e-Pharmatimes

Nanoparticles are sub-nano-sized colloidal structures composed of synthetic or semi-synthetic polymers. Its size ranges from 1-100nm. One can distinguish two types  of nanoparticles 1.Nanospheres 2.Nanocapsule Nanospheres - matrix systems. Nanocapsules - which are reservoir systems composed of a polymer membrane surrounding an oily or aqueous core. Advantages of Nanoparticles: ·          More uniform effect of the drug ·          Reduction in the frequency of the dosages ·          Site specific targeting ·          Various routes of administration ·          Better drug utilization and less side effects Disadvantages of Nanoparticles: •        High cost •        Productivity more difficult •        Reduced ability to adjust the dose •        Highly sophisticated technology •        Requires skills to manufacture •        Difficult to maintain stability of dosage form. Polymers used in preparation of nanoparticles: NATURAL HYDROPH

Definition: It is defined as a cosmetic preparation meant for improvement of overall attractiveness of the face, It is applied on to the face by means of a powder puff. Cosmetic definition : It is defined as a any article intended to be rubbed, poured, sprinkled or sprayed on, or introduced into, or otherwise applied to the human body or any part thereof for cleansing, beautifying, promoting attractiveness, of altering the appearance and includes any article intended for use as a component of cosmetic. Earlier, soap was excluded from this definition by adding words "but does not include soap" to the definition. But, in 1982, these words were omitted and since then, toilet soaps have been covered under the definition of cosmetic. Purpose: It mask minor visible imperfections It impart smooth finest to the skin It masking of shine due to moisture (or) grease Qualities: It should be very fine & not have any gritty particles It sh