Wood continued

Figure 2. Enzymatic hydrolysis of autohydrolyzed aspen wood (continuous autohydrolysis)...

Figure 4. Enzymatic hydrolysis of autohydrolyzed aspen wood (continuous auto-hydrolysis), 10.0% cellulase on wood, pH 4.8,50°C, single and multi-stage...

The main disadvantage of this reaction is that 50% of the reagent is lost in the form of acetic acid adding to treatment costs. Acetylated wood continues to smell of acetic acid, corrodes metal fasteners and may cause hydrolysis of wood in the long run, if acetic acid is not completely removed. Moreover, ester bonds are labile to acid hydrolysis and the continuous presence of acetic acid in the wood is liable to reverse the reaction. Commercial systems to recover unreacted reagents and the by-products based on refrigeration system have been developed in Russia, but the cost involved is so far the limiting factor (33). 

One way to ensure that DL s are used only for valid comparisons Is to examine the specific reason for a particular DL estimation. Watters and Wood continue "To examine the validity of DL comparisons, we can pose two questions that are supposed to be answered by a DL estimate (1) Is one Instrument better than another for determining a trace analyte (2) Can an analyte be determined In a specific sample matrix using a specific method ... 

Woods continues then a sleepy Herb Anderson showed up Herb,... 

Wood remains one of the most versatile, durable and aesthetically pleasing substrates of all building materials. Whilst there have been trends in the growth and utilization of alternative substrates such as UPVC, wood continues to find favour in many applications including both structural and decorative end uses. 

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