1. The Laboratory of Wood and Paper Chemistry, Åbo Akademi University, Porthaninkatu , Turku , Finland
2. The Laboratory of Wood and Paper Chemistry, Åbo Akademi University, Porthaninkatu 3 , Turku , Finland
3. VTT, Koivurannantie 1 , Jyväskylä , Finland
4. Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University , Espoo , Finland