Alaska yellow cedar

The study of manoyl oxide derivatives i.e. 7 and 8 in, Fig (7), (i.e ent-hydroxy and en/-acetoxy-3(3-manoyl oxides) isolated from Cistus creticus, by GC-MS resulted in only one peak indicative of the purity of the products [33]. From the H-NMR data it is clear that the 13-epi isomer was present in both derivatives [58,139]. The chromatographic data of the compounds 7 and 8 were recently published [33,63]. Hence, investigations have proven that, apart from the 13-epi isomer, there are more isomers with varying intensities, which correspond to isomers that arise from the different configuration of C-8 chiral center [33]. This isomer showing a different configuration at C-8 has been isolated from the volatile leaf oil of Alaska (yellow) cedar and its structure has been confirmed using spectroscopic methods as well as chemical reactions [150],... 

Wood Species. The following types of conunercial lumber were obtained from Riverside Lumber Company in New Orleans, LA spruce, Picea sp, yellow birch, Betula alleghaniensis Britton, northern red oak, Quercus rubra L. redwood. Sequoia sempervirens (D. Don) mid Alaska yellow cedar, Chamaecyparis nootkatensis (D. Don). 

Termite Bioassays. Multiple choice tests were conducted using wood blocks of birch, red oak, redwood and Alaska yellow cedar where blocks were decayed by P. chrysosporium for either 3,8, or 12 wk. Bioassays were conducted using rectangular Rubbermaid storage containers (14.5 cm X 8.5 cm X 4 cm) (Consolidated Plastics, Twinsburg, Ohio). Each container served as a replicate and was filled with 100 g of sand (Standard Sand and Silica Company, Davenport, FL) moistened with 20 ml of water. Each container had four 2-cm diameter holes, one hole on each side. A 14 ml (17 x 100 mm) polystyrene round-bottom Falcon test tube (Becton Dickinson, Franklin Lakes, NJ) was inserted into each hole and sealed in place using a glue gun. The position of treatment tubes was alternated between replicates to preclude any positional effects. Two hundred termites (190 workers 10 soldiers) were placed in the center of each container. The termites were able to move freely between the container and the tubes. 

Weight Loss Due to Termite Feeding Wood consumption was greater on birch and red oak than on redwood or Alaska yellow cedar after 3 wk (Fig 1) and 8 wk (Fig 2) of decay. In the experiment where blocks were decayed for 12 wk before the feeding test was conducted, there was a significant interaction between the two factors, wood species and colony (Wood Species F = 44.9 df= 3, 80 P = 0.0001. Colony F = 3.9 df = 3, 80 P = 0.01. Wood Species Colony F = 4.4 df = 9, 80 P = 0,001). Therefore, the two factors could not be analyzed separately. However, the average wood consumption of birch was greater than that of the other three wood species overall (Fig 3a) and for each of the four termite colonies (Fig 3b). 

Alaska Yellow Cedar Experiment I (3 wk fungal decay) 0.0 0.0a... 

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