson; Jan Karlsson; Per-Arne Amundsen; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lake bathymetry; habitat-specific resource production; ontogenetic niche shifts; size structure; Arctic char; brown trout; populationsbiologi; Population Biology; Limnology; limnologi; zooekologi; Animal Ecology;

    Sammanfattning : Most fish species undergo ontogenetic niche shifts from feeding on pelagic zooplankton, to larger benthic invertebrates and in some cases also to fish. These ontogenetic niche shifts have strong impact on the interactions within and between species, with effects on individual growth, population abundance and food web dynamics. LÄS MER