An upconversion nanoparticle includes at least one host selected from LiYF.sub.4, NaY, NaYF.sub.4, NaGdF.sub.4, and CaF.sub.3, at least one sensitizer selected from Sm.sup.3+, Nd.sup.3+, Dy.sup.3+, Ho.sup.3+, and Yb.sup.3+ doped in the at least one host, and at least one activator selected from Er.sup.3+, Ho.sup.3+, Tm.sup.3+, and Eu.sup.3+ doped in the at least one host. The upconversion nanoparticle is designed using a calculation from first principles to absorb light in the near-infrared wavelength range whose stability is ensured. Further, a hyaluronic acid-upconversion nanoparticle conjugate, in which the upconversion nanoparticle as described above is bonded to hyaluronic acid, is provided to be used in various internal sites with a hyaluronic acid receptor, particularly enables targeting, and increases an internal retention period and biocompatibility thereof.

A composite silicone rubber particle is disclosed, wherein a part or entire surface of the silicone rubber particle is covered by a fine particle, a surface of which is modified by a functional group containing quaternary ammonium salt. Manufacturing methods of the composite silicone rubber particle are also disclosed, as well as a cosmetic product composition containing the composite silicone rubber particle. The composite silicone rubber particle has hydrophilicity and dispersibility while maintaining excellent fluidity, contains no harmful methanol, and has antimicrobial activity.

Substantially truly spherical silica-coated silicone rubber particles which do not have blocking problems are easily produced, and exhibit excellent dispersion stability, stability during the isolation of particles, and stability of physical properties. The silica-coated silicone rubber particles include silicone rubber particles and a coating layer thereon configured to coat the surface of the silicone rubber particle and formed from silica particles, in a coating amount of 2.010.sup.9 to 3.210.sup.6 kg/m.sup.2. The particles have a sphericity of 0.8 to 1.0.

Cationically-charged particulates and compositions containing the cationically-charged particulates for application to keratinous materials are provided. Methods of preparing the cationically-charged particulates are also disclosed. Methods of increasing the cationic charge on particulates are also provided.

Provided is a silicone resin coated silicone elastomer particle which can be easily produced on an industrial scale, has superior dispersibility and oil absorptivity in a curable organic resin such as an epoxy resin, and has superior workability due to low secondary aggregation compared to conventional silicone elastomer particles. Also provided are applications containing the particles such as organic resin additives, organic resins, coating compositions or coating agent compositions, and cosmetic compositions. The silicone resin coated silicone elastomer particles have part or all of their surface coated with a silicone resin made up of two types of siloxane units. The siloxane units are selected from D units represented by R.sub.2SiO.sub.2/2, T units represented by RSiO.sub.3/2, and Q units represented by SiO.sub.4/2. The particles also have a structure in which at least two silicon atoms in the particles are cross-linked by a silalkylene group with 2 to 20 carbon atoms.

A coated powder comprises (a) particles, and (b) a coating on the surface of the particles including (1) silica moieties, (2) organo oxysilane moieties selected from the group consisting of mono-organo oxysilane moieties, bi-organo oxysilane moieties and tri-organo oxysilane moieties, and (3) poly(dialkyl)siloxane moieties. The amount by weight in SiO.sub.2 equivalents of the organo oxysilane moieties and the silica moieties is at least 0.0625% of the total coated powder weight per m.sup.2/g of the specific surface area of the particle to be coated.

Provided herein is a method of reducing or preventing sunburn caused from visible and ultraviolet radiation in a subject, the method comprising topically applying to the subject a sunscreen composition comprising inorganic UV filtering agents, antioxidants, and at least one inorganic pigment, wherein the at least one inorganic pigments and antioxidants are present in an amount effective to reduce or prevent sunburn caused from visible light. Also provided herein are sunscreen compositions and methods of increasing the SPF of a sunscreen composition that comprises at least one inorganic UV filtering agent.

The present disclosure relates to a method for manufacturing a spicule capable of promoting percutaneous absorption of skin improvement active ingredients and fine diamonds, a spicule manufactured thereby, and a cosmetic composition comprising the same. A spicule cosmetic composition prepared according to the present disclosure can be used in the preparation of a cosmetic composition that may have excellent percutaneous penetration efficacy and may be excellent in functionality.

The present disclosure provides a method of forming a liquid encapsulated core material and encapsulated core material compositions and uses thereof, where an interfacial fluid of a known volume is first layered on a host fluid. The encapsulated core material is then formed either by dispensing a core material from proximity, leading to the formation of a shell of interfacial material around the core material in an interfacially trapped state, or by generating a compound core material with a target inner core enclosed within a higher density outer core using a Y-junction geometry and impinging the said compound core with sufficient kinetic energy onto the floating interfacial fluid layer to form the encapsulated material via complete interfacial penetration of the compound core material.

The present invention relates to a cosmetic composition comprising core particles in a cosmetically or pharmaceutically acceptable carrier, wherein the core particles comprise a heat-curable coating which is the reaction product of a vinyl-functional silicone polymer, a hydride-functional crosslinker, and a metal catalyst.