Meisterprüfung Tischler Practice Questions - Österreichische Meisterprüfung Für Das Reglementierte Gewerbe Tischler (einschließlich Holzgestalter) Exam

Oak forms obligate heartwood containing protective polyphenols (ellagitannins) and vessel-blocking tyloses (Thyllen), whereas Beech is a facultative heartwood tree (Reifholz/Farbkern) with open vessels and low fungicidal extractive content. Beech contains high concentrations of natural resins that attract wood-boring beetles, whereas Oak lacks any parenchymal carbohydrates. Oak heartwood cells undergo complete silicification (Verkieselung), creating a stone-like physical barrier against basidiomycete hyphae. Beech undergoes early sapwood dehydration which prevents the formation of wood rays, whereas Oak possesses uniseriate rays only.