Sökning: "critical pore diameter"

Hittade 4 uppsatser innehållade orden critical pore diameter.

  1. 1. Influence of cropping and fertilization on soil pore characteristics in a long-term field study

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :David Nimblad Svensson; [2020]
    Nyckelord :X-ray CT; soil structure; biopores; connectivity;

    Sammanfattning : Soil porosity, pore size distribution and pore characteristics such as connectivity are important for a range of soil processes including ease of root growth and air and water transport. The pore structure is therefore an important part of soil fertility. LÄS MER

  3. 2. In Situ Fabrication of Nanoporous Alumina into a Microwell Array

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Puja Romulus; [2018]
    Nyckelord :;

    Sammanfattning : Existing method for the antibiotic susceptibility test (AST) requires 2-3 days to produce the result. For patients with urinary tract infection (UTI), this lengthy process is critical because they must bear the pain during this period. LÄS MER

  4. 3. Quantifying relationships between X-ray imaged macropore structure and hydraulic conductivity

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Muhammad Arslan Ahmad; [2016]
    Nyckelord :critical pore diameter; modelling; pedotransfer functions; physics based approaches; SoilJ; 3-D visualization; soil characterization;

    Sammanfattning : Computer based simulation models which estimate hydraulic properties of soil usually make use of statistical approaches such as multiple regressions that relate hydraulic properties to widely measured soil properties like textural fractions, organic matter content and bulk density. The problem is that hydraulic properties are usually only weakly correlated to these properties, because it is more strongly dependent on the characteristics of larger pores in the soil. LÄS MER

  5. 4. What is the impact of entrapped air on the measurement of saturated hydraulic conductivity of soil?

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Maryia Babko; [2016]
    Nyckelord :air bubbles; vacuum saturation; X-ray computed tomography; the constant-head method of Ks measurement; standard laboratory method of saturation; critical pore diameter;

    Sammanfattning : X-ray computed tomography was applied to investigate the influence of entrapped air on standard laboratory measurements of saturated hydraulic conductivity Ks in five soil samples. The investigation consisted of five X-ray scans for each sample. Soil samples were saturated by the standard laboratory method from the bottom at the first step. LÄS MER