This dissertation represents the conclusion of the author's PhD project on supercritical wood impregnation. It feels like I started the project last week, but obviously it's been considerably longer. Time flies when you're having fun-and certainly also when you're doing a PhD. I want to thank my supervisor Claus Felby for guidance and helpful criticism along the way. Ole Henriksen from Hampen Traeforarbejdning A/S deserves special praise for his patience in teaching me about the interesting world of supercritical fluids, which was practically unknown to me before this project began. I also want to thank him for countless hours of interesting conversation, and for his help and support in times of personal trouble. I'm grateful to Dr. Monika Johannsen for kindly receiving me at the lab at the Hamburg University of Technology and for her contributions to the work on wood-biocide interactions. Likewise, I'm grateful to Dr. Jeffrey Morrell and the rest of the staff at the wood science lab at Oregon State University for receiving me at their lab. My colleagues at Department 4 at Forest and Landscape and the people at Hampen Traeforarbejdning also deserve credit for helping me out whenever needed. I want to thank Milo Clauson at Oregon State University for his professional help in the supercritical lab and, more importantly, for his endless hospitality, his always helpful nature and for being a good friend. Without the help of all these people, this project could not have been completed. Y para Yohanna-la musa de mi inspiración-gracias por todo. The project has been supported by the Danish Forest and Nature Agency and Hampen Traeforarbejdning A/S to whom I'm grateful.

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Short rotation plantation forests in Tasmania, Australia, are dominated by Eucalyptus nitens (common name: shining gum). These forests were primarily planted to provide material for pulp and paper production, but the timber is increasingly sought after for higher value and more enduring applications.