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Title: Leach and mold resistance of essential oil metabolites

Source: Proceedings, one hundred seventh annual meeting of the American Wood Protection Association ... Fort Lauderdale, Florida, May 15-17, 2011: Volume 107. Birmingham, Ala. : American Wood Protection Association, c2011: p. 121-127.

Author(s)Clausen, Carol A.; Yang, Vina W.

Publication Year: 2011  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4723-4

Abstract: Purified primary metabolites from essential oils were previously shown to be bioactive inhibitors of mold fungi on unleached Southern pine sapwood, either alone or in synergy with a second metabolite. This study evaluated the leachability of these compounds in Southern pine that was either dip- or vacuum-treated. Following laboratory leach tests, specimens were evaluated for inhibition of mold growth for 12 weeks and analyzed quantitatively by GC-MS for residual metabolite(s). With the exception of geraniol, vacuum treating the specimens generally provided longer protection than dip-treating. Citronellol and carvone protected vacuum-treated specimens from mold growth for the 4-week duration of the ASTM D4445-10 test, but efficacy diminished after extending incubation beyond 4 weeks. Thymol completely inhibited mold growth for 12 weeks in both dip-treated and vacuum impregnated specimens even though GC-MS analysis showed that 49% thymol leached from the vacuum-treated specimens.

Keywords: Biodegradation; fungicides; essences; essential oils; plant extracts; antifungal agents; wood-decaying fungi; molds; metabolites; thymol; cymene; Trichoderma viride; Penicellium chrysogenum; Aspergillus niger; sapwood; leaching; citronellol; carvone; geraniol; decay fungi; resistance to decay; Southern pine; Trichoderma mold; biocides; vacuum treatment; treated wood; dip treatment

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 162 kb(s)

Date posted: 03/13/2012

This publication is also viewable on Treesearch:  view
RITS Product ID: 41634
Current FPL Scientist associated with this product
Clausen, Carol A.
Supervisory Research Microbiologist

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