High cellulose

Pulp type is also important and, in general, unbleached pulps are easier to size than bleached pulps. Pulps with a high cellulose content are extremely difficult to size and require as much as 10 times the amount of reacted AKD to produce similar levels of sizing to those of Kraft pulps. This effect is not easily understood and cannot be explained in terms of surface area. The presence of fillers also increases the amount of size required, and sizing efficiency has... 

The FP cellulose per unit (ml) volume and enzyme yield per unit (g) cellulose or substrate obtained on wheat straw, wood, and CTMP in SSF were higher than those obtained in LSF on wheat straw and wood (Tables I, II, and III). And wheat straw proved to be a better substrate than wood for cellulose production in SSF. This could be attributed to the polysaccharides (cellulose and hemicelluloses) of wheat straw being more readily available for the organism s growth and cellulose synthesis than those of wood. The hemicelluloses and cellulose were presumably not as available in wood, because of its high lignin content and high cellulose crystallinity, as in wheat straw. 

Lignocellulosic biomass is a valuable and plentiful feedstock commodity and its high cellulose and hemicellulose content (about 80% of total) provides considerable potential for inexpensive sugars production. However, enzymatic deconstruction of these polysaccharides remains a costly prospect. Strides in cellulase cost reduction have been made, yet further improvements are needed to reach the goal of 0.10/gal of EtOH expected to enable this new industry. Strategies to reach this goal will combine reduction in the cost to produce the needed enzymes as well as efforts to increase enzyme efficiency (specific activity). As this work proceeds, the more easily attained achievements will be made first, and thus the overall difficulty increases with time. 

Thermophilic microorganisms are able to utilize a wide range of organic wastes, such as residues from the food-processing industry (12). Paper sludge is another industrial waste with relatively high cellulose content, which could provide for an interesting feedstock after, e.g., enzymatic... 

Inhibitory Effect of Synthetic Hemicellulose-Rich Water-Soluble Fraction on High-Cellulose Consistency Hydrolysis... 

JCP Specifications. The U.S. Congressional JCP has published six government paper-specification standards for permanent-record paper (32). These specifications were written in the tradition of cotton or linen fiber, high folding endurance, and high cellulose purity as indicated by high a-cellulose content and low copper number. 

Figure 3b c. Conjugated patterns formed at relatively high cellulose concentration solvent composition, 24.5/75.5 cellulose concentration, 18g/100mL (b), 20g/100mL (c) DP, 210 storage time at 25 C, 10 days, with 1" red plate , direction of the highest refractive index of the 1 red plate. 

Another major type of natural fiber has cellulose as its main component. Cotton, flax, ramie, various hemps, and jute are the most common cellulosic materials used in making string, rope, or cloth of various weights. Wood and the many grasses are other important natural products with a high cellulose content. Any of the books on the subject will amplify the sources, preparation, and use of cellulose. 

The salient features of tension wood are summarized in Table II. Most notable are the increased volume of fibers, the high cellulose content, low lignin content, and the special wall architecture of tension wood fibers. 

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