blue

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Related to Toluidine blue: methylene blue, toluidine blue dye

blue

1. any of a group of colours, such as that of a clear unclouded sky, that have wavelengths in the range 490--445 nanometres. Blue is the complementary colour of yellow and with red and green forms a set of primary colours
2. 
a. a sportsman who represents or has represented Oxford or Cambridge University and has the right to wear the university colour (dark blue for Oxford, light blue for Cambridge)
b. the honour of so representing one's university
3. Brit an informal name for Tory
4. any of numerous small blue-winged butterflies of the genera Lampides, Polyommatus, etc.: family Lycaenidae
5. Archery a blue ring on a target, between the red and the black, scoring five points
6. a blue ball in snooker, etc
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

blue

[blü]
(optics)
The hue evoked in an average observer by monochromatic radiation having a wavelength in the approximate range from 455 to 492 nanometers; however, the same sensation can be produced in a variety of other ways.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

blue

in American flag, symbolizes justice. [Color Symbolism: Leach, 242; Jobes, 356]
See: Justice
Allusions—Cultural, Literary, Biblical, and Historical: A Thematic Dictionary. Copyright 2008 The Gale Group, Inc. All rights reserved.

Blue

A language proposed by Softech to meet the DoD Ironman requirements which led to Ada. ["On the BLUE Language Submitted to the DoD", E.W. Dijkstra, SIGPLAN Notices 13(10):10-15 (Oct 1978)].
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
References in periodicals archive ?
Toluidine blue test for sperm DNA integrity and elaboration of image cytometry algorithm.
Since fraction Cc-SP1 was weakly visualized on the gel by staining with toluidine blue (Figure 2Aa), it was intended to more accurately analyze this SPs preparation using stains-all as another cationic dye for detection of glycans (Volpi & Maccari, 2002; Rodrigues et al., 2017b; Salles et al., 2017).
Secondary lamellae from infected fish showed hyperplasia, bas, and tip thickening, and/or lamellar fusion (a-b: hematoxylin and eosin; c-d: Masson's trichrome); primary lamellae showed increased MCs/EGCs (arrows), monocytes (M), and lymphocytes (L) ssociated with connective tissue (e-f: Toluidine blue).
The sensitivity and specificity of potassium permanganate and methylene blue was 100% as there were no false positive or false negative results whereas toluidine blue, malachite green and blue ink showed few false negative results, malachite green with least sensitivity (88%) (Table 2).
According to our institute's protocol, staining the smears for 1 min with toluidine blue followed by washing in tap water gave us satisfactory results for evaluating adequacy of the smears.
Positive MCs in the small intestine showed purple-red as they were modified with toluidine blue staining; the light blue nucleus was located at the centre of cytoplasm and filled with dense purple particles.
Hand-sections were taken as close as possible to the area from which epidermal peels were taken, and then stained with Toluidine Blue, a metachromatic stain.
Mast cell numbers were quantified using toluidine blue staining and counting the number of toluidine blue positive cells in 10 high-power field (h.p.f) under a 20x objective lens.
For academic interest, toluidine blue staining was done, which showed typical metachromatism (Figure 7).
Toluidine blue staining and safranin O staining were conducted for proteoglycan detection and extracellular matrix assessment following conventional methods.