Poplar wood

Pappel,/. poplar mallow, -art, /. (variety of) poplar (variety of) mallow, -holz, n. poplar (wood), -kraut, n. mallow, pappen, v.t. i. paste work in paperboard. Pappen-art, /. (paper)board. -deckel, m. = Pappdeckel. -fabrik, /. (paper) board mill, -guss, m. cast paperboard, pressboard, mill-board. -leim, m. pasteboard glue, -stiel, m. trifle. 

Militz, H. and Peek, R.D. (1993). Possibilities of improving some characteristics of poplar wood by impregnation with water-soluble resins. Material und Organismen, 28(1), 55-73. 

Lignin—Carbohydrate Complexes from Poplar Wood... 

The relationship between the viscosity of nitrocellulose solutions and the age of poplar wood cellulose according to Pascal [74], is shown in Table 45. 

Sun RC, Sun XF, Zhang SH. 2001. Quantitative determination of hydroxycinnamic acids in wheat, rice, rye, and barley straws, maize stems, oil palm frond liber, and fast-growing poplar wood. J Agric Food Chem 49 5122-5129. 

The panel used was cut from selected poplar wood to the dimensions, 6 x 12 x 1/4 inches. Two coats of paint were applied to these panels to provide a dry film thickness of 0.004 inch. 

The composition of poplar wood was usedasamodel for the feedstock composition however, as used in this simulation, the poplar is modeled as consisting of only cellulose, xylan, and lignin, with compositions of 49.47, 27.26, and 23.27%, respectively. Laboratory results for carbonic acid pretreatment are relatively scarce, so for the purpose of this comparative study, stoichiometry of pretreatment reactions was assumed to be equal to those used in the comparison model (3) cellulose conversion to glucose 6.5% xylan conversion to xylose 75 and lignins solubilized 5%. Thus, economic comparisons made with this model assess different equipment and operating costs but not product yields. For the successful convergence of the carbonic acid model, the simulation required initial specification of several variables. These variables included initial estimates for stream variables and inputs for the unit operation blocks. 

Further work in Canada to produce rigid wet-process insulation boards from a bark-wood mixture was reported by Branion in 1961 (36). He made boards containing 85% poplar wood and 15% white spruce bark a few boards were made with added poplar or jack pine bark. White spruce bark worked best it appeared to cause a significant increase in tensile strength compared to boards made from 100% poplar wood fiber. This effect also was demonstrated in a hardboard. Other boards were made with up to 80% bark. Water absorption decreased as bark content increased. An effort was made to discover the bark ingredient responsible for the strength increase. After a series of extractions, the active component was concluded to be present in the holocellulose. 

In Dr. Rea s book (see entry 328) you can also find a list of construction materials judged safe for MCS patients. The safest materials for MCS patients are, among others glass, stone, steel, ceramic, aluminum, untreated hardwood and untreated natural products. However, many kinds of wood can cause problems, particularly if the wood has been treated or impregnated, and some patients get sick from the resin which the wood may contain even when untreated. White poplar wood is very suitable for MCS patients, and is used, for example, in MCS saunas. 

The Heavenly Heat sauna is specially made for MCS patients out of white poplar wood, which does not make most MCS patients sick. It is a so-called Finnish dry sauna that is heated electrically, using stove with natural stones. The temperatures aren t as high as with a normal sauna, but that s actually better for an MCS patient and promotes detoxification. These sauna treatments can also be combined with Far Infrared therapy. 

Fig. 6.4.3a,b. Gas chromatograms of tnmethylsilylated products from a thioacidolysis of extractive free poplar wood and b poplar milled wood lignin The numbered peaks are identified in Table 6 4 2 The internal standards (IS1 and 1S2) are tetracosane and hexacosane respectively... 

In Table 6 4 3 are shown the yields of monomeric products recovered from milled wood lignin (MWL) and enzymatically liberated lignin (EL) fractions successively isolated from poplar wood and subjected to various degradation procedures (Lapierre 1986) These values reveal that acidolysis, which should allow the characterization of the same lignin structures as thioacidolysis,... 

Swedish Matches are made in Sweden almost exclusively of white poplar wood, it being the cheapest. Blocks of the length of the match are cut by machinery from the round logs and splintered, the splints kiln-dried and ooated with paraffine. The end to be covered with the inflammable compound is dipped in a solution of paraffine in benaine, when they are again dried. They are then dipped into the inflammable compound, which should... 

Milled wood lignin and enzymatically isolated lignin fractions successively isolated from extractive-free poplar wood. 

TABLE 9.10 Effects of Moisture Content of Poplar Wood Chips on Product Yield, Gas Composition, and Thermal Efficiency in a Fixed-Bed, Air-Blown, Downdraft Gasifier"... 

The process sub-models contain a sufficient level of resolution to allow all of the above areas to be examined. All parameters not referred to above are held constant throughout the study. A single "generic biomass type is considered, the data actually ctHTesponding to chipped short rotation poplar wood. 

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