A non-pyrogenic preparation containing nanoparticles synthesized by magnetotactic bacteria for medical or cosmetic applications. The nanoparticles are constituted by a crystallized mineral central part including predominantly an iron oxide, as well as a surrounding coating without material from the magnetotactic bacteria.

Described herein is a cosmetic composition comprising a mixture of metal oxide pigments having different shapes and sizes which provides high coverage and a natural look upon application.

The invention relates to matte nail compositions including polylactic acid microparticles, as well as to methods, kits and nail composition sets related to such compositions.

A titanium oxide powder of the present invention has a BET specific surface area of 5 m.sup.2/g or more and 15 m.sup.2/g or less and contains polyhedral-shaped titanium oxide particles having eight or more faces, in which a mass reduction rate in a case of being heated at 800° C. for 1 hour in an air atmosphere is 0.03% by mass or more and 0.5% by mass or less.

The object of the present invention is to provide a composition for a laminated coating film having designability to a coated body and weather resistance. The present invention provides a composition for a laminated coating film, comprising silicon oxide-coated iron oxide particles, wherein at least a part of the surface of said iron oxide particles is coated with silicon oxide, wherein the diameter of said iron oxide particles is 1 to 50 nm, and wherein the average reflectivity of said silicon oxide-coated iron oxide particles for the light of the wavelengths of 620 to 750 nm is 25% or less. It is preferable that the transmittance of the dispersion comprising said silicon oxide-coated iron oxide particles for the light of the wavelength of 200 to 420 nm is 2.0% or less, and the transmittance of the same for the light of the wavelength of 620 to 780 nm is 80% or more.

The compositions and methods of this invention relate to a leave-on skin care composition containing hydrophobic, linear cellulose particles having an average length of from about 1 to about 500 μm, a particle aspect ratio from about 2 to about 25 and an average thickness of from about 1 to about 500 μm; and a cosmetically acceptable carrier.

A long lasting breath mint including a carrier and a flavorant, wherein the carrier includes at least one of a high viscosity cellulose ether and a low viscosity cellulose either and an alginate. The carrier forms a gel upon contact with saliva. A tablet is placed in the mouth of user, whereupon the tablet is wetted with saliva. A surface of the tablet is converted to a gel resulting in a tablet having an outer gel layer and a core. The gel serves as an adhesive for adhering the tablet to mouth structure. The gel slows exposure of the core to moisture and also slows diffusion of flavorant into the mouth of the user with the gel resulting in a breath mint having an extremely long life prior to complete dissolution, e.g., greater than 30 minutes or longer.

This invention provides core shell silica particles, wherein each core shell silica particle comprises a silica core, and a surface of the silica core etched with group I metal silicate. These core shell silica particles have high surface charge density and anti-bacterial activity. Also provided are compositions comprising core shell silica particles, process of making the core shell silica particles and methods of reducing or inhibiting bacterial activity by administering the core shell silica particles or compositions thereof.

Disclosed herein are core-shell particles and process for preparing the same. The core-shell particles include a functional core, a multilayer or porous shell surrounding the functional core and polymeric tails extending from the shell. The functional core includes an antimicrobial agent or an antitumor agent. Also disclosed herein are pharmaceutical or health care compositions containing the core-shell particles.

Antimicrobial micro- or nanoparticles comprising a chlorhexidine salt and an anion, and a method of making the antimicrobial micro- or nanoparticle, are disclosed. The anion in the salt is selected form oxoanions and partially hydrogenated oxoanions of phosphorus, carbon, nitrogen, and sulfur.