![]() ![]() Instructor can provide an uninoculated urea for comparison. , predominant protein in milk if casein is hydrolyzed, there will be a clear area surrounding growth no reagents.After 48 hours incubation, observe for ammonia production (basic conditions).Be sure to read about this test in Leboffe and Pierce!.Make sure you draw on the bottom of the petri dish (the part that contains the agar) rather than on the lid. If no color change develops, add a pinch of Zinc and note if the color changes. Instructions: Use all of the following bacteria: Proteus vulgaris, Escherichia coli, Bacillus subtilis Divide your starch agar plate into 4 areas using a wax pencil or a sharpie marker.After 48 hours incubation, perform the test for nitrite as follows:.Alpha-napthylamine Reagent in dropper bottles Sulfanilic Acid Reagent in dropper bottles Instructor can bring out some uninoculated tubes for comparison. Also check to see if any gas has been produced. After 48 hours incubation, observe for acid production. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |