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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 .
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 ...
An educational science experiment known as the "Baking Soda and Vinegar Volcano" uses the acid-base reaction with vinegar acid to mimic a volcanic eruption. The rapid production of CO 2 causes the liquid to foam up and overflow its container. Other ingredients such as dish soap and food coloring can be added to enhance the visual effect. [78]
But you can make your own baking powder: combine 2 tablespoons of baking soda with 1/4 cup of cream of tartar and pass it several times through a sifter. Some cooks believe the DIY baking powder ...
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.
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 ...
Trypan Blue, a living-cell exclusion dye; Triphenyl tetrazolium chloride; Erythrosine, which is Red No. 3 in food coloring, can be used as an exclusion dye. 7-Aminoactinomycin D used e.g. in flowcytometric studies of hematopoietic stem cell viability. Other Vital Stains : Janus Green B is a basic dye and vital stain used in histology.
The material that is trapped coats the underlying material, and the stain reflects backlight according to its own color. Applied paint, spilled food, and wood stains are of this nature. [5] A secondary method of stain involves a chemical or molecular reaction between the material and the staining material. Many types of natural stains fall into ...