| Alum | aluminium hydroxide gel |
|---|---|
| TMAH | tetramethyl ammonium hydroxide |
| sodium hydroxide | <chemical> A highly caustic substance that is used to neutralise acids and make sodium salts. Pharmacological action: caustics, pharmaceutic aid. Chemical name: Sodium hydroxide (Na(OH)) (12 Dec 1998) |
|---|---|
| ferric hydroxide | Hydrated iron oxide;a compound previously used, freshly prepared, as an antidote to arsenic poisoning. (05 Mar 2000) |
| lead hydroxide stain | <technique> A stain for electron microscopy; after aldehyde fixation, alkaline lead hydroxide preferentially stains RNA, but after OsO4 fixation, it reacts largely with osmium in tissues to give a general stain; in addition to binding to cytomembranes, it also stains carbohydrates (e.g., glycogen). (05 Mar 2000) |
| air contrast barium enema | A double contrast enema in which air is introduced after coating of the colon with a dense barium suspension for radiographic study. Synonym: air contrast barium enema. (05 Mar 2000) |
| barium | <chemistry> One of the elements, belonging to the alkaline earth group; a metal having a silver-white colour, and melting at a very high temperature. It is difficult to obtain the pure metal, from the facility with which it becomes oxidized in the air. Symbol, Ba. Its oxide called baryta. [Rarely written barytum. Some of the compounds of this element are remarkable for their high specific gravity, as the sulphate, called heavy spar, and the like. The oxide was called barote, by Guyton de Morveau, which name was changed by Lavoisier to baryta, whence the name of the metal. Origin: NL, fr. Gr. Barys heavy. Source: Websters Dictionary (01 Mar 1998) |
| barium chloride | Formerly used as a heart tonic and for varicose veins; extremely toxic. (05 Mar 2000) |
| barium compounds | Inorganic compounds that contain barium as an integral part of the molecule. (12 Dec 1998) |
| barium contrast material | This radiopaque contrast material is either swallowed or given as a enema for the purpose of demonstrating the anatomy of the gastrointestinal tract using X-rays. (27 Sep 1997) |
| barium enema | A radiographic diagnostic procedure that involves the introduction of a barium containing contrast material into the lower gastrointestinal tract via the anus. X-rays taken after instillation of the barium will outline the course and anatomy of the lower GI tract. (27 Sep 1997) |
| barium meal | Oral administration of barium sulfate suspension for radiographic study of the upper gastrointestinal tract (British usage). (05 Mar 2000) |
| barium oxide | BaO;it is caustic, forming the strong base, Ba(OH)2, in water; used as a dehydrating agent. Synonym: baryta. (05 Mar 2000) |
| barium radioisotopes | Unstable isotopes of barium that decay or disintegrate emitting radiation. Ba atoms with atomic weights 126-129, 131, 133, and 139-143 are radioactive barium isotopes. (12 Dec 1998) |
| barium solution | A liquid containing barium sulfate, which shows up on X-rays. It outlines organs of the body so they can be seen on X-ray film. (12 Dec 1998) |
| barium sulfate | <chemical> Sulfuric acid, barium salt (1:1). A compound used as an X-ray contrast medium that occurs in nature as the mineral barite. It is also used in various manufacturing applications and mixed into heavy concrete to serve as a radiation shield. Pharmacological action: contrast media. Chemical name: Sulfuric acid, barium salt (1:1) (12 Dec 1998) |
| barium sulfide | A poisonous grayish yellow powder, used as a depilatory. (05 Mar 2000) |