870results about "Gel preparation" patented technology

The invention provides fabricated hydrogels, hydrogel particles, hydrogel containing compositions, and methods of making the same. The invention also provides methods of implanting, injecting, or administering the hydrogels, hydrogel particles, or the hydrogel containing compositions to treat a subject in need. Methods of crosslinking pre-solidified or pre-gelled hydrogel particles and making crosslinked hydrogels, crosslinked hydrogel particles, and crosslinked hydrogel containing compositions also are disclosed herein.

A method of making a novel composition of a porous medium comprising volume elements of both voids and pores wherein the voids are much larger than the mean size of the pores. The method includes a first step of preparation of a porous medium comprising solid particles the approximate size selected for the voids and pores as volume elements and a second step of removing the particles by etching out with hydrofluoric acid or other means to form a porous medium comprising both voids and pores. In another embodiment, the voids are prepared from Bow etching out of a polymeric hydrogel silica particles which were allowed to self-assemble as a crystalline colloidal array prior to formation of the polymeric hydrogel around them, thereby forming a porous medium containing a crystalline colloidal array of voids containing aqueous solution. In another embodiment, a method of partitioning macromolecules between a solution comprising the macromolecules, and the voids and pores of a porous medium. The method includes partitioning of macromolecules between voids, pores and the adjacent solution as used in chromatography, electrophoresis, filtration, extraction, other separation process, drug delivery devices, timed-release devices, and semi-homogeneous catalytic reactors. In another embodiment, a method of using Bragg diffraction for detection and monitoring partitioning of macromolecules in the voids comprised in a porous medium comprising a crystalline colloidal array of voids which are much larger than the mean pore size of the medium.