Per protocol at the institution, the laboratory performed microscopic analysis of urine (formal urinalysis) only if the dipstick examination was positive for nitrite, blood, leukocyte esterase ...

In order to create the target compound – being ammonium nitrate – nitric acid (HNO 3 ... this cooling approach means that the next use of urine will involve a much more efficient vapor ...

and then reacted with potassium in wood ash to form potassium nitrate. Because nitrogen is also found in the urea in human ...