摘要:
Methods for mutagenizing and selecting microorganisms with increased product tolerance are provided. Additionally, methods and systems are disclosed for culturing the microorganisms to produce products.
摘要:
A unique fabric with non-adherent characteristics making it suitable for use as a wound dressing, and particularly as a dressing for burns, is disclosed The fabric comprises cellulose acetate fibers and a siloxane finishing on the fibers. In a preferred embodiment, the dressing comprises cellulose acetate fibers, cellulose acetate fiber having an anti-biologic incorporated into the fiber resin, and a siloxane finishing on the fibers. The fabric of the invention was found to be less adherent to burns than dressings made from cotton or having a nylon net about an absorbent pad.
摘要:
The invention relates to a process for flash-spinning plexifilamentary film-fibril strands of polymers that are substantially plasticizable in carbon dioxide and/or water and have a melting point less than 300.degree. C. More particularly, the strands are flash-spun from mixtures of carbon dioxide, water and the polymer. The invention also relates to the film-fibril strands produced by the inventive process.
摘要:
A polymer composition comprising (a) 35-65 parts by weight polyvinyl chloride, (b) 10-55 parts by weight chlorinated polyethylene or chlorosulfonated polyethylene elastomer or mixtures thereof containing 24-40 weight percent chlorine, (c) 10-55 parts by weight of a chlorinated polyethylene or chlorosulfonated polyethylene elastomer or mixtures thereof containing 40-52 weight percent chlorine with the proviso that the chlorine level of the elastomers (b) and (c) differ by at least 5 weight percent, and (d) 1-30 parts by weight per 100 parts by weight of total chlorinated polymers (a), (b) and (c) of an ethylene terpolymer containing 48-74 weight percent ethylene, 20-40 weight percent vinyl acetate or alkyl acrylate wherein the alkyl group contains 1-10 carbon atoms, and 6-14 weight percent carbon monoxide. Such compositions are useful as pond liners, roofing membranes, wire and cable covering, and window profiles.
摘要:
The invention relates to an article formed by a rotational molding process, having at least one layer formed from a high molecular weight polyamide. The high molecular weight polyamide is one having a molecular weight in the range of 20,000 to 35,000 and also having an inherent viscosity of 1.05-1.60 dL/g. Rotomolded articles having a high molecular weight polyamide layer have better low-temperature impact performance compared to articles formed from lower molecular weight polyamides.
摘要:
A resiliently flexible construction beam includes a pair of lateral flange portions and a web extending therebetween, preferably, but not necessarily, so as to present a cross-sectional profile corresponding to commonly used construction beam members (e.g., 2″×4″ or 2″×6″). The resilience of the beam helps to attenuate sound transmission through the beam from one lateral member to the other. In particular, in a wall frame, beams according to the present invention are mounted at opposite ends thereof to end plates. In one example, the end plates include slits into which the webs of the beams can be received. The resilient web according to the present invention is conveniently made from a unitary piece of material such as, for example, steel.
摘要:
A wound dressing that releases, via hydrolysis and in a controlled manner, acetic acid when subjected to body temperatures and moisture, and is made from a cellulose ester substrate with a partial solvent thereon.
摘要:
Self-stabilized resin latexes are provided which contain sulfonate salts produced by basic hydrolysis of chlorosulfonated C.sub.2 -C.sub.8 alpha-olefin polymers having chlorine contents of 20-70 weight percent and sulfur contents of 1.5-10 weight percent. Further provided is a novel composition comprising a chlorosulfonated graft-modified ethylene/propylene copolymer.
摘要:
A composition for use as a binder for coating compositions containing a chlorine-containing polymer having a chlorine content of 40-75 weight percent and a number average molecular weight of 3500-40,000 and an acrylic star polymer and a low molecular weight plasticizer that is a chlorinated aliphatic hydrocarbon having a chlorine content of 20-70 weight percent or a monomeric or polymer ester having molecular weights of from 200-2500.
摘要:
A stabilized chlorinated resin latex comprising a mixture in water of A) 50-95 wt. %, based on the weight of A and B, of a chlorinated resin, substantially free of acid moieties, having a chlorine content of 15-70 wt. %, and B) 5-50 wt. %, based on the weight of A and B, of a salt of a water-insoluble C.sub.2 -C.sub.12 alpha, beta- unsaturated olefin copolymer which contains at least 2 mole % acid moieties and is compatible with the chlorinated resin.