Natural Wood Durability
The relationship between chemical composition and durability in wood was first reported by Hawley et al. (1924). Some heartwood has the inherent ability to resist biological degradation, often referred to as ‘‘natural durability’’ or ‘‘decay resistance’’ (Eaton and Hale 1993). Meanwhile, the relation between extractive content of heartwoods and their fungal tolerance is well established (see recent publications: Chedgy et al. 2007; Lim et al. 2007; Mburu et al. 2007; Kusuma and Tachibana 2008). Three North American important commercial wood species, Port-Orford cedar (Chamaecyparis lawsoniana), Alaska yellow cedar (Chamaecyparis nootkatensis), and Eastern red cedar (Juniperus virginiana) are known to have significant natural durability. Cedar species have been reported to have special bioactivity against termites and wood decay fungi (Liu 2004; Gao et al. 2008). Evaluations on antifungal properties (Gao et al. 2008), biocidal application (Dolan et al. 2007), and termiticidal activities (Liu 2004) of C. lawsoniana extracts have been reported. A chemical ecological study of the components of the essential oil of J. virginiana from different habitats was performed by Setzer et al. (1992). Volatile oil from J. virginiana, consisting primarily of cedrene (a terpene) and cedral has been used in perfumery (Heide et al. 1988; Semen and Hiziroglu 2005) and as an insect repellent. J. virginiana oil has been widely used in a very broad range of products owing to its unique properties, such as odor and repellency or toxicity to many pests.
Antibiotic Activity of Cedar Extractives
To read more please visit our publication: Antifungal activities of three supercritical fluid extracted cedar oils
Todd Shupe is the President of DrToddShupe.com and is a well recognized expert on wood-based housing and wood science. Shupe worked as a professor and lab director at LSU for 18 years and Quality Manager for Eco Environmental (Louisville, KY) for 2 years. He is active in several ministries including his Christian blog ToddShupe.com. Todd is the Secretary of the Baton Rouge District of United Methodist Men, Database Coordinator for Gulf South Men, and volunteer for the Walk to Emmaus, Grace Camp, Iron Sharpens Iron, Open Air Ministries, HOPE Ministries food pantry. Todd is currently preparing to be a Men’s Ministry Specialist through the General Commission of United Methodist Men.