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单词 overstaining
释义

overstainingn.

Brit. /ˌəʊvəˈsteɪnɪŋ/, U.S. /ˌoʊvərˈsteɪnɪŋ/
Origin: Formed within English, by derivation. Etymons: over- prefix, staining n.
Etymology: < over- prefix + staining n. Compare slightly later overstain v. 2.
Histology.
Staining of tissue to excess, whether deliberate or accidental (cf. overstain v. 2).
ΘΚΠ
the world > life > biology > laboratory analysis > processes > [noun] > using stains or dyes
overstaining1880
Gram stain1884
Nissl method1895
osmication1899
counterstaining1901
cytophotometry1952
polychroming1958
immunofluorescence1960
1880 Science 27 Nov. 265/2 To exhibit the very delicate structures..it is necessary to color them but slightly. The danger will be in over-staining.
1885 C. O. Whitman Methods of Res. in Microsc. Anat. ii. 42 Minot's picric-acid carmine..gives a stronger differential coloring than Ranvier's picro-carmine; but over-staining must be most carefully avoided.
1929 C. E. McClung Handbk. Microsc. Technique i. 23 Regressive stains..are allowed to act until overstaining is accomplished, after which the desired degree of differentiation is brought about by removal of the excess coloration.
1994 Amer. Jrnl. Bot. 81 1422/2 These structures..could be artifacts of chemical fixation or tannic acid overstaining of the tissue.
This entry has been updated (OED Third Edition, December 2004; most recently modified version published online March 2022).
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n.1880
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