four urine drops are used
lipids
Controls are used as a healthy sample to compare another person's urine test to. Knowing what is healthy helps doctors to see what is unhealthy.
can urine be used to neutralize the nitric acid in aqua regia
Urine.
in the 1700s people used e.g horses sailing ships wind mills and human muscle power. :) nice
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in the 1700s they used many tools like scissors. in the 1700s they used many tools like scissors.
it was used all the way from the 1700s to present
Breathing (sometimes breathing Smallpox)
mainly horses and carriages.
They used indigo.
Yes, and so was salt.
They used coins and paper money.
they used pows needles and sewers.
Aspirin can be used to acidify the urine, as can acetazolamide.
four urine drops are used