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  2. Blue bottle experiment - Wikipedia

    en.wikipedia.org/wiki/Blue_bottle_experiment

    The aqueous solution in the classical reaction contains glucose, sodium hydroxide and methylene blue. [14] In the first step an acyloin of glucose is formed. The next step is a redox reaction of the acyloin with methylene blue in which the glucose is oxidized to diketone in alkaline solution [6] and methylene blue is reduced to colorless leucomethylene blue.

  3. Methylene blue - Wikipedia

    en.wikipedia.org/wiki/Methylene_blue

    The methylene blue value is defined as the number of milliliter's standard methylene value solution decolorized 0.1 g of activated carbon (dry basis). [65] Methylene blue value reflects the amount of clay minerals in aggregate samples. [ 66 ]

  4. Methyl blue - Wikipedia

    en.wikipedia.org/wiki/Methyl_blue

    Methyl blue is a chemical compound with the molecular formula C 37 H 27 N 3 Na 2 O 9 S 3.It is used as a stain in histology, [1] and stains collagen blue in tissue sections. It can be used in some differential staining techniques such as Mallory's connective tissue stain and Gömöri trichrome stain, and can be used to mediate electron transfer in microbial fuel cells.

  5. MBAS assay - Wikipedia

    en.wikipedia.org/wiki/MBAS_assay

    A methylene blue active substances assay, or MBAS assay, is a colorimetric analysis test method that uses methylene blue to detect the presence of anionic surfactants (such as a detergent or foaming agent) in a sample of water. An anionic surfactant detected by the color reaction is called a methylene blue active substance (MBAS). [1]

  6. pH indicator - Wikipedia

    en.wikipedia.org/wiki/PH_indicator

    4.0 yellow Methylene blue: colorless 5.0 9.0 dark blue Bromophenol blue: yellow 3.0 4.6 blue Congo red: blue-violet 3.0 5.0 red Methyl orange: red 3.1 4.4 yellow Screened methyl orange (first transition) red 0.0 3.2 purple-grey Screened methyl orange (second transition) purple-grey 3.2 4.2 green Bromocresol green: yellow 3.8 5.4 blue Methyl red ...

  7. Tashiro's indicator - Wikipedia

    en.wikipedia.org/wiki/Tashiro's_indicator

    Tashiro's indicator is a pH indicator (pH value: 4.4–6.2), mixed indicator composed of a solution of methylene blue (0.1%) and methyl red (0.03%) in ethanol [1] ...

  8. Drop (unit) - Wikipedia

    en.wikipedia.org/wiki/Drop_(unit)

    This is equal to about 61.6 μL (U.S.) or 59.2 μL (Britain). Pharmacists have since moved to metric measurements, with a drop being rounded to exactly 0.05 mL (50 μL, that is, 20 drops per milliliter). In hospitals, intravenous tubing is used to deliver medication in drops of various sizes ranging from 10 drops/mL to 60 drops/mL.

  9. Drop (liquid) - Wikipedia

    en.wikipedia.org/wiki/Drop_(liquid)

    Water drops on a leaf Water drops falling from a tap. A drop or droplet is a small column of liquid, bounded completely or almost completely by free surfaces.A drop may form when liquid accumulates at the end of a tube or other surface boundary, producing a hanging drop called a pendant drop.