Biological Activity surface resin

The principle of surface activation is to generate free radicals on the surface of the wood this then provides bonding sites on the wood surfaces for resin-free board production. The use of biological systems to generate surface radicals will be considered later, this section being concerned with the use of chemical systems for surface activation. 

Table 12 shows the molecular size of some biological macromolecules for comparison to the mean pore size of the resins. When selecting the pore size of a resin for the recovery or immobilization of a specific protein, a general rule is that the optimum resin pore diameter should be about 4 to 5 times the length of the major axis of the protein. Increasing the pore size of the resin beyond that point will result in decreases in the amount of protein adsorbed because the surface area available for adsorption is being decreased as the pore size is increased. An example ofthis optimal adsorption of glucose oxidase, as defined by enzyme activity, is shown in Fig. Enzyme... 

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