Thuja plicata

Fig. 3.5 Compounds 273-275, terpenes from Thuja plicata. Compounds 276 and 277, sesquiterpenes from Ambrosia psilostachya...

Chan-Yeung, M., Giclas, PC., and Henson, P.M., Activation of complement by plicatic acid, the chemical compound responsible for asthma due to western red cedar (Thuja plicata), J. Allergy Clin Immunol., 65, 333, 1980. 

Chan-Yeung M, et al Occupational asthma and rhinitis due to Western red cedar (Thuja plicata). Am Rev Respir Dis 108 1094-1102, 1973... 

Another example is illustrated in Figure 9 (27). The outer, sap-wood rings of a western redcedar, Thuja plicata Donn, which grew about 50 miles south of Seattle, show an increase in 14C which lags slightly behind the levels of 14C which prevailed in the atmosphere. This lag is attributed to a holdover of food supply from the previous year a sizeable... 

Thujaplicin (= Hinokitiol Thuja plicata, Cupressus sargentii, 5-LOX, 12-LOX, SLOX,... 

Fujita, M., Gang, D.R., Davin, L.B. and Lewis, N.G. (1999) Recombinant pinoresinol-lariciresinol reductases from western red cedar Thuja plicata) catalyze opposite enantiospecific conversions. /. Biol. Chem., 274, 618-27. 

Kim, M.K., Jeon, J.H., Fujita, M., Davin, L.B., Lewis, N.G. (2002b) The western red cedar (Thuja plicata) 8-8 DIRIGENT family displays diverse expression patterns and conserved monolignol coupling specificity. Plant Mol. Biol, 49,199-214. 

Limonene inhibiting pine larva parasites feeding (Diprian pini and Dendrolymus pini) [103]. The (+)-3-thujone and (-)-3-isothujone, the main components of Thuja plicata leaves, inhibit the feeding of Pissodes on needle trees [102]. Enzymatic mechanism explaining the olfactory processes are the reasons for eliciting responses between the optical isomers and the receptors. 

Figure 1.3. The softwood Thuja plicata. Tracheids function in both sap conduction and stem support in softwoods. A growth ring is clearly visible with the thicker-walled latewood tracheids to the top left, and the thinner-walled and larger lumened early-wood tracheids to the lower right, x 275.

In kraft pulping the substitution of Thuja plicata for western hemlock, Tsuga heterophylla, led to increased digester corrosion (Gardner and Hillis, 1962). It was shown that steam-volatile tropolones known as thujaplicins were responsible for corrosion at the top of the digesters, and that polyphenols with a catechol group, which have a tendency to complex with iron, were responsible for the remainder of the corrosion. 

Eucalyptus regnans is the classic example of a eollapse-prone timber. Once eonsidered suitable only as fuelwood, today it is in demand for flooring, furniture and in other prestige items. Collapse-prone timbers inelude eertain other eucalypts, oak (Quercus sp.), black walnut Juglans nigra), western red eedar Thuja plicata) and redwood Sequoia sempervirens). 

Thuja gigantea Nutt. (= Thuja plicata Donn ex D. Don)... 

Feist (20) and Williams ( ) have used xenon arc accelerated weathering to determine the efficacy of surface treatments of wood. The degradation of the surface is manifest as erosion and can be measured microscopically (2). In recent work at the Forest Products Laboratory (22), these techniques were used to determine the effect of acid treatment on the erosion rate of western redcedar (Thuja plicata Bonn ex D. Don). 

Western red cedar (Thuja plicata) Carpenter, construction, 6 ... 

CHAN-YEUNG, M MACLEAN, L. PAGGIARO, P.L. (1987) Follow-up study of 232 patients with occupational asthma caused by western red cedar (Thuja plicata). Journal of Allergy and Clinical Immunology, 79, 792-796. 

PAGGIARO, P.L. CHAN-YEUNG, M. (1987) Pattern of specific airway response in asthma due to western red cedar (Thuja plicata) relationship with length of exposure and lung function measurements. Clinical Allergy, 17, 333-339. 

CHAN-YEUNG, M. MALO, J.-L. (1993) Table of the major inducers of occupational asthma, in BERNSTEIN, I.L., CHAN-YEUNG, M MALO, J.-L. BERNSTEIN, D.I. (Eds) Asthma in the Workplace, pp. 595-624. New York Marcel Dekker. CHAN-YEUNG, M., LAM, S. KOENER, S. (1982) Clinical features and natural history of occupational asthma due to western red cedar (Thuja plicata). American Journal of Medicine, 72, 411—415. 

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