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Why do the pennies form malachite on them when the salt and vinegar are not rinsed off?
The combination of salt, vinegar, and moisture creates an acidic environment that reacts with the copper in the pennies, causing them to form malachite, which is a copper carbonate compound. The reaction occurs due to the presence of oxygen in the air, which further oxidizes the copper and leads to the formation of malachite. rinsing the pennies removes any excess reactants that could affect the reaction.
What is a principle of mould staining?
Mould staining can be wiped off by Concrobium Mold Stain Eraser.
What does non grain raising stain mean?
NGR stain is a stain (the kind found in the paint aisle, not the kind on your shirt) that will not make the wood grain fibers rise up from the surface of the wood. Raised grain may have to be sanded off.
What are the advantages of the simple stain technique over the negative stain technique?
Negative staining has a dark contrasted background and the bacteria is white. Simple staining has a white background and bacteria is the color depended on your stain color.Negative staining when prepared is NOT heat fixed but simple staining when prepared is heat fixed. Heat fixed means when preparing slide with bacteria on it, it is passed over some type of flame, like a Bunsen burner flame, three times or four times.
Could a negatively charged dye stain a bacteria?
The effect on the bacteria depends if the stain is an acidic or basic stain. Most bacteria are stained when a basic stain permeates the cell wall and adheres by weak ionic bonds to the bacterial cell, which is slightly negatively charged.
Explain the function of water in spore staining?
In spore staining, water is used to decolorize the vegetative cells while leaving the endospores stained. This process helps to highlight the spores as they retain the primary stain, usually malachite green, providing contrast between the spores and the rest of the cell structures.
What prevents the cell from appearing green in the finished endospore stain?
The endospore stain uses malachite green, but this dye is rinsed off the cell during the staining procedure. The endospore itself retains the green color due to its resistance to decolorization, making it appear green against a contrasting counterstain like safranin.
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.
How do you get ink stain off eyeglass lens?
Try anti-bacterial gel, the kind you use to clean your hands. Rub on stain, allow to sit for a few minutes and rub with soft cloth.
Can you use goo gone to remove stain from your hands?
you just run it under cold water and then use butter to rub it off
You spilled nail polish and it has stained your hands how can you get if off?
You can try using nail polish remover to clean the stain off your hands. Alternatively, you could also try rubbing alcohol or lemon juice mixed with baking soda to help lift the stain. Remember to moisturize your hands afterwards as these methods can be drying.
If a light green powder is heated in a test tube A gas is given off while the solid becomes black In which classification of matter does the green powder belong?
The green powder belongs to the category of chemical substances. This is because it undergoes a chemical change when heated, giving off a gas and forming a black solid, indicating a chemical reaction has occurred.
Does stain come off wood when you are cleaning it?
Yes, stain can come off wood when you are cleaning it, depending on the type of stain and the cleaning method used.
How do you remove an iodine stain from the skin?
You can remove an iodine stain from the skin by washing the affected area with soap and water. If the stain persists, you can try using rubbing alcohol or an iodine stain remover. It's important to wash the area thoroughly to prevent skin irritation.
How do you remove liquid fire stains from your sink?
You will need to paint the stain with a pickling gel. It is very rough, but it will get the stain off.
What do you do if your coffee table stain is coming off on your hands?
It sounds as though your table was stained and a finish coat was not applied. Take it back to where you bought it or hire a painter to finish it.
Can you sand off stain to restore the wood surface?
Yes, you can sand off stain to restore the wood surface.
