Sökning: "concentration addition"

Visar resultat 1 - 5 av 1008 avhandlingar innehållade orden concentration addition.

  1. 1. On Toxicant-Induced Succession in Periphyton Communities: Effects of Single Chemicals and Chemical Mixtures

    Författare :Tobias Porsbring; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; community ecotoxicology; toxicant-induced succession; chemical mixtures; concentration addition; independent action; diatoms; periphyton; algal pigments; algal sterols;

    Sammanfattning : This thesis deals with the effects of single chemicals and chemical mixtures on biological communities. Ecosystems are exposed to complex mixtures of chemicals, and because combination effects can occ... LÄS MER

  2. 2. Significance of transport dynamics on concentration statistics and expected mass fraction based risk assessment in the subsurface

    Författare :Veljko Srzic; Vladimir Cvetkovic; Olaf A. Cirpka; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Local scale dispersion; Heterogeneity structure; Concentration moments; Moment collapse; Expected mass fraction;

    Sammanfattning : This thesis relies on a Langrangian framework used for conservative tracer transport simulations through 2-D heterogeneous porous media. Conducted numerical simulations enable large sets of concentration values in both spatial and temporal domains. LÄS MER

  3. 3. Lung aeration and pulmonary gas exchange during general and epidural anaesthesia : Influenced by inspired oxygen concentration and diaphragm shape

    Författare :Adrian Reber; Uppsala universitet; []
    Nyckelord :Medical sciences; Anesthesia: epidural; MEDICIN OCH VÅRD; MEDICINE; MEDICIN; Clinical Physiology; klinisk fysiologi;

    Sammanfattning : Induction of general anaesthesia causes a rapid decrease in functional residual capacity, which can promote alveolar collapse (atelectasis) and airway closure in dependent lung regions. Mismatching of ventilation and perfusion (VA/Q) in the lungs is accompanied by impairment of pulmonary gas exchange. LÄS MER

  4. 4. Structural and Electrical Transport Properties of Doped Nd-123 Superconductors

    Författare :Shaban Reza Ghorbani; KTH; []
    Nyckelord :high temperature superconductors; critical temperature; resistivity; thermoelectric power; Hall coefficient; X-ray diffraction; Neutron diffraction; NdBa2Cu3O7-delta; hole concentration; substitution;

    Sammanfattning : It is generally believed that one of the key parameterscontrolling the normal state and superconducting properties ofhigh temperature superconductors is the charge carrierconcentrationpin the CuO2planes.By changing the non-isovalent dopingconcentration on the RE site as well as the oxygen content in(RE)Ba2Cu3O7−δ, an excellent tool is obtained tovary the hole concentration over a wide range from theunderdoped up to the overdoped regime. LÄS MER

  5. 5. Market structure and economic status for firms producing single-family houses in Sweden

    Författare :Fredrik Lindblad; Linnéuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wooden Houses; Wooden single-family houses; Wooden multi- family houses; Financial Performance; Risk Position; Economic distress; Z- score model; Industry Structure; Productivity; Off-site construction; Industry concentration; Maskinteknik; Mechanical Engineering;

    Sammanfattning : The gradually changing behavior of the population, towards urbanization, ledto an increased shortage of available housing. This development has resultedin a serious issue in Sweden, where too few firms are providing solutions formulti-family houses in wood. LÄS MER