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The decolorizer, usually acetone or alcohol, is used to wash the Crystal Violet stain from the Gram Negative cells.

From this point Safranin stain is used to stain the Gram Negative cells. The final color for Gram Negative will be a Red/Pink color.

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Minerva Orn

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3y ago

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You used acid-alcohol as the decolorizing agent?

If you used acid-alcohol as the decolorizing agent in spore staining the cells of the bacillus are gram plus. If you use acid alcohol it will not decolorize gram plus cell wall as only gram negative are decolorized. It will not get a differentiation in color.


How can you remove crystal violet in a Gram Stain?

You won't be able to positively distinguish gram negative from gram positive organisms. Crystal violet is used first so that gram positive organisms will take up the dye and this color is not affected by safrinin later on. Gram negative organisms will lose the purple coloring during the decolorizer step, therefore need to be counterstained so that you can view the organisms.


Why gram negative cells lose the primary dye during decolorization?

The high lipid content of Gram-negative cell walls causes them to dissolve in the ethanol or other organic solvent. The violet dye then leaks out of the cell wall. Since Gram-positive cell walls lack this high lipid content, they do not solubilize the organic solvent and thus are able to retain the violet dye.


Assume that during the performance of this exercise you made several errors in your spore staining procedure?

Assume that during the performance of this exercise you made several errors in your spore-staining procedure. In each of the following cases indicate how your microscopic observations would differ from those observed when the slides were prepared correctly . A. you used acid-alcohol as the decolorizing agent . B. you used safranin as the primary stain and malachite green as the counterstain C. you did not apply heat during the application of the primary stain · A. Normally tap water is used as the decolorizing agent to wash off excess stain. When you use acid-alcohol, it decolorizes the cells and the stain is removed. · B.When you use safranin as the primary stain and malachite green as the secondary stain, the cells will stain green and the spores will stain red. · C.When heat is not applied during the application of the primary stain, the spores are not stained and they appear colorless.


Can grams iodine be used before primary stain?

Probably not. The CVI complex formed between the iodine and crystal violet will be trapped in the lipid layer and not the peptidoglycan layer, so you would probably end up over decolorizing. This would cause a lot of false gram negatives. Probably not. The CVI complex formed between the iodine and crystal violet will be trapped in the lipid layer and not the peptidoglycan layer, so you would probably end up over decolorizing. This would cause a lot of false gram negatives.

Related Questions

What is the decolorizing agent in the acid fast stain?

The decolorizing agent in the acid fast stain is acid alcohol. The decolorizing agent in the gram stain is ethanol.


What would happen if you used acid alcohol as decolorizing agent in spore staining?

Using acid alcohol as a decolorizing agent in spore staining can lead to over-decolorization of the spores, resulting in them losing their dye and appearing colorless. This can make it difficult to differentiate the spores from the background under the microscope, affecting the accuracy of the staining process and the ability to visualize the spores effectively. It is recommended to use the proper decolorizing agent, such as acetone or ethanol, for spore staining to achieve optimal results.


You used acid-alcohol as the decolorizing agent?

If you used acid-alcohol as the decolorizing agent in spore staining the cells of the bacillus are gram plus. If you use acid alcohol it will not decolorize gram plus cell wall as only gram negative are decolorized. It will not get a differentiation in color.


What is rinsing?

decolorizing the hair


What is acid rinses?

decolorizing the hair


Why is acid alcohol rather than ethyl alcohol used as a decolorizing agent in the acid fast staining experiment?

Alcohol is a term used for any O-H group that is attached to a carbon. Perhapes the alcohol is found in a Safranin stain. I hope I have this right but if alcohol was used as the decolorizing agent, it may wash out too much stain to get a good view in an oil emersion microscope.


What is the purpose of an antiglycolytic agent?

Its purpose is to inhibit the metabolism of glucose by cells in a specimen of blood.


What is the most crucial step in the gram stain procedure?

The most critical step of gram staining is the decolorization step as crystal violet stain will be removed from both G+ve & G-ve cells if the decolorizing agent(e.g alchohol ) is left on too long.


What is the industrial purpose of water?

Water is used as solvent, cooling agent, cleaning agent, reactant, for electrolysis in many industries.


What is the purpose of sugar when baking?

It's mostly used as a sweetening agent.


Primary Purpose of a biological warfare agent?

to disrupt the airbase mission operations


What is the purpose of adding calcium carbonate after removal of casein?

acts as a drying agent