| Toluidine blue is a basic dye of the thiazine series closely related to methylene blue. |
| These techniques include dry abrasive blasting and on-site use of methylene chloride or propane torches. |
| Initially our efforts concentrated on the two allyl side chains attached to the heterocycle via a methylene group. |
| Paul Ehrlich improved on Koch's staining procedure, using aniline instead of ammonia and fuchsin instead of methylene blue. |
| The charcoal tubes were desorbed with 1 ml of methylene chloride and analyzed by gas chromatography and mass spectrometry. |
| Some of the dyes to which chromophores give a vibrant color are naphthol yellow, vat blue, congo red, and methylene blue. |
