Controlled nanocrystalline precipitation of hydroxyapatite on the surface of microfibrillated cellulose fibersKärner, Kärt; Elomaa, Matti Antero; Kallavus, Urve; Tõnsuaadu, KaiaInternational journal of recent scientific research2017 / p. 20803-20809 : ill http://recentscientific.com/sites/default/files/8807-A-2017.pdf Lignin and outer cell wall removal from aspen pulp fibres by using supercritical CO2 extractionKärner, Kärt; Elomaa, Matti Antero; Kallavus, UrveProceedings of the 9th International Conference of DAAAM Baltic Industrial Engineering, 24-26th April 2014, Tallinn, Estonia2014 / p. 372-377 : ill Rapid semi-quantitative determination of aspen lignin in lignocellulosic productsKallavus, Urve; Kärner, Kristi; Kärner, Kärt; Elomaa, Matti AnteroProceedings of the Estonian Academy of Sciences2015 / p. 105-112 : ill http://dx.doi.org/10.3176/proc.2015.1S.06 Study of the effect of mechanical treatment and supercritical CO2 extraction on aspen BCTMP by surface charge measurements and SEMKärner, Kärt; Talviste, Rasmus; Viipsi, Karin; Elomaa, Matti Antero; Kallavus, UrveCellulose chemistry and technology2014 / p. 535-544 : ill