| TAR | trans -activation responsive region |
|---|---|
| TAR | trans activation response element |
| TAR | trans-activation response region |
| TAR | trans-activation responsive |
| ointment base | The vehicle into which active ingredients may be incorporated. Petrolatum (which may be stiffened with wax) is the most widely used greasy ointment base and is suitable for the incorporation of oleaginous materials. Lin-containing bases will absorb water (and dissolved materials) and form water-in-oil type emulsions. Water soluble (washable) bases are often derived from polymers of ethylene glycol (PEGS); these will absorb water and ingredients dissolved in the water. Ointment bases are usually pharmacologically inert but may entrap water and serve to keep the skin from dying or to provide an emollient protective film. (05 Mar 2000) |
|---|---|
| ointment bases | Various mixtures of fats, waxes, animal and plant oils and solid and liquid hydrocarbons; vehicles for medicinal substances intended for external application; there are four classes: hydrocarbon base, absorption base, water-removable base and water-soluble base; several are also emollients. (12 Dec 1998) |
| ophthalmic ointment | A special ointment for application to the eye that must be free from particles and must be nonirritating to the eye. Synonym: eye ointment, oculentum. (05 Mar 2000) |
| eye ointment | A special ointment for application to the eye that must be free from particles and must be nonirritating to the eye. Synonym: eye ointment, oculentum. (05 Mar 2000) |
| beechwood tar | A thick, oily, dark brown liquid with the odour of creosote; largely used as a source of creosote. Synonym: beech oil. (05 Mar 2000) |
| birch tar | Pyroligneous oil obtained by the dry distillation of the wood of Betula alba and rectified by steam distillation; used externally in the treatment of skin diseases. Synonym: birch tar. (05 Mar 2000) |
| birch tar oil | Pyroligneous oil obtained by the dry distillation of the wood of Betula alba and rectified by steam distillation; used externally in the treatment of skin diseases. Synonym: birch tar. (05 Mar 2000) |
| rectified tar oil | A volatile oil distilled from pine tar; used externally in the treatment of skin diseases such as eczema and psoriasis. (05 Mar 2000) |
| pine tar | Obtained by the destructive distillation of the wood of Pinus palustris and other species of Pinus; used internally as an expectorant, and externally in the treatment of skin diseases. Synonym: liquid pitch. (05 Mar 2000) |
| syndrome, tar | TAR stands for Thrombocytopenia (low blood platelets) and aplasia (absence) of the radius (the long bone on the thumb-side of the forearm), features characterizing this syndrome. There is phocomelia more than (flipper-limb) with the thumbs always present. The fibula (the smaller bone in thye lower leg) is often absent. The risk of bleeding from too few platelets is high in early infancy but lessens with age. The condition is inherited in an autosomal recessive trait with one gene (on a non-sex chromosome) coming from each parent to the tar child. Alternative names include more than thrombocytopenia-absent radius syndrome, radial aplasia-thrombocytopenia syndrome, and tetraphocomelia-thrombocytopenia syndrome. (12 Dec 1998) |
| tar | A thick, black, viscous liquid obtained by the distillation of wood, coal, etc, and having a varied composition according to the temperature and material employed in obtaining it. Coal tar. <chemical> Mineral tar, a kind of soft native bitumen. Tar board, a strong quality of millboard made from junk and old tarred rope. Tar water. A cold infusion of tar in water, used as a medicine. The ammoniacal water of gas works. Wood tar, tar obtained from wood. It is usually obtained by the distillation of the wood of the pine, spruce, or fir, and is used in varnishes, cements, and to render ropes, oakum, etc, impervious to water. Origin: OE. Terre, tarre, AS. Teru, teoru; akin to D. Teer, G. Teer, theer, Icel. Tjara, Sw. Tjara, Dan. Tiaere, and to E. Tree. 63. See Tree. Source: Websters Dictionary (01 Mar 1998) |
| tar acne | An occupational acne-like eruption due to prolonged contact with certain chlorinated compounds (naphthalenes and diphenyls); keratinous plugs (comedones) form in the pilosebaceous orifices, and variously sized small papules (2 to 4 mm) develop. Synonym: chlorine acne, tar acne. (05 Mar 2000) |
| tar camphor | <chemistry> A white crystalline aromatic hydrocarbon, C10H8, analogous to benzene, and obtained by the distillation of certain bituminous materials, such as the heavy oil of coal tar. It is the type and basis of a large number of derivatives among organic compounds. Formerly called also naphthaline. <chemistry> Naphthalene red, a yellow dyestuff obtained from certain nitro derivatives of naphthol. Source: Websters Dictionary (01 Mar 1998) |
| tar keratosis | Warty lesions of the face and hands resulting from repeated, prolonged exposure to tar and pitch; also occurs as keratoacanthoma-like lesions that can become malignant, particularly on the scrotum. (05 Mar 2000) |
| tar syndrome | <syndrome> Tar stands for thrombocytopenia (low blood platelets) and aplasia (absence) of the radius (the long bone on the thumb-side of the forearm), features characterizing this syndrome. There is phocomelia (flipper-limb) with the thumbs always present. The fibula (the smaller bone in the lower leg) is often absent. The risk of bleeding from too few platelets is high in early infancy but lessens with age. The condition is inherited in an autosomal recessive trait with one gene (on a non-sex chromosome) coming from each parent to the tar child. Alternative names include thrombocytopenia-absent radius syndrome, radial aplasia-thrombocytopenia syndrome, and tetraphocomelia-thrombocytopenia syndrome. (12 Dec 1998) |