摘要:
In an example of a method for making an NO-releasing polymeric composition, a discrete RSNO adduct is dissolved in a solvent to form a discrete RSNO adduct solution. A polymer material is soaked in the discrete RSNO adduct solution for a predetermined time to swell the polymer material and impregnate the polymer material with the discrete RSNO adduct.
摘要:
Described here is a graphene-catalysts conjugate, comprising: a graphene support; a first catalyst conjugated to the graphene support; and a second catalyst conjugated to the graphene support, and the second catalyst is different from the first catalyst. In some embodiments, the first catalyst and the second catalyst correspond to a tandem catalytic system to drive a chemical transformation.
摘要:
The invention provides a composition comprising a nanofiber polymer in which the fibers of the nanofiber polymer are aligned, and a molecule is covalently attached, either directly or through a linker, to the nanofiber polymer. This molecule is capable of either covalently or non-covalently attaching to a member selected from an extracellular matrix component, a growth factor, and combinations thereof. The invention also provides methods of making the composition and methods of using the compositions to add new tissue to a subject, such as a human.
摘要:
The present disclosure provides spun fibers of proteins useful for the fibers, fiber networks and nonwoven fabrics for medical use, with these materials characterized by good biocompatibility properties (e.g., low tendency toward thromboses and inflammation when implanted into a human or animal). These materials can be fabricated from gelatin, collagen or elastin-mimetic proteins, functionalized proteins of the foregoing types, crosslinked functionalized proteins of the foregoing types, and there may be incorporated nonproteinaceous polymers and/or therapeutic proteins or other medicinal compounds. Additionally, there may be living cells colonized on the material of the present invention or living cells may be incorporated during the fabrication process. These materials can be used in medical applications including, without limitation, vascular grafts, reinforcement of injured tissue, wound healing, artificial organs and tissues, prosthetic heart valves and prosthetic ureters.
摘要:
The present invention provides a biocompatible material, comprising a phospholipid or phospholipid derivative comprising various functional groups having specific chemical properties, which can function as a modular surface design unit to be incorporated or appended to a desired substrate on which it is then polymerized, thereby contributing new or specified biochemical characteristics to the polymerized and stabilized biomaterial.
摘要:
A process for providing a surface of glass, silicon, aluminium or silicone rubber of an article useful within medicine with a biocompatible surface layer. Said surface is reacted (after oxidation when required) with a silane containing at least one epoxy group and the surface thus treated is then reacted with a polysaccharide containing at least one hydroxyl group. The invention also relates to an article exhibiting a biocompatible surface layer of a polysaccharide containing at least one hydroxyl group, which polysaccharide is covalently bound to a surface of glass, silicon, aluminium or silicone rubber of the article by means of a silane.
摘要:
A medical needle may include a lumen coating configured to reduce surface energy of the lumen-facing/ lumen defining surface, in a manner effective to slow and/or reduce coagulation of biomaterial (particularly blood) that contacts the needle lumen surface. Such a coating may include a hydrophobic coating such as a silane and/or siloxane material on at least the needle lumen surface. The coating reduces a surface energy of coated needle regions below the surface energy of uncoated regions, and particularly reduces the polar component of the surface energy in the coated needle regions. The needle may be a metallic biopsy needle with the coating comprised by at least a distalmost length of sample-collection lumen.
摘要:
Compositions, reagents, kits, and methods for the reversible, covalent conjugation of functional molecules to engineered surfaces, e.g., surfaces of biomedical devices or used in analytical assays or industrial catalysis, are provided. The compositions, reagents, kits, and methods provided herein allow for the attachment, release, and replacement of functional molecules to and from engineered surfaces in vitro, in situ, and in vivo. Implantable vascular grafts, stents, catheters, and other medical devices with immobilized thrombomodulin-coated surfaces are provided. These molecules can be released from the device surface and replaced with fresh thrombomodulin via systemic administration of the respective reactants and without the need to remove the device.
摘要:
Process for the preparation of polymer materials with high compatibility with organic fluids and tissues comprising a basic polymer to which it is covalently bonded molecules of a polysaccharide comprising disaccharide repetitive unities formed by a uronic acid and an hexosamine.