Â» more... 1  He wrote, amongst other works, a Histoire des troubles des Cevennes ou de la guerre des Camisards (1760). 2  Forschungen (Vienna, 1870); C. Hopf, Chroniques greco-romaines inedites ou peu connues (Berlin, 18 73); H. 3  Hecquard, Histoire et description de la Haute Albanie ou Guegarie (Paris, undated);  S.
Nitrite Test - Urine Test for Nitrites. Normal urine should contain no trace of nitrite. Positive results generally indicate the presence of an adulterant (urine adulteration) or indicate a medical health issue. Adulterants - Nitrites show up in human urine when commonly used commercial adulterants such as Klear or Whizzies are consumed.
When an organism that can deaminate it is inoculated onto the agar the phenylalanine is converted into phenylpyruvic acid. This acid reacts with an added ferric chloride reagent to give a color change to dark green (indicates a positive test). No color change after adding ferric chloride is a negative test.