Abstract: The description provides a biodegradable hyaluronic acid derivative including at least one modified hyaluronic acid repeating unit represented by the formula (HA)-[O(C?O)NH-M]p, wherein HA is a unit including N-acetyl-D-glucosamine and D-glucuronic acid, M is a modifying moiety containing a C2-16 hydrocarbyl group, and p is an integer of 1 to 4.

Abstract: The invention provides a biodegradable hyaluronic acid derivative including at least one modified hyaluronic acid repeating unit represented by the formula (HA)-[O(C?O)NH-M]p, wherein HA is a unit including N-acetyl-D-glucosamine and D-glucuronic acid, M is a modifying moiety containing a C2-16 hydrocarbyl group, and p is an integer of 1 to 4.

Abstract: The description provides a biodegradable hyaluronic acid derivative including at least one modified hyaluronic acid repeating unit represented by the formula (HA)-[O(C?O)NH-M]p, wherein HA is a unit including N-acetyl-D-glucosamine and D-glucuronic acid, M is a modifying moiety containing a C2-16 hydrocarbyl group, and p is an integer of 1 to 4.

Abstract: The invention provides a biodegradable hyaluronic acid derivative including at least one modified hyaluronic acid repeating unit represented by the formula (HA)-[O(C?O)NH-M]p, wherein HA is a unit including N-acetyl-D-glucosamine and D-glucuronic acid, M is a modifying moiety containing a C2-16 hydrocarbyl group, and p is an integer of 1 to 4.

Abstract: A biodegradable hyaluronic acid derivative comprising a modified hyaluronic acid repeating unit represented by the formula (HA)-[O(C?O)NH-M]p, wherein HA is a unit including N-acetyl-D-glucosamine and D-glucuronic acid, M is a modifying moiety containing a C2-16 hydrocarbyl group or a prepolymer, and p is an integer of 1 to 4. The biodegradable hyaluronic acid derivative when dissolved in a hydrophilic medium can form micelles and can be used to entrap a pharmaceutically active or bioactive molecule.

Abstract: A biodegradable copolymer with a core block comprising bioresorbable hydrophobic polyester segment and from 3 to 10 shell blocks comprising hydrophilic polyethylene glycol segment. The hydrophobic polyester segment and each of the hydrophilic polyethylene glycol segments are linked by a urethane linkage. A polymeric micelle composition containing the copolymer is also provided. The copolymer forms micelles when the concentration of the copolymer in a dispersing medium reaches or exceeds the critical micelle concentration. The micelles possess good drug and bioactive agent delivery characteristics and are suitable for use in drug delivery or cosmetic applications.

Abstract: A biodegradable hyaluronic acid derivative comprising a modified hyaluronic acid repeating unit represented by the formula (HA)-[O(C?O)NH-M]p, wherein HA is a unit including N-acetyl-D-glucosamine and D-glucuronic acid, M is a modifying moiety containing a C2-16 hydrocarbyl group or a prepolymer, and p is an integer of 1 to 4. The biodegradable hyaluronic acid derivative when dissolved in a hydrophilic medium can form micelles and can be used to entrap a pharmaceutically active or bioactive molecule.

Abstract: A biodegradable copolymer with a core block comprising bioresorbable hydrophobic polyester segment and from 3 to 10 shell blocks comprising hydrophilic polyethylene glycol segment. The hydrophobic polyester segment and each of the hydrophilic polyethylene glycol segments are linked by a urethane linkage. A polymeric micelle composition containing the copolymer is also provided. The copolymer forms micelles when the concentration of the copolymer in a dispersing medium reaches or exceeds the critical micelle concentration. The micelles possess good drug and bioactive agent delivery characteristics and are suitable for use in drug delivery or cosmetic applications.