0
The negative staining techniques uses a dye solution in which the chromogen is acidic and carries a negative charge. (An acidic chromogen gives up a hydrogen ion, which leaves it with a negative charge.) The negative charge on the bacterial surface repels the negatively charged chromogen, so the the cell remains unstained against a colored background.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoIt is a staining technique that uses a dye to stain the background but not the cell. and are used to demonstrate bacterial capsule.
Wiki User
∙ 12y agoA black ink such as nigrosin is usually used for negative staining.
Wiki User
∙ 11y agoThey stain the background, leaving the cells colorless.
Wiki User
∙ 14y agobe careful in the lab
Wiki User
∙ 12y agoNigrosin is used.
Add your answer:
Earn +20 pts
Is uranyl acetate a negative stain?
Yes, uranyl acetate is used as a negative stain in electron microscopy.
What kind of stain would you use to visualize Sars?
Negative stain
What color is Gram- stain?
Gram- negative bacteria turns red to pink after the gram stain is performed.
What is the gram stain of enterobacter cloacae?
Negative
What color are gram negative cells?
Gram positive bacterial stain purple. They do not take up the counter stain.
What is the gram stain for cholera?
Gram Negative
Is uranyl acetate a negative stain?
Yes, uranyl acetate is used as a negative stain in electron microscopy.
Carbolfuchsin can be used as a simple stain and as a negative stain as a simple stain the pH is?
8
Is HIV gram stain positive or negative?
The answer to whether HIV gram-stain positive or negative is that HIV gram-stain is negative. They retain the light red or pink color after the stain.
What kind of stain would you use to visualize Sars?
Negative stain
Why is the technique called negative staining?
Because the cell wall repels the binding of the negative stain therefore the cells do not stain. Because of this the background is stain with the dye used and the bacteria remain colorless. Basically your staining the background, that is, you are not directly staining the cells.
Why is the size more accurate in a negative stain than a simple stain?
since you do not heat fix the slide when you use a negative stain the cells do not shrink or become distorted
What does a negative result for a spore stain indicate about the organism?
A negative result for the spores stain indicate that the gram-negative organism is present. A positive result for a spore stain indicates that a gram positive organism is present.
What color is Gram- stain?
Gram- negative bacteria turns red to pink after the gram stain is performed.
What is shigella dysenteriae gram stain?
Negative
What Gram stain is acetobacter?
Gram negative
What is the gram stain of enterobacter cloacae?
Negative
