| 单词 | gram stain |
| 释义 | > as lemmasGram stain 1. As a modifier (also in the genitive). Designating a method of staining used to identify and classify bacteria and certain other microorganisms, esp. in Gram stain.The technique of Gram staining involves several steps: an initial staining with a purple dye (gentian violet), fixation of the colour with an iodine solution, washing with alcohol or acetone, and a final staining with a red dye. Some microorganisms retain the purple dye and are known as Gram-positive; Gram-negative organisms lose the purple colour and are stained by the red dye. These staining properties are determined mainly by the structure and peptidoglycan content of the microorganism's cell wall, and correlate with the response of the microorganism to certain types of antibiotic. ΘΚΠ the world > life > biology > laboratory analysis > processes > [noun] > using stains or dyes overstaining1880 Gram stain1884 Nissl method1895 osmication1899 counterstaining1901 cytophotometry1952 polychroming1958 immunofluorescence1960 the world > life > biology > laboratory analysis > material > [noun] > staining material osmium tetroxide1869 picrocarmine1872 rose bengal1878 stain1880 erythrosin1884 Gram stain1884 vesuvin1885 Nile blue1888 pyronin1895 Janus green1898 counterstain1899 Nissl stain1899 Leishman stain1904 trypan blue1911 quinacrine mustard1957 1884 Edinb. Clin. & Pathol. Jrnl. 12 July 804 Dr. M. Afanassiw of St. Petersburg..recommends the following modification of Dr. Gram's method.] 1884 Brit. Med. Jrnl. 6 Sept. 487/2 Gram's method gives good results with many bacteria. 1888 Lancet 6 Oct. 684/2 The organs and blood, after being treated with Gram's stain, were found to contain cocci. 1906 Jrnl. Infectious Dis. 3 495 The Gram stain has, however, been used on all our cultures, since, in the genus Diplococcus and in many other groups, it has been thought to have such special significance. 1964 M. Hynes Med. Bacteriol. (ed. 8) v. 44 All [bacteria] may be placed into one of two broad groups according to whether they stain by Gram's technique. 2009 B. L. Waters Handbk. Autopsy Pract. (ed. 4) vii. 87/1 There is no reason to culture acute perforations of bowel since both Gram stain and culture will point to fecal flora. < as lemmas |
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