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Injection of medical polyurethane (MPU) to form a plug in the vas deferens resulted in azoospermia in 96% of men, though these result were seen 24 months after injection. [ 6 ] [ 7 ] [ 8 ] Studies on over 130 men following removal of the plug within five years showed successful restoration of fertility. [ 6 ]
The properties of a hydrogel are highly dependent on the type and quantity of its crosslinks, making photopolymerization a popular choice for fine-tuning hydrogels. This technique has seen considerable use in cell and tissue engineering applications due to the ability to inject or mold a precursor solution loaded with cells into a wound site ...
Self-healing hydrogels are a specialized type of polymer hydrogel.A hydrogel is a macromolecular polymer gel constructed of a network of crosslinked polymer chains. Hydrogels are synthesized from hydrophilic monomers by either chain or step growth, along with a functional crosslinker to promote network formation.
The trial involved 222 men, ages 18 to 50, who applied 5 milliliters of the gel (about a teaspoon) to each of their shoulder blades once per day. The second part of the two-part trial is still ...
IUPAC definition for a crosslink in polymer chemistry. In chemistry and biology, a cross-link is a bond or a short sequence of bonds that links one polymer chain to another. These links may take the form of covalent bonds or ionic bonds and the polymers can be either synthetic polymers or natural polymers (such as proteins).
Cross-linked Hydrogel The reaction scheme below is a terpolymerization to form a cross-linked hydrogel . The reactant ammonium persulfate (APS) is used in polymer chemistry as a strong oxidizing agent that is often used along with tetramethylethylenediamine (TMEDA) to catalyze the polymerization when making polyacrylamide gels .
Glucosepane is a lysine-arginine protein cross-linking product and advanced glycation end product (AGE) derived from D-glucose. [1] It is an irreversible, covalent cross-link product that has been found to make intermolecular and intramolecular cross-links in the collagen of the extracellular matrix (ECM) and crystallin of the eyes. [2]
Hydrogel dressing is a medical dressing based on hydrogels, three-dimensional hydrophilic structure. [1] The insoluble hydrophilic structures absorb polar wound exudates and allow oxygen diffusion at the wound bed to accelerate healing. [ 2 ]