摘要:
The present invention relates to a method for isolating proteins from a solution containing the proteins. The invention also relates to a method for the chromatographic separation of proteins. The present invention also relates to crosslinked hydroxylic polymer particles functionalized with temperature-responsive copolymer, and to methods of preparing such particles.
摘要:
The invention relates to nanocomposites comprising of (i) hydrogels synthetized by copolymerization of N-isopropylacrylamide and/or acrylamide and/or acrylic acid monomers and of (ii) layer silicates, and to the process for preparing them. The invention covers osmotically active hydrogel expanders containing said nano-composites, suitable for tissue expansion and the use of said materials for obtaining live skin.
摘要:
In the mounting of a membrane (13) in a fuel cell, there is a great risk of damages to the membrane and problems in the sealing between membrane and electrodes occur easily. These problems have been eliminated by in situ moulding of the membrane (13) in the cell. For a cell of DMFC type, a monomer such as acrylamide can be admixed with a sulfonic acid, preferably p-chlorobenzene sulfonic acid. As a cross-linking agent, N, N' -methylene-bis- acrylamide is suitably used in combination with N,N,N',N'- tetramethylene diamine and the setting reaction is initiated by a peroxo salt, suitably ammonium persulfate. As an alternative, the membrane (13) is moulded from a soda glass melt, after which the the soda is dissolved out by acid. The membrane (13) can also be moulded from water glass admixed with titanium dioxide and after the neutralisation of the mixture the water is removed, whereby the molecules arrange themselves to form a silica net, a silica gel.
摘要:
Gels, such as polyacrylamide gels, are provided that include linear polyacrylamide in the stacking gel. Native gels that include linear polyacrylamide in the stacker can be used to separate biomolecular complexes, such as protein complexes. Gel cassettes in which the gap width between front and back plates does not vary by more than 5% at the upper edge of the cassette are also provided. The gel cassettes can be used for electrophoretic separation of proteins and protein complexes on native gels, such as native gels that include linear polyacrylamide in the stacker. The native gels can have multiple wells for electrophoresing at least one sample and/or at least one molecular weight standard.
摘要:
A stable aqueous suspension of water-soluble polyacrylamide particles is in a saturated solution of an ammonium salt. The polyacrylamide particles are characterized by a particle size of about - 150 mesh, and preferably - 270 mesh, with - 400 mesh most preferred. The suspension is at least about 2.5 % by weight polyacrylamide. When the ammonium salt is ammonium sulfate, PAM concentrations as high as about 15 % by weight can be achieved while still being easily flowable. The suspension is made by stirring the small particle PAM into the saturated ammonium salt solution. The PAM can be quickly dissolved to form a less concentrated PAM solution by adding the suspension to water or to a dilute solution, which can include calcium salts or other soil enhancers.
摘要:
The present invention generally relates to thermally responsive polymer gel compositions that have enhanced temperature-dependent shrinking rates, increased strength, and improved pliability over previously known polymer compositions. In particular, the compositions are thermally responsive polymer gel compositions comprising a hydrophobic polymer matrix and an interpenetrating hydrophilic polymer network disposed therein, such that the resulting polymer gel composition has enhanced thermal responsiveness relative to the hydrophobic polymer matrix alone. This combination results in polymer gels having these improved properties. In a particular aspect, the hydrophobic polymer matrix is poly(n-isopropylacrylamide) ("PNIPAAM") and the interpenetrating polymer network is supplied by incorporation of an amount of protein, typically gelatin, within the PNIPAAM. The compositions of the invention find particular use in surgical applications for the repair of damaged tissues, e.g., blood vessels, neurons, and the like, and in temperature-dependent drug delivery systems.
摘要:
The present disclosure relates to a novel aqueous composition of a structurally modified, water soluble polymer suitable for papermaking and to a method for manufacturing it. The method comprises cleaving a backbone of the acrylamide polymer by a degradation agent and cross-linking the acrylamide polymer subjected to cleaving by using a polyfunctional cross-linking agent.
摘要:
Provided are a pickering emulsion including: 0.01 - 20 wt% of particles having an average particle diameter of 10 nm - 100 μm, and 0.01 - 20 wt% of a non-ionic water-soluble polymer, wherein the particles are positioned on an oil droplet surface, and a method of preparing the same.
摘要:
A polymer substrate, such as a polymer particle, is formed from a carboxyl functional monomer. In an example, the carboxyl functional monomer has a protection group in place of the OH of the carboxyl group. Once the monomer is polymerized, such a protection group can be removed, providing a polymer network with carboxyl functional sites. Such sites can be used to attach other functionality to the polymer substrate.