Sökning: "karlsson 2012"

Visar resultat 16 - 20 av 76 avhandlingar innehållade orden karlsson 2012.

  1. 16. Carbon and nitrogen dynamics in agricultural soils : model applications at different scales in time and space

    Författare :Thord Karlsson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : An understanding of soil organic carbon (C) and nitrogen (N) dynamics is essential for efficient and environmentally sustainable agricultural production. This thesis includes model studies of C mineralization at regional/national level with annual time steps, N balances at field level with annual time steps, and N dynamics at 34 locations within a single field with daily time steps. LÄS MER

  3. 17. On nogo receptors, plasticity and lasting memories

    Författare :Tobias Karlsson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The central nervous system has very limited ability to repair itself after injury but has been shown to exhibit remarkable experience-driven structural plasticity at the synaptic level. These changes correlate strongly with behavioral performance and are thought to underlie learning and memory. LÄS MER

  4. 18. Dynamics of HIV coreceptors and their utilization by plasma and cerebrospinal fluid HIV-1 isolates

    Författare :Ulf Karlsson; Infektionsmedicin; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : HIV-1 infection of CD4+ immune cells requires the assistance of cellular coreceptors. The regulation of these receptors is highly dynamic. In addition to the major coreceptors, CCR5 and CXCR4, several alternative coreceptors mediate entry for selected HIV isolates in vitro, although their role in vivo is yet to be established. LÄS MER

  5. 19. Modification of Float Glass Surfaces by Ion Exchange

    Författare :Stefan Karlsson; Bo Jonson; Helmut Schaeffer; Linnéuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ion exchange; float glass; surface modification; surface colour; flexural strength; Glasteknologi; Glass Technology;

    Sammanfattning : Glass is a common material in each person’s life, e.g. drinking vessels, windows, displays, insulation and optical fibres. By modifying the glass surface it is possible to change the performance of the entire glass object, generally known as Surface Engineering. LÄS MER

  7. 20. Issues of Complex Hierarchical Data and Multilevel Analysis : Applications in Empirical Economics

    Författare :Joel Karlsson; Ghazi Shukur; Håkan Locking; Scott Hacker; Linnéuniversitetet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Multilevel modelling; Hierarchical modelling; Single farm payments; Part-time unemployment; Educational attainment; Performance evaluation; Economics; Nationalekonomi;

    Sammanfattning : This thesis consists of four individual essays and an introduction chapter. The essays are in the field of multilevel analysis of economic data. The first essay estimates capitalisation effects of farm attributes, with a particular focus on single farm payments (SFP), into the price of farms. LÄS MER