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Brilliant blue FCF dye within beverages items—such as soda—can be used in the blue bottle experiment. In such foods, both the dye and reducing agents are incorporated in the same solution. When the solution is blue, oxygen is present. On the addition of NaOH, a reaction occurs that removes the oxygen, turning the solution clear.
A Ziehl–Neelsen stain is an acid-fast stain used to stain species of Mycobacterium tuberculosis that do not stain with the standard laboratory staining procedures such as Gram staining. This stain is performed through the use of both red coloured carbol fuchsin that stains the bacteria and a counter stain such as methylene blue .
Ziehl–Neelsen stain (classic and modified bleach types) [5]; Kinyoun stain; For color blind people (or in backgrounds where detecting red bacteria is difficult), Victoria blue can be substituted for carbol fuchsin and picric acid can be used as the counter stain instead of methylene blue, and the rest of the Kinyoun technique can be used.
Gram-positive cells have a thick layer of peptidoglycan in the cell wall that retains the primary stain, crystal violet. Gram-negative cells have a thinner peptidoglycan layer that allows the crystal violet to wash out on addition of ethanol. They are stained pink or red by the counterstain, [3] commonly safranin or fuchsine.
It is used as a food coloring, [4] printing ink, [5] biological stain, [6] dental plaque disclosing agent, [7] radiopaque medium, [6] sensitizer for orthochromatic photographic films, and visible light photoredox catalyst. [8] Erythrosine is commonly used in sweets such as some candies and ice pops, and even more widely used in cake-decorating ...
Just like baking soda and vinegar simulate a volcanic eruption, baking soda interacts with acidic ingredients in doughs and batters to create bubbles of CO 2. But instead of spilling out of a ...
To use baking soda when baking powder is called for: For each 1 teaspoon baking powder, use 1/4 teaspoon baking soda + 1/2 teaspoon cream of tartar. If you don't have cream of tartar, you can use ...
Erioglaucine, a food colorant and a redox dye, was found to be an effective substitute for methylene blue in the blue bottle experiment. Since some candies and drinks such as Gatorade contain the dye and a reducing sugar, only sodium hydroxide need be added to turn these food products into a blue bottle solution.