Avancerad sökning

Visar resultat 16 - 20 av 99 avhandlingar som matchar ovanstående sökkriterier.

  1. 16. Weathering of mining waste rock containing alum shale and limestone

    Författare :Erik Puura; KTH; []
    Nyckelord :;

    Sammanfattning : Geochemical processes occurring in the waste rock dumps ofan old phosphate mine, located in Maardu, northem Estonia, havebeen studied and modelled. The waste rock contains pyritic,metalliferous and organic-rich shale, as well as limestone.Production of acidity during pyrite oxidation is a potentialmechanism for heavy metal release. LÄS MER

  3. 17. Small-scale pattern and mobility of plant species in Alvar grassland

    Författare :Xiaobing Dai; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; association analysis; cattle dung; decomposition; limestone grassland; Gland; PASFRAN; soil seed bank type; Sweden; turn-around time; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; ekologisk botanik; Ecological Botany;

    Sammanfattning : Studies of the small-scale pattern, mobility of plant species and the effects of cattle dung deposition and decomposition on the soil seed banks and the above-ground vegetation were carried out in an alvar limestone grassland in Gettlinge, on the Baltic island of Öland, Sweden.A new method for pattern detection using transect data Patch Size Frequency Analysis (PASFRAN), was developed. LÄS MER

  4. 18. Cypriots in stone. Limestone sculpture in late Hellenistic and Roman Cyprus

    Författare :Maria Bruun-Lundgren; Göteborgs universitet; []
    Nyckelord :HUMANIORA; HUMANITIES;

    Sammanfattning : .... LÄS MER

  5. 19. Development of strength and heat of hydration of young concrete at low temperature : influence of granulated blast furnace slag, silica fume and limestone filler

    Författare :Monica Lundgren; RISE; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  7. 20. Slurry rheology of limestone and its effects on wet ultra-fine grinding

    Författare :Mingzhao He; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineralteknik; Mineral Processing;

    Sammanfattning : This thesis investigates rheology of limestone slurries and its effects on wet ultra-fine grinding in order to reduce energy cost and increase the throughput and the product fineness. The influences of solids concentration, molecular weight of a dispersant, particle size and distribution, and temperature on the rheological behaviours of limestone slurries have been investigated with rotational and cone-plate viscometers. LÄS MER