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  1. No Access

    Article

    The selective salinity and hydrazine parameters for the start-up of non-anammox-specific biomass SBR

    The presence of ammonium (NH4+) in wastewater above the permissible limits leads to undesirable ecological impact and public health concerns. In this study, the anaerobic ammonium oxidizing (anammox) bacteria-med...

    I. Zekker, E. Rikmann, J. Oja, S. Anslan… in International Journal of Environmental Sci… (2023)

  2. No Access

    Article

    Evaluation of knot parameters measured automatically in CT-images of Norway spruce (Picea abies (L.) Karst.)

    J. Oja in Holz als Roh- und Werkstoff (2000)

  3. No Access

    Article

    The appearance of resin pockets in CT-images of Norway spruce (Picea abies (L.) Karst.)

    (L.) Karst.) was studied. The study also includes a comparison between measured and calculated CT-numbers of Norway spruce resin and wood. It was found that it should be possible to create algorithms that aut...

    J. Oja, E. Temnerud in Holz als Roh- und Werkstoff (1999)

  4. No Access

    Article

    A preliminary study on unbiased volume estimation of resin pockets using stereology to interpret CT-scanned images from one spruce log

    Stereological methods for the volume estimation of resin pockets in saw logs were studied using computed tomography (CT) and image analysis. The Cavalieri theorem was applied for transverse sections and the Pa...

    E. Temnerud, J. Oja in Holz als Roh- und Werkstoff (1998)