Abstract: A composition for use as a topical delivery system for an active material is provided, the composition comprising a plurality of skin cell removal particles and a plurality of active material molecules, at least some of the skin cell removal particles each carrying at least one active material molecule, wherein carrying of an active material molecule by a skin cell removal particle maintains activity of the active material molecule. A topical delivery system for an active material, and a method of topical delivery of an active material are also provided.

Abstract: A composition comprising nanoparticles of a hydrolysable silicon-contain material for use as a delivery system for a bioactive ingredient, wherein surface of the silicon-containing material is associated with a stabilizing agent which modifies the rate of hydrolysis of the silicon-contain material and/or inhibits the rate of orthosilicic acid polymerization and a method of promoting the controlled release of orthosilicic acid on degradation of a composition comprising nanoparticles of a hydrolysable silicon-contain material, the method involving the treatment of the surface of the silicon-containing material with a stabilizing agent to modify the rate of hydrolysis of the silicon-containing material and/or inhibit the rate of orthosilicic acid polymerization.

Abstract: A composition for use as a topical delivery system for an active material is provided, the composition comprising a plurality of skin cell removal particles and a plurality of active material molecules, at least some of the skin cell removal particles each carrying at least one active material molecule, wherein carrying of an active material molecule by a skin cell removal particle maintains activity of the active material molecule. A topical delivery system for an active material, and a method of topical delivery of an active material are also provided.

Abstract: A composition comprising nanoparticles of a hydrolysable silicon-contain material for use as a delivery system for a bioactive ingredient, wherein surface of the silicon-containing material is associated with a stabilizing agent which modifies the rate of hydrolysis of the silicon-contain material and/or inhibits the rate of orthosilicic acid polymerisation and a method of promoting the controlled release of orthosilicic acid on degradation of a composition comprising nanoparticles of a hydrolysable silicon-contain material, the method involving the treatment of the surface of the silicon-containing material with a stabilizing agent to modify the rate of hydrolysis of the silicon-containing material and/or inhibit the rate of orthosilicic acid polymerisation.

Abstract: The invention provides a composite material comprising a porous semiconductor impregnated with at least one beneficial organic substance, wherein the beneficial organic substance is present in an amount of at least 15% by weight, based on the weight of the material. Also provided are methods for the preparation of such materials, pharmaceutical compositions comprising them and their use in methods of treatment.

Abstract: The invention provides a composite material comprising a porous semiconductor impregnated with at least one beneficial organic substance, wherein the beneficial organic substance is present in an amount of at least 15% by weight, based on the weight of the material. Also provided are methods for the preparation of such materials, pharmaceutical compositions comprising them and their use in methods of treatment.

Abstract: The invention provides the use of a pharmaceutical compositions comprising a cytotoxic drug and a porous carrier material in methods for the treatment of cancer by chemo-brachytherapy, in particular intra-tumoural administration.