gram staining
31Gram's stain — a method of staining bacterial cells, used as a primary means of identification. A film of bacteria spread onto a glass slide is dried and heat fixed, stained with a violet dye, treated with decolourizer (e.g. alcohol), and then counterstained… …
32Gram , Hans Christian Joachim — (1853–1938) Danish bacteriologist Gram graduated in medicine from the university in his native city of Copenhagen in 1878 and from 1883 to 1885 traveled in Europe, studying pharmacology and bacteriology. While in Berlin (1884) he discovered the… …
33gram-variable — ˈ ̷ ̷| ̷ ̷ ̷ ̷ ̷ ̷ ̷ ̷ adjective Usage: sometimes capitalized G Etymology: Gram s (method) : staining irregularly or inconsistently by Gram s method * * * /gram vair ee euh beuhl/, adj. (often l.c.) of or pertaining to bacteria that stain… …
34Gram's method — /gramz/, (sometimes l.c.) a method of staining and distinguishing bacteria, in which a fixed bacterial smear is stained with crystal violet, treated with Gram s solution, decolorized with alcohol, counterstained with safranine, and washed with… …
35Gram's method — /ˈgræmz mɛθəd/ (say gramz methuhd) noun a method of bacterial staining in which the film is first stained with crystal violet and then with Gram s iodine solution. It permits the classification of bacteria, Gram positive species keeping the… …
36Gram stain — noun Medicine a staining technique for the preliminary distinction of bacteria between two categories (Gram positive and Gram negative). Origin C19: named after the Danish physician Hans C. J. Gram …
37Gram stain — A differential staining procedure that divides bacteria into gram positive and gram negative groups based on their ability to retain crystal violet when decolorized with an organic solvent such as ethanol …
38Gram stain — A heat fixed bacterial smear is stained with crystal violet (methyl violet), treated with 3% iodine/potassium iodide solution, washed with alcohol and counterstained. The method differentiates bacteria into two main classes, Gram positive and… …
39gram-variable — adjective Date: 1956 staining irregularly or inconsistently by Gram s stain …
40Gram's solution — (sometimes l.c.) a solution of iodine, potassium iodide, and water, used in staining bacteria. Cf. Gram s method. * * * …
