Sökning: "1981"

Visar resultat 11 - 15 av 2148 avhandlingar innehållade ordet 1981.

  1. 11. On the nucleation and growth of martensite in small iron particles in copper

    Författare :Chang-Hai Li; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materialteknik; Engineering Materials;

    Sammanfattning : When thin foil specimens of copper-iron alloys containing metastable fcc - iron are bombarded with argon ions the precipitates are induced to transform martensitically to bcc iron. Using stereo microscopy techniques it was established that (1) transformation is limited to those particles near the surfaces of the specimen, (2) particles on the non-irradiated surface can transform even although the irradiation damage does not extend this deeply. LÄS MER

  3. 12. Hadronic interactions in nuclear environment

    Författare :Evert Stenlund; Partikel- och kärnfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:1981:Stenlund;

    Sammanfattning : [abstract missing].... LÄS MER

  4. 13. Brott och straff i Västernorrland 1861-1890

    Författare :Marja Taussi Sjöberg; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; HUMANIORA; HUMANITIES;

    Sammanfattning : How did people manage to survive the adjustment from an agrarian way of life to an urban and industrial one, and how did communities undergoing this transformation deal with the new problems which arose in connection with the change? These problems are studied in this work, which is about crime, criminals and the control of crime in a province in northern Sweden which changed rapidly between the years of 1861-90 as a result of the tremendous expansion of the forestry industry. It became apparent that the change from agrarian to industrial society did not lead to a brutalisation of people's behaviour. LÄS MER

  5. 14. Mercury in the Skellefte ore district

    Författare :Lennart Widenfalk; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Malmgeologi; Ore Geology;

    Sammanfattning : .... LÄS MER

  7. 15. Mitochondrial differentiation during the early development of the amphibian embryo

    Författare :Lennart Nelson; Barbara Cannon; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Amphibia; Xenopus laevis; Ambystoma mexicanum; mitochondria; differentiation; enzymes; carriers; oxidation; development; Zoophysiology; zoofysiologi;

    Sammanfattning : Mitochondria from Xenopus laevis and Ambystoma mexica- num embryos between fertilization and the beginning of feeding were studied: the former with respect to metabolic behaviour, enzyme pattern and carrier activity, and the latter with respect to morphological parameters.The metabolic behaviour of mitochondria was studied by assessing the rates of oxygen uptake in presence of various substrates. LÄS MER