By edited by Nobuhiko Yui.
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Extra resources for Design and Applications of Hydrophilic Polyurethanes
Azollae-MPK-SK-AF-38, A. azollae-MPK-SKAM-24 and A. azollae-MPK-SK-AM-27 excreted the highest amounts of ammonia into the growth medium; under foam-immobilized conditions the ammonia production increased further. Treatment of the foam-immobilized cyanobacteria with the fungicides Bavistin and Vitavax resulted in ammonia production at significantly higher rates. Rice seedlings (var. ADT 36) grown in the laboratory in conjunction with foam-immobilized A. azollae showed increased growth. A field experiment with paddy rice and foam-immobilized A.
In these examples we will not discuss rates of elution of therapeutic efficacy. Rather, once those values are established in clinical or other studies, how does one get an appropriate amount of active ingredient into the foam? There are two basic methods to accomplish this and they will be addressed in detail when we discuss process. For now, we will simply describe them as in situ and imbibing. In the former technique, the active ingredient is included in the aqueous formulation. In the imbibing process, the foam is soaked in a solution of the active ingredient.
These were: (1) High tensile strength (2) Low protein adsorption (3) Nonuniform swelling Thus a rather complex set of design requirements was developed, qualifying it for inclusion in this book. 1 Increasing the Strength of a Dressing As we have said, the choice of hydrophilic polyurethane usually means that we sacrifice strength. In this case, however, the client was willing to decrease the absorptivity in exchange for physical strength. The dressing had to absorb, however, so hydrophilic polyurethane was the proper choice of material, but we were allowed some flexibility to diminish it.