| Holmes' stain | <technique> A silver nitrate staining method for nerve fibres. (05 Mar 2000) |
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| Puchtler-Sweat stain | <technique> For basement membranes, a staining method using resorcin-fuchsin and nuclear fast red solutions after Carnoy's fixative; basement membranes are gray to black and nuclei pink to red. For haemoglobin and haemosiderin, a complex staining method in which, on a yellow background, haemoglobin is stained red, haemosiderin blue to green and elastic fibres are pink. (05 Mar 2000) |
| selective stain | <technique> A stain that colours one portion of a tissue or cell exclusively or more deeply than the remaining portions. (05 Mar 2000) |
| Hortega's neuroglia stain | <technique> One of several silver carbonate methods to demonstrate astrocytes, oligodendroglia, and microglia. (05 Mar 2000) |
| Hucker-Conn stain | <technique> A crystal violet-ammonium oxalate mixture used in Gram's stain. (05 Mar 2000) |
| silver-ammoniacal silver stain | <technique> A stain for the acid protein component of nucleolar regions which are active or which were transcriptionally active in the preceding interphase; uses silver nitrate, ammoniacal silver, and formalin. Synonym: Ag-AS stain. (05 Mar 2000) |
| silver protein stain | <technique> A silver proteinate complex used in staining nerve fibres, nerve endings, and flagellate protozoa; also used to demonstrate phagocytosis in living animals by the cells of the reticuloendothelial system. (05 Mar 2000) |
| silver stain | <technique> Any of a variety of stain's (e.g., Bielschowsky's, Gomori's silver, impregnation stain's) which employ alkaline silver nitrate solutions to stain connective tissue fibres (reticulin, collagen), calcium salt deposits, spirochaetes, neurological tissue, and nucleolar organiser regions. (05 Mar 2000) |
| Nakanishi's stain | <technique> A method for vital staining of bacteria in which a slide is treated with hot methylene blue solution until it acquires a sky-blue colour, after which a drop of an emulsion of the bacteria is put on the cover glass and the latter laid on the slide; the bacteria are stained differentially, some parts more intensely than others. (05 Mar 2000) |
| stain | 1. To discolour by the application of foreign matter; to make foul; to spot; as, to stain the hand with dye; armor stained with blood. 2. To colour, as wood, glass, paper, cloth, or the like, by processess affecting, chemically or otherwise, the material itself; to tinge with a colour or colours combining with, or penetrating, the substance; to dye; as, to stain wood with acids, coloured washes, paint rubbed in, etc.; to stain glass. 3. To spot with guilt or infamy; to bring reproach on; to blot; to soil; to tarnish. "Of honor void, Of innocence, of faith, of purity, Our wonted ornaments now soiled and stained." (Milton) 4. To cause to seem inferior or soiled by comparison. "She stains the ripest virgins of her age." (Beau. & Fl) "That did all other beasts in beauty stain." (Spenser) Stained glass, glass coloured or stained by certain metallic pigments fused into its substance, often used for making ornament windows. Synonym: To paint, dye, blot, soil, sully, discolour, disgrace, taint. Paint, Stain, Dye. These denote three different processes; the first mechanical, the other two, chiefly chemical. To paint a thing is so spread a coat of colouring matter over it; to stain or dye a thing is to impart colour to its substance. To stain is said chiefly of solids, as wood, glass, paper; to dye, of fibrous substances, textile fabrics, etc.; the one, commonly, a simple process, as applying a wash; the other more complex, as fixing colours by mordants. Origin: Abbrev. Fr. Distain. Source: Websters Dictionary (01 Mar 1998) |
| Nauta's stain | <technique> A stain for degenerating axons in which they stain with silver and appear as fragmented and swollen fibres. (05 Mar 2000) |
| negative stain | <technique> Stain forming an opaque or coloured background against which the object to be demonstrated appears as a translucent or colourless area; in electron microscopy, an electron opaque material, such as phosphotungstic acid or sodium phosphotungstate, is used to give detail as to surface structure. (05 Mar 2000) |
| Neisser's stain | <technique> A stain for the polar nuclei of the diphtheria bacillus which uses a mixture of methylene blue and crystal violet. (05 Mar 2000) |
| Stirling's modification of Gram's stain | <technique> A stable aniline-crystal violet stain. (05 Mar 2000) |
| neutral stain | <technique> A compound of an acid stain and a basic stain, such as the eosinate of methylene blue, in which the anion and cation each contains a chromophore group. Synonym: salt dye. (05 Mar 2000) |