Impact of steam-sterilization and oven drying on the thermal stability of phenolic extractives from pine and black locust wood

The main goal of the investigation was to measure and estimate thermal stability pinosylvin, pinosylvin monomethyl ether, robinetin, dihydrorobinetin, i.e., characteristic compounds wood Scots pine black locust, respectively. pure were analyzed with chromatography before after they steam-sterilized oven-dried. Detailed thermogravimetric analysis followed check decomposition stilbenes flavonoids wood. tested phenolic susceptible degradation. After steam-sterilization oven drying, amount investigated extractives decreased by more than a half. showed that decompose differently flavonoids, which can be attributed different chemical structures. Twenty minutes steam sterilization 24 h drying in vials; however, applied treatments, robinetins stayed available such quantities still provide sufficient bioactivity.