Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Eucalyptus wood

The editor has been told that air can be explosive in its own right in a eucalyptus wood on a hot day, and, having smelt one, does not find this absolutely incredible. Explosive air is sometimes also found in caves and mines when decaying vegetable matter is present. [Pg.31]

Unlike starch or cellulose, BSG hemicellulose has a complex structure, which is still present, in part, on its autohydrolysis products. Oligosaccharides from BSG hydrolysis consist mainly of branched arabino-xylo-glucurono oligosaccharides that are not highly acetylated when compared to other xylans, such as from Eucalyptus wood (31). The action of several enzymatic activities including endo-l,4-P-xylanase P-xylosidase and accessory activities such as acetyl xylanesterase, a-glucuronidase, and a-arabino-furanosidase is therefore required for the complete hydrolysis of OCL to monosaccharides. [Pg.1047]

The total monosaccharide composition of OCL acid posthydrolysate is approx 26 g/L of monosaccharides, with a ratio of 2 5 3 for glucose xylose arabinose. Compared to other hydrolysates, it has higher arabinose but lower xylose contents than rice straw (37), sugarcane bagasse (38), Eucalyptus wood (16), and corncobs (36), where the latter two hydrolysates were also obtained in a similar two-step procedure. Nevertheless, the total monosaccharide content is in the same range, e.g., as rice straw, Eucalyptus wood, or corncobs. [Pg.1051]

Although this compound has not yet been identified in the Eucalyptus wood fed upon by N. exitiosus, it has been isolated from Indian incense cedar Commiphora mokul (28). Thus, as in the case of R. flavipes, the compound reported to be the trail pheromone of exitiosus may represent a plant natural product. [Pg.208]

Table 2.2.4. Lignin contents of P radiata and Eucalyptus woods and pulps obtained by various methods... Table 2.2.4. Lignin contents of P radiata and Eucalyptus woods and pulps obtained by various methods...
Pindoria, R.V. Megaritis, A. Messenbfick, R.C. Dugwell, D.R. Kandiyoti, R. (1998). Comparison of the Pyrolysis and Gasification of Biomass Effect of Reacting Gas Atmosphere and Pressure on Eucalyptus Wood. Fuel, 77, 1247-1251. [Pg.356]

Kumar M, Gupta R.C. (1997). Influence of Carbonization Conditions on the Pyrolytic Carbon Deposition in Acacia and Eucalyptus Wood Chars. Energy sources. 19,295-300. [Pg.1631]

The used BSG hydrolyzate conqjosition is shown in Table 2. It has approximately 26 g F of monosaccharides and a low level of microbial inhibitors, specially aliphatic acids, and furan derivatives compared to similar hemicellulosic hydrolyzates used for SCP production, e.g., eucalyptus wood [28] and sugar cane bagasse [7,8]. Also, it has a low content of phenolic compounds. Crude protein has a concentration of about 1.2 g F. Much of this nitrogen (about half) is in ammonia form, the rest as amino acids (data not shown). [Pg.631]

Spiridon, 1. (2013). Influence of accelerated weathering on the properties of pol3q)ropylene/polylactic acid/eucalyptus wood composites, 18(4], 315-327. [Pg.393]

There are varieties of wood species categorized as either hardwood or softwood. Hardwood and softwood are not based on their respective hardness or sofmess but are based on their origin of sources from the types of plant they come from. Eucalyptus wood is termed as hardwood derived from broad-leaved trees, whereas wood from coniferous pine trees is called softwood. The microstructure, initial moisture content, and physical properties such as density, permeability, and diffusion coefficients are different for both wood types. Thus, their drying properties are different. The typical drying times of eucalyptus hardwood are in the order of weeks and months, whereas softwood such as radiata pine can be dried within several hours or in a day in an industrial kiln. A relatively recent textbook covers the various aspects of industrial kiln drying of timber (Keey et al., 2000). [Pg.1232]

In an attempt to produce CMF under milder reaction conditions, Gao et al. described an aqueous-organic biphasic reaction system where a combination of concentrated HCI (37%) and H3PO4 (85%) were used in the aqueous phase with chloroform as the extracting solvent at only 45°C [125]. CMF was obtained in 47% isolated yield from fructose, although glucose and cellulose gave poor yields of CMF, 7.3% and 7.8%, respectively. Surprisingly, CMF yields up to 31% were obtained when cellulosic feedstocks (e.g., eucalyptus wood) were used. [Pg.56]

Figure 9.12 HPSEC on styragel of the acetylated lignin degradation products obtained after thioacidolysis of spruce, birch and eucalyptus wood respectively. Figure 9.12 HPSEC on styragel of the acetylated lignin degradation products obtained after thioacidolysis of spruce, birch and eucalyptus wood respectively.
Figure 15.8 Tensile strength and equilibrium water uptake of TPS reinforced with Eucalyptus wood pulps (a-c) Kraft pulp (b-d) thermomechanical pulp. Reproduced with permission from Reference [147]. Figure 15.8 Tensile strength and equilibrium water uptake of TPS reinforced with Eucalyptus wood pulps (a-c) Kraft pulp (b-d) thermomechanical pulp. Reproduced with permission from Reference [147].
Tancredi, N., et al., Activated carbons from Uruguayan eucalyptus wood. Fuel, 75( 15), 1701-1706 (1996). [Pg.1045]

Tancredi, N. Cordero, T.. and Rodriguez-Mirasol, J., Activated carbons from eucalyptus wood Influence of the carbonization temperature, Sep. Sci. Technol., 32(6), 1115-1126 (1997),... [Pg.1048]

Composites containing both pine needles and eucalyptus wood particles exhibited superior mechanical properties to the composites made only with the pine needles when these were used with the composite adhesive system monomer isocyanate for pretreatment and isocyanate prepolymer for particle-particle bonding (Chauhan et al. 2013). [Pg.474]


See other pages where Eucalyptus wood is mentioned: [Pg.33]    [Pg.23]    [Pg.139]    [Pg.132]    [Pg.33]    [Pg.2217]    [Pg.70]    [Pg.59]    [Pg.181]    [Pg.347]    [Pg.110]    [Pg.326]    [Pg.60]    [Pg.34]    [Pg.381]    [Pg.565]    [Pg.113]    [Pg.406]    [Pg.37]    [Pg.6]    [Pg.7]    [Pg.304]    [Pg.47]    [Pg.214]    [Pg.336]    [Pg.23]    [Pg.182]    [Pg.1014]    [Pg.447]   
See also in sourсe #XX -- [ Pg.110 , Pg.112 , Pg.118 ]




SEARCH



© 2024 chempedia.info