Impact of the Solvent on the Yield of Silver Birch (Betula Pendula Roth.) Outer Bark Extractives

Proceedings of the 8th Meeting of the Northern European Network for Wood Material Science & Engineering (WSE) 2012
Aigars Pāže, Jānis Zandersons, Jānis Rižikovs, Galina Dobele, Baiba Spince, Vilhelmīne Jurkjāne, Ausma Tardenaka

Birch in the Northern hemisphere is a very widespread tree genus, which is extensively used in the furniture, pulp and plywood manufacture where, as a by-product, it accumulates birch bark (BB) in the process, which does not find industrial application, and is often burned as fuel. BB comprises about 12.5 wt.% of the tree mass. Outer BB actually consists of a mixture of pentacyclic triterpenes (35–40 wt.%) and biopolyester suberin (45 wt.%). Betulin, betulinic acid and lupeol, representatives of triterpenes, are biologically active substances, whose efficiency can be enhanced by synthetic modification. Betulin in the outer BB powder form is used in folk-medicine as an anti-inflammatory agent. Betulinic acid selectively kills human melanoma cells while leaving healthy cells intact and is found to delay the progression of the HIV 1 infection, which eventually leads to AIDS, by preventing the formation of syncytia.

Atslēgas vārdi
Outer birch bark, Flotation, Pelletization, Extraction, Triterpenes
Hipersaite
http://www.nordicforestresearch.org/wp-content/uploads/2011/03/Northern-European-Network-for-Wood-Science-and-Engineering_proceedings.pdf

Pāže, A., Zandersons, J., Rižikovs, J., Dobele, G., Spince, B., Jurkjane, V., Tardenaka, A. Impact of the Solvent on the Yield of Silver Birch (Betula Pendula Roth.) Outer Bark Extractives. No: Proceedings of the 8th Meeting of the Northern European Network for Wood Material Science & Engineering (WSE), Lietuva, Kaunas, 13.-14. septembris, 2012. Kaunas: Technologija, 2012, 100.-108.lpp. ISBN 978-609-02-0581-5.

Publikācijas valoda
English (en)