Polyurethane sponge

Fig. 11. (a) Cross-sectional view of substrate with porous fibers and polyurethane sponge, (b) Cross-sectional view of substrate with bundle of microfibers... 

Havens. P.L. and Rase, H.E. Reusable immobilized enzyme/polyurethane sponge for removal and detoxification of localized organophosphate pesticide spills, Ind. Eng. Chem. Res., (1993) 32. 10, 2254-58. 

Polyurethane sponge foam. One fabricator offers a coalescer design employing an open-celled polvure-thane foam in a horizontal tank (Fig 4). 

Gordon, R., Baker, K., Askins, L., Ratcliffe, R., Lindsay, D., Owens, R. et al. (2006). Chemical warfare agents (organophosphates and vesicant) and biological decontamination and detoxification using polyurethane sponges. Toxicologist 9fS 393. 

SYNS ANDUR CURENE ETHERON ETHERON SPONGE ISOURETHANE NCI-C56451 PUOGRIP POLYFOAM PLASTIC SPONGE POLYFOAM SPONGE POLYURETHANE A POLYURETHANE ESTER FOAM POLYURETHANE ETHER FOAM POLYURETHANE SPONGE SPENKEL SPENLITE URETHANE POLYMERS... 

The U.S. Army Medical Research Institute of Chemical Defense has developed an enzyme-immobilized polyurethane sponge that can absorb chemical threat agents that can then be destroyed by enzymatic activity. These polyurethane sponges have been found to have excellent adsorption properties related to organophosphorous vapors (Lukey et al. 2004). 

Fumaric acid production using immobilized Rhizopus cells has also been studied. Petruccioli et al. [74] immobilized R. arrhizus NRRL 1526 on polyurethane sponge to carry out repeated batch fumaric acid production from glucose syrup with KOH/KCO3 as the neutralization agent and CO2 source. Although the yield (12.3 g/1) is low, it provides the possibility of using immobilized Rhizopus for the continuous production of fumaric acid. 

Polymeric sponge method were used for forming CBPM, characterised by total porosity ranging from 65 to 90% and compression strength not exceeding 2,5 MPa. Few examples of porous structure of materials formed on the base of 30, 45 and 60 pore per inch density polyurethane sponges are presented in Figure 6. 

Work simplification in total T4 by CPBA techniques has proceeded mainly by the kit approach rather than by automation, and these depend upon techniques such as Sephadex columns (H24, S7), Sephadex or Sephadex-Iike granules (Bl), fiber strips impregnated with ion exchange resin (T6), polyurethane sponge impregnated with resin (G6). For those who prefer not to be dependent upon kits there are simplified procedures to be set up in the laboratory dependent upon small Sephadex columns (B14) or ion-exchange resin strips (02). The kit approach can be combined with semiautomation, particularly of the pipetting steps (R4). 

Synonyms Isourethane Plastic sponge Polyfoam Polyurethane sponge TPU... 

Synonyms Polyfoam sponge Polyurethane ester foam Polyurethane ether foam Polyurethane sponge Urethane polymers... 

Polyurethane sponge. See Polyurethane, thermoplastic Polyurethane foam... 

MPII, and MPIII culture media (immobilized on Ca alginate, polyurethane sponge, active carbon, and pearlite) ... 

O. Aviv, N. Laout, S. Ratner, O. Harik, K.R. Kundura, A.J. Domb, Controlled iodine release from polyurethane sponges for water decontamination, J. Controlled Release 172 (2013) 634-640. 

FIGURE 11.3 Schematic illustration of probable configuration formed by foam babbles in direct contact with PDMS-hydrophobed silica antifoam trapped in pores of a hydrophobic polyurethane sponge typical of those nsed in cardiotomy reservoirs. 

Sevastianov [82] reports the preparation of an open-celled polyurethane foam chemically hydrophobed with a perfluorosiloxane as a suitable defoaming material for defoaming blood. This material was initially as effective as the same polyurethane sponge coated with a proprietary PDMS-hydrophobed silica antifoam for defoaming a solution of human albumin (supposedly the main foam stabilizing protein in blood). However, the effectiveness of the latter diminished relatively rapidly... 

Fumaric acid Rhizopus arrhizus Immobilized on polyurethane sponge [68]... 

Petruccioli, M., Angiani, E., and Eederici, F. (1996) Semi-continuous fumaric acid production by Rhizopus arrhizus immobilized in polyurethane sponge. Process Biochem., 31, 463-469. 

Superabsorbent polymers (SAPs) are polymers that can absorb and retain extremely large amounts of liquid relative to their own mass. In deionized or distilled water a SAP may absorb 50,000% its own weight of liquid, while in a 0.9% saline solution the absorbency can reach about 5000% its own weight. This compares to water absorbencies of 180%, 400%, 1050%, 1200%, and 1890% for the filter paper, facial tissue paper, soft polyurethane sponge, wood pulp fluff, and cotton balls respectively. 

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