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What is the purpose of using petroleum jelly?
Chesebrough noticed that oil workers would use a gooey jelly to heal their wounds and burns. He eventually packaged this jelly as Vaseline. Petroleum jelly’s benefits come from its main ingredient petroleum, which helps seal your skin with a water-protective barrier. This helps your skin heal and retain moisture.
What is the purpose of using Vaseline to rim the edges of the coverslip?
Use a small spatula to apply a small amount of melted 1:1:1 vaseline:lanolin:paraffin (VALAP) to the edges of the top coverslip to provide an extra seal. Use the squirt bottle to gently wash the top coverslip, and aspirate off any excess water.
Why is petroleum jelly used to make this slide?
The jelly holds the cover slip to the slide and also keeps the suspension from drying out.
Why is petroleum jelly healing?
Cuts and grazes The American Academy of Dermatology recommends petroleum jelly for keeping a wound moist and to help prevent it from drying out and forming a scab, because they take longer to heal. This will also help prevent a scar from getting too large, deep or itchy.
Why is petroleum jelly used when making wet mounts?
Wet Mount: Organisms such as protozoa may only live 30 minutes under a wet mount slide; applying petroleum jelly to the outer edges of the cover slip creates a seal that may extend the life of the slide up to a few days.
What is the difference between a wet mount technique and a hanging drop method?
The wet mount tend to dry out quickly under the heat of the microscope light; it is simpler to perform than the wet mount, but it is useful for short-term observation only. The hanging drop is a more complex technique, but it allows for longer-term obervation and more reliable observation of motility.
Why is it called petroleum jelly?
In 1872, according to Wikipedia, the online encyclopedia, Chesebrough received patent rights for petroleum jelly. He called it Vaseline, deriving the name from combining the German word “Wasser” which means “water” and the Greek word “elaion” which means “olive oil.”
How do you use petroleum jelly?
For the best results, always apply petroleum jelly when your skin is damp. Help injured skin heal. For minor wounds such as cuts, scrapes, and scratches, use petroleum jelly to keep the wound moist. This helps prevent the wound from drying out and forming a scab, as scabs take longer to heal.