Tsuga heterophylla

Sesquilignans, lignans Tsuga heterophylla SiOj B + CHCI3 + MCjCO B + iPtjO + MeOH UV 254 nm, 366 nm Isolation 75... 

The Native Lignin from Western Hemlock Tsuga heterophylla). J. org. 

Kouwenberg LLR, Wagner F, Kurschner WM, Visscher H (2005) Atmospheric C02 fluctuations during the last millennium reconstructed by stomatal frequency analysis of Tsuga heterophylla needles. Geology 33 33-36... 

This paper is a report on preliminary studies evaluating the suitability of bark extracts from four West Coast softwood species as bonding agents for particleboard. The barks investigated include white fir (Abies concolor), ponderosa pine (Pinus ponderosa), Douglas fir (Pseudotsuga menziesii) and western hemlock (Tsuga heterophylla) ... 

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. 

Polcin and Rapson [12] have shown that hydrosulfite predominantly attacks simple quinoid, a,p-unsaturated aldehyde and anthocyanidine structures found in groundwood pulps prepared from western hemlock (Tsuga heterophylla) and eastern spruce (Picea glauca). A few years later, de Vries et al. [13,14] have demonstrated that hydrosulfite can reduce many types of aldehydes and ketones in solution according to the mechanism shown in Figure 13.1. Ketones were found to react sluggishly in water, esters are hydrolyzed, while carboxylic acids and amines are not reduced. 

Pinus tahda Loblolly pine Tsuga heterophylla Western hemlock Tsuga heterophylla... 

FIGURE 3 The relation between volumetric water content (6, m m b and suction (S, kPa) for sand and silt loam mineral soils (solid squares and line and open squares and dashed line, respectively) and humus (i.e., organic matter solid triangles and line). The sand came from the upper 0.1-m depth of soil beneath a stand of Piiuis sylvestris trees located in central Siberia (Kelliher et al., 1998), the silt loam from the 0.2-0.3-m depth of soil beneath a stand of Larix ginelinii trees in eastern Siberia (Kelliher et al., 1997), and the humus from depth 0.14 m in a 0.3-m- deep fore.st floor beneath a stand of Tsuga heterophylla and Thuja pliaita trees near Vancouver, Canada (Plamandon et al., 1975). 

C12H22O11 342.299 Structural unit in the glucomannans of plant hemicelluloses. Isol. from the partial acid hydrolysates of the glucomannans from Amorphophallus spp., white spruce (Pinus glauca), western hemlock (Tsuga heterophylla), red maple (Acer rubrum), eastern white pine (Pinus strobus), larch (Larix decidua), jack pine (Pinus bank-siana) and from Narcissus tazetta from hemicelluloses of lobolly pine (Pinus taeda) and in trace amounts from the acetolysates of the a-celluloses from white birch (Betula papyrifera) and slash pine... 

Isol. from the partial acid hydrolysates of white spruce (Picea glauca), western hemlock (Tsuga heterophylla), jute fibre, maritime pine (Pinus pinaster), aspen (Populus tremuloides) hemicelluloses. 

C12H22O11 342.299 Structural unit in the glucomannan of plant hemicelluloses. Isol. from partial acid hydrol. of Amorphophalus, spp., Picea glauca, Tsuga heterophylla, Acer rubrum and others. 

A. grandis, Cedrus libani (Cedar of Lebanon), Tsuga heterophylla (Western hemlock), Pseudotsuga menziesii. Araucaria araucana (Monkey puzzle). Araucaria heterophylla (Norfolk Island pine), Podocarpus totara (Totara), Podocarpus lawrencei (Mountain plum pine), Cupressus macrocarpa (Monterey cypress), Picea sitchensis (Sitka spruce)... 

Tsuga heterophylla LM Variation in thickness of periderm layers 54, 305, 316... 

Tsuga heterophylla Podocarpales Podocarpus spicatus Cupressales Biota... 

Sears K D, Casebier R L 1970 The reaction of thioglycolic acid with polyflavonoid bark fractions of Tsuga heterophylla. Phytochemistry 9 1589-1594... 

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