| Levaditi stain | <technique> A silver nitrate stain for blackening spirochetes in tissue sections. (05 Mar 2000) |
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| Lillie's allochrome connective tissue stain | <technique> A procedure using PAS, haematoxylin, picric acid, and methyl blue; used for distinction between basement membrane and reticulin, and for demonstration of arteriosclerotic lesions. (05 Mar 2000) |
| Lillie's azure-eosin stain | <technique> A stain in which an azure eosinate solution is used to stain bacteria and rickettsiae in tissues. (05 Mar 2000) |
| Lillie's ferrous iron stain | <technique> A method using potassium ferrocyanide in acetic acid which demonstrates melanins as a deep green colour; lipofuscins and haem pigments are unreactive. (05 Mar 2000) |
| Lillie's sulfuric acid Nile blue stain | <technique> A technique for showing fatty acids when present in high concentrations. (05 Mar 2000) |
| Lison-Dunn stain | <technique> A technique using leuco patent blue V and hydrogen peroxidase to demonstrate haemoglobin peroxidase on time sections and smears. (05 Mar 2000) |
| Loeffler's caustic stain | <technique> A stain for flagella, utilizing an aqueous solution of tannin and ferrous sulfate with the addition of an alcoholic fuchsin stain. (05 Mar 2000) |
| Loeffler's stain | <technique> A stain for flagella; the specimen is treated with a mixture of ferrous sulfate, tannic acid, and alcoholic fuchsin, then stained with aniline-water fuchsin or gentian violet made alkaline with sodium hydroxide solution. (05 Mar 2000) |
| Luna-Ishak stain | <technique> A staining method using celestine blue and acid fuchsin in which bile canaliculi stain pink to red. (05 Mar 2000) |